Senior Backend Engineer; f​/m​/d

Join Wire, the leading end‑to‑end encrypted communication platform revolutionizing secure collaboration for businesses, critical infrastructure, and governments. We prioritize privacy as a fundamental right, providing organizations across industries with the most secure communication experience possible. Our cutting‑edge encryption technology and robust security measures have made us a trusted partner in the technology, finance, healthcare, and government sectors. If you're driven by the mission to redefine secure communication and want to be part of an innovative and dynamic team, join us ether, we’ll build a world where privacy and security are the foundation of modern communication.

• Employment type:
  
  Permanent
• Experience:
  
  Minimum 3 years of experience developing scalable backend systems
• Working hours:
  
  Full‑time
• Location:
  
  Remote in Germany or Europe, hybrid possible from our Berlin office
• Reports to:
  
  Engineering Manager Backend
• Start date:
  
  ASAP

As a Backend Software Engineer on our Haskell team, you will build and maintain core services for the Wire platform, improving scalability, reliability, and security while collaborating across teams; we’re looking for a proactive engineer with strong Haskell skills who enjoys solving complex backend challenges.

• Backend development with Haskell: develop and maintain backend services in Haskell and actively contribute to the evolution of our existing backend codebase.
• Architecture & scalability: contribute to architectural decisions and help make our backend platform more stable, scalable, and maintainable.
• Feature development: implement new features in close collaboration with Product, Client Engineering, Core Crypto, Security, and QA.
• Service‑oriented systems: work on large‑scale service‑oriented and federated architectures, bringing your experience in designing, implementing, and operating scalable systems.
• Data architecture & migration: support the evolution of our data architecture, including the ongoing migration towards PostgreSQL.
• Technical ownership within your scope: take responsibility for backend topics within your feature scope and ensure that architecture, implementation approaches, and test strategies are aligned between the scope and the backend team.
• Quality & testing: build robust, well‑tested software and collaborate with QA and engineering teams to continuously improve quality, stability, and security.
• Knowledge sharing: build deep knowledge of your technical scope, share this knowledge regularly with the backend team, and contribute to a strong engineering culture.
• Security by design: work on software where security, privacy, and reliability are core requirements and help establish Wire as the most secure messaging solution for large groups, governments, and enterprises.

• Proven experience in backend development with Haskell.
• At least 3 years of experience developing scalable backend systems or distributed services.
• Experience with service‑oriented architectures and understanding how to build robust, maintainable, and scalable backend systems.
• Structured and independent way of working, enjoying solving complex technical challenges.
• Good understanding of software architecture, API design, testing, and long‑term code maintainability.
• Comfortable working in cross‑functional teams and collaborating with Client Engineers, Security, QA, Product, and other Backend Engineers.
• Clear communication of technical decisions, active contribution to discussions around architecture, implementation, and test strategies.
• Interest in secure communication systems, privacy, and modern cryptography (deep cryptography expertise not required).
• Experience with Servant, Polysemy, or comparable Haskell libraries is a plus.
• Experience with PostgreSQL or database migrations is an advantage.
• Experience with federated systems is a plus.
• Experience with additional programming languages such as Rust or Go is also a plus.
• Fluent English required;
  German language skills a plus but not mandatory.

• Join a market‑proven (>1,000 customers) company and drive Wire to become the worldwide market leader.
• Yearly education budget of 1,000 EUR to strengthen personal capabilities.
• Urban Sports Club subscription to support mental and physical health.
• Work from a beautiful office in the heart of Berlin or choose a mix of working from anywhere versus selected days in the office.
• Enjoy fresh breakfast, daily fruits, snacks, free soft drinks, and the world’s best Barista coffee machine in the office.
• Wire is an equal‑opportunity employer and does not discriminate on the grounds of gender, civil status, family status, sexual orientation, religion, age, disability or race.