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Experience Level
Senior
Qualifications
RequirementsDemonstrated experience as a Software Developer, with a strong focus on innovative and impactful projects. Bachelor’s degree in Computer Science or a related discipline. A minimum of 6 years of hands-on experience with . NET (C#, Entity Framework, async programming, LINQ), including . NET Core and ASP. NET Core. At least 2 years of experience with modern front-end frameworks like React (or other transferable frameworks such as Angular/Vue). A solid understanding of relational databases, particularly SQL Server / Azure SQL. Familiarity with cloud platforms, preferably Azure, with AWS as an acceptable alternative. Experience with DevOps practices and tools. Exceptional communication skills and a passion for mentoring junior developers. A knack for devising creative yet practical solutions to complex technical challenges. Eager to thrive in the fast-paced and evolving environment of a scale-up.
About the job
About Gapstars
Gapstars is a dynamic software development service provider based in the Netherlands, renowned for assembling agile remote teams across Sri Lanka and Portugal. Our talented collective of over 300 TechStars is dedicated to transforming scalable software into high-performance products that define the future. We proudly partner with ambitious tech companies eager to dominate their markets.
The Role
We are seeking an experienced Senior/Lead Full Stack Software Developer to join our client's tech and product team. In this pivotal role, you will be responsible for crafting clean, efficient, and scalable code while also mentoring team members, influencing vital architectural decisions, aiding the tech lead in hiring processes, and collaborating with external partners and suppliers. Most crucially, you will be instrumental in developing and enhancing a transformative mental health platform.
Our technology stack includes: . NET 8, SQL Server, React, and Azure.
About Gapstars
Gapstars is a leading software development service provider from the Netherlands, known for creating remote, agile teams in Sri Lanka and Portugal. Our focus is on delivering innovative tech solutions for ambitious companies aiming to transform their industries.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars is a dynamic software development service provider based in the Netherlands, renowned for assembling agile remote teams across Sri Lanka and Portugal. Our talented collective of over 300 TechStars is dedicated to transforming scalable software into high-performance products that define the future. We proudly partner with ambitious tech…
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsAt Gapstars, we collaborate with some of Europe’s most innovative tech enterprises, ranging from disruptive startups to rapidly expanding scaleups. Our mission is to aid them in constructing high-performing remote engineering teams.With headquarters in the Netherlands and talent hubs in Sri Lanka and Portugal, we boast a workforce of over 275 engineers dedicated to solving real-world problems through cutting-edge technologies. Our teams operate in various sectors, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that lead to impactful results.If you seek a workplace that values technical excellence, fosters a strong culture, and offers ample opportunities for growth, Gapstars is the right place for you.About the RoleAre you an experienced Full Stack Engineer passionate about developing innovative AI-driven applications in the healthcare sector? Do you excel in dynamic environments that challenge you to create scalable and high-performance software solutions? If so, this opportunity is tailored for you!The OpportunityAs a seasoned Full Stack Engineer, you will engage in the design, development, and deployment of scalable applications that support AI-driven solutions. Collaborating closely with engineers, designers, and product teams, you will optimize both front-end and back-end systems for peak performance and reliability.Key ResponsibilitiesDevelop front-end components using contemporary JavaScript frameworks such as React.Design, construct, and enhance scalable back-end services utilizing Python (Flask, FastAPI, or Django).Implement and refine RESTful APIs to ensure seamless integration with front-end components.Design and optimize databases for performance and scalability, primarily using PostgreSQL.Automate CI/CD pipelines and manage AWS cloud deployments.Participate in code reviews and advocate for development best practices.Troubleshoot and resolve production issues, ensuring system reliability.Collaborate with cross-functional teams to translate business requirements into technical solutions.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars collaborates with Europe's most innovative tech companies, ranging from disruptive startups to rapidly growing scaleups, to create high-performing remote engineering teams.With our headquarters in the Netherlands and talent hubs located in Sri Lanka and Portugal, we are proud to employ over 275 engineers dedicated to addressing real-world challenges through cutting-edge technologies. Our teams excel in various domains, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that yield impactful results.If you are seeking an organization that values technical excellence, fosters a strong culture, and provides ample opportunities for growth, welcome to Gapstars.About the RoleAre you a highly proficient Full Stack Engineer excited about developing innovative AI-driven applications within the healthcare sector? Do you excel in an environment that pushes you to create scalable and high-performance software solutions? If this resonates with you, we invite you to apply!In this role, you will be instrumental in building and maintaining our AI-powered platforms, ensuring seamless integration between front-end and back-end services. You will collaborate closely with engineers, designers, and product teams to deliver groundbreaking solutions that enhance our healthcare applications.Develop and maintain front-end applications utilizing modern JavaScript frameworks such as React, Vue, or Angular.Design, implement, and optimize scalable backend services using Python frameworks like FastAPI, Flask, or Django.Create and integrate RESTful APIs to support AI-driven applications.Optimize databases for performance and scalability using SQL.Implement and manage CI/CD pipelines to streamline software deployment.Troubleshoot and debug issues across the stack, ensuring high system reliability.Engage in code reviews and promote best coding practices.Work collaboratively with cross-functional teams to translate business requirements into technical solutions.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars is a leading software development services provider based in the Netherlands, dedicated to building innovative remote teams in Sri Lanka and Portugal for forward-thinking tech companies. With over 300 talented TechStars on board, we are committed to transforming scalable software into high-performance products that drive the future. We partner with ambitious tech companies eager to conquer their markets.About the RoleWe are seeking an experienced Front-End Developer to take the lead in crafting modern, high-performance, and maintainable web application interfaces. You will leverage your expertise in React, TypeScript, and Tailwind CSS to create scalable UI components and features. This position requires a keen focus on user experience, client-side performance optimization, and effective integration with back-end services.Key ResponsibilitiesDesign and develop responsive, reusable UI components utilizing React, TypeScript, and Tailwind CSSImplement effective data fetching strategies using TanStack QueryManage client-side state with ZustandEnhance client-side performance and optimize page load speedCollaborate closely with back-end engineers, designers, and product managersEnsure UI accessibility, responsiveness, and compatibility across various browsersWrite clean, maintainable code adhering to modern front-end best practicesEngage in code reviews and contribute to front-end architectural decisions
Join our dynamic R&D team as a Senior Lead Software Engineer (.NET, C#) at Acumatica! In this pivotal role, you will collaborate with a talented team of developers to design, create, and maintain large-scale, cloud-based ERP, CRM, and web applications utilizing Microsoft technologies such as .NET, C#, and MS SQL Server for businesses across the globe.Engage in the architecture, development, and customization of business applications.Create robust data access layers, business objects, and presentation layers.Innovate and develop modular enterprise-grade software solutions.Provide support for legacy code, focusing on optimization and refactoring.Conduct thorough code analysis to identify and resolve functionality errors.Collaborate with development partners on architecture and code review processes.Mentor and guide developers within Acumatica’s development network while promoting the Acumatica ERP framework.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars, a premier software development services provider located in the Netherlands, specializes in creating remote, agile teams in Sri Lanka and Portugal for pioneering technology firms. With over 300 talented TechStars and innovative professionals, we transform scalable software into high-performance products that drive the future. Our partners include ambitious tech companies eager to dominate their markets.About the RoleWe are seeking a Front-End Developer who will be instrumental in crafting modern, efficient, and sustainable web application interfaces. This role demands extensive collaboration with React, TypeScript, and Tailwind CSS to build scalable UI components and functionalities. A keen focus on user experience, client-side performance enhancement, and seamless backend integration is essential.Key ResponsibilitiesDesign and implement responsive, reusable UI components using React, TypeScript, and Tailwind CSSDevelop effective data fetching methodologies utilizing TanStack QueryOversee client-side state management employing ZustandEnhance client-side performance and optimize page load timesCollaborate closely with back-end engineers, designers, and product managersGuarantee UI accessibility, responsiveness, and cross-browser compatibilityProduce clean, maintainable code that adheres to modern front-end best practicesEngage in code reviews and contribute to the architectural decisions of the front-end
Full-time|On-site|Colombo, Western Province, Sri Lanka
About Gapstars Gapstars partners with leading tech companies across Europe, supporting both startups and scaleups as they build remote engineering teams that deliver real results. Headquartered in the Netherlands, with talent hubs in Sri Lanka and Portugal, Gapstars employs more than 300 engineers. Teams work on projects spanning networking, marketplaces, SaaS, and AI, always focused on practical solutions to real-world problems. The company places a strong emphasis on technical skill, a supportive culture, and opportunities for personal development. Gapstars aims to be a place where engineers can grow and make an impact.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Join Gapstars as a Senior Software Engineer / Associate Technical Lead!At Gapstars, we collaborate with some of Europe's most innovative tech companies, from groundbreaking startups to rapidly growing scaleups, to assemble high-performance remote engineering teams.With our headquarters located in the Netherlands and talent hubs in Sri Lanka and Portugal, we boast over 275 engineers who are passionate about tackling real-world challenges using state-of-the-art technologies. Our teams engage in a wide array of domains, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that yield impactful results.If you are seeking a workplace that values technical excellence, fosters a strong culture, and provides ample opportunities for personal and professional growth, look no further than Gapstars.Role OverviewAre you a talented Full Stack Engineer excited to develop pioneering AI-driven applications in the healthcare sector? Do you excel in environments that push you to create scalable and high-performing software solutions? If yes, we would love to hear from you!Your OpportunityIn your role as a Full Stack Engineer with a strong focus on back-end development, you will be responsible for designing, developing, and deploying scalable applications that power our AI-driven solutions. Collaborating closely with engineers, designers, and product teams, you will ensure that both front-end and back-end systems are optimized for performance and reliability.Key ResponsibilitiesDevelop front-end components utilizing modern JavaScript frameworks such as React.Design, build, and enhance scalable backend services using Python frameworks (Flask, FastAPI, or Django).Implement and optimize RESTful APIs, ensuring seamless integration with front-end components.Design and optimize databases for performance and scalability, particularly using PostgreSQL.Automate CI/CD pipelines and manage AWS cloud deployments.Engage in code reviews and apply best practices for software development.Diagnose and resolve production issues to ensure system reliability.Collaborate with cross-functional teams to translate business requirements into technical specifications.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Join Our Team at GapstarsAre you a talented Full Stack Engineer with a passion for developing innovative AI-driven applications in the healthcare sector? At Gapstars, we collaborate with Europe's most ambitious tech companies to create high-performing remote engineering teams that tackle real-world challenges using modern technologies.As a Full Stack Engineer, you will be at the forefront of designing and deploying scalable applications that enhance AI solutions. You will work in an agile environment alongside engineers, designers, and product teams to optimize both front-end and back-end systems for peak performance and reliability.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars is a leading software development services provider headquartered in the Netherlands, specializing in creating innovative, agile remote teams in Sri Lanka and Portugal. Our mission is to empower ambitious tech companies with top talent, transforming scalable software into high-performance products that are set to redefine the industry landscape.About the RoleAs a Full Stack Developer, you will play a pivotal role in enhancing our internal tools and applications. Your primary focus will be to elevate user experience while ensuring we consistently deliver impactful results. Our commitment to leveraging cutting-edge technology enables us to continually iterate and enhance features, aiming for nothing short of excellence.Key Responsibilities1. Development & MaintenanceDesign, develop, and maintain internal tools and applications, including web scraping systems.Create scalable solutions for data collection and processing from diverse sources.Engage throughout the product lifecycle: from design and development to testing and deployment.2. Production Reliability & Incident ManagementProactively investigate and resolve complex production issues from start to finish.Debug across backend systems, databases, infrastructure, and integrations.Address problems directly in the codebase, ensuring sustainable solutions.Enhance monitoring, logging, and observability for better performance.3. System Enhancements at ScaleIdentify and address performance bottlenecks and scalability challenges.Optimize APIs, queries, and workflows for improved efficiency.Enhance automation systems, including email, integrations, and scraping tools.Minimize technical debt through structural improvements.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Join Our Team at GapstarsAt Gapstars, we collaborate with some of Europe’s most forward-thinking tech companies, ranging from innovative startups to rapidly growing scale-ups, to assemble high-performing remote engineering teams.Our headquarters are in the Netherlands, with talent hubs located in Sri Lanka and Portugal, housing over 300 engineers passionate about tackling real-world challenges using cutting-edge technologies. Our teams operate across various domains, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that yield impactful results.If you seek an organization that values technical excellence, fosters a supportive culture, and encourages professional growth, look no further than Gapstars.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars collaborates with some of Europe’s most innovative tech firms, from disruptive startups to rapidly growing scaleups, assisting them in assembling high-performing remote engineering teams.With our headquarters in the Netherlands and talent hubs in Sri Lanka and Portugal, we boast a vibrant community of 275+ engineers dedicated to tackling real-world challenges through modern technologies. Our teams span various domains, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that yield significant results.If you seek a workplace that champions technical excellence, fosters a strong culture, and provides ample growth opportunities, look no further than Gapstars.About the RoleWe are currently on the lookout for an Associate Technical Lead to become part of our expanding team focused on a cutting-edge, cloud-based platform. This position is ideal for someone with a robust technical background, excellent communication skills, and a solution-oriented mindset.In this role, you will engage with both backend and frontend components, contribute to architectural strategies, and aid in the platform's evolution. We value self-starters who can take initiative and work autonomously within a lean team structure.What You’ll DoDevelop and maintain backend services utilizing C# (.NET 7) and SQL.Enhance frontend applications using TypeScript with frameworks like Blazor or Vue.Design and implement RESTful APIs, ensuring seamless integration between frontend and backend components.Leverage Azure-based cloud services to create scalable and dependable solutions.Work collaboratively with engineers and stakeholders to translate requirements into effective solutions.Engage in live troubleshooting, debugging, and performance optimization efforts.Adapt to evolving tools, frameworks, and processes as the platform progresses.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Join Gapstars as a Technical Lead in Backend DevelopmentAt Gapstars, we collaborate with some of Europe’s most ambitious tech companies, from innovative startups to rapidly growing scale-ups, to build high-performing remote engineering teams.Headquartered in the Netherlands and with talent hubs in Sri Lanka and Portugal, we are proud to have over 275 engineers dedicated to solving real-world challenges using cutting-edge technologies. Our teams span various domains, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that create significant outcomes.If you seek a company that values technical expertise, fosters a strong culture, and offers growth opportunities, consider Gapstars your next home.Role OverviewAre you a talented Full Stack Engineer excited to work on groundbreaking AI-driven applications within the healthcare sector? If you thrive in a challenging environment where you can construct scalable and high-performance software solutions, this position is perfect for you!Key ResponsibilitiesDesign, develop, and optimize scalable backend services using Python frameworks such as Flask, FastAPI, or Django.Create front-end components utilizing modern JavaScript frameworks like React.Implement and enhance RESTful APIs to ensure seamless integration with front-end components.Design and optimize databases for performance and scalability, particularly with PostgreSQL.Automate CI/CD pipelines and manage AWS cloud deployments.Engage in code reviews and enforce development best practices.Diagnose and resolve production issues to maintain system reliability.Collaborate with cross-functional teams to translate business requirements into innovative technical solutions.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Gapstars, a software development services company with headquarters in the Netherlands, brings together more than 300 technology professionals across Sri Lanka and Portugal. The company partners with ambitious tech businesses, providing agile remote engineering teams focused on building scalable, high-performance software products. Role overview The Technical Lead - Node/React will play a central role in guiding the development of modern web platforms within a cross-functional team in Colombo. This position centers on leading key components of the platform, fostering both technical quality and the professional growth of team members. The role suits those who enjoy building large-scale SaaS applications and value continuous learning. What you will do Lead the design and development of essential platform features using Node.js and React Mentor and support a development team, promoting best practices in code quality, security, and scalability Work closely with partners and internal stakeholders to deliver solutions with significant impact Keep up with industry trends and contribute to technical decisions Requirements Experience building large-scale SaaS applications Previous background in leading development teams Strong understanding of code quality, security, and scalable architecture Motivation for ongoing personal and professional development Location This role is based in Colombo, Western Province, Sri Lanka.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Join Us at GapstarsAt Gapstars, we collaborate with Europe's most innovative tech companies, from groundbreaking startups to rapidly growing scaleups. Our mission is to assemble high-performing remote engineering teams that tackle real-world challenges with cutting-edge technologies. With our headquarters in the Netherlands and talent hubs in Sri Lanka and Portugal, we boast a vibrant community of over 275 engineers dedicated to delivering impactful solutions across various domains such as networking, marketplaces, SaaS, and AI. If you seek an environment that fosters technical excellence, a robust culture, and opportunities for growth, Gapstars is the place for you.About the PositionWe are in search of a hands-on Senior Java Developer (ATL/TL level) to take the reins of a complex legacy Java application landscape, currently operating on approximately 20 servers. This environment incorporates an older version of GlassFish and lacks sufficient documentation. Your primary challenge will be to understand, document, and maintain application-level integrations, stabilize the platform, and lay the groundwork for future modernization and migrations.This role emphasizes development and integration ownership rather than operations, requiring a strong focus on technical discovery, documentation, and stewardship of legacy platforms.Key ResponsibilitiesTake ownership of a legacy Java platform from both an application and integration perspective.Discover, map, and document application dependencies, integration points, data flows, interfaces, deployment topology, and key runtime/config assumptions.Analyze and resolve complex production issues related to Java application behavior, performance bottlenecks, runtime issues, integration failures, and stability concerns.Gain familiarity and build confidence in the legacy runtime environment, including GlassFish configuration and deployments.Enhance maintainability through clear technical documentation, diagrams, runbooks, improved logging/observability, and incremental refactoring when appropriate.Support and guide engineering standards as an ATL/TL profile through code reviews, mentoring, and providing technical guidance on integration design and legacy-safe improvements.Collaborate closely with stakeholders to foster a shared understanding of the platform's architecture and future direction.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsGapstars is an innovative software development services provider based in the Netherlands, dedicated to creating agile, remote teams in Sri Lanka and Portugal for forward-thinking tech companies. With over 275 talented TechStars and creative minds, we transform scalable software into high-performance products that are shaping the future. Our partners are ambitious tech firms eager to dominate their respective markets.The RoleAs a Tech Lead, you will oversee the technological aspects of our products, collaborating closely with data scientists and the CTO. You will engage in the iterative development of our application (both web and native), and actively participate in roadmap discussions, sprint planning, and retrospectives. Your contributions will be pivotal in driving the company’s growth by implementing scalable technology solutions that address real-world challenges.Develop our backend using Python and Postgres, along with a modern React frontend.Work on data processing pipelines that utilize open banking data to produce various types of business and financial intelligence.Assist in dev-ops and infrastructure tasks to enhance our technical environment.Drive improvements within our codebase and collaborate with the CTO to maintain smooth technological operations.Contribute in any other areas where your skills can shine.
Full-time|On-site|Colombo, Western Province, Sri Lanka
About GapstarsAt Gapstars, we collaborate with Europe’s most innovative tech companies, from groundbreaking startups to rapidly expanding scaleups, to create high-performing remote engineering teams.With our headquarters in the Netherlands and talent hubs in Sri Lanka and Portugal, our team of over 275 engineers tackles real-world challenges using the latest technologies. We operate across various domains, including networking, marketplaces, SaaS, and AI, delivering scalable solutions that yield significant outcomes.If you are seeking a workplace that fosters technical excellence, a robust culture, and opportunities for growth, you’ll find a home at Gapstars.About the RoleAre you a talented Full Stack Engineer excited to develop innovative AI-driven applications in the healthcare sector? Do you excel in an environment that pushes you to create scalable and high-quality software solutions? If so, this position is tailored for you!The OpportunityAs an experienced Full Stack Engineer, you will be responsible for designing, developing, and deploying scalable applications that empower AI-driven solutions. You will collaborate with engineers, designers, and product teams to ensure both front-end and back-end systems are optimized for peak performance and reliability.ResponsibilitiesDesign and develop scalable back-end services using Python (Flask, FastAPI, or Django).Create front-end components with modern JavaScript frameworks like React.Implement and optimize RESTful APIs for seamless front-end integration.Design and optimize databases for performance and scalability (PostgreSQL).Automate CI/CD pipelines and manage AWS cloud deployments.Engage in code reviews and enforce best practices for software development.Diagnose and resolve production issues to ensure system reliability.Work closely with cross-functional teams to translate business needs into technical solutions.
Join our innovative team at AMDT School of Creativity as an Associate Software Engineer specializing in .NET technologies. We are seeking passionate software engineers dedicated to developing scalable enterprise software solutions that enhance our application platforms. You will work across both front-end and back-end development environments, contributing to projects that aim to improve the user experience and add value to our creative initiatives.As part of our dynamic team at 'dottsnpixels', a technology company under the AMDT umbrella, you will collaborate with creative minds and technologists to craft solutions that positively impact people's lives.
Full-time|On-site|Colombo, Western Province, Sri Lanka
Gapstars, based in the Netherlands, delivers software development services and builds remote teams in Sri Lanka and Portugal. The company supports tech businesses with technology solutions aimed at growth. Over 300 professionals at Gapstars help partners turn scalable software into reliable, high-performance products. Role overview The Senior Quality Assurance Lead guides quality and security practices within the product team. This role shapes and maintains the quality framework, focusing on improving release stability and embedding quality assurance throughout the development cycle. What you will do Lead quality and security initiatives within the product team Develop and maintain the team's quality framework Work to improve release stability and reduce production issues Collaborate closely with engineering and product teams Balance hands-on testing with strategic leadership Support continuous improvement in testing approaches and team practices
Full-time|On-site|Colombo, Western Province, Sri Lanka
Gapstars, headquartered in the Netherlands, builds agile software teams in Sri Lanka and Portugal for scaling tech companies. With a team of over 300 technology professionals, Gapstars delivers high-performance products by focusing on collaboration and innovation throughout every project. Role overview The Technical Lead - PHP/React.js will play a central role in designing, developing, and maintaining product features. This position blends hands-on coding with responsibility for code quality and process improvement. Working within agile, cross-functional teams, the Technical Lead guides engineers from concept to deployment, ensuring solutions are reliable, scalable, and easy to maintain. Key responsibilities Feature ownership and delivery Lead features from initial design through production release and ongoing maintenance. Translate functional and technical requirements into scalable solutions. Deliver features on schedule while meeting internal quality standards. Work closely with Product Owners, designers, and engineers at every stage. Full-stack development Develop backend features with Laravel and frontend features with Next.js as needed. Write clean, reusable code in PHP and TypeScript. Adhere to architectural guidelines and contribute to technical improvements. Support system integrations to ensure smooth communication between components. Quality and reliability Create and maintain unit and integration tests to support quality goals. Monitor and improve performance of existing features. This role is based in Colombo, Western Province, Sri Lanka, and is ideal for those who enjoy both technical leadership and hands-on development across PHP and React.js stacks.
