Full Stack Engineer | C#, .NET, React

JR United Kingdom; Crawley; On-site; GBP 70,000 - 100,000; Full time

Job summary

A leading company in the SaaS space is seeking a Full Stack Software Engineer to join their team in London. This role offers significant ownership over both product and business decisions, ideal for those passionate about impacting an early-stage startup. Candidates should have experience in C#, .NET, and React, with enthusiasm for developing engaging user-centric solutions.

Qualifications

• Strong proficiency in C#, .NET, and React.
• 3+ years of experience as a Full Stack Software Engineer.
• Passionate about building impactful products.

Responsibilities

• Work across frontend and backend using C#, .NET, React, and Azure.
• Participate in product decisions and engage with users.
• Collaborate closely with founders to shape product and business.

Skills

C#

.NET

React

Job description

Full Stack Software Engineer

SaaS | Early-Stage Start-Up | Experienced Founders | C# | .NET | TypeScript | React | Azure

We are hiring a Full Stack Software Engineer to join a talented and ambitious team working on an early-stage product with significant potential. The team is rebuilding infrastructure in a legacy industry from the ground up, emphasizing collaboration and innovation.

Location: London

Working Policy: Onsite full-time, as in-person collaboration is highly valued at this stage.

Salary: Up to £100,000 (depending on experience) plus meaningful equity.

Interview Process: 3 stages, designed to be fast, focused, and respectful of your time.

You will be a Full Stack Software Engineer working across frontend and backend, using C#, .NET, React, and Azure. The role requires confidence across the entire stack, offering autonomy and end-to-end ownership.

This position involves active participation in product decisions, strategy, and user engagement, rather than just executing tasks.

• Mid–Senior Full Stack Software Engineers with 3+ years of experience who can hit the ground running.
• Strong skills in C#, .NET, and React.
• Passionate about building products that users love. Experience in FinTech or B2B SaaS is a plus but not essential.
• Enthusiastic about early-stage startup life.
• Motivated to create impactful solutions.

Work closely with founders to shape both product and business. If you're a Full Stack Software Engineer seeking ownership, fast learning, and experience with C#, .NET, React, and Azure, apply now.