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# Senior Software Engineer

- **Company:** Addition Solutions Ltd
- **Location:** Greater London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Microsoft Azure, Bash Shell, Continuous Integration, Data Mining, Python (Programming Language), Machine Learning, Software Engineering, Software Systems, SQL Databases, Systems Integration, User-Centered Design, Backend, Fastapi, SC Clearance, Software Version Control, Data Pipelines, Docker
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840574813-senior-software-engineer

## About the Role

* Strong track record delivering complex software projects end-to-end.
 * Deep expertise in Python Application Development (FastAPI), with a strong SQL capability.
 * Hands-on experience building data pipelines, APIs and backend services.
 * Solid understanding of cloud platforms (Azure/GCP) and Bash scripting.
 * Advanced Docker knowledge, including storage, volumes and permissions.
 * Strong grounding in software engineering principles, version control and CI/CD.
 * Ability to review and improve others' code with a collaborative approach.
 * Excellent communication skills and confidence presenting technical work.
 * Experience mentoring or line-managing technical team members.
 * Eligible for UK security clearance (British citizenship and UK residency for 5+ years).

## Description

* Leading the end-to-end design and build of applications that utilise advanced AI and data-led software solutions.
 * Developing scalable data pipelines and backend services that support complex modelling work.
 * Setting standards for clean, efficient engineering across Python(FastAPI), SQL and cloud environments.
 * Training, tuning and deploying machine learning models into production.
 * Creating processes for robust data extraction, transformation and management.
 * Integrating new solutions with existing systems and ensuring smooth deployment.
 * Producing clear technical documentation and presenting findings to clients.
 * Staying current with emerging technologies and bringing fresh ideas into the team.
 * Contributing to proposals and shaping new project opportunities.
 * Mentoring junior engineers and driving best practice across the engineering team.


## Related Videos

- [Build your backend using FastAPI](https://www.wearedevelopers.com/videos/506-build-your-backend-using-fastapi)
- [Say goodbye to building boring APIs with Azure Data API Builder](https://www.wearedevelopers.com/videos/1194-say-goodbye-to-building-boring-apis-with-azure-data-api-builder)
- [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock)
- [Docker does that? Five Docker capabilities you did not know about](https://www.wearedevelopers.com/videos/100530-docker-does-that-five-docker-capabilities-you-did-not-know-about)
- [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)

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