At a Glance
- Tasks: Own and optimise routing engine, billing infrastructure, and webhook delivery using Python and FastAPI.
- Company: Join a forward-thinking tech company focused on innovation and excellence.
- Benefits: Attractive salary, flexible working options, and opportunities for professional growth.
- Other info: Be part of a dynamic team setting high engineering standards for future hires.
- Why this job: Make a significant impact by building robust systems that handle real money transactions.
- Qualifications: 6+ years in Python services, deep MongoDB expertise, and experience with billing infrastructure.
The predicted salary is between 63000 - 77000 £ per year.
Own the routing engine, billing infrastructure and webhook delivery. Python/FastAPI/MongoDB. We process every inbound lead through code you write — sub-100ms p99 latency, idempotent everything, audit-trail everything.
Who you are
- 6+ years building production Python services — async/await fluent
- Deep MongoDB experience including indexing, aggregation, transactions
- Have built billing or payments infra you're proud of
- Care about correctness — money flows through this code
What you'll own
- Own ping-tree v2 (multi-buyer parallel routing)
- Lead the CRM connector platform (HubSpot/Salesforce/Pipedrive)
- Set the engineering bar for the next 5 hires
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Senior Backend Engineer employer: Connexis Group
Join a forward-thinking company that values innovation and precision in its engineering practices. As a Senior Backend Engineer, you'll be part of a collaborative culture that prioritises employee growth and offers opportunities to lead impactful projects, all while working in a dynamic environment that embraces cutting-edge technologies. With a focus on correctness and efficiency, this role not only allows you to showcase your expertise but also contributes to the seamless flow of critical financial processes.
