We are looking for a dedicated and experienced Backend-for-Frontend (BFF) Developer to join our mobile app development teams. In this role, you will be responsible for designing and maintaining the BFF layer that powers our native apps. You should bring a strong background in JVM-based languages (Kotlin or Java), a deep understanding of modern architectural patterns, and a passion for building clean, scalable, and maintainable service interfaces tailored specifically for app clients.

You will be joining a remote-first, cross-functional, and dynamic team working with a modern tech stack. We foster a culture of open feedback, shared ownership, and continuous improvement — and you’ll have a real impact on shaping both our technical architecture and engineering culture.

Requirements General (mandatory!)

Seniority: At least 5 years of experience as a professional Software Engineer
Advanced proficiency in at least one JVM language — Kotlin preferred, Java acceptable
Deep understanding of Backend-for-Frontend (BFF) patterns, particularly in the context of native mobile apps
Strong knowledge in designing Microservice architectures and event-driven systems where applicable (yes – this makes sense to include if your BFF interacts with event-based backend systems or aggregates)
Hands-on experience in designing APIs and contracts optimized for mobile app performance and stability
Strong desire and practical ability to apply methodological approaches like Domain-Driven Design (DDD)
Solid experience in central logging and monitoring on cloud infrastructure, ideally with tools like Grafana and Prometheus
Familiarity with modern CI/CD pipelines (e.g., Docker, Kubernetes, GitLab) and production deployments

Additional Skills (Nice to have)

Experience with GraphQL or other API gateways

Familiarity with Clean Architecture principles applied to BFF design

Knowledge of OAuth2/OpenID Connect and secure token handling for mobile clients

Exposure to mobile-specific optimizations (e.g. efficient data serialization, offline caching strategies)

Experience working in SAFe or scaled agile environments

Responsibilities

Design, implement, and maintain the BFF layer that powers our Android and iOS apps
Work closely with frontend mobile developers, product owners, and UX/UI designers to translate business needs into app-optimized backend contracts
Ensure performance, resilience, and scalability of BFF services
Integrate with internal microservices and external partner APIs, aggregating and transforming data where needed
Contribute to and improve logging, observability, and monitoring standards
Build and maintain automated tests (unit, integration, contract)
Participate in code reviews and technical discussions to continuously improve code quality
Drive and contribute to technical documentation and architecture decisions

Expected Deliverables