Build the Future of Workplace Collaboration at Thomas
At Thomas, we’re redefining how teams connect and collaborate. Our AI-driven platform, Thomas Connect, delivers deep behavioural insights that help teams work smarter, not harder.
We're looking for a Senior Software Engineer to help us build scalable, high-performance applications that transform the modern workplace. If you're excited about solving complex problems, working with cutting-edge tech, and driving innovation in a fast-paced SaaS environment, read on.
Is This Role Right for You?
We’re not just building software, we’re revolutionising how teams collaborate. As a Senior Software Engineer, you'll play a key role in shaping our AI-powered platform, Thomas Connect, helping to build modern, scalable web experiences that drive real business impact.
We’re looking for someone who is analytical, innovative, and collaborative, with a passion for high-quality software, strong engineering principles, and methodical problem-solving. If you enjoy the balance between engineering excellence and elegant design, this is the role for you.
What You’ll Do
* Develop & scale modern web applications using C#, .NET Core, CosmosDB, Redis
* Design, build, and refine RESTful APIs to enable seamless data integration
* Create engaging, high-performance frontend experiences using React, JavaScript, HTML, and CSS
* Influence system architecture, contributing to design discussions and proposing innovative solutions
* Lead and participate in code reviews, promoting best practices and high engineering standards
* Collaborate with UX Designers, Product Managers, and Engineers to deliver impactful new features
* Optimize automated testing using tools like Jest, Playwright, and Vitest
* Mentor and support junior engineers, fostering a culture of learning and collaboration
* Continuously improve software quality, security, and performance
What We’re Looking For
Must-Have Experience:
Strong C# skills with .NET Core and cloud-based backend technologies (CosmosDB, Redis)
Expertise in JavaScript, React, and modern frontend technologies
Experience building RESTful APIs and responsive, mobile-first web applications
Deep understanding of asynchronous JavaScript and core browser concepts
Experience with test automation tools (Jest, Playwright, Vitest)
Agile mindset – comfortable working in fast-paced, iterative development cycles
Nice-to-Have Skills (Bonus!):
Experience working with Docker, Kubernetes, Microsoft Azure, or AWS
Familiarity with microservices architecture
Join us and help shape the future of workplace collaboration. Apply now to be part of our journey!
Location: This role is based in the UK and aligned with our Marlow office.
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