(Senior) Backend Engineer (f/m/d)

WHO WE ARE 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 at Wire. Together, we'll build a world where privacy and security are the foundation of modern communication. GENERAL INFORMATION 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 YOUR CHALLENGE AT WIRE 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: You develop and maintain backend services in Haskell and actively contribute to the evolution of our existing backend codebase. Architecture & scalability: You contribute to architectural decisions and help make our backend platform more stable, scalable, and maintainable. Feature development: You implement new features in close collaboration with Product, Client Engineering, CoreCrypto, Security, and QA. Service-oriented systems: You work on large-scale service-oriented and federated architectures and bring your experience in designing, implementing, and operating scalable systems. Data architecture & migration: You support the evolution of our data architecture, including the ongoing migration towards PostgreSQL. Technical ownership within your scope: You 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: You build robust, well-tested software and collaborate with QA and engineering teams to continuously improve quality, stability, and security. Knowledge sharing: You 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: You 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. YOUR PROFILE You have proven experience in backend development with Haskell. You bring at least 3 years of experience developing scalable backend systems or distributed services. You have experience with service-oriented architectures and understand how to build robust, maintainable, and scalable backend systems. You work in a structured and independent way and enjoy solving complex technical challenges. You have a good understanding of software architecture, API design, testing, and long-term code maintainability. You are comfortable working in cross-functional teams and enjoy collaborating with Client Engineers, Security, QA, Product, and other Backend Engineers. You can communicate technical decisions clearly and contribute actively to discussions around architecture, implementation, and test strategies. You are interested in secure communication systems, privacy, and modern cryptography, although deep cryptography expertise is 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 is required. German language skills are a plus but not mandatory. WHY WIRE? Join a market-proven (>1,000 customers) company and drive Wire to become the worldwide market leader. Enjoy a yearly education budget of 1000 EUR to strengthen personal capabilities. With an Urban Sports Club subscription, stay balanced and mentally and physically healthy! Work from a beautiful office in the heart of Berlin or choose a mix of working from anywhere vs. spending selected days together in our office to connect on a personal level Enjoy fresh breakfast in the office, daily fruits, snacks, free soft drinks, and the world's best Barista coffee machine. 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. If you are an experienced software engineer with a proven track record of building and scaling mobile applications in a secure environment, we encourage you to apply and join us at Wire CONTACT Have we caught your interest? Apply here! We look forward to hearing from you!​​​​ About us We're building a secure, easy-to-use, and feature-rich communication tool with the latest technologies. We don't just create software — we're also impacting national and international committees. Our research and development occur at our Berlin headquarters and other locations in Europe and the USA, where we embrace diversity and adhere to the strictest data protection standards. We see regulations as a foundation supporting our commitment to secure our customer's communication.