Software Engineer, Java (Fintech)

TL;DR

Software Engineer, Java (Identity Platform): Modernizing and scaling core systems for user identity, authentication, and compliance with an accent on decomposing legacy monoliths and migrating critical user-domain services. Focus on building secure authentication infrastructure, audit-ready compliance systems, and ensuring high scalability within a fast-paced fintech environment.

Location: Hybrid in Barcelona, Spain

Company

A leading European investment platform simplifying wealth creation through cryptocurrencies, stocks, and precious metals for over 7 million customers.

What you will do

• Design and develop scalable backend services using Java within an event-driven microservices architecture.
• Lead the migration of critical functionality away from legacy monoliths to modern services.
• Build and optimize systems for identity management, authentication, token validation, and compliance workflows.
• Collaborate with Product, Compliance, Legal, and Security teams to deliver solutions for regulatory requirements.
• Enhance system reliability and observability through clean architecture and automated testing.

Requirements

• Strong backend engineering experience with Java and Spring Boot.
• Proven experience with distributed systems, microservice migrations, and scalable REST APIs.
• Practical knowledge of Postgres and MongoDB.
• Experience with event-driven architectures and message brokers like Apache Kafka, RabbitMQ, or SQS.
• Must be based in or able to work in Barcelona, Spain (Hybrid model).

Nice to have

• Familiarity with CI/CD, Kubernetes, and cloud infrastructure.
• Experience with modern identity or authentication systems.

Culture & Benefits

• Hybrid working model with an additional 25 days per year to work from any city or country.
• Competitive total compensation package including participation in a stock option plan.
• Mental health support through confidential coaching and counseling via OpenUP.
• Continuous growth opportunities with unlimited access to Udemy.
• Gender-neutral new parent leave (8 weeks) and additional wellbeing days off.
• Free onsite dining and snacks for employees in the Barcelona office.