Backend Engineer (Python, Flask)

esenda United Kingdom
Remote
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AI Summary

Join Esenda as a Backend Engineer to design, build, and ship reliable backend services and APIs in Python (Flask). You will work on impactful features that directly shape our platform and make a real difference to our customers. This is a full-time opportunity with a competitive salary and benefits package.

Key Highlights
Design, build, and ship reliable backend services and APIs in Python (Flask)
Own features end-to-end: data modelling, 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
Key Responsibilities
Design, build, and ship reliable backend services and APIs in Python (Flask)
Own features end-to-end: data modelling, 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
Technical Skills Required
Python Flask Postgres API design CI/CD pipelines Terraform
Benefits & Perks
£60k salary
Equity
40 days holiday
Pension scheme (3% employer contribution)
Fully remote, UK-based, with 3 in-person meetups per year
Nice to Have
Payments/fintech knowledge
Experience with distributed systems patterns
Security experience

Job Description


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. 
  • You’ll join an on-call rotation (1 week in 4) compensation: paid as an extra £300 per on-call week. 


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. 


Why join us? 

  • £60k salary + equity 
  • 40 days holiday (incl. bank holidays)  
  • Pension scheme (3% employer contribution)  
  • Fully remote, UK-based, with 3 in-person meetups per year 
  • A transparent, collaborative, and supportive culture 


Our stack (today) 

  • 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 


Interview process

  • 30-min intro call (role fit, values, ways of working) 
  • Practical exercise (small take-home or pairing session) 
  • Technical interview (backend fundamentals, API design, production thinking) 
  • Team chat + Q&A 

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