Senior Full Stack Engineer (PHP)

Are you a Senior Full Stack Engineer who thrives on building scalable web applications and AI-driven tech and looking for high-autonomy impact on a 4 or 5-day workweek (32-40 hours)

Your Mission:

As our Senior Full Stack Engineer in Groningen your mission is to architect build and scale core features across our recruitment technology platform. Working across the full software lifecycle exclusively utilizing Svelte on the frontend and Symfony 8 on the backend you will help empower hundreds of global enterprises to hire smarter. We are looking for a true software engineer who writes clean foundational code rather than relying solely on framework-level scripting. Bringing senior-level engineering rigor and a passion for clean architecture you will turn complex product visions into high-performing maintainable code.

What You Will Do:

• Architect develop and maintain responsive frontend applications strictly in Svelte and robust backend services exclusively in Symfony 8 across the platform ecosystem.
• Collaborate closely with product managers UI/UX designers and QA engineers to scope estimate and ship scalable high-impact features in an Agile environment.
• Integrate modern AI capabilities data pipelines and third-party systems (such as ATS platforms) through reliable RESTful and GraphQL APIs.
• Write clean highly testable and efficient core code demonstrating deep language fundamentals and custom software engineering beyond framework-level scripting.
• Conduct thoughtful code reviews champion CI/CD automated workflows and ensure system reliability performance and security.
• Identify and execute tech debt refactoring optimize database/query performance and troubleshoot complex production issues across the stack.
• Share expertise collaborate asynchronously and help foster an inclusive engineering-first culture across our international team.

What We Look For:

• 10 years of professional software engineering experience developing full-stack web applications in modern SaaS or tech environments.
• 10 years of deep experience in full-stack engineering with proven hands-on mastery of PHP (strictly Symfony framework) and modern frontend development (preferably Svelte).
• Strong foundational programming skills with the ability to write custom low-level logic and clean architecture from scratch rather than relying solely on framework abstractions scripting and AI.
• Strong expertise with relational and non-relational databases (e.g. MySQL MariaDB) and designing scalable REST/GraphQL APIs.
• Practical experience with cloud architecture (GCP) containerization (Docker) and modern CI/CD pipelines.
• A strong dedication to automated testing practices (unit integration e2e) and clean code principles.
• Native Dutch speaking professional fluency in English with the confidence to articulate technical ideas clearly to both technical and non-technical stakeholders.

Why you cant miss out on this opportunity

We take good care of our VONQies and that shows in our benefits package: 

• A paycheck that fairly reflects the market and your experience and of course monthly pension contributions
• A MacBook for both business and private use!
• A fixed monthly phone expense allowance
• A premium HeadSpace subscription to recharge your batteries after work. 
• Flexible vacation days - thats right we will not define a specific number though a fair-usage approach applies to keep all team members happy!
• 100% reimbursement of your public transport expenses so you can come to this lovely office worry-free.
• Still prefer to use your own vehicle We offer a KM reimbursement and parking is on us!
• A hybrid work model - work in the office and from home.
• Snacks sodas coffee and everything you need for a pick me up break.
• Opportunities to grow your skills and take on exciting challenges in an entrepreneurial environment. No silos no corporate red tape - share your ideas freely even directly with the CEO
• A great fun and young team in a dynamic fast-growing international tech company together we are stronger!

Buckle up and get hired! Heres our interview process:

1. Recruiter Call A quick friendly chat to see if were a mutual match.
2. Meet Your Manager Dive into what the role actually looks like IRL.
3. Meet the P&E Team Show us how you approach.
4. Final Step: Reference Checks A quick chat with 2  former managers/ clients/ colleagues to hear what its like to partner with you.

You can start by clicking on the Apply button. Questions Contact HR through

Get to know us!

VONQ is the next-generation agentic AI recruitment technology company helping more than 350 global enterprises and staffing agencies attract evaluate and advance talent. With 20 years of market expertise and deep integrations with 70 ATS partners VONQ combines AI-driven job distribution and expert insights to deliver high-quality candidates while elevating employer brands.

Through its EQO platform and specialised AI Agents VONQ supports recruiters by engaging candidates assessing them consistently and providing transparent comparable shortlists.

Headquartered in Rotterdam VONQ operates offices in Groningen Düsseldorf and London and is a four-time Strategic Leader in the Fosway Group 9-Grid for Talent Acquisition.

With over 110 team members across the globe were building the future of hiring together - and wed love to make it happen with you.

Remote Work :

No

Employment Type :

Full-time