Senior Full-Stack Product Engineer

Harnham - Data & Analytics Recruitment; London; Remote; GBP 90,000 - 110,000; Full time

Job summary

A fast-growing tech company is seeking a Senior Full-Stack Product Engineer to join their remote team. In this role, you will take ownership of features from conception to release, working with React and Rails, and focusing on UX and quality. The ideal candidate has over 5 years' experience in software engineering, strong design skills, and a collaborative mindset. Competitive salary of up to £110,000 and fully remote flexibility offered.

Benefits

Flexible hours

Culture of ownership and creativity

Growth opportunities

Qualifications

• 5+ years' experience as a software engineer.
• Proven experience delivering features in agile environments.
• Strong eye for design and user experience.

Responsibilities

• Owning features from start to finish, collaborating with designers and PMs.
• Developing across the stack: React on the front end, Rails on the back end.
• Ensuring every feature is polished with strong attention to UX.

Skills

JavaScript/React

Back-end development

Agile methodologies

Design and user experience

Excellent communication

Tools

Ruby

AWS/serverless

Job description

Overview

Senior Full-Stack Product Engineer — Remote Working — Up to £110,000 + Benefits

Are you a passionate full-stack engineer who thrives in building end-to-end features that users love? We're partnering with a fast-growing, fully remote tech company on a mission to empower product teams to deliver world-class user experiences - and they're looking for a Senior Full-Stack Product Engineer to join their ambitious team.

Why this role?

• Join a remote-first company where flexibility is at the heart of how they work.
• Be part of a close-knit engineering team (10 engineers in a 50-person company) where your work has a direct impact on tens of thousands of weekly users.
• Take full ownership of features, from concept to release, and feel the pride when users love what you\'ve built.
• Shape not just the product, but also team processes, culture, and the company\'s future growth.

What you\'ll be doing

• Owning features from start to finish - collaborating with designers and PMs, building, testing, and releasing.
• Developing across the stack: React on the front end, Rails on the back end, with AWS infrastructure.
• Ensuring every feature is polished with strong attention to UX and quality.
• Getting involved beyond traditional engineering: support queries, product roadmap discussions, and company-wide process improvements.
• Exploring new ideas with dedicated 10% time and monthly AI Fridays.

What we\'re looking for

• 5+ years\' experience as a software engineer, including JavaScript/React and backend development.
• Proven experience delivering features in agile, fast-paced environments (start-ups/scale-ups a plus).
• A strong eye for design and user experience.
• Proactive, adaptable, and excited by the energy of working in a growing company.
• Excellent communication skills and a collaborative mindset.

Bonus points if you have

• Experience with Ruby or AWS/serverless environments.
• Interest in solving user problems using AI-driven solutions.

What\'s on offer

• Up to £110,000 + benefits.
• Fully remote, flexible hours - fit work around your life.
• A culture of ownership, creativity, and experimentation.
• Growth opportunities - this is the perfect place if you see yourself shaping your own startup in the future.