Senior Java Developer

Join us as a Senior Java Developer

Build high-performance systems for real-time trading

We are looking for a Senior Java Developer to contribute to the design, development, and maintenance of our high-performance trading software solutions in Porto. You will build reliable, scalable, and low-latency backend systems that power mission-critical trading operations for banks, brokers, and funds.

This role requires strong autonomy, accountability, and a clear commitment to product quality and client success, while actively contributing to a culture of excellence, collaboration, and continuous improvement.

Hybrid working model: 4 days per week in the office.

Why this role is exciting

• Build high-performance backend systems for real-time trading platforms
• Work on low-latency, data-intensive applications in mission-critical environments
• Be part of a collaborative team where senior engineers have real influence
• Contribute to system architecture, performance optimization, and product evolution
• Mentor others while continuing to grow technical

Key Responsibilities

Software Design & Development

• Design, develop, implement, test, and maintain efficient and reliable Java backend components and UIs
• Build scalable, high-availability trading software using Java, Spring, Spring Boot, JPA/Hibernate, and REST APIs
• Ensure system reliability, performance, and efficiency under high-load and low-latency conditions
• Apply best practices for code quality, testing, and performance optimization
• Participate actively in architectural discussions, aligning technical solutions with business goals
• Maintain product quality and consistency across releases

Quality, Accountability & Compliance

• Deliver production-ready code within agreed timelines and quality standards
• Design and execute automated unit, integration, and performance tests
• Proactively identify and resolve bottlenecks, defects, and performance issues
• Take full ownership of deliverables, ensuring compliance with internal procedures, client requirements, and regulatory standards
• Write, maintain, and update clear and accurate technical documentation aligned with product releases
• Maintain strict confidentiality of source code, client information, and proprietary data
• Provide regular updates and report activities to management

Collaboration & Client Success

• Work closely with Business Analysts to translate functional requirements into effective technical solutions
• Prototype solutions when required
• Support QA and DevOps teams to ensure smooth deployment and reliable production performance
• Contribute to customer satisfaction by delivering robust, maintainable, and scalable systems
• Act as a proactive partner in achieving long-term client success

Leadership, Mentorship & Continuous Improvement

• Mentor and guide junior developers, promoting autonomy, accountability, and technical excellence
• Encourage knowledge sharing, code reviews, and team collaboration
• Stay current with advancements in Java and trading technology
• Stay updated on financial markets, trading workflows, and relevant technologies
• Contribute to process improvement initiatives and the evolution of best practices across the development lifecycle
• Proactively identify opportunities to improve system performance and scalability

Profile & Qualifications

Technical Skills

• BSc in Computer Science, Engineering, or a relevant field
• Minimum 5 years of experience in Java backend development, preferably in trading or financial software
• Proven expertise in Java, Spring, Spring Boot, JPA/Hibernate, and REST APIs
• Excellent programming skills, with the ability to produce technical documentation in a clear and meaningful way
• Deep knowledge of development best practices (Agile methodology and Atlassian suite: Bitbucket, Jira, Confluence) and industry-standard libraries (stdlib)
• Strong expertise in multi-threaded, high-performance, and network programming (TCP sockets)
• Solid understanding of Linux environments, cloud deployment, Version Control Systems, and CI/CD tools (Git, Jenkins)
• Full autonomy in using debugging and profiling tools
• Knowledge of messaging systems (Kafka, RabbitMQ) and databases (SQL, NoSQL)
• Familiarity with containerization and orchestration tools (Docker, Kubernetes)
• Familiarity with serialization frameworks
• Experience with financial systems, trading workflows, or market data is a plus

Soft Skills & Mindset

• High level of accountability, autonomy, and efficiency
• Strong analytical and problem-solving skills
• Excellent communication and teamwork abilities, with a client-first mindset
• Commitment to product quality, confidentiality, and continuous learning

Languages

• Fluency in English (both written and spoken)

Apply by submitting a CV in English.