Our client has an exciting opportunity for a Fractional Fintech Backend Engineer to join the team.
Location: London
Salary: Competitive
Job Type: Fractional, 1–2 days per week
About The Company:
Our client is an early-stage financial technology business building an intelligent platform that combines secure financial processing with advanced data and AI capabilities. Accuracy, auditability and transaction integrity sit at the heart of the product.
The business is now looking for an experienced backend engineer to help create the core financial engine and establish a robust technical foundation for future development and scale.
Fractional Fintech Backend Engineer – The Role:
The Fractional Fintech Backend Engineer will design and build the core ledger and financial processing services using Go. The role will involve creating deterministic, event-sourced systems that ensure financial transactions remain balanced, traceable and safe.
Working directly with the founder and alongside graph, AI and infrastructure specialists, the successful candidate will translate complex accounting requirements into secure, maintainable software and reliable integrations.
Fractional Fintech Backend Engineer – Key Responsibilities:
- Design and build an append-only, event-sourced double-entry ledger using Go
- Develop strict, type-safe validation logic that ensures financial transactions balance before execution
- Create secure, high-performance APIs and microservices for financial data and open banking integrations
- Build reliable processes for idempotency, reconciliation, audit trails and transaction safety
- Manage low-latency communication between backend services, graph databases and AI components
- Establish engineering patterns for security, automated testing, observability, resilience and maintainability
- Work closely with financial and product specialists to convert complex accounting requirements into clear technical solutions
- Provide senior technical guidance while remaining closely involved in hands-on implementation
Fractional Fintech Backend Engineer – You:
- Significant commercial experience de...
Fractional Fintech Backend Engineer employer: Elliot Marsh Head Hunting Partners Careers
Our client is an exceptional employer, offering a unique opportunity for a Technical Director to lead innovation in the cementitious products sector from the comfort of your home in the UK. With a strong focus on employee growth, collaboration, and sustainability, the company fosters a culture that encourages creativity and technical excellence while providing competitive benefits and a high-profile leadership role that directly influences business growth and customer solutions.
Contact Details:
Elliot Marsh Head Hunting Partners Careers Recruitment Team
