Java Tech Lead

OSQuay; Lisboa, Viseu; Hybrid; EUR 90.000 - 130.000; Vollzeit

Benefits dieser Stelle

Health insurance extendable to your HH

Sports benefits and partner discounts

Zusammenfassung

OSQuay in Lisbon or Viseu, Portugal is seeking a Java Tech Lead to join the Core Development Department and help design a new payments solution from scratch. You will lead backend teams, drive cloud-native microservices, and ensure security and observability.

You will mentor engineers, oversee code reviews, and collaborate with product owners to deliver scalable, high-availability systems within a hybrid work model.

Qualifikationen

• Degree in Computer Engineering or similar.
• Mandatory Java and cloud-native projects experience, with technical leadership.
• Advanced command of Java (recent versions) and solid experience with Spring Boot (ideally also Spring Cloud).
• Proven experience in cloud native architectures, distributed systems, microservices, and event driven patterns.
• Knowledge of containers and orchestration (Kubernetes or equivalent).
• Strong command of microservices patterns: circuit breaker, saga, retries, API gateway, service discovery, service mesh, REST, gRPC, among others.
• Hands on experience with messaging/streaming (Kafka, Pulsar, RabbitMQ, etc.).
• Knowledge of active/active topologies, geo distribution, fault tolerance, and high availability.
• Experience with distributed databases (SQL/NoSQL) and consistency models (eventual, strong, compensation).
• Solid knowledge of application and API security (OAuth2/OIDC, secrets management, hardening).
• Experience in observability (centralized logging, metrics, tracing) and SRE practices.
• Experience in payments, instant payments, or mission critical financial systems.
• Knowledge of standards such as ISO 20022 and SEPA Inst.
• Certifications in Cloud, Cloud Architecture, and/or Kubernetes (valued).
• Strong communication skills, mentoring ability, technical rigor, and a collaborative spirit.

Aufgaben

• Be the technical focal point of the project, supporting Management and Product Owners in strategic technology and roadmap decisions.
• Design, define, and evolve the cloud native architecture of the solution, based on microservices, APIs, and event driven patterns, ensuring vendor independence (cloud agnostic) and support for active/active topologies.
• Ensure alignment between development and architecture, from solution design through to production release.
• Conduct regular code reviews, promoting good engineering practices, clean code, and automated testing, ensuring the technical quality of the platform.
• Manage and prioritize technical debt, identifying critical refactors and ensuring the sustainable evolution of the product.
• Ensure non functional requirements such as performance, resilience, security, observability, and scalability.
• Support the design of high availability strategies, data consistency, and disaster recovery plans.
• Promote and maintain up to date technical documentation, including architecture, decisions, standards, and development guides.

Kenntnisse

Java

Spring Boot

Microservices architectures

MongoDB

Messaging

Geo distributed setups

Ausbildung

Degree in Computer Engineering or similar

Tools

Kubernetes

Kafka

Pulsar

RabbitMQ

OAuth2/OIDC

Jobbeschreibung

We are looking for a Java Tech Lead based in Lisbon or Viseu, Portugalto strengthen the Core Development Department of a leading client in the Payments sector, as part of the design and development of a new solution built from scratch.

Mandatory: Java, Spring Boot, microservices architectures (backend), MongoDB, messaging, and experience with geo distributed setups/systems.

Requirements

Degree in Computer Engineering or similar

Mandatory experience in Java and cloud native projects, with technical leadership

Advanced command of Java (recent versions) and solid experience with Spring Boot (ideally also Spring Cloud)

Proven experience in cloud native architectures, distributed systems, microservices, and event driven patterns

Knowledge of containers and orchestration (Kubernetes or equivalent)

Strong command of microservices patterns: circuit breaker, saga, retries, API gateway, service discovery, service mesh, REST, gRPC, among others

Hands on experience with messaging/streaming (Kafka, Pulsar, RabbitMQ, etc.)

Knowledge of active/active topologies, geo distribution, fault tolerance, and high availability

Experience with distributed databases (SQL/NoSQL) and consistency models (eventual, strong, compensation)

Solid knowledge of application and API security (OAuth2/OIDC, secrets management, hardening)

Experience in observability (centralized logging, metrics, tracing) and SRE practices

Experience in payments, instant payments, or mission critical financial systems

Knowledge of standards such as ISO 20022 and SEPA Inst

Certifications in Cloud, Cloud Architecture, and/or Kubernetes (valued)

Strong communication skills, mentoring ability, technical rigor, and a collaborative spirit

Work Model: Hybrid, 3 days per week in Lisbon or Viseu.

Main responsibilities

Be the technical focal point of the project, supporting Management and Product Owners in strategic technology and roadmap decisions

Design, define, and evolve the cloud native architecture of the solution, based on microservices, APIs, and event driven patterns, ensuring vendor independence (cloud agnostic) and support for active/active topologies

Ensure alignment between development and architecture, from solution design through to production release

Conduct regular code reviews, promoting good engineering practices, clean code, and automated testing, ensuring the technical quality of the platform

Manage and prioritize technical debt, identifying critical refactors and ensuring the sustainable evolution of the product

Ensure non functional requirements such as performance, resilience, security, observability, and scalability

Support the design of high availability strategies, data consistency, and disaster recovery plans

Promote and maintain up to date technical documentation, including architecture, decisions, standards, and development guides

What we have to offer

A comprehensive benefits package, including Health insurance extendable to your household, sports benefits and other exclusive discounts through our partner network

Challenging international projects, working with leading clients across different industries

Continuous learning and development opportunities, with access to training, certifications, and career development initiatives

A culture of knowledge sharing, collaboration, and continuous improvement

Dedicated support from both your Manager and our People team, ensuring you have the tools, feedback, and opportunities to achieve your career goals