At a Glance
- Tasks: Design and build core financial systems using Go for an innovative fintech platform.
- Company: Early-stage fintech company focused on secure financial processing and AI capabilities.
- Benefits: Competitive pay for 1-2 days a week, flexible working arrangements, and impactful role.
- Other info: Opportunity for hands-on engineering and architectural ownership in a growing startup.
- Why this job: Join a dynamic team to shape the future of finance with cutting-edge technology.
- Qualifications: Experience in backend development with Go and strong fintech knowledge required.
The predicted salary is between 63000 - 77000 £ per year.
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.
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.
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
You:
- Significant commercial experience developing concurrent, high-throughput backend services using Go
- Strong fintech experience gained within banking, payments, open banking, accounting software or another transaction-intensive environment
- Thorough knowledge of event sourcing, double-entry ledger concepts, idempotency, reconciliation and transaction safety
- Excellent API, database, distributed systems and automated testing fundamentals
- Strong understanding of security, data protection and auditability when handling sensitive financial information
- Comfortable working with ambiguity, taking ownership of architectural decisions and explaining complex technical issues clearly
- Experience with PostgreSQL, Neo4j, GCP, Moneyhub or similar financial data integrations would be advantageous
Benefits:
- Competitive remuneration for a fractional commitment of 1–2 days per week
- Opportunity to build the core financial engine of an innovative early-stage platform
- Flexible working arrangements with London listed as the role location
- A high-impact role combining architectural ownership with hands-on engineering
To submit your CV for this exciting opportunity, please click ‘Apply’ now!
Fractional Fintech Backend Engineer in London 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
StudySmarter Expert Advice🤫
We think this is how you could land Fractional Fintech Backend Engineer in London
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We think you need these skills to ace Fractional Fintech Backend Engineer in London
Some tips for your application 🫡
Showcase Your GitHub Projects:When applying for a freelance software engineering gig at Elliot Marsh Head Hunting Partners Careers, make sure to include your GitHub link in your application. Highlighting your code repositories, contributions to Open Source, and any personal projects can really set you apart and give us insight into your skills and coding style.
Tailor Your CV with Relevant Skills:In software development, the specifics matter! Make sure your CV lists the programming languages and technologies you excel at. Focus on the ones that align with the projects Elliot Marsh Head Hunting Partners Careers is working on. Listing your tech stack clearly will help us understand how you fit into our team.
Include a Portfolio of Your Work:A solid portfolio is a must when applying for freelance roles. Include links to any apps, websites, or software you've developed. Highlight any projects that reflect a strong user experience, efficiency, or innovative solutions—this is your chance to shine and show us what you can bring to the table!
Mention Your Availability and Rates:Since this is a freelance role, we want to know when you’re available and what your rates are like! Be upfront about your typical work hours and project timelines. This transparency will help us see if we can sync up for future projects at Elliot Marsh Head Hunting Partners Careers.
How to prepare for a job interview at Elliot Marsh Head Hunting Partners Careers
✨Showcase Your Code Wizardry
Since you're going for a freelance role in software engineering, have a solid portfolio ready to flaunt your best work. Include projects that highlight your coding skills, frameworks you excel in, and any problem-solving feats you've pulled off. This is your chance to shine, so choose pieces that reflect your unique style and expertise!
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