Senior Java Developer

Description

Job Summary: We are seeking a Java Developer with Spring Boot expertise to design and maintain microservices and APIs, with a focus on cloud-native technologies and performance optimization. Key Highlights: 1. Microservices and API development in Java with Spring Boot 2. Focus on cloud-native technologies and performance optimization 3. Collaboration with multidisciplinary teams in the technical design of solutions The **Timestamp Group** brings together several leading Portuguese IT solution and service companies, united by the principles of excellence and knowledge sharing. We invest in technological leadership, grounded in service quality and robust technological solutions, supported by continuous training and certification. ##### **Responsibilities** * Develop and maintain microservices, APIs, and business logic in Java with Spring Boot, adhering to software development best practices and program-defined standards. This development must align with and be oriented toward cloud-native and cloud-agnostic technologies, and continuously undergo performance optimization, monitoring, and improvement—considering inherent volume, resilience, and latency requirements. * Write unit, integration, and contract tests. Support the QA team in test automation. * Participate in the technical design of solutions alongside architects and in alignment with the defined architecture. * Collaborate with teams (architecture, QA, SRE, security, business) during refinement, planning, and code reviews, ensuring secure and observable code (logs, tracing, metrics) from inception. * Contribute to technical documentation (services, APIs, key technical decisions). * Analyze incidents/issues in development and QA/certification environments, and act as third-line support for incident analysis and resolution. ##### **Core Requirements** * Solid proficiency and hands-on experience with Java, including concurrency and memory management concepts. * Experience with Spring Boot, ideally across the broader Spring Boot ecosystem (e.g., Spring Cloud and related Spring projects). * Understanding of distributed architecture, communication patterns (synchronous vs. asynchronous), REST APIs, and fault handling (retries, circuit breakers, fallbacks, idempotency, etc.). * Knowledge of geo-distributed, relational, and/or NoSQL databases. * Experience with modern development practices (Git, CI/CD, DevSecOps, code review practices, testing tools such as JUnit, Mockito, Testcontainers). ##### **Preferred Qualifications** * Experience in cloud-native contexts (containers, Docker/Podman, Kubernetes, 12-factor apps) and high-throughput, low-latency systems. * Knowledge of distributed and event-driven architectures. * Familiarity with geo-distributed databases, NoSQL, and NewSQL (e.g., MongoDB, CockroachDB, etc.). * Experience with observability (centralized logging, metrics, distributed tracing) and SRE practices. * Prior experience in payment solutions or mission-critical financial systems. * Knowledge of blockchains and wallets (online and offline). **Employee Benefits:** * Health insurance * Organizational routine flexibility * Continuous training and certifications * Employee Support Program (covering 5 areas, including psychology) * Birthday and tenure gifts * Monthly Happy Hour * Benefits Portal featuring attractive offers