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# Mid-Level Software Engineer

- **Company:** Addition Solutions Ltd
- **Location:** Leeds, UK
- **Experience:** Experienced
- **Salary:** £38,000.0 - £43,000.0
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Amazon Web Services, Software as a Service, Cloud Computing, Code Review, Relational Databases, PostgreSQL, Microsoft SQL Server, Software Engineering, ReactJS, Backend, Information Technology, Front End Software Development
- **Published:** September 8, 2026
- **Apply:** https://www.reed.co.uk/jobs/mid-level-software-engineer/57321291

## About the Role

* Minimum of 2 years experience in Software Engineering.
 * Commercial experience with .NET, ideally within backend services or APIs.
 * Experience with React and a willingness to contribute across the full stack.
 * Exposure to AWS or another major cloud environment; strong AWS experience would be a significant advantage.
 * Experience working with relational databases such as PostgreSQL or SQL Server.
 * Previous experience developing SaaS products as part of a multi-person engineering team.
 * Understanding of Agile development practices and the wider software development lifecycle.
 * Comfortable working across both new feature development and existing platform improvements.
 * An interest or experience in AI-assisted software development and openness to adopting new tools and technologies.
 * Strong problem-solving and communication skills, with the ability to work collaboratively rather than in isolation.
 * A Computer Science degree would be beneficial, but isn't essential.

## Description

* Working across a full-stack environment, with roughly a 60/40 split between backend .NET development and frontend React.
 * Building new product functionality while improving and maintaining an established SaaS platform.
 * Developing scalable APIs, services and cloud-based solutions within an AWS environment.
 * Working with modern versions of .NET, alongside React, PostgreSQL and Microsoft SQL Server.
 * Getting involved across the development lifecycle, from solution design and coding through to deployment and operations.
 * Collaborating closely with other engineers through pairing, code reviews and technical discussions.
 * Helping the team increase its focus on new product development by improving processes and reducing maintenance overhead.
 * Using AI-assisted development tools, with Claude currently the team's primary choice, to make development more efficient and the codebase easier to work with.
 * Working closely with product and wider teams to turn customer and business requirements into practical technical solutions.
 * Playing a part in strengthening the internal engineering function as the business continues to scale.


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