Principal full stack engineer, contract Work, Jobs in London, Eng (with Salaries)

Principal Full-Stack Engineer, Contract
Xcelirate —London
- £139,000 a year
- Remote
- AWS
- JavaScript
- Linux
Quick apply
Principal Full Stack Engineer & Architecture Lead
Command —London
- £100,000 - £110,000 a year
- Hybrid work
- AWS
- JavaScript
- APIs
Quick apply
Senior Full Stack Engineer (Developer)
Tapi —London
- Full-time
- Azure
- DevOps
- APIs
Head of Special Projects
NextStep —London
- £90,000 - £115,000 a year
- Full-time
- Hybrid work
- Travel
- Communication skills
Quick apply
Principal Mechanical Engineer
BAE Systems Inc. —Westminster
- £118,095 - £200,762 a year
- Full-time
- Remote
- Doctoral degree
- CAD
- Engineering
- Annual leave
- Employee assistance programme
Senior Full Stack Engineer
ManholeMetrics —London
- £60,000 - £80,000 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- AWS
- Annual leave
- Work from home
Quick apply
2h
Chief Technology Officer
OFGEM —London
- £81,000 - £117,800 a year
- Full-time
- Hybrid work
- Azure
- Presentation skills
- IT
- Flexible schedule
14d
Full Stack Developer
Barclays —London
- Oracle
- Java
- Python
Social Media Annotation - Freelance AI Trainer Project
Meridial —London
- £16 - £28 an hour
- Remote
- Engineering
- No degree
- AI
- Annual leave
Principal Full Stack Lead Engineer - Vice President
Sumitomo Mitsui Banking Corporation —London
- Hybrid work
- Continuous improvement
- JavaScript
- APIs
- Annual leave
Business Development Representative
VFS SPV Ltd —London
- £55,000 - £75,000 a year
- Full-time
- Customer service
- English
- Business development
- Free parking
Quick apply
14d
People Partner
CoMind —London
- £68,800 - £103,000 a year
- Full-time
- Employee assistance programme
- Employee discount
10d
Full Stack Engineer
Pear VC —London
- Full-time
- DevOps
- AWS
- AI
Senior Full Stack Engineer
Informed Solutions —London
- Full-time
- Hybrid work
- Azure
- Java
- AWS
- Gym membership
- Referral programme
Quick apply
Lead Full-Stack Engineer
Complexio —London
- Full-time
- Remote
- APIs
- AI
Quick apply
Senior Full Stack Engineer
Universal Music Group —London
- Full-time
- Azure
- Computer Science
- SQL
- Annual leave
- Employee discount
Principal Engineer - Contract - Outside IR35
Mindera —London
- Hybrid work
- System design
- Java
- Machine learning
Quick apply
13d
Operations & Growth Manager (Part-Time, Initial 3-Month Contract)
Fertility Solutions —Beaconsfield
- £60,000 - £80,000 a year
- Part-time
- Hybrid work
- Management
- Project management
- Travel
- Free parking
- Profit sharing
Quick apply
1d
Audio Editing Specialist - Freelance AI Trainer Project
Meridial —London
- £8 - £65 an hour
- Remote
- Engineering
- Master's degree
- Bachelor's degree
- Annual leave
Deputy Account Director
Chartwells —London
- £70,000 a year
- Hospitality
- Project management
- Continuous improvement
- Employee discount
6d

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principal full stack engineer, contract jobs near london, eng

Principal Full-Stack Engineer, Contract

Xcelirate
London

Quick apply

Job details

Fixed term contract
£139,000 a year

Qualifications

React
Ansible
Software deployment
Test automation
Test-driven development
PHP
AWS
Docker
JavaScript
Terraform
Symfony
Linux
Vue.js
Python

Full job description

Who Are We?

Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible.

What are we looking for?

You're a Principal-Level Full-Stack Engineer. You haven't just been around the block - you helped decide which blocks were worth building, and which ones should've been bulldozed early.

At this point, programming languages don’t really impress you anymore. You treat them as tools that translate intent into something a compiler or interpreter can run, choosing them pragmatically, discarding them without nostalgia, and never confusing syntax or novelty with actual progress.

You’ve been around long enough to remember when PHP constructors shared their class names, when exceptions were returned instead of thrown, and when Yeoman, Underscore, and CoffeeScript felt like the obvious future. More importantly, you also learned when to stop using those awful, awful, creations.

Despite all that experience, you’ve stayed deeply hands-on, and you’ve never been particularly interested in drifting into management just because that seemed like the default next step. You’re still happiest close to the code.

You bring a distinctly stoic approach to your work. You don’t panic when systems misbehave, you don’t chase drama, and you don’t confuse urgency with importance.

When you join a project, things tend to settle down. Code becomes easier to reason about, systems start to feel calmer, and decisions get clearer. That sense of clarity tends to spread to the people around you, and without any formal mentoring process, they start picking things up simply by working alongside you.

You have a solid, intuitive understanding of hot-path optimization, speculative execution, and lazy initialization, and you’re occasionally surprised that these simple concepts aren’t more widely understood.

And the homelab experiments you keep running at home, purely because you’re curious and can’t help yourself? We definitely want to hear about those.

If reading this feels a little too familiar, this role is likely to be a very good fit.

What will you be doing?

Manage your own time while adhering to priorities set by the company.
Own complex engineering problems end-to-end, from problem framing and design through to delivery and iteration.
Take responsibility for critical areas of the platform, ensuring they remain reliable, performant, and maintainable.
Build new features and improve existing ones across our platforms.
Refactor legacy and modern codebases pragmatically, balancing long-term health with delivery needs.
Write tests (unit, integration, and end-to-end) to ensure software reliability.
Be involved in every phase of the software lifecycle, from ideation to deployment.
Participate in (and at times lead) deep technical discussions, helping drive sound decisions and trade-offs.
Work hands-on across backend and frontend systems, stepping in wherever the problem lives.
Identify inefficiencies and help streamline workflows, reducing unnecessary work.
Collaborate closely with other senior engineers, raising the bar through example rather than authority
Take ownership of your work, ensuring high-quality results and maintainable solutions.

Requirements

What will you bring along?

15+ years hands-on experience building and maintaining complex web applications
Clear technical communication; able to explain and defend design decisions to senior engineers and non-engineers alike
Expert PHP developer (12+ years); Symfony or equivalent frameworks
10+ years modern JavaScript; React or Vue (Next/Nuxt a plus)
Expert level knowledge in at least one more programming language (Python a plus)
Full-stack architecture expertise: monoliths, services, and hybrids
Power user cloud deployment and scaling (AWS preferred) experience and abilities
Expert Linux user; including daily containerized workflows with Docker
Expert in infrastructure automation: Terraform, Ansible
Power user level CI/CD pipeline and release workflow ownership
Experience in automated testing: unit, integration, E2E; TDD where appropriate
Expert level knowledge in and around web security fundamentals: auth, authorization, data protection, secure coding
Legacy + modern codebase fluency; ability to work on incremental modernization
Strong independent technical ownership and accountability

We are always looking for the best candidates, so if you think you would be a good fit even if you don't meet 100% of the requirements, we would love to hear from you!

Benefits

How We Support Our Contractors

An annualised rate of €139,000 + retention bonus scheme: Competitive contractor rate with a generous bonus paid every 6 months based on your time with us.
Top-Notch Workstation: We provide the latest MacBook, branded merchandise, and everything you need for an optimal work environment.
Global Co-Working Access: Work from a global network of co-working spaces to keep your work-life dynamic and flexible.
Flexibility: Enjoy full flexibility in work location and hours, supporting a work-life balance tailored to your needs.
Events and Gatherings: Participate in exciting events throughout the year, including team gatherings, cultural events, and other fun activities.

Quick apply

Refine Your Search

principal full stack engineer, contract jobs in london, eng

Principal Full-Stack Engineer, Contract

Principal Full Stack Engineer & Architecture Lead

Senior Full Stack Engineer (Developer)

Head of Special Projects

Principal Mechanical Engineer

Senior Full Stack Engineer

Chief Technology Officer

Full Stack Developer

Social Media Annotation - Freelance AI Trainer Project

Principal Full Stack Lead Engineer - Vice President

Business Development Representative

People Partner

Full Stack Engineer

Senior Full Stack Engineer

Lead Full-Stack Engineer

Senior Full Stack Engineer

Principal Engineer - Contract - Outside IR35

Operations & Growth Manager (Part-Time, Initial 3-Month Contract)

Audio Editing Specialist - Freelance AI Trainer Project

Deputy Account Director

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