Hybrid Mid-Level Software Engineer - AI, AWS & .NET

Addition; Leeds; Hybrid; GBP 38,000 - 43,000; Full time

Benefits offered by this job

Hybrid work (Leeds)

Pension scheme

25 days annual leave

Personal development budget

Job summary

Addition in Leeds is hiring a Mid-Level Software Engineer to join a growing Cyber Security SaaS business. You’ll split time between backend .NET and frontend React, building features and scalable cloud APIs in AWS.

The role emphasizes collaboration, AI-assisted development with Claude, and contributing across the full development lifecycle. You’ll work in a hybrid setup (2 days in the office), with a package of £38,000-£43,000 per annum, Pension, 25 days leave, and a personal development budget

Qualifications

• 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.

Responsibilities

• 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.

Skills

Team collaboration

Full-stack

Problem solving

Communication

Tools

NET

React

AWS

PostgreSQL

SQL Server

Job description

Addition in Leeds is hiring a Mid-Level Software Engineer to join a growing Cyber Security SaaS business. You’ll split time between backend .NET and frontend React, building features and scalable cloud APIs in AWS.

The role emphasizes collaboration, AI-assisted development with Claude, and contributing across the full development lifecycle. You’ll work in a hybrid setup (2 days in the office), with a package of £38,000-£43,000 per annum, Pension, 25 days leave, and a personal development budget