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# Senior Software Engineer - C# / Java

- **Company:** Threecolts
- **Location:** Bristol, UK (Remote available)
- **Experience:** Expert
- **Salary:** £90,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, C Sharp (Programming Language), Cloud Computing, Code Review, Databases, Software Debugging, DevOps, Software Engineering, Backend, Git, Restful APIs
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840625040-senior-software-engineer-c--java

## About the Role

* 5-8+ years of professional software engineering experience
 * Strong proficiency in C# and Java
 * Experience building and maintaining backend services, APIs, and scalable application components
 * Solid understanding of REST APIs, system design, and scalable application patterns
 * Experience working with SQL databases and data modelling
 * Familiarity with cloud infrastructure, ideally AWS
 * Experience debugging production systems and resolving issues independently
 * Comfortable working with Git, code reviews, and team-based development
 * Ability to work across an existing codebase and improve quality without over-engineering

## Description

* You'll take ownership of features across Inventory Lab's C# and Java-based systems, delivering them from initial design through to production. You'll design and build clean, scalable services, APIs, and components that are maintainable, well-tested, and performant.
 * You'll operate independently within a defined scope, making sound technical decisions and balancing speed with long-term quality. You'll play an active role in improving the systems you work on, debugging production issues, identifying root causes, and implementing durable fixes.
 * You'll contribute to technical discussions, help evolve architecture within your domain, and raise the bar through thoughtful code reviews. Collaboration is key: you'll work closely with Product, QA, and DevOps to build features and improvements that deliver meaningful value to Inventory Lab customers.


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