Lead Full Stack Engineer

JustPark

Lead Full Stack Engineer at JustPark overseeing implementation of features and mentoring engineers across frontend and backend systems. Fostering technical excellence in a hybrid workplace in London.

Posted 5/29/2026full-timeLondon • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

CypressGoJavaScriptJestLaravelPHPReactSymfonyTypeScriptVue.js

About the role

Key responsibilities & impact

Lead and mentor engineers across multiple projects, fostering growth in both frontend and backend capabilities
Drive technical excellence and best practices across the full stack
Architect and oversee the implementation of features spanning React applications and PHP/Go backend services
Balance maintenance of existing systems with innovation in new features and platforms
Collaborate with product, design teams, and other engineering squads to deliver exceptional user experiences
Establish and maintain technical standards for full-stack development
Drive continuous improvement in application performance, stability, and system reliability
Oversee deployment processes and coordinate releases with stakeholders
Guide the technical roadmap for applications and services
Take charge of technical delivery while supporting more junior team members

Requirements

What you’ll need

5+ years of experience in software development with strong proficiency across frontend and backend
Experience mentoring or technically leading engineers, with a desire to grow into a broader team leadership role
Strong technical background in modern frontend frameworks (e.g. React, Vue, or similar), JavaScript/TypeScript, and the broader frontend ecosystem
Commercial experience with PHP & Laravel (or similar frameworks like Symfony), along with proven experience in Go
Experience with relational databases, in-memory data stores, and query optimisation
Strong understanding of both frontend architecture patterns and backend system design
Experience with server-side rendering (SSR) and API design
Familiarity with observability, telemetry, and high-volume system monitoring
Strong testing practices across the stack (Cypress, Jest, React Testing Library, PHPUnit)
Understanding of CI/CD pipelines and containerisation
Understanding of web performance optimisation and core web vitals
A performance-focused mindset, particularly with reservation systems or transactional platforms
Experience breaking down projects into small, incremental, shippable releases
Strong problem-solving skills and attention to detail

Benefits

Comp & perks

Generous holiday policy: 25 days + bank holidays + managers can grant up to 5 extra days for high performance (total of 38 days a year)
Free lunch on all office days via Feedr with daily meal choice
Free snacks & drinks on all office days
Private Medical Insurance with Vitality
Life assurance through YuLife
£25 credit for eye tests per year
Free O2 concert tickets through our partnership with the O2
£50 parking credit per month via JustPark
Cycle-to-work salary sacrifice scheme
EV salary sacrifice car scheme via Octopus Energy
Enhanced parental leave with 6-months enhanced maternity leave and 4 weeks fully-paid paternity leave
Help finding great childcare with funded hours via Koru Kids
Competitive pension offering with standard and salary sacrifice options
Quarterly away days with the whole UK team
Quarterly team social budget
Social activities and celebrations on our gorgeous rooftop in King's Cross

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Hard Skills & Tools

ReactPHPGoJavaScriptTypeScriptLaravelSymfonyCypressJestPHPUnit

Soft Skills

mentoringleadershipproblem-solvingattention to detailcollaborationtechnical deliverycontinuous improvementcommunicationfostering growthbalancing maintenance and innovation