Senior Product Engineer

YNH; Greater London; Hybrid; GBP 110,000 - 140,000; Full time

Job summary

YNH is seeking a Senior Product Engineer to own substantial features across the stack, from early discussions to production. You’ll tackle real-time data, complex integrations and developer-facing APIs within a growing B2B SaaS platform.

You’ll collaborate across frontend and backend, influence architecture, and ship end-to-end solutions in a small team. The role offers equity, with remote or hybrid work in London & Manchester.

Qualifications

• Strong experience building and shipping production software, ideally within B2B SaaS.
• Excellent backend engineering fundamentals and the ability to work across the product stack.
• Experience designing APIs, integrations and scalable software systems.
• An understanding of distributed systems, reliability and performance.
• Strong product instincts and an interest in understanding the people using your software.
• Comfortable taking ownership and making technical decisions without layers of management.

Responsibilities

• Build customer-facing features across the stack for complex financial operations.
• Design scalable backend services, APIs and integrations.
• Collaborate across frontend and backend to deliver complete product experiences.
• Tackle real-time data processing, performance and distributed systems challenges.
• Create intuitive interfaces for complex workflows and large datasets.
• Work with product, design and customers to translate problems into elegant software.
• Influence architecture and engineering decisions as the platform grows.
• Take end-to-end ownership of what you ship.

Skills

Backend engineering

APIs design

Distributed systems

Ownership

B2B SaaS domain knowledge

Job description

£120k+ | Equity | Fully Remote or Hybrid work in the London & Manchester offices

The Company

We're working with a venture-backed B2B SaaS company building a modern financial operations platform for businesses managing complex, high-volume transactions.

Despite billions moving through financial systems every day, many businesses still rely on fragmented software, spreadsheets and manual processes to reconcile payments, investigate discrepancies and manage operational workflows.

This company is changing that.

Their platform connects financial data across multiple systems, automates complex workflows and gives businesses a real-time view of their operations.

Think high-volume transaction processing, intelligent reconciliation, complex integrations and intuitive interfaces that turn messy financial data into something businesses can actually work with.

The business has an established product, a growing customer base and a small, highly capable engineering team. They're now entering their next phase of growth, with plenty of interesting technical challenges still to solve.

The Role

They're hiring a Senior Product Engineer who wants more than a backlog of tickets.

You'll work across the stack, taking ownership of substantial product features from early discussions through to production.

Engineers are closely involved in deciding what gets built, how it works and whether it genuinely solves the problem.

You'll be working on challenges involving real-time data, complex integrations, developer-facing APIs and the architecture needed to support a growing SaaS platform.

What You'll Be Doing

• Building customer-facing features used by businesses managing complex financial operations.
• Designing scalable backend services, APIs and integrations.
• Working across frontend and backend engineering to deliver complete product experiences.
• Solving challenges involving real-time data processing, performance and distributed systems.
• Building intuitive interfaces for complex operational workflows and large datasets.
• Working closely with product, design and customers to turn difficult problems into elegant software.
• Influencing technical architecture and engineering decisions as the platform grows.
• Taking genuine end-to-end ownership of what you ship.

What We're Looking For

• Strong experience building and shipping production software, ideally within B2B SaaS.
• Excellent backend engineering fundamentals and the ability to work across the product stack.
• Experience designing APIs, integrations and scalable software systems.
• An understanding of distributed systems, reliability and performance.
• Strong product instincts and an interest in understanding the people using your software.
• Comfortable taking ownership and making technical decisions without layers of management.

We're not looking for engineers who simply know a particular framework. We're interested in people who understand how to build excellent software products.

Why It's Interesting

• Real engineering ownership. You'll influence both the product and the technical decisions behind it.
• Interesting technical problems. Complex integrations, real-time data, APIs and scalable architecture rather than another straightforward CRUD application.
• Small team, meaningful impact. You'll work closely with experienced engineers and see the direct impact of what you build.
• A product with momentum. Established customers, venture backing and an opportunity to help shape the next stage of growth.