Senior Software Engineer B2B FinTech StartUp

Senior Software Engineer - FinTech Startup London Onsite

A high-growth FinTech startup is on a mission to simplify complex financial operations for some of the world's most demanding industries. They're building a powerful platform that helps businesses streamline workflows, automate financial processes, and make smarter, data-driven decisions - and they're now looking for exceptional engineers to help take it to the next level.

You'll be joining a small, ambitious team at a formative stage, working directly on core systems that shape the product's future. Expect autonomy, ownership, and the opportunity to solve technically interesting problems that have real-world impact.

This role would suit someone who's language-agnostic, product-minded, and thrives in a fast-paced startup environment. Whether you come from a background in Python, C#, Go, or JavaScript, what matters most is your ability to build clean, scalable systems and think critically about architecture and design.

You'll be responsible for:

• Building and scaling core platform features
• Collaborating closely with product and design teams
• Owning projects end-to-end, from concept to delivery
• Contributing to architectural decisions and technical direction

You'll bring:

• 5+ years of experience building and shipping software
• Strong fundamentals in software design, APIs, and databases
• Familiarity with cloud platforms (AWS, GCP, or Azure)
• An agile mindset and a genuine interest in building great products
• Experience in FinTech, SaaS, or other data-heavy systems is a plus

What's on offer:

• Competitive salary + meaningful equity
• A collaborative, high-performance culture built on trust and ownership
• The chance to shape a fast-growing startup's product and technology from the ground up

If you're driven by impact, enjoy solving complex technical challenges, and want to help shape the next generation of FinTech innovation - this is the opportunity to do it.