Senior Backend Developer

Há 4 dias


Porto, Porto, Portugal Celfocus Tempo inteiro

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 seeking a highly skilled and experienced Senior Developer with the ability to work independently, a strong sense of responsibility, and proven leadership abilities.

As a part of your job, you will:

  • Design, implement, and maintain scalable and robust backend services using Java within microservices architecture.
  • Develop and manage containerized applications using Docker and orchestrate deployments via Kubernetes.
  • Integrate and manage API Gateways (e.g., Kong) to ensure secure and efficient API communication. 
  • Participate in the definition and evolution of system architecture, ensuring alignment with business requirements and technical best practices.
  • Implement monitoring, logging, and alerting using tools like Prometheus, Grafana, and the ELK stack.
  • Apply Site Reliability Engineering (SRE) principles to improve the system's performance, reliability, and incident response.
  • Write clean, maintainable, and well-documented code following industry standards and team practices.
  • Perform code reviews and provide mentorship to junior developers.
  • Collaborate closely with product owners, architects, and cross-functional teams in an Agile environment.
  • Work with Oracle databases and Oracle SOA Suite, when applicable, for integration with existing enterprise systems.

What are we looking for?

  • Extensive experience in developing and managing microservices architectures using Java.
  • Proficient in working with containerized infrastructures, especially with Kubernetes.
  • In-depth knowledge and hands-on experience with API Gateways.

Nice to have:

  • Familiarity with SOA architectures.
  • Experience with Oracle SOA Suite, other ESB tools, and Oracle Database.
  • Expertise in Site Reliability Engineering (SRE) practices, including evolving Terraform and Ansible scripts.
  • Hands-on experience with Kong API Gateway or similar tools.
  • Experience with Identity and Access Management (IAM) solutions, particularly Keycloak.
  • Proficiency with observability and monitoring tools like Grafana, Prometheus, and ELK stack.
  • Background in performance optimization and related techniques.

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



  • Porto, Porto, Portugal QUANTEAM - Portugal (RAINBOW PARTNERS Group) Tempo inteiro

    Who are we?As the founding entity of RAINBOW PARTNERS, Quanteam is a consulting firm specializing in the fields of Banking, Finance, and Financial Services. Guided by our core values of closeness, teamwork, diversity, and excellence, our team of 980 expert consultants, representing 35 different nationalities, collaborates across 10 international offices:...

  • Java Backend Developer

    2 semanas atrás


    Porto, Porto, Portugal emagine Tempo inteiro

    Role Overview:We are seeking an experiencedSenior Backend Developer with Team Lead capabilitiesto join our IT project team. The ideal candidate is a strong technical expert inJava 8 and the latest Java versions, with hands-on experience inSpring Boot, microservices architecture, and cloud integration (preferablyAWS). While the role is backend-focused,...


  • Porto, Porto, Portugal Irium Portugal Tempo inteiro

    At IRIUM we want you to always chase your dreams. Here, prepare yourself to conquer your goals, while enjoying the journey.We are currently looking forSAP Backend DeveloperRequirementsRequired Competencies:3+ years of professional experience as an SAP Backend Developer;Strong technical knowledge of backend development;English proficiency (written and...


  • Porto, Porto, Portugal Wolters Kluwer Tempo inteiro

    We are looking for a Senior Python Backend Developer to join our Machine Learning Team, contributing to the deployment and maintenance of machine learning solutions in production environments.In this role, you will work closely with ML engineers to bridge the gap between model development and scalable, reliable production systems. You will design and...


  • Porto, Porto, Portugal iQube IT Consulting Tempo inteiro

    iQubeiQubeis an IT consulting company based in Lisbon, Portugal, specializing in accelerating its clients' digital transformation through intelligent and efficient technological solutions.The company focuses on three main areas of services: IT Outsourcing (providing scalable integration of experienced professionals), Project Implementation (custom software...

  • Senior Backend Engineer

    2 semanas atrás


    Porto, Porto, Portugal DoiT Tempo inteiro

    Senior Backend Engineer - PerfectScale by DoiTLocationOur Senior Backend Engineer will be an integral part of our EMEA engineering teams. This full-time remote role is open to employees based in the UK, Ireland, Estonia, Netherlands, Sweden, and Spain, and to contractors across other EMEA locations, including Eastern Europe and PortugalWho We AreDoiT is a...


  • Porto, Porto, Portugal Hiire Tempo inteiro

    Hiire is helping Blip, a leading tech company focused on software engineering solutions for sports entertainment, hire a Senior Backend Engineer for their team to guide and support the department.About Blip:Blip is a leading tech company focused on software engineering solutions for sports entertainment.They operate at scale. As part of Flutter...

  • Backend Developer

    2 semanas atrás


    Porto, Porto, Portugal Bitcoin Devs Company Tempo inteiro

    Overview: The Backend Developer - Golang, , based in Porto, plays a crucial role in our organization by developing and maintaining scalable, reliable, and high-performance backend services and APIs for our applications. They will be responsible for designing and implementing server-side logic, optimizing and maintaining the central database, and...

  • Backend Developer

    Há 6 dias


    Porto, Porto, Portugal Fundraise Up Tempo inteiro

    HighlightsLocation: Remote (CET hours preferred)Compensation: €4,450 - €5,800 + stock optionsLanguage: Russian-speaking teamAbout Fundraise UpWe're Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the...


  • Porto, Porto, Portugal Volkswagen Group Digital Solutions [Portugal] Tempo inteiro

    You'll be focused inWorking on the interconnected ecosystem and further develop the state-of-the-art platform to manage software exchanged between trucks & buses and backend infrastructure;Concept development, architectural reviews, development and operationsDeveloping/deploying/maintaining automotive backend microservices based on Java or Kotlin and powered...