Backend Engineer at devexperts | Sofia

Join our talented team at devexperts as a Backend Engineer, where you'll play a pivotal role in developing cutting-edge software solutions. Your expertise in backend technologies will help us enhance our products and provide exceptional service to our clients.

Join our dynamic team at Accedia as a Quality Assurance Engineer, where your passion for learning and collaboration will be highly valued. We are seeking an enthusiastic QA professional who is eager to grow and share knowledge within a supportive work environment.What You Will Experience:Engage with a diverse range of international clients in a collaborative setting.Work on varied projects across different domains and technology stacks, encompassing the full software development lifecycle, including feature development, issue resolution, testing participation, and documentation preparation.Collaborate closely with a multi-level team to analyze technical requirements, propose architectural and design solutions, estimate efforts, and plan tasks efficiently.Maintain active communication regarding tasks, requirements, issues, and inquiries with both your team and clients.Expand your skill set by learning new technologies, participating in knowledge-sharing initiatives such as delivering internal training sessions, and pursuing professional certifications.

Join the Global Bank tribe at SumUp, where we are developing the essential infrastructure and core services that empower our merchants with digital bank accounts. Our vision is to be the foremost banking partner for small merchants worldwide, delivering a seamless, straightforward, and affordable banking experience tailored to their unique needs.As a member of the Global Bank tribe, you will play a pivotal role in building SumUp's digital banking ecosystem. Collaborate within a diverse, autonomous, and cross-functional team that brings product ideas from concept to reality. Embrace the opportunity to work with talented colleagues from 32 different nationalities spread across cities like Cologne, Berlin, São Paulo, Sofia, London, and Vilnius, all driven by a shared commitment to ownership, purpose, and supporting small businesses in thriving.As a Senior Backend Engineer, you will take charge of enhancing and maintaining a high-throughput banking ecosystem for our merchants within the Global Bank Tribe. Your contributions will be instrumental in architecting and evolving our global banking platform, ensuring high availability, scalability, and observability across various regions. If you're eager to gain hands-on experience in building products for business accounts, card payments, and transfers across Europe and Latin America for SumUp's Global Bank, we invite you to embark on this exciting journey with us!

At Yotpo, we're at the forefront of revolutionizing trust and loyalty in eCommerce. Our AI-driven Reviews and Loyalty solutions empower brands to transform casual browsers into loyal customers and advocates. With deep integrations across the eCommerce landscape and the backing of over 30,000 global brands, Yotpo offers seamless omnichannel experiences that enhance conversion rates, strengthen customer relationships, and foster sustainable growth.As we innovate Yotpo's next-generation platform, we are also investigating how artificial intelligence can create smarter, more personalized eCommerce experiences. If you're passionate about leveraging AI technology alongside modern engineering practices, this position offers a unique opportunity to make a significant impact.In this role, you will be instrumental in developing and refining our platform, ensuring it is reliable, scalable, and serves as a robust foundation for subsequent product lines. You will face complex challenges, including constructing critical applications capable of efficiently managing large datasets and high data volumes.

Join our dynamic team at Kostal Group as an Embedded Software Development Intern! This is a unique opportunity for recent graduates or students aspiring to enhance their technical skills in embedded systems. You will work closely with experienced engineers in a collaborative environment, contributing to innovative projects that shape the future of automotive technology.

Join Us in Our Mission to Empower Wealth BuildingAt trading212, we are redefining the landscape of trading and investing by delivering outstanding products that resonate with our users.Our commitment to fostering a culture of excellence and agility drives our success.Currently, we proudly serve over 4.5 million clients, managing more than €30 billion in assets - a testament to the trust and scale we have achieved in just a few years.Your RoleMake a significant impact on millions of users with every production change you implement.Contribute to our pursuit of technical excellence by developing a frontend monorepo that powers Trading 212’s iOS, Android, Web, and Desktop applications with a focus on efficiency and code reuse.Take ownership of project health; as a product-focused company, maintaining code quality is vital for our longevity.Collaborate within compact, autonomous teams that operate on short release cycles, ensuring agility and high performance without compromising on quality.Engage in mutual learning and knowledge sharing with your colleagues, as we believe in growing together through honest feedback. Essential SkillsProficient in HTML, CSS, and JavaScript.Experience with React/React Native and familiarity with one or more state management libraries.Strong attention to detail.Excellent communication skills. Preferred QualificationsExperience with advanced TypeScript.Currently pursuing or possess a degree in Computer Science. What We OfferOpportunities for rapid personal and professional growth through challenging projects.The chance to make a substantial impact by developing innovative services utilized by millions of investors.Collaborate with a team of intelligent, spirited, and high-achieving colleagues, all focused on a shared vision.A dynamic environment where creativity and ideas are highly valued.Recognition and appreciation for your unique talents and insights.A competitive compensation package.

Join our dynamic team at Accedia as a Junior QA Engineer! We seek a passionate individual eager to learn, collaborate, and advance their career in a supportive environment.What You Can Expect:Engage in diverse projects for international clients, ensuring quality across various domains and technologies.Contribute to the entire software development lifecycle by developing new features, supporting existing ones, troubleshooting issues, participating in the testing process, and preparing documentation.Work closely with a cross-functional team, analyzing technical requirements, proposing architectural and system design solutions, estimating effort, and planning tasks.Communicate actively with team members and clients about tasks, requirements, issues, and open questions.Expand your knowledge by learning new technologies, participating in knowledge-sharing initiatives, and pursuing professional certifications.

Join Experian as a Senior Quality Assurance Engineer - Automation and play a pivotal role in enhancing our software quality through innovative automation techniques. You will be responsible for designing, implementing, and executing automated testing strategies that ensure the delivery of high-quality software solutions. Collaborate with cross-functional teams to identify testing requirements and provide insights to improve product reliability.

Join our innovative team at mangroup as a Senior C# Engineer, where you will play a pivotal role in designing and developing high-quality software solutions. With a focus on cutting-edge technologies and best practices, you will collaborate with cross-functional teams to deliver robust applications that meet our clients' needs.In this role, you will be responsible for writing clean, scalable code while actively participating in code reviews and contributing to architectural decisions. Your expertise in C#, .NET, and software development methodologies will be essential in driving our projects forward.

At Brandwatch, we are committed to empowering every individual to make a significant impact. Your voice is valued here, and your unique insights contribute to our collective success. As part of our global team, you'll flourish in an environment that fosters curiosity, collaboration, and innovation, while making meaningful contributions to the brands we support.Join us in redefining the future of communication and building authentic connections that matter. Whether you are tackling complex challenges or spearheading bold innovations, your growth is synonymous with our success. Together, we will create the conversations of tomorrow.Empower your impact at Brandwatch. Be seen, be understood, be you.Brandwatch is actively seeking a dedicated member for the Measure team. You will join a cross-functional and autonomous product team responsible for delivering solutions for performance monitoring and analytics across major social media platforms including Facebook, Instagram, Twitter, LinkedIn, TikTok, and YouTube.As a Backend Engineer at Brandwatch, you will work with the latest Long-Term Support (LTS) versions of Java and Spring, interfacing with some of the most influential social networks globally. You will consume and store data from their APIs at scale, creating REST APIs that expose vital social media KPIs to our clients. Additionally, you will design and implement a scalable microservice architecture.

Who We AreAt Redis, we are pioneers in building the technology that powers fast applications across the globe. Whether you checked the weather, used your credit card, or tracked your flight status online today, chances are our technology played a vital role. Join us in revolutionizing the world with faster, simpler experiences.Your Role and ResponsibilitiesCollaborate with the Redis Data Integration (RDI) team to develop data streaming pipelines that efficiently mirror data from both relational and non-relational databases to Redis Enterprise, enabling applications to access data at in-memory speeds.Deploy your product at global enterprises, whether on-premise or in the cloud, and engage with cutting-edge technologies across diverse environments.Act as a product owner by proactively identifying opportunities to enhance the product and improve the developer experience.Utilize modern AI-assisted tools to accelerate development and enhance engineering workflows.Focus initially on developing the RDI User Interface for both Cloud and On-premise installations.

About the Role Playtech is looking for a Senior DevOps Engineer to join the team in Sofia. This position focuses on building and maintaining scalable infrastructure, supporting high availability, and streamlining continuous integration and deployment pipelines. What You Will Do Design and implement infrastructure that can grow with business needs Maintain systems for high availability and reliability Optimize CI/CD processes to improve software delivery Work closely with teams across development, QA, and operations to improve the software development lifecycle Contribute to the efficiency and stability of Playtech’s operations Location This role is based in Sofia.

Join the Global Bank tribe where we are revolutionizing the banking infrastructure for merchants. Our mission is to empower small merchants worldwide with a digital business account that simplifies their banking needs, making us the go-to banking partner for them.As a Senior Backend Engineer, you will play a pivotal role in transitioning from fragmented regional systems to a unified global infrastructure, enabling millions of merchants to access seamless banking services tailored to their needs.Your expertise will be crucial in designing and developing a fully distributed, event-driven system that is resilient and compliant across multiple regions.In this role, you will primarily work with Kotlin while having the opportunity to engage with Elixir and Golang. We embrace Extreme Programming methodologies, focusing on small iterations, daily deliveries, and prioritizing technical design quality and deep problem-solving.Our technology stack includes Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes, leveraged by observability tools such as Prometheus, Grafana, and Honeycomb. Additionally, we utilize AI-assisted development tools including Cursor and GitHub Copilot.

Welcome to Kaizen GamingAt Kaizen Gaming, the driving force behind Betano, we rank among the world's leading GameTech companies, operating seamlessly across 19 diverse markets. Our mission is to harness the latest technological advancements to deliver unparalleled experiences to the millions of customers who rely on us for their entertainment.With a vibrant community of over 2,700 team members from more than 40 nationalities spread across three continents, we embrace diversity and innovation. Our #oneteam ethos has earned us recognition as one of the Best Workplaces in Europe and the prestigious Great Place to Work certification across our offices. Are you ready to Press Play on Your Potential?About the RoleAs a Principal Engineer within our Technology department, you will play a pivotal role in shaping our frontend strategies. Your expertise will guide teams in crafting elegant, high-performance solutions to real-world challenges. You will mentor them in coding, testing, debugging, and performance analysis, while conducting thorough code reviews to ensure quality and efficiency.In this role, you will be at the forefront of developing cutting-edge applications using modern technologies. Your focus will include executing our technical roadmap, emphasizing code modularity, reusability, and testability. You will also be responsible for performance tuning and monitoring, while providing vital technical guidance to our development teams, ensuring adherence to best practices and design patterns. Collaborating closely with UI/UX designers, you will elevate the user experience for our customers.Our Technology StackWe leverage a robust tech stack, including Vue.js 3, TypeScript, VueX, Pinia, Tailwind, Webpack, Vite, Storybook, Jest, Vitest, Openshift, and private npm packages to develop our internal shared libraries, alongside a micro frontends architecture.As a Principal Frontend Engineer, your responsibilities will include:Coding alongside engineers, demonstrating technical leadership by addressing root causes and leading by example.Understanding key frontend performance metrics, with experience in debugging frameworks like Lighthouse and ChromeUX.Exerting technical influence across multiple teams, mentoring individuals on advanced technical issues, and assisting technology managers in fostering team member growth.Collaborating with Product and Delivery teams to build scalable solutions that meet non-functional requirements regarding performance, security, and reliability.

Join Bosch Group as a Senior Software Architect specializing in automotive technology. In this pivotal role, you will leverage your expertise to design and implement cutting-edge software solutions that enhance vehicle performance and safety. You will collaborate with cross-functional teams to drive innovation and ensure the highest quality standards in software development.

As part of the global technology organization TietoEVRY, MentorMate specializes in crafting robust technical solutions that facilitate large-scale digital transformation. Our approach integrates strategic insights, innovative design, and exceptional engineering to create advanced applications. With a strong foundation in enterprise web and mobile development, quality engineering, technical architecture, human-centered design, cloud computing, DevOps, data management, and analytics, we empower our team to engage in significant global projects for well-known brands. We appreciate every team member and celebrate our collective achievements through flexible work arrangements, competitive compensation and benefits, and excellent career advancement opportunities within our extensive international team.Role OverviewWe are in search of a skilled React Native Engineer to join our dynamic team and spearhead the development of high-quality mobile applications. You will be instrumental in designing and implementing scalable, efficient, and user-friendly mobile solutions utilizing React Native, with a strong focus on modern JavaScript (ES6+), state management, and clean architecture. This position is perfect for an individual who thrives in a collaborative atmosphere, enjoys tackling intricate challenges, and is dedicated to delivering impactful solutions.

Our mission is to empower individuals to create wealth.At Trading 212, we are transforming the landscape of trading and investing by developing outstanding products that our users adore.Our dynamic team is composed of highly motivated individuals who pursue excellence and cherish autonomy.With over 4.5 million clients and more than €30 billion in assets under management, our growth and trust in the market speak volumes about our success.We are in search of passionate and experienced Principal Software Engineers to drive innovation and scalability in our systems.

Join Our Mission to Empower Wealth BuildingAt trading212, we are revolutionizing the trading and investing landscape by crafting innovative products that resonate with our users.We champion a culture of excellence and agility, driving our success in a rapidly evolving market.Currently, we proudly serve over 4.5 million clients, managing more than €30 billion in assets—a true testament to the trust we have established in just a few years.Your RoleDesign and implement solutions with a comprehensive understanding of business challenges, our service architecture, and the relevant technologies and infrastructure.Be involved in every phase of the software development lifecycle (SDLC)—from gathering requirements and designing implementation to coding, testing, deploying, and monitoring. You will take full ownership of your code and ensure its continuous improvement.Develop robust solutions focused on performance, scalability, and resilience—your code will operate in a high-stakes environment where downtime, latency, and data loss are unacceptable.Collaborate within small, autonomous teams that operate on short release cycles. We value agile methodologies and a balanced approach to processes that avoid chaos without compromising speed.Engage in knowledge sharing and continuous learning with colleagues. As our company evolves, so must we, and constructive feedback is one of our strongest tools for growth. QualificationsProven experience in developing services within a microservice architecture, having contributed to a highly scalable and performant system comprising over 200 microservices.Strong understanding of common communication protocols. You should be adept at utilizing HTTP/WebSockets and AMQP, with the ability to choose the appropriate protocol based on the context.Familiarity with at least one widely-used web framework, regardless of programming language. Our language-agnostic system empowers engineers to select the most suitable language for specific tasks. We strive for a harmonious balance between cutting-edge technologies and proven solutions.A comprehensive understanding of system performance, scalability, and security best practices.

About the Role Ocado Group’s Mobile Fulfilment Systems team in Sofia, Bulgaria builds automation technology for online order fulfilment in retail and warehouse settings. The group combines distributed backend systems, mobile apps, and autonomous mobile robots to support rapid, scalable, and cost-effective order processing. This position sits within the In-Store Fulfilment (ISF) division. The team focuses on designing and developing cloud-based systems, progressive web apps, and web technologies that automate online order fulfilment at scale. About In-Store Fulfilment (ISF) ISF is a cloud-based platform that helps retailers efficiently fulfil online orders, improve the customer experience, and reduce operational costs. The system is live in over 1,000 stores across 11 countries and 4 continents. Each week, it manages more than 300,000 customer orders, covering every stage from routing and cubing to picking, buffering, loading, and dispatching. What You Will Do Architect, develop, and maintain large-scale distributed systems with high availability. Lead technical projects from initial planning through design and delivery. Apply best practices in testing, code quality, monitoring, and alerting to ensure reliable solutions. Shape the long-term architectural and product direction for the team. Integrate AI tools such as Claude Code, Gemini, and others into backend systems. AI and Engineering Focus AI is already part of the software development process at Ocado. The team is growing its AI capabilities and welcomes backend engineers with hands-on experience or a strong interest in AI. This role offers the chance to advance AI initiatives while contributing to core engineering projects.

Role Overview Brandwatch is looking for a Staff DevOps Engineer to help strengthen and refine our development and operations. This position can be based remotely in Hungary or in Sofia, Bulgaria. What You Will Do Work with teams across engineering, product, and operations to design, build, and maintain infrastructure solutions. Lead efforts to improve the efficiency and reliability of our technology stack. Mentor junior engineers, sharing knowledge and guiding their technical growth. Take ownership of projects that introduce new tools, processes, or practices to the organization. Who We’re Looking For Experience building and managing infrastructure in a collaborative environment. Comfort working with cross-functional teams to solve complex problems. Interest in mentoring and supporting the development of others.