Senior Full-Stack Product Engineer

Harnham - Data & Analytics Recruitment; City Of London; Remote; GBP 93,000 - 110,000; Full time

Job summary

A fast-growing tech company seeks a Senior Full-Stack Product Engineer to build end-to-end features. The role offers full ownership of features and an inclusive remote-first environment. Candidates should have over 5 years of experience with JavaScript/React and a strong understanding of user experience design. The salary is up to £110,000, with flexible hours and growth opportunities.

Benefits

Flexible hours

Growth opportunities

Culture of creativity and experimentation

Qualifications

• 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.

Responsibilities

• Owning features from start to finish - collaborating with designers and PMs, building, testing, and releasing.
• Ensuring every feature is polished with strong attention to UX and quality.
• Exploring new ideas with dedicated 10% time and monthly AI Fridays.

Skills

JavaScript/React

Back-end development

Agile development

User experience design

Communication skills

Problem-solving mindset

Tools

Rails

AWS

Job description

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.