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- Tasks: Build and scale OnBuy’s core commerce platform across front-end and back-end systems.
- Company: Join one of the UK's fastest-growing tech companies on a mission to be the best online marketplace.
- Benefits: Competitive salary, company equity, 25 days leave, and career development opportunities.
- Other info: Remote or hybrid work options available; thrive in a collaborative, fast-paced team.
- Why this job: Make a real impact in a dynamic environment where your voice is heard and valued.
- Qualifications: Strong full stack engineering experience with PHP and modern JavaScript frameworks.
The predicted salary is between 65000 - 70000 £ per year.
Who are OnBuy? OnBuy are an online marketplace who are on a mission of being the best choice for every customer, everywhere. We have recently been named one of the UK's fastest-growing tech companies in the Sunday Times 100 Tech list. All achievements we are very proud of, but we don't let that go to our head. We are all laser focused on our mission and understand the huge joint effort ahead of us needed to succeed.
Working at OnBuy We are a team of driven and motivated people who thrive when working at pace. To succeed at OnBuy you need to take charge and fully own your responsibilities, rolling your sleeves up when needed to 'get it done'. Working at OnBuy you are surrounded by so much opportunity, but you must possess the ability to stay focused and prioritise ruthlessly. Most importantly, you will thrive in an ever-changing environment as we are constantly evolving. At OnBuy, you're not just a number or another cog in a machine. We are creating something really special, and you have the opportunity to affect meaningful change and have your voice heard. We are a close team, who have the opportunity to learn and grow as OnBuy evolves.
This is a critical role responsible for building, scaling, and evolving OnBuy’s core commerce platform across both front-end and back-end systems. As a Senior Full Stack Engineer, you will own engineering delivery end-to-end; from customer-facing experiences to underlying services and data systems. You will operate within a cross-functional team and be accountable for shipping high-quality, scalable solutions that directly impact GMV, seller performance, and customer experience. This role moves beyond ‘front-end vs back-end’ you are an Engineer responsible for outcomes, not layers.
- End-to-End Engineering Ownership
- Design, build, and maintain full-stack solutions across UI, APIs, and backend systems
- Translate product requirements, designs, and wireframes into scalable, production-ready systems
- Own features from concept development testing release monitoring
- Front-End Excellence
- Build responsive, high-performance user interfaces using modern JavaScript frameworks
- Translate UI/UX designs into clean, maintainable code
- Optimise applications for speed, scalability, and usability
- Back-End & Platform Engineering
- Design and develop scalable services and APIs
- Work across monolith and microservices architecture (Laravel / PHP services)
- Maintain and evolve legacy systems while building modern, scalable architecture
- Quality & Engineering Standards
- Own quality to production — testing is embedded, not a phase
- Write and maintain automated tests (unit, integration, end-to-end)
- Participate in and lead code reviews to ensure high engineering standards
- Debug, troubleshoot, and resolve issues across the stack
- Performance & Scalability
- Optimise systems for performance, reliability, and scale
- Work with large-scale data systems (MySQL, NoSQL, search platforms)
- Identify bottlenecks and proactively improve system efficiency
- Collaboration & Leadership
- Work in cross-functional teams with Product, Design, QA, and other Engineers
- Mentor and support less experienced engineers
- Communicate technical concepts clearly to non-technical stakeholders
Requirements
- Essential
- Strong full stack engineering experience, owning end-to-end delivery
- Proven backend expertise in PHP (Laravel)
- Strong JavaScript (ES6+) skills with modern frameworks (React/Vue/Angular)
- Experience designing and building RESTful APIs and scalable systems
- Experience with MySQL and NoSQL databases (e.g. Couchbase, MongoDB)
- Strong understanding of system architecture and microservices
- Experience with event-driven systems (e.g. RabbitMQ, Pub/Sub) and cloud environments (GCP)
- Familiarity with Docker and CI/CD pipelines
- Strong engineering practices: testing, code quality, and production ownership
- Desirable
- Experience in eCommerce or marketplace platforms
- Cloud experience (GCP)
- Experience with NoSQL (e.g. Couchbase) and Search platforms (e.g. Constructor & Solr)
- Experience working in microservices architecture
Benefits
The salary on offer for this role is £65000- £70000 depending on experience. We also offer the following benefits:
- Company Equity- In return for helping us to grow, we’ll offer you company equity, meaning you own a piece of this business we are all working so hard to build.
- 25 days annual leave + Bank Holidays
- 1 extra day off for your Birthday
- Employee Assistance Programme
- Perks at Work benefit platform
- Opportunities for career development and progression
This role is UK remote or if you prefer coming into the office can be Hybrid if you live near our Manchester or Bournemouth's offices.
Our Commitment
OnBuy is an equal opportunities employer. We are dedicated to creating a fair and transparent workforce, starting with a recruitment process that does not discriminate on the basis of gender, sexual orientation, marital or civil partnership status, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability, or age.
Senior Full Stack Engineer in Bournemouth employer: OnBuy.com
Contact Detail:
OnBuy.com Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Full Stack Engineer in Bournemouth
✨Tip Number 1
Network like a pro! Reach out to your connections on LinkedIn or attend local tech meetups. You never know who might have the inside scoop on job openings at OnBuy or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best projects, especially those that highlight your full stack capabilities. This is your chance to demonstrate how you can own engineering delivery end-to-end.
✨Tip Number 3
Prepare for the interview by brushing up on your technical knowledge and soft skills. Be ready to discuss how you've tackled challenges in past roles and how you can contribute to OnBuy's mission of being the best choice for customers.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you're genuinely interested in joining the OnBuy team.
We think you need these skills to ace Senior Full Stack Engineer in Bournemouth
Some tips for your application 🫡
Show Your Passion: When writing your application, let your enthusiasm for the role shine through! We want to see how excited you are about being part of OnBuy and contributing to our mission. Share why you’re drawn to this position and how your skills align with our goals.
Tailor Your CV: Make sure your CV is tailored specifically for the Senior Full Stack Engineer role. Highlight your full stack experience, especially with PHP and JavaScript frameworks. We love seeing relevant projects that demonstrate your ability to own end-to-end delivery!
Be Clear and Concise: Keep your application clear and to the point. Use bullet points where possible to make it easy for us to read. We appreciate straightforward communication, so don’t be afraid to show off your technical skills without overcomplicating things.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re serious about joining our team at OnBuy!
How to prepare for a job interview at OnBuy.com
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially PHP (Laravel) and modern JavaScript frameworks like React or Vue. Brush up on your knowledge of RESTful APIs and database systems like MySQL and NoSQL, as these will likely come up during technical discussions.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous roles and how you tackled them. OnBuy values engineers who can own their responsibilities and find solutions, so be ready to demonstrate your ability to think critically and adapt in an ever-changing environment.
✨Emphasise Collaboration
Since this role involves working in cross-functional teams, highlight your experience collaborating with product managers, designers, and other engineers. Share examples of how you’ve communicated technical concepts to non-technical stakeholders, as this will show your ability to work effectively within a team.
✨Ask Insightful Questions
Prepare thoughtful questions about OnBuy’s mission, culture, and future projects. This not only shows your genuine interest in the company but also gives you a chance to assess if it’s the right fit for you. Consider asking about their approach to scaling systems or how they handle engineering quality standards.