Senior Backend Engineer (Hybrid working) in London

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 Senior Software Engineer (Backend) with demonstrable experience in Rust, to help guide 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. Your responsibilities will include delivering a multi-component platform, leveraging your experience in helping to design and develop production-quality systems. This role offers the opportunity for professional growth within a high-performing team culture.

Our work culture at Affinidi is shaped by the following tenets:

• We invest in cultures and teams to enable high performance
• 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.

Key Responsibilities:

• 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.
• Create standards-compliant world-class software systems and components, most of which will be open sourced as our commitment to the OSS and decentralised community.
• Help design and implement solutions to complex, large-scale technical challenges.
• Identify and drive the most critical improvements in product quality, security, and performance.
• Proven experience with performance optimization and a track record of diagnosing and preventing system bottlenecks.
• Deep knowledge of TypeScript/Node.js; Expertise in cloud computing (AWS) and cloud-native environments.
• 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.
• Knowledge of identity, verifiable credentials, or secure data exchange is a strong plus.

Bonus points:

• Experience building systems with advanced cryptography requirements.

We offer a hybrid working model, flexible working hours, an unlimited vacation policy, a competitive compensation package, a mobile allowance, and a home office allowance. We believe in hiring different and diverse talent and providing a safe space where everyone can share their views without fear, where differences are celebrated, and where no one is left out. Inclusive cultures are the foundation for collaboration and innovation within our team.

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