Full Stack Engineer | C#, .NET, React

JR United Kingdom; Basingstoke; On-site; GBP 85,000 - 100,000; Full time

Job summary

A leading early-stage SaaS start-up seeks a Full Stack Software Engineer to join their innovative team in London. You will collaborate with experienced founders to rebuild a legacy industry, participating in significant product development and commercial strategy decisions. This role offers strong growth potential and competitive compensation, making it a perfect opportunity for passionate engineers excited by the startup landscape.

Qualifications

• 3+ years' experience as a Full Stack Software Engineer.
• Strong skills across C#, .NET, and React.
• Experience in FinTech or B2B SaaS is a plus.

Responsibilities

• Develop real features across frontend and backend.
• Involved in commercial decisions, product strategy, and user interactions.
• Work closely with founders on shaping the product and business.

Skills

C#

.NET

React

Azure

Job description

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Client:

Wilson Brown

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Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

07.06.2025

Expiry Date:

22.07.2025

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Job Description:

Full Stack Software Engineer

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

I’m hiring a Full Stack Software Engineer to join one of the most ambitious, talented, and genuinely brilliant teams I’ve worked with. This is a rare opportunity to work directly with proven founders on an early-stage product with huge potential. They're rebuilding the infrastructure of a legacy industry from the ground up - no silos, no red tape.

? Location: London

? Working Policy: Onsite full-time - it's early stage, and the team gets massive value from in-person collaboration

? Salary: Up to £100,000 (depending on experience) + meaningful equity - it's a brilliant time to join

? Interview Process: 3 stages. We keep things fast, focused, and respectful of your time.

You'll be a Full Stack Software Engineer in a small, fast-paced team, working across frontend and backend to ship real features using C#, .NET, React, and Azure. You must be confident across the stack - this role offers real autonomy and end-to-end ownership.

This isn’t just an engineering role. You’ll be actively involved in commercial decisions, product strategy, and user conversations - not just handed tickets.

• Mid–Senior Full Stack Software Engineers — while we don’t fixate on years, 3+ years' experience is typically what we'd expect. We need engineers to hit the ground running.
• Strong across C#, .NET, and React
• Passionate about building great products users actually love. Experience in FinTech or B2B SaaS would be highly advantageous but by no means an essential.
• Excited by early-stage, in-office startup life
• Hungry to build something with lasting impact

You’ll work closely with founders, shaping both product and business from the inside. If you're a Full Stack Software Engineer who wants real ownership, fast learning, and to build with C#, .NET, React, and Azure - apply now.