Software Developer, Backend Developer, Software Engineer

Are you a passionate Software Developer looking for a role where you can make a genuine impact, work across modern technologies, and progress your career within a growing IT function?

ISS UK is looking for a talented Software Developer to join their UK IT Department, supporting the development, maintenance, and enhancement of business‑critical applications and APIs used across the organisation.

This is an exciting opportunity to work in a collaborative environment with exposure to stakeholders across the business, contributing to scalable software solutions while continuously developing your technical expertise.

• Developing and maintaining applications, APIs, and business logic solutions
• Supporting web, desktop, and mobile applications across the business
• Analysing business requirements and translating them into technical solutions
• Integrating data from multiple back-end services and databases
• Supporting software upgrades, debugging, fault finding, and configuration control
• Creating technical specifications, documentation, and test plans
• Collaborating closely with developers, management, and wider business teams

• Strong experience with C#, .NET / .NET Core / .NET Framework
• Experience developing and working with REST APIs
• Good SQL skills with SQL Server and Oracle
• Experience supporting and developing scalable applications
• Excellent communication and problem‑solving skills
• A genuine passion for technology and emerging tech trends
• Clear progression and long‑term development opportunities
• Exposure to enterprise‑scale systems and projects
• Hybrid working flexibility
• Collaborative and supportive team culture
• Opportunity to work across multiple technologies and business areas
• A role where your ideas and technical input are genuinely valued

This role would suit someone with around 3–5+ years of development experience who enjoys ownership, problem‑solving, and building high‑quality software solutions in a fast‑paced environment.