Java Developer

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Make an impact

By working for sectors where technology is the enabler, everything is ground‑breaking and there’s a constant need to be innovative.

Create and enhance projects

In Java, Python, Angular, PHP, .NET and so much more while diving into the world of Blockchain, Artificial Intelligence, Data Science, Security and Internet of Things.

Be part of the team

That combines business knowledge, technological edge and a design experience. Our different backgrounds and know‑how are key in developing solutions and experiences for digital clients.

Face challenges

And learn other ways of thinking and seeing the world — there’s always room for your energy and creativity.

About The Role

We are seeking a API Management & Microservices Developer to join the Celfocus Digital Business Line in Portugal. If you possess a disruptive mindset, resilience in the face of failure, innovative thinking, and a willingness to take risks, we invite you to step up and join us

Responsibilities

- Analyze, design, build, test, and deploy API Management and Microservices solutions based on business and technical requirements.

- Work with Solution Architects to design amazing solutions; participate in the definition of the roadmap of the solutions.

- Ensure compliance with enterprise security, governance, and regulatory standards.

- Continuously improve performance, scalability, and reliability of APIs and services.

- Provide technical guidance, best practices, and documentation for APIs and microservices.

- Foster Integration best practices across multiple stakeholders.

- Contribute to the integration platform community to ensure a motivated and collaborative ecosystem.

What are we looking for?

Mandatory

- 3+ years of experience designing and developing Microservices and API Management solutions.

- Experience developing Java software (mandatory experience with Java 8 and latest versions).

- Experience developing using Google Apigee.

- Strong understanding of object-oriented programming and Microservice architecture design patterns.

- Experience in designing and developing API-based and Event-based solutions for scalable, distributed systems.

- Experience in modeling APIs with OpenAPI specifications (Swagger & YAML).

Additional

- Experience in security standards e.g.: HTTPS, TLS, OAuth, JWT, CORS, etc.

- Experience with Caching strategies.

- Experience in Traffic Management strategies.

- Experience in defining and implementing API monetization models.

- Experience in configuring and maintaining API Developer Portals.

- Knowledge in defining API Governance processes.

- Knowledge in transmission protocols (e.g.: HTTP, WebSocket, TCP, UDP, …) and communication standards (e.g.: REST, SOAP, GraphQL, gRPC, …).

- Knowledge in cloud (AWS, Azure, GCP) and containerized solutions (Docker, Kubernetes).

- Experience in Agile delivery methodologies (Scrum, Kanban, etc).

Personal traits

- Ability to adapt to different contexts, teams, and Clients;

- Teamwork skills but also a sense of autonomy;

- Motivation for international projects and ok if travel is included;

- Willingness to collaborate with other players;

- Strong communication skills.

At Celfocus, we are committed to cultivate a diverse and inclusive workplace. As an equal‑opportunity employer, we welcome applicants of all backgrounds, gender identities, and abilities. We are dedicated to providing reasonable accommodations for candidates with specific needs. If you require any adjustments during the selection process, please inform our Talent Acquisition Team.

About Celfocus

Celfocus is pioneering the future of business through Next‑Gen Intelligence – the convergence of data, AI, and human creativity to build more autonomous and adaptive organisations. Guided by our core belief – Making Data Actionable – we partner with leading companies to co‑create intelligent solutions that turn data into insight, agility, and business value. Operating in over 25 countries, we bring together business experts, data scientists, and AI engineers to turn complexity into clarity and vision into measurable impact. Founded in 2000, Celfocus is part of Novabase, listed on Euronext Lisbon. To know more, visit www.celfocus.com

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