> Markdown version of [/jobs/ext/3147717-senior-backend-engineer-platform-integrations](https://www.wearedevelopers.com/jobs/ext/3147717-senior-backend-engineer-platform-integrations). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Backend Engineer, Platform & Integrations

- **Company:** Bjak
- **Location:** London, UK (Remote available)
- **Experience:** Expert
- **Salary:** £54,986.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Audit Trail, Microsoft Azure, Cloud Computing, Databases, Continuous Integration, Customer Data Management, Relational Databases, Key Management, PostgreSQL, MongoDB, Node.Js, Redis, Systems Integration, TypeScript, Backend, Non-relational Database, Web Api
- **Published:** September 1, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5862297824

## About the Role

* Strong backend development in Node.js / TypeScript (or very close equivalent, e.g. willing/able to work in it)
 * Experience in relational database (PostgreSQL or similar) or non relational database (MongoDB or similar) - not just querying, but designing the schema
 * Experience integrating with third-party APIs, especially handling timeouts, retries, and partial failures gracefully
 * Experience with cloud infrastructure (AWS, GCP, or Azure) and CI/CD pipelines
 * Comfortable working with sensitive customer data and security best practices (encryption, access control)

 * Experience in fintech, insurtech, or another regulated industry
 * Experience building a "plugin" or "adapter" style system that needs to support many different external integrations over time
 * Experience with Redis or similar for session/cache management

This role is remote, but candidates must be based in UK. We are hiring specifically for this market, so applicants should already be based in UK.

English is our main working language across global teams. Strong English communication is required.

## Description

We are looking for backend engineers to build the core systems behind BJAK's AI Finance Agent.

This role is for engineers who can build reliable APIs, workflows and financial product infrastructure that can scale across markets, partners and millions of users.

 * Build the system that connects to multiple insurance providers and requests quotes from all of them at once
 * Design how those quotes get compared fairly and ranked for the customer
 * Build the customer database and the secure audit trail required
 * Set up cloud hosting, CI/CD pipeline, observability and security (encryption, secrets management)


## Related Videos

- [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock)
- [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis)
- [Web APIs you might not know about](https://www.wearedevelopers.com/videos/281-web-apis-you-might-not-know-about)
- [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner)
- [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape)
- [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean)

## Related Articles

- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)
- [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk)
- [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk)
- [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)
- [The Best Job Search Websites of 2025](https://www.wearedevelopers.com/magazine/368-the-best-job-search-websites-of-2025)