Remote Java Developer | Proficient in Java, Spring Boot, SQL, Cloud, and Kubernetes

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.

About GapstarsGapstars collaborates with some of Europe's most innovative tech companies, ranging from pioneering 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 boast a vibrant community of over 275 engineers dedicated to tackling real-world challenges using cutting-edge technologies. Our diverse teams specialize in various domains, including networking, marketplaces, SaaS, and AI, providing scalable solutions that yield impactful results. If you seek an organization that embodies technical excellence, a strong culture, and opportunities for growth, Gapstars is the place for you.The RoleWe are in search of a Senior Java Software Engineer who possesses robust backend engineering expertise to assist in the design, construction, and evolution of scalable backend systems. This position demands a senior-level engineer capable of contributing throughout the entire development lifecycle, from architecture and high-level design to implementation, code quality, and collaboration with cross-functional teams.The ideal applicant will demonstrate substantial proficiency in Java, Spring Boot, and microservices architecture, along with strong system design skills and exceptional communication abilities. Experience with event-driven architecture is advantageous, but not a disqualifying factor at this level. A solid foundation in architecture and design in general is adequate.Core ResponsibilitiesLeadership and Technical OwnershipAssume responsibility for technical delivery from design through to implementation.Contribute to high-level solution design and translate requirements into scalable backend solutions.Mentor junior and mid-level engineers and enhance overall team capabilities.Champion engineering quality through code reviews, adherence to clean coding practices, and sound design principles.Engineering and DeliveryDesign, develop, and improve backend applications utilizing Java and Spring Boot.Construct and sustain robust microservices-based systems.Engage in architectural discussions and implementation decisions.Lead incident analysis, root cause investigations, and preventive measures.Ensure all solutions adhere to expected standards for quality, performance, and maintainability.Collaboration and Continuous ImprovementWork in close partnership with Product Owners, Team Leads, Architects, and Engineers.Assist in refinement sessions and help shape technically sound solutions.Encourage collaboration, knowledge sharing, and continuous improvement within the team.

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

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.

About GapstarsGapstars, headquartered in the Netherlands, specializes in software development services, creating agile remote teams in Sri Lanka and Portugal tailored for cutting-edge tech companies. With over 300 passionate TechStars, we focus on transforming scalable software into innovative performance products that shape the technology landscape. Our partners are ambitious tech enterprises aiming to dominate their respective markets.About the RoleWe are seeking a highly skilled Back-End Developer to architect, build, and sustain robust back-end services and APIs. This pivotal role demands extensive proficiency in Python and Django, along with expertise in relational data modeling, caching strategies, and distributed systems. You will play a crucial role in designing back-end components, ensuring data integrity, and establishing secure user authentication and authorization mechanisms.

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.

About GapstarsGapstars is an innovative software development services company based in the Netherlands, dedicated to creating remote, agile teams in Sri Lanka and Portugal. With a talented workforce of over 300 Tech Stars, we are committed to transforming scalable software into high-performance products that drive the future of technology. Our partners include ambitious tech companies aiming to excel in their respective markets.The RoleAt Gapstars, we strive to empower dynamic tech companies with top-tier technical talent. We are on the lookout for a Technical Lead who is passionate about modern web platform development and has a strong desire for personal and professional growth. As a key member of a cross-functional team, you will play a significant role in leading the development of essential components of our platform. The ideal candidate should have substantial experience in creating large-scale SaaS applications and guiding development teams while upholding best practices in code quality, security, and scalability.

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.

About GapstarsGapstars, a premier software development services provider based in the Netherlands, excels in assembling remote agile teams in Sri Lanka and Portugal for forward-thinking tech companies. With a vibrant community of over 300 TechStars and innovative professionals, we transform scalable software into high-performance products that pave the way for the future. Our partners are ambitious tech enterprises striving to dominate their markets.The RoleAt Gapstars, we are dedicated to driving growth for ambitious tech companies by harnessing exceptional tech talent. We are seeking a seasoned and driven engineer with robust programming fundamentals and adaptability to new frameworks. As an Associate Technical Lead, you will design, develop, and deploy user-facing features while ensuring our product maintains its high-quality standards to meet the needs of millions of users.

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.

Gapstars specializes in software development services, with headquarters in the Netherlands and remote teams based in Sri Lanka and Portugal. The company works with technology partners aiming to stand out in their fields, delivering scalable software and high-performance products through a team of more than 300 professionals. Role overview The Technical Lead - Generative AI role focuses on combining solid software engineering with the evolving landscape of applied AI. This position involves designing, building, and assessing AI systems that go beyond prototypes to deliver measurable value. What you will do Design and develop AI solutions that prioritize reliability, clear measurement, and real-world application. Collaborate with data scientists, software engineers, and product managers to create effective AI products. Evaluate AI technologies carefully, focusing on substance rather than trends. Promote automation where it leads to better outcomes. Help build straightforward, efficient systems, with a particular emphasis on the life sciences sector. Location This position is based in 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.

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.

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

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.

Join PetDesk as a Technical Lead - Database Administrator, where you will be a pivotal part of a dynamic engineering organization. In this role, you will work closely with various teams, taking ownership of your applications while the DBA function offers shared operational expertise, performance guidance, and platform stewardship.You will collaborate intimately with DevOps and engineering teams to ensure database reliability, observability, and adherence to best operational practices. As a subject matter expert, your hands-on approach will directly influence the performance and health of our database platforms.In this flat organizational structure, you will have the autonomy to identify problems, diagnose root causes, and implement end-to-end improvements without cumbersome handoffs. Your focus will be on maintaining optimal database performance, security, and scalability while engaging early in the design and development processes to advise on data modeling and database usage. Our environment primarily operates on AWS RDS, with significant SQL Server and an expanding PostgreSQL workload. Your day-to-day responsibilities will include performance analysis, query optimization, and operational troubleshooting, with a strong emphasis on proactive enhancements.

Role OverviewWe are seeking a Senior Technical Lead to spearhead the engineering delivery and define the technical vision for our innovative product/platform. You will be responsible for making architectural decisions, mentoring a team of engineers, ensuring quality releases, and collaborating closely with Product Management, Quality Assurance, and DevOps teams to create scalable, secure, and maintainable solutions.

About GapstarsGapstars is a premier software development services provider based in the Netherlands, specializing in the creation of remote, agile teams in Sri Lanka and Portugal for forward-thinking tech businesses. Currently, we are proud to have over 300 TechStars and innovative specialists who transform scalable software solutions into impactful products that define the future. Our partners consist of ambitious technology companies eager to dominate their markets.About the RoleAs an Associate Technical Lead, you will play a crucial role in designing, developing, and maintaining high-performance back-end services and APIs. This position demands extensive knowledge in Python, Django, relational data modeling, caching strategies, and distributed systems. You will contribute to the architecture of back-end components, guarantee data integrity, and implement robust authentication and authorization mechanisms.

About Gapstars Gapstars is a software development services company headquartered in the Netherlands, with a focus on building remote, agile teams in Sri Lanka and Portugal. The company partners with tech firms aiming to scale, offering talent and solutions that help turn software into meaningful products. With a team of over 275 TechStars, Gapstars supports clients as they grow their businesses and compete in their markets. Role Overview The Associate Tech Lead / Tech Lead - Python will guide technical development across products, working closely with data scientists and the CTO. This role involves hands-on work in both web and native application development, as well as participation in roadmap planning, sprints, and retrospectives. The position calls for a blend of technical leadership and active contribution to building scalable technology that solves real business problems. Key Responsibilities Improve the Python and Postgres backend, and contribute to the React frontend. Build data processing pipelines to analyze open banking data and deliver business and financial insights. Support dev-ops and infrastructure activities as needed. Recommend enhancements to the codebase and work with the CTO to maintain strong technical performance. Take initiative in areas that match your strengths and expertise. Location This position is based in Colombo, Western Province, Sri Lanka.