Software jobs in United Kingdom

Affinidi is a technology company dedicated to changing data ownership for good. We empower businesses and individuals with control and ownership of their data, with a comprehensive approach to managing their holistic identity – accounting for all aspects of their digital footprint while ensuring privacy and security.

Affinidi’s technology enables users to benefit from decentralised digital identity solutions. We believe that everyone has the right to own and control their data, and we are committed to creating a trusted digital credentials ecosystem that empowers businesses and individuals to securely exchange data and services across borders and industries.

We are in search of a solution-oriented Staff Software Engineer (Backend) with deep, demonstrable expertise and experience in Rust, to lead the development of secure, scalable, and high-performance backend systems for the Affinidi Elements platform. In this role, you will work with global peers on teams dedicated to areas of the product portfolio, from the product, design, infrastructure, architecture, and back/front-end engineering teams. You will be responsible for the continued enhancement and development of a multi-component platform, where your expert skills in designing, architecting, and building quality systems will intersect with your hands‑on coding, performance testing, and integrating experience.

• We are unapologetically customer-focused
• We invest in cultures and teams to enable high performance
• Embraces experimentation and builds fast
• We have the courage to be misunderstood
• We work together to unlock data

Further, Affinidi’s focus on the open source community, and collaboration with standards bodies to develop the next version of the internet – the Internet of Trust – guides every engineering and product decision we make.

• Build and deliver secure, high‑quality features and improvements for the Affinidi Elements Platform using Rust. Experience in TypeScript and Dart will set you above other applicants for this role
• Design world‑class software systems and components, most of which will be open‑sourced as our commitment to OSS and decentralised community
• Influence architectural direction and long‑term technical strategy while staying hands‑on with development
• Design and implement solutions to complex, large‑scale technical challenges
• Identify and drive the most critical improvements in product quality, security, and performance
• Raise the bar for engineering excellence through mentorship, code reviews, and workshops
• Guide the team to build well‑tested, secure, and performant services
• Establish and refine best practices for high‑scale distributed systems
• Collaborate closely with product, security, and engineering peers in a fast‑paced, iterative environment

• Proven experience with performance optimization and a track record of diagnosing and preventing system bottlenecks
• Strong backend development skills with Rust as a core expertise
• Deep knowledge of TypeScript/Node.js; Dart experience strongly preferred. Familiarity with C# or Go is a plus
• Expertise in cloud computing (AWS) and cloud‑native environments
• Proven track record in designing and deploying distributed systems using modern design patterns
• Skilled in technical documentation (C4 Model, ADRs) and clear communication of architectural decisions
• Strong advocate for privacy by design, security‑first principles, and high‑performance systems
• Expertise in applying asynchronous cryptography in production‑grade products
• Experience with authorization/authentication domains; knowledge of identity, verifiable credentials, or secure data exchange is a strong plus
• Comfortable thriving in autonomous, fast‑moving startup environments and collaborating across global teams
• Experience working across functions, locations, and time zones
• Expertise in decentralised identity solutions
• Experience building systems with advanced cryptography requirements

• Unlimited vacation policy
• Competitive compensation package
• Work within international environment
• Learning Budget

Sounds like you? Apply now!

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