Full Stack Tech Lead - C# / .NET
Posted 3 days 13 hours ago by Square One Resources
Job Title: Full Stack Developer. Location: London. Salary/Rate: £650-£700 a day. Start Date: April. Job Type: Contract - 12 months.
Tech Stack: C#/.NET, React / Next.js, Google Cloud Platform
We are an established technology company building a large-scale platform integrating financial, risk, and payment services, with a focus on delivering robust, scalable solutions for a sustainable future. Our culture is built on technical excellence, collaboration, and continuous improvement.
We are looking for a highly experienced Full Stack Tech Lead to drive the architecture and development of our platform built with C#/.NET, Next.js, and Google Cloud Platform (GCP).
This is a hands-on leadership role (60-75% coding) where you will shape technical direction, mentor developers, and work closely with senior leadership to deliver scalable and maintainable systems.
Responsibilities- Lead architecture and development of C#/.NET backend services and APIs
- Build and optimise Next.js/React applications
- Oversee integrations with financial, risk, and payment APIs
- Guide cloud architecture, deployment, and scaling on GCP
- Mentor developers and conduct code reviews
- Work with Product Owners on technical planning and delivery in Agile
- 7 years software development experience with leadership responsibilities
- Expert in C#/.NET and Next.js/React
- Experience building large-scale platforms
- Strong experience with external API integrations (financial/payment systems)
- Deep knowledge of Google Cloud Platform (GCP)
- Experience with Infrastructure as Code (IaC)
- Experience with large-scale data processing or streaming on GCP
If you're a hands-on technical leader who enjoys building scalable systems and mentoring teams, we'd love to hear from you.
Disclaimer: Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.