Referment is working with a London-based B2B fintech SaaS company that builds an order-to-cash platform for enterprise finance teams, covering collections, payments and reconciliation. They are hiring a Senior Backend Developer to design and build the backend systems that power the product. The role is fully remote — the company hires worldwide — with an office in central London available if you prefer it.

The Role You will work on business-critical operations: designing robust backends, modelling complex business processes into elegant data structures, building reliable integrations between modern and legacy systems, and developing powerful APIs that connect disparate business systems. The platform handles payments and financial data, so secure, scalable, maintainable solutions are the standard, and long-term reliability is valued over quick fixes.

The engineering culture suits developers who like to think. You will get protected time for complex challenges, a regular and predictable schedule, and a team of self-motivated engineers who take pride in systematic, well-structured work. Communication is largely written — they prefer clear emails to meetings.

What We’re Looking For

• Five or more years programming in Python and/or two or more years working with Django
• Django framework expertise; Django REST Framework and AWS experience are helpful and can be learned on the job
• Experience building and maintaining large-scale applications
• Excellent database design and optimisation, including complex data modelling and migrations
• Understanding of APIs and web services
• A portfolio showing systematic, well-structured work
• Clear written communication

Their core stack is Django REST Framework, PostgreSQL and AWS Lambda, supported by libraries such as Pandas and OAuthlib, with a strong pytest testing culture.

This could suit… a senior Python/Django engineer who values craft, autonomy and a calm, focused working environment, and who enjoys understanding the business problem properly before crafting the solution.

Referment