Join Esenda as a Senior Backend Engineer to design, build, and ship reliable backend services and APIs in Python (Flask) that power core product functionality. You will own features end-to-end, improve service reliability, and work closely with the technical team to scope product ideas.
Key Highlights
Key Responsibilities
Technical Skills Required
Benefits & Perks
Nice to Have
Job Description
Fully remote, UK-based
£400 – £500 per day (Outside IR35)
3–6 Month Contract
About Esenda
Esenda powers over £1.5bn of inbound and outbound payments annually, in the education space - from tuition and catering fees to supplier payments and payroll.
We’re a revenue-generating startup with strong product-market fit, and we’re growing fast.
Join us now and you’ll work on impactful features that directly shape our platform and make a real difference to our customers.
What you’ll do
- Design, build, and ship reliable backend services and APIs in Python (Flask) that power core product functionality.
- Own features end-to-end: data modelling (Postgres), API design, testing, production rollout and ongoing improvements.
- Help uphold strong engineering standards through thoughtful code reviews, testing discipline, clean architecture, and pragmatic decision-making.
- Improve service reliability and operability: monitoring, alerting, logging, runbooks, and reducing on-call toil over time.
- Work closely with the technical team to scope product ideas, focused on delivering customer-facing outcomes (not just “tickets”).
- Contribute to delivery practices: CI/CD improvements, incremental shipping, and maintaining a high-quality codebase.
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What we’re looking for
- 5+ years experience building and operating production backend systems.
- Strong experience with Python, and hands-on use of Flask (or similar frameworks).
- Solid understanding of Postgres (schemas, migrations, query performance, transactions).
- Experience designing and maintaining APIs (REST; event-driven experience is a plus).
- Comfortable shipping in cloud environments—ideally AWS—and working with modern CI/CD pipelines.
- A strong quality mindset: you care about maintainability, security, reliability, and clear documentation.
Bonus points for
- Payments/fintech knowledge (reconciliation, idempotency, auditability, ledger concepts).
- Experience with distributed systems patterns (queues, background jobs, retries, rate limiting).
- Security experience (threat modelling, OWASP-style concerns, secure API design).
- Familiarity with Terraform.
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Our stack
- Backend: Python, Flask
- Data: Postgres
- Cloud: AWS
- Edge: Cloudflare
- Infrastructure as Code: Terraform
- Delivery: CI/CD, automated testing, observability tooling
How we work
- Pragmatic, high-ownership teams with a bias to shipping
- Clear communication, strong collaboration, and continuous improvement
- Code reviews and sensible standards that keep quality high without slowing delivery
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