Senior Developer em Lisboa, Portugal

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 in 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 looking for a Senior Developer with a strong willingness to learn and a people‑first leadership mindset , capable of working autonomously and taking end‑to‑end ownership of solutions.
This role goes beyond pure development: it suits someone who enjoys growing their skills , supporting the development of others , shaping the domain offering , contributing to pre‑sales activities, and collaborating with a diverse set of stakeholders.

As a part of your job, you will:

• Design, develop, and maintain scalable and resilient solutions in Java, following microservices architecture.
• Actively contributes to the architecture evolution of existing assets/products, ensuring alignment with business goals, cloud patterns and engineering best practices.
• Build and operate containerized applications, promoting modern deployment and operational standards.
• Build conceptual, logical, and physical data models leveraging relational database technologies.
• Implement and continuously improve monitoring, logging, and alerting using tools such as Prometheus, Grafana, and the ELK stack.
• Proficient in applying CI/CD methodologies, including pipeline creation, automated testing, version control integration, and deployment orchestration.
• Mentor team members and support their development while embracing continuous learning.
• Lead code reviews and act as a technical reference promoting best practices.
• Support pre‑sales activities and contribute to shaping domain offerings.
• Collaborate with the Customer, Product Owners, Architects, and other stakeholders to ensure clear communication and balanced delivery expectations.
• Work in a dynamic and agile environment and contribute to continuous process improvement.

What are we looking for?

• Proven ability to design, implement, and optimize microservices using Spring Boot , aligned with cloud‑native and distributed‑system patterns.
• Solid hands-on experience with Kubernetes and containerized environments .
• Proficiency in database design , SQL optimization, and schema evolution across relational database technologies.
• Strong experience with event‑driven architecture and messaging platforms such as Kafka .

Nice to have:

• Knowledge of JavaScript frameworks for frontend development (React, Angular, Vue).
• Understanding of CI/CD infrastructure and tooling.
• Experience working with API Gateways and applying standard integration patterns.
• Experience with Identity and Access Management (IAM) solutions, especially Keycloak.
• Proficiency with observability and monitoring tools (Grafana, Prometheus, ELK).
• Background in performance tuning and optimization.

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.

Come join the Team!