Senior Full Stack Developer

🔒 Confidential Employer
Posted 7 May 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Software Engineering
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Node.js React Next.js TypeScript Serverless RESTful APIs Automated Testing CI/CD

FULL DESCRIPTION

Senior Full Stack Developer

Company: [Employer hidden — view at passion-project.co.uk] Group

Location: London (Hybrid)

Employment Type: Full-time

Join us at [Employer hidden] as a Senior Developer — build fast, scalable solutions that power amazing user experiences and real impact.

About [Employer hidden]

Join [Employer hidden] Group and be at the forefront of transforming the residential energy landscape. Founded in 2015, [Employer hidden] began in the home cover market. Today we’re spearheading the shift to decentralised, digitised home energy systems using heat pumps, solar panels, batteries, EV chargers and smart controls.

The Role

As Senior Full Stack Developer for [Employer hidden], you’ll work across our NodeJS/Serverless back end and Next.js/React/TypeScript front end, delivering scalable, high-performance solutions for partners and consumers.

Responsibilities

  • Full-Stack Development: Architect and build scalable web applications.
  • Clean Code & Performance: Write clean, maintainable code and document RESTful APIs.
  • Cross-Functional Collaboration: Partner with Product, Growth and Operations.
  • Troubleshooting & Support: Diagnose and resolve issues across the full stack.
  • Automated Testing & QA: Build test suites and integrate into CI pipelines.
  • Documentation: Maintain clear documentation for codebases and architectures.
  • Continuous Improvement: Stay updated with industry trends and recommend changes.

Requirements

  • Full-Stack Expertise (5+ years): Proven experience with NodeJS/Serverless and React/Next.js.
  • Strong Ownership & Autonomy.
  • Analytical Thinker.
  • Meticulous Quality Focus.
  • Excellent Communication Skills.
  • Curiosity-Driven Approach.
  • Effective Time Management.

Perks

  • 25 days holiday plus bank holidays and your birthday.
  • Free home emergency cover with [Employer hidden] plus 40% discount for friends & family.
  • Discounted gym memberships.
  • £500 home office allowance.
  • Support for mental health via Oliva.
  • Menopause support from Stella.
  • Cycle-to-work scheme.
  • Regular team socials including Summer and Winter parties.

Recruitment Process

  • Initial Call (30 mins)
  • Technical Interview (30 mins)
  • Technical Exercise (1.5 hrs)
  • Final Interview (30 mins)
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