Full Stack Software Engineer (Full-Stack)
Location: London (Hybrid, 4 days per week)
Salary: £80,000 – £105,000 (depending on experience) + equity
About the Role
We’re looking for a Senior Software Engineer to play a key role in scaling a core product with an ambitious, early-stage B2B fintech SaaS company. The team is building a high-performance platform used by enterprise clients in heavy-duty and transactional industries, combining cutting-edge technology with seamless user experience.
This is a hands-on position where you’ll take ownership of critical systems, influence architecture, and help drive technical excellence across the stack. You’ll work closely with product, design, and fellow engineers to build clean, reliable, and scalable systems that underpin financial workflows and payment infrastructure.
What You’ll Bring
* 5+ years of commercial software engineering experience
* Proven experience in SaaS or payment systems
* Strong proficiency in full-stack development using an object-oriented backend language (.NET) and a modern JavaScript framework (ideally React)
* Solid understanding of databases, API design, and web architecture
* Experience with cloud platforms (AWS, Azure, or GCP)
* Strong engineering fundamentals: clean code, testing, CI/CD, version control (Git)
* A proactive, ownership-driven mindset: be able to take initiative and deliver in a fast-paced startup environment
* Excellent collaboration and communication skills
If you’re a driven engineer who thrives on ownership, impact, and elegant solutions — apply today.