BACKEND DEVELOPER

🧠 Profil recherché

Key Responsibilities Design and develop RESTful APIs and microservices using Java and, where applicable, Node.js/TypeScript Write secure, performant code that handles financial transactions, payment processing, and reconciliation workflows Implement authentication and authorisation mechanisms (OAuth2, JWT, API key management) Collaborate with frontend engineers on API contracts and integration Write unit, integration, and contract tests as a standard part of the development workflow Participate in code reviews, architecture discussions, and sprint planning Monitor and maintain services in production, respond to incidents and contribute to post-mortems Document services, data flows and API contracts clearly Required Qualifications & Skills

💼 Expérience

2–4 years of professional backend development experience Strong command of Java 8+ or Java (JDK) and experience with Spring Boot or equivalent frameworks Experience designing and documenting REST APIs Solid understanding of relational databases (PostgreSQL, MySQL) and version control Familiarity with JUnit 5 / Mockito and a test-first mindset Understanding of security fundamentals: JWT, HTTPS, input validation, OWASP Top 10 Secondary – JavaScript / TypeScript Working knowledge of JavaScript/TypeScript sufficient to read, review and contribute to Node.js services Familiarity with Express.js, NestJS or similar backend JS frameworks Comfort with npm/yarn-based project tooling Infrastructure & Tooling Git: branching strategies, pull request workflow, code review etiquette Basic understanding of containerisation (Docker) and CI/CD pipelines Familiarity with cloud infrastructure (AWS, GCP, or Azure) at least at the services level Experience with API documentation tools (Swagger/OpenAPI) Desirable / Nice to Have Prior fintech or payments domain experience (PCI-DSS awareness, ledger systems, reconciliation) Knowledge of message queuing systems such as Kafka or RabbitMQ Experience with microservices patterns: circuit breakers, retries, idempotency Exposure to monitoring and observability tooling (Datadog, Grafana, ELK stack) Familiarity with reactive programming

🛠️ Compétences requises

Takes ownership and follows tasks through to completion without heavy hand-holding Communicates technical concepts clearly to both technical and non-technical stakeholders Comfortable working in a fast-paced, regulated environment where accuracy is critical Proactive about raising blockers, risks, and quality concerns early Collaborative and open to feedback during code reviews Emerging Technologies Demonstrates curiosity and continuous learning in emerging technologies such as AI-assisted development tools Understands how AI-powered services, data analytics, and intelligent workflows can enhance backend systems and financial platforms Security Awareness Strong awareness of modern backend security practices including secure coding, threat modelling, and vulnerability mitigation Familiar with industry practices such as OWASP guidelines, encryption standards, token-based authentication, and secure API design Understands the importance of data protection, compliance, and financial system integrity in regulated environments