Senior Backend Developer

Join Deliverect, a pioneering force in commerce, where our API-first platform is transforming the food and retail industries. We provide businesses with a connected suite of solutions that simplifies operations and enhances revenue streams. Be part of a mission that empowers enterprises to sell seamlessly and deliver effortlessly in a dynamic global market.D…

Join our innovative team at dev2 as a Senior Backend Developer specializing in AdTech. In this role, you will be responsible for designing and implementing robust backend systems that drive our advertising technology solutions. You will work closely with cross-functional teams to ensure seamless integration and performance of applications.

dept offers an internship for a Backend Developer in Amsterdam or Rotterdam. This position gives aspiring developers the chance to gain hands-on experience and learn from seasoned professionals. Role overview The internship centers on supporting backend development for active projects. Interns will join a team of experienced colleagues and take part in real-world software work. What you will do Assist in building and maintaining backend systems for ongoing projects Collaborate with a team of skilled professionals Share ideas and contribute code to development efforts

Join us as a Senior Backend Developer!Are you a skilled backend developer eager to make a significant impact in a rapidly growing and innovative organization? FinancialLease.nl is seeking a passionate Senior Backend Developer to strengthen our Digital Innovations team and contribute to building robust and scalable solutions!About UsAt FinancialLease.nl, we go beyond leasing; we create intelligent digital solutions that simplify complexity. Our Digital Innovations team plays a central role in developing scalable, secure, and user-friendly systems that support the entire organization. We work with a modern tech stack, including C#, ASP.NET Core, TypeScript, React, React Native, and Next.js.We believe in choosing the right tools for the right challenges and prioritize clean, maintainable, and scalable code over quick, temporary fixes. Our engineers are valued partners within the business, directly contributing to the success of our services.Your RoleAs a Senior Backend Developer, you will be responsible for the development and maintenance of our backend systems and APIs. You will collaborate closely with the engineering team to build new features, enhance performance, and ensure the quality of our codebase. This is a hands-on role where you will work across the entire backend stack and actively influence technical decisions.You will join a team that prioritizes quality and structure, striving for sustainable solutions that are well-founded from the ground up.

Location: Eindhoven, on the campus of the Technical University of EindhovenWeekly Working Hours: Full-time [40 hours]Required Education Level: HBO or University | Computer ScienceAt Wolfpack, we take pride in the software we create for our clients. This pride is woven into our culture, encapsulated in our new slogan: “Pack of Hungry Creators.” These three pillars represent our core values: Teamwork & Trust, Learning & Dedication, Pride & Creation. Do these values resonate with you? If so, keep reading!As a Mid-Level Backend Developer (C#), you will collaborate with fellow developers and product owners to deliver high-quality technical solutions and implementations that you can be proud of in a timely manner.What You Tell Your Friends You Do:"As a mid-level developer, I support junior developers by providing advice and constructive feedback on proposed solutions. Sharing knowledge and experience helps everyone grow. My day starts with catching up with the rest of the pack, followed by a daily stand-up. When someone hits a roadblock, I’m eager to help! I design and code scalable, event-driven microservices in C#, while staying current with the latest developments. Continuous learning is essential! Simultaneously, I work on cloud solutions in Azure. Data has always been crucial for our clients, and by 2025, it will be even more critical. I brainstorm with my colleagues to explore potential solutions that add value for our clients. At the end of the day, we unwind over a beer, discussing how we tackled our challenges."But wait… what does that look like day-to-day?You are a reliable team member who knows how to inspire colleagues about new technologies.You implement more complex elements of a project in C#.You investigate new possibilities with cloud solutions and can persuade teammates about new features that provide data-driven value for our current and future clients.You ensure quality control within the team and establish standards.You work closely with other developers and project managers, continuously developing your skills.Develop, develop, develop, of course!

How do you, as a Backend Developer, delight our customers?As a Backend Developer at Kaartje2go, you will play a crucial role in ensuring that our customers enjoy a seamless ordering experience. You will be a part of the Development team, collaborating with Front-end and DevOps colleagues to maintain an efficient ordering process and satisfied customers.We are looking for someone who is eager to stay updated on the latest web technologies, regardless of whether they pertain to Front-end, Backend, or systems. Your willingness to learn and continuously develop your skills is what truly matters.What does a day as a Backend Developer look like?“Whether working from home or in the office, we always start our day together as a team. After a brief meeting, I review the day's agenda. The exciting part is that it varies every day. Some days are filled with various small tasks, while others involve larger projects that can last a week. My work includes small updates, bug fixes, performance enhancements, and integrating new features into our REST API. No two days are alike, which keeps my job enjoyable and challenging.”What makes you unique as a Backend Developer?You are passionate about the IT world and see technological solutions in every problem. Additionally:You have a completed HBO or WO degree in a technical field.You are a PHP specialist or are eager to become one. You are familiar with various frameworks (Symfony) and are willing to learn new ones. Currently, we are working with Symfony 7.4 and PHP 8.5.You are open to satisfying your likely curiosity about Javascript by experimenting with it in various ways.You understand that development and operations go hand in hand. You thrive on continuous integration, delivery, and deployments, and the terminal doesn't intimidate you.About your team at Kaartje2goOur Development department is divided into four teams: Shop, Editor, Core, and JAM. These teams consist of twenty motivated Developers who ensure that the website runs smoothly. Alongside their shared passion for IT, they also share a love for craft beer. Every Friday, lunch starts with a döner or falafel sandwich from Baki’s in Zwolle’s city center, followed by Kink Radio filling the speakers, and a Friday afternoon gathering filled with jokes and dry humor.What we offer youOf course, we believe that Kaartje2go is the best workplace. To also...

Jobgether is seeking a Senior Backend Developer with strong Node.js skills for a partner company. This position is based in the Netherlands and supports remote work arrangements. Role overview This role centers on developing and maintaining large-scale digital financial products for users around the world. The work involves enhancing the core platform architecture, optimizing API performance, and building backend services that are secure, scalable, and highly available. Ensuring infrastructure reliability and resilience is a key part of the job. Key responsibilities Develop and maintain backend systems for digital financial products serving a global audience Improve platform architecture and API performance Build secure, scalable, and reliable backend services Lead new product development and contribute to technical innovation Work closely with engineers across regions in a remote-first environment Address complex challenges in real-time systems, microservices, and distributed applications Requirements Significant experience as a backend developer with advanced Node.js knowledge Proven ability to design and build secure, scalable services Comfort working in distributed, remote teams Strong problem-solving skills, especially in real-time and microservices architectures Work culture The company offers a remote-first culture, providing flexibility and autonomy. Team members collaborate across time zones and value ownership as they create products with a global impact.

Are you seeking a flexible remote work environment as a PHP developer? Are you passionate about the product and eager to make an impact? Do you want to grow alongside a young and close-knit scale-up in the SaaS sector? If so, you might be the PHP Backend Developer we’re looking for at Optios.Optios is an ambitious company with over a decade of experience in the hairdressing and beauty sector. We have evolved from a start-up to a thriving scale-up, actively expanding across various countries and markets. As we continue to grow, we are in need of an experienced PHP developer to join our team.Job ResponsibilitiesYou will contribute to our in-house software platform built with PHP and Symfony, developing new features.You will receive customer feedback and ensure that clients can utilize the software to its fullest potential.In meetings, you will discuss potential improvements for the platform and communicate the progress of the software to the rest of the team alongside your fellow developers.

Join Our Dynamic Team as a Backend Search Developer!We are on the lookout for a passionate and driven search developer to join our energetic and innovative team at Lefebvre Sdu. Together, we are shaping the future of legal research capabilities for lawyers, tax advisors, and businesses.AI is rapidly transforming the legal sector, presenting numerous opportunities to enhance the efficiency and enjoyment of legal work. Lefebvre Sdu leads this transition in the Dutch market with our product, GenIA-L, the first AI solution in the Netherlands capable of reliably addressing legal and tax-related inquiries. Used daily, our ambition is to elevate GenIA-L to new heights, delivering even more accurate answers to increasingly complex legal questions while seamlessly integrating into professionals' daily workflows.Why We Need You – You are an assertive search developer who understands that Retrieval-Augmented Generation (RAG) hinges on excellent retrieval. You approach complexity with curiosity and are eager to harness the power of AI to enhance search capabilities. Your expertise in Elasticsearch will help us maximize our search engine's potential, while your knowledge of other technologies will also contribute significantly. You think beyond the code, proposing ideas to make our results more relevant while balancing quality, speed, and cost. Moreover, you continuously challenge and develop both yourself and your teammates technically.

At Speakap, we are on a mission to revolutionize communication for frontline and deskless workers through our innovative mobile-first Employee Experience Platform. Our platform empowers over 600 clients and 400,000 users in diverse sectors such as retail, hospitality, and healthcare to stay connected, informed, and engaged directly from their smartphones, eliminating the need for traditional email and desktop communications.If you have a passion for crafting clean, scalable, and secure code and enjoy tackling challenges while bringing creative ideas to life, we invite you to join our dynamic team. Help us redefine the future of work and connectivity.What You Will DoYour main responsibility will be to develop and enhance our API, which serves as the backbone of our platform, facilitating communication between web frontends, mobile applications, and third-party services.Collaborate with cross-functional teams to implement new features and enhance existing ones.Ensure the security and performance of our services under all conditions.Engage in architectural discussions to influence technology choices and problem-solving strategies.What You’ll BringA Bachelor’s or Master’s degree along with over 5 years of experience in building scalable, high-performance, multi-tier software while adhering to SOLID principles and design patterns in an agile environment.A strong collaborative spirit, excellent problem-solving abilities, and a commitment to writing clean, maintainable code.Proficiency in PHP 8, ECMAScript 10+, TypeScript, modern frameworks (Symfony 6+ preferred), Docker, CI/CD, Git, and shell scripting.Experience with relational databases (MySQL, MariaDB), automated testing (PHPUnit, Behat), and performance monitoring with DataDog.Familiarity with AWS services (S3, SQS, Lambda, etc.), Linux environments, and network protocols; knowledge of Elasticsearch, Java (8/9), Redis, Lua, NGINX, or OAuth 2 is a plus.A passion for automation, ensuring thorough test coverage, and optimizing repetitive tasks for efficiency.What We OfferAt Speakap, we are more than just a workplace; we are a supportive team that values your growth, ideas, and well-being.

Exceptional Work is a Standard HereDo you see working on the Netherlands' first AI-first insurtech software as the most natural thing in the world? Great, so do we!Alongside your colleagues, you will be part of a Feature team developing our new Inpact Insurance Platform (IIP). You will have considerable freedom to implement improvements and work with the latest innovations from Microsoft. Each day typically starts with a standup meeting where your team addresses the question: how can we automate more 'tedious' tasks smartly?During each sprint, you will focus on developing new features and engaging in DevOps. You will directly contribute to our mission of transforming the insurance landscape by working on the IIP. Your role will involve processing large volumes of unstructured data (emails, PDFs, documents, photos) automatically. Additionally, you will frequently collaborate with other coding teams to optimize features. Each day brings new challenges, allowing you to grow rapidly as a Backend Developer while making a tangible impact for our clients.A Typical Day at InpactAt Inpact, we help insurers innovate, allowing them to focus on what truly matters. As a Backend Developer, you will be building the future of insurance. No fluff, just results. Yes, we are ambitious. However, there is no excessive workload or competition over job titles here. We leave big egos behind while welcoming grand plans with open arms, including our strategy to go fully AI-first, which is already underway. Our team consists of a close-knit group of 100 down-to-earth colleagues who are passionate about technology, AI, and Data Science. We avoid hassle, focusing instead on delivering exceptional results while collaborating with clients to successfully implement our AI solutions.Your Role in Shaping the Future of InsuranceWe seek individuals who consistently deliver high-quality work. No gimmicks, just groundbreaking contributions. No boasting, just pride in our collective achievements. As a Backend Developer, we expect you to:Have a minimum of 2 years of backend development experienceBe proficient in C#Have an affinity for AI, DevOps, and GitHubPossess a proactive and eager-to-learn attitudeBe skilled in CI/CD, API, and SQL

About the Role Anyone AI is looking for a Backend Developer in the Netherlands to focus on systems that support AI training. This position centers on building and improving backend infrastructure to keep AI training efficient and reliable. What You Will Do Develop and maintain backend systems that power AI training workflows Enhance existing infrastructure to improve performance and reliability Work closely with the team to support advanced AI features

Role overview Jobgether is searching for a Senior Node.js Backend Developer in the Netherlands for a partner company. This remote-first role centers on building and maintaining backend systems for digital finance services used worldwide. What you will do Create secure and scalable backend systems to support global digital finance products. Design and maintain real-time infrastructure and APIs for essential financial services. Collaborate with engineers across multiple regions to deliver reliable, high-impact solutions. Work on backend architecture, distributed systems, and performance improvements. Grow technical skills while contributing to products used by customers around the world. Requirements Proven experience as a Node.js backend developer with a history of building dependable infrastructure. Ability to solve complex technical problems and deliver scalable solutions. Comfortable working in a remote-first culture that values autonomy, ownership, and innovation. Enjoys collaborating with skilled engineers and making an impact through technology. Location Based in the Netherlands. This is a remote-first position.

Role Overview monks is looking for a PHP Backend Developer to help build and maintain the backend systems behind our digital projects. This position is based in Hilversum. What You Will Do Design, implement, and maintain backend solutions using PHP Work closely with front-end developers, product managers, and clients to deliver reliable applications Contribute to system architecture improvements and ongoing code quality What We Look For Strong experience with PHP development Focus on clean code and established best practices Interest in collaborating across teams and with clients If you are interested in building high-quality backend systems and enjoy working with others to solve technical challenges, monks would like to connect.

Are you eager to join a dynamic team where your coding skills can have a profound impact? If you are a dedicated developer who thrives on solving intricate technical problems, we invite you to be part of our Core team and help us innovate the Momo platform! As a Senior Backend Developer, you will be crucial in the design, development, and maintenance of our essential backend services utilizing Node.js and TypeScript. Your expertise in Domain-Driven Design (DDD) will empower you to craft robust and scalable systems. Additionally, you will mentor junior developers and advocate for best practices within the team, fostering an environment of growth and collaboration.Who is Momo Medical?Momo Medical is an ambitious and rapidly expanding scale-up based in Delft, tackling one of society's most pressing challenges: the future of (elderly) care. Over the next decade, the demand for care is set to double, coinciding with a 30% retirement rate among the current workforce. Our innovative solutions aim to alleviate the pressure on caregivers while enhancing the quality of care, thereby improving the lives of nursing home residents and increasing job satisfaction among caregivers.Key Benefits of the Position Access to a modern tech stack and a laptop of your choice. Opportunities for contribution, learning, and professional growth. Collaborate with cross-functional teams to deliver high-quality software. Enjoy a hybrid work model, with at least 4 days a week in our Delft office, working alongside a multidisciplinary team committed to excellence. Our technology stack includes Node.js, TypeScript, and AWS cloud services.Your ResponsibilitiesIn this role, you will design and develop high-performance backend services using Node.js and TypeScript, ensuring that the Momo App receives timely notifications and real-time data from various sensors.Implement Domain-Driven Design principles to create maintainable and scalable architectures.Mentor junior developers and promote best practices within the team.Collaborate with cross-functional teams to ensure high-quality software delivery.

At Monks, we prioritize your safety. We will never ask for payment or banking information during the recruitment process. As we expand our teams, please be vigilant against fraudulent job postings or recruitment activities that misuse our name. Protect your personal information throughout the recruitment journey. While we may reach out to candidates via LinkedIn, all applications must be submitted through our official website (monks.com/careers).Monks is actively seeking exceptional Freelance Backend Developers to enhance our projects for Q3 & Q4! If you are proficient in .NET, Java, or Python, and possess practical experience with GCP and infrastructure, we would love to connect with you.Please note: Applicants must be Dutch nationals.Are you ready to engage in thrilling, diverse projects and leave your mark? Join us today—let's create something extraordinary together!About MonksMonks is the global, digital-first, data-driven operating brand under S4 Capital plc. With a legacy of innovation, we combine extensive global marketing and technology services to redefine brand interactions. Through our flagship AI ecosystem, Monks.Flow, we transform marketing into a growth engine, connecting brands to culture in real-time while delivering impactful creative solutions. We address critical business challenges, helping brands achieve sustained long-term success.Monks has been recognized as a Contender in The Forrester Wave™: Global Marketing Services, ranks among Cannes Lions' Top 10 Creative Companies (2022-25), and is featured annually in AdExchanger’s Programmatic Power Players list (2020-24). Additionally, we were honored as Adweek’s first AI Agency of the Year (2023) and received multiple awards for excellence in artificial intelligence.

Are you ready to develop the systems that power our travel platforms and contribute to innovative solutions for thousands of customers each day? If so, this position is perfect for you. You will ensure that our technology runs smoothly and that our ideas come to life.What will you be doing as a Backend Developer?In this role, you will help build the backbone of our applications. You will develop and optimize APIs, databases, and connections with external systems. Collaborating with other developers, you will actively contribute to performance and stability improvements.What we offer:The best deal! Join us for the journey of a lifetime in an informal organization where hard work makes a difference for our customers. You will have opportunities for internal development and growth. We warmly welcome you into a close-knit and friendly team, where together we contribute to our mission: A worry-free journey for the best price!A salary that reflects your experience and responsibilities;25 vacation days (for full-time) and discounts on the most beautiful trips through Prijsvrij Vakanties & D-reizen;Everything arranged: travel expense reimbursement, a solid pension plan, and 8% vacation pay;A comfortable office in the vibrant heart of 's-Hertogenbosch, with sit-stand desks, excellent public transport connections, and a convenient bike plan;Continuous growth! With over 800 online training sessions, you can work on becoming the best version of yourself;Guaranteed fun with Friday afternoon drinks, Bossche Bollen for celebrations, and the monthly Prijsvrij Padel tournament;Exercise at the office, fresh fruit, and collective discounts on your health insurance.

Anyone AI is seeking a Backend Developer to work on a project in partnership with a leading AI laboratory. This remote, part-time role centers on expert evaluation and hands-on software engineering, contributing directly to the development of advanced AI technologies. Role overview This position involves designing and evaluating realistic software engineering tasks. Typical activities include debugging, building new features, refactoring or migrating code, and generating tests. The work also requires creating complex coding scenarios and reviewing the work of peers to ensure technical accuracy and clarity. What you will do Create and implement multi-file coding tasks, including bug fixes, feature development, refactoring, and testing Write clear, natural-language specifications and corresponding reference implementations Develop and improve unit and integration test suites Review tasks created by peers for accuracy, clarity, and realism Identify edge cases, ambiguities, and possible failure points Ensure alignment between specifications, code, and expected results Requirements Fluent English and strong written communication skills 3 to 7 years of professional experience in software engineering Deep knowledge of Python and JavaScript or TypeScript, plus familiarity with Java, C#, or Go Background in backend or full-stack development in production settings Experience with testing frameworks such as pytest, Jest, JUnit, xUnit, or Go testing Strong debugging abilities and comfort working in large, multi-file codebases Experience with code reviews, refactoring, and managing production migrations Engagement details Part-time, project-based Remote work Expected outcomes Deliver high-quality, production-ready coding solutions

Are you a seasoned Backend Developer passionate about crafting microservices and APIs? Join Pon.Bike, the world's largest bicycle manufacturer, and contribute to innovative technologies that enhance the cycling experience.About Pon.BikeAt Pon.Bike, you will be part of a dynamic Agile team of 25 specialists dedicated to continuous improvement and innovation. We are developing a microservice architecture using Nest.js and TypeScript, focusing on data integration platforms for brands like Gazelle, Kalkhoff, and Focus. You will collaborate closely with departments such as Master Data Management and Security & Privacy to develop and maintain our data standards.Your Role as a Backend DeveloperAs a member of the Data Integration Team, you will share responsibility for developing the Pon.Bike Integration Platform, maintaining data connections between brand-specific applications and ERP systems. This involves creating scalable, reusable high-performance code and contributing to the evolution of our Enterprise Architecture.Additionally, you will:Design and implement microservices and APIs.Build and maintain data connections for websites, CRM systems, and external partners.Proactively contribute to team objectives, ensuring efficient collaboration and high performance standards."You get the freedom to bring your ideas to life." - Berry (Senior Developer)Your BackgroundYou are a passionate developer energized by building beautiful solutions. You continuously learn and keep a close eye on the community. You can build on your background:Extensive experience in software development within a microservice architecture.Proficient in Nest.js and TypeScript.Experience with MongoDB, Postgres, and ElasticSearch is a plus.Knowledge of API Gateways, particularly Google Apigee, is a plus.Experience with Event Sourcing as we expand our platform is a plus.Coaching skills to support team members.A keen business insight to find customer-centric solutions.

Ben jij een enthousiaste Backend Developer die de uitdaging aangaat om meer dan 10 miljoen actieve leden van Social Deal te ondersteunen? In deze rol ben je verantwoordelijk voor het garanderen van een optimale gebruikerservaring op onze website.Wat ga je doen als Backend Developer?Je zorgt ervoor dat onze gebruikers altijd kunnen profiteren van de diensten die wij aanbieden.Als teamspeler ben je veelzijdig; je hebt je eigen specialisatie maar pakt ook andere taken op binnen het team.Je stelt prioriteiten voor je werk in overleg met teamleden en Product Owners.Je werkt aan het uitbreiden en verbeteren van verschillende codebases.Je presenteert demo's aan stakeholders, waaronder de directie.Je communiceert actief met andere divisies binnen de Development-afdeling.Met wie werk je samen?Je komt terecht in een hecht team van meer dan 50 collega's, bestaande uit ontwikkelaars, product owners, testers, UX/UI designers en stagiaires. We werken serieus, maar er is altijd ruimte voor een grapje. Regelmatig genieten we samen van een biertje en een borrel.