Senior Software Engineer

Job description

Overview

We are a well-established company with over 25 years in our industry, now entering a new phase of technical growth. We are looking for a Senior Software Engineer to strengthen our engineering capability and support the evolution of our core systems.

This is a hands-on role across the stack in a small, highly capable team, working closely with the Technical Lead to maintain, improve, and modernise a mature, production-critical platform.

The Role

Our systems are business-critical, designed for performance, reliability, and scalability. You’ll be balancing maintenance, new development, and modernisation, making a real impact on the platform every day.

You will:

• Own key systems and features end-to-end
• Work across multiple codebases and technologies
• Modernise existing platforms without breaking them
• Contribute to architectural decisions and technical direction
• Balance building new features with improving existing systems

What You’ll Do

Here’s where your skills will shine:

• Core Systems: Maintain and evolve production systems, modernise legacy components, and support the transition from monolithic to distributed architecture
• Backend & APIs: Build and maintain high-performance services using C#/.NET and Python
• Databases: Work with relational and NoSQL databases, optimising SQL queries for performance and reliability
• Embedded & Device Software: Develop practical device software with C, C++, Python, and shell scripting
• Testing & Quality: Write unit and integration tests to ensure system reliability
• Operations & Reliability: Support deployments, monitor system health, and contribute to smooth day-to-day operation using tools such as Grafana

Technology Stack

• Applications & APIs: C#/.NET (4.7, 8, 9), Python, SQL Server, MongoDB, JS/TS, WinForms
• Embedded & Devices: C, C++, Python, C for microcontrollers, shell scripting
• Cloud & Infrastructure: Google Cloud, Microsoft Azure, Docker, Linux

You don’t need to be an expert in everything — this reflects a long-lived, evolving platform.

Skills & Experience

Essential:

• Strong experience building and maintaining production software
• Commercial experience with C#/.NET
• SQL and relational database knowledge
• Comfortable across existing codebases and legacy systems
• Independent, collaborative, and pragmatic

Desirable:

• Python in production
• C/C++ commercial or systems experience
• Embedded/device software development
• Docker, cloud platforms, networking fundamentals
• JS/TS and modern web frameworks (Angular, React)
• IoT or hardware-integrated systems

Why Join Us

• Influence architecture and long-term technical direction of a proven product
• Work closely with senior technical leadership on real-world systems
• Enjoy autonomy, trust, and responsibility
• Play a key role in the next phase of technical evolution

Extra information

Status

Open

Education Level

Secondary School

Location

West Yorkshire

Type of Contract

Full-time jobs

Published at

13-02-2026

Profession type

ICT

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English