esenda

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. 

 

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. 

 

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

Python

PostgreSQL

Flask

Testing

Continuous Integration

Security software

Cloud

Software Development

Payment systems

Amazon

Data

Web Development

System security

Terraform

FinTech

Communications

Team collaboration

Project documentation

Infrastructure

Cloudflare

CI/CD

Automated Tests

Observability

Python Software Engineer 6 Month Contract (Remote, UK)