Senior Backend Engineer (PHP)

As our Backend Engineer, you'll build the engine behind our platform: designing features that hold up under enterprise traffic, optimizing the paths that can't afford to crack, and partnering closely with Frontend, Product, and Infrastructure to turn business needs into systems that simply work. Reliability doesn't just happen here, we design for it. You care about clean data, resilient systems, and performance that never cracks. Not because anyone will see your code, but because they'll feel it when it fails. At Dyflexis, that's not an option.

• Design features that handle enterprise traffic across regions
• Optimize critical paths for performance and reliability
• Follow patterns for code quality, testing, and release readiness
• Partner with DevOps on deployments and monitoring
• Champion operational excellence in engineering decisions
• Mentor engineers who are growing fast
• Work in focused 6-week cycles, a deliberate post-scrum method built for builders

• 5+ years building backend systems that hold up under production traffic, with a hand in the architecture decisions behind them
• Solid experience with PHP (Symfony) and relational databases including MySQL, with real query optimization behind you
• You've debugged race conditions that only appeared under load, and fixed databases that were keeling over
• Comfortable with the trade-offs between consistency, availability, and partition tolerance
• You think in systems, not tickets. When someone proposes a feature, you're already mapping failure modes
• Comfortable with ownership: you ship it, you own it, you sleep soundly
• Experience with Redis, Docker, Kubernetes, and GitLab CI/CD is a plus

Pulled from the full job description Professional development assistance Pension plan Commuter assistance, At Dyflexis, you'll be part of an ambitious, energetic, and customer-focused team. We offer:

• Fixed salary up to €6.500 gross per month based on a 40-hour week (skill based).
• Personal development budget to level up your skills.
• 25 vacation days + your birthday off in exchange for cake.
• An in-house chef surprising you daily with fresh lunch.
• The best parties, drinks & trips (Winter sports, Ibiza & more).
• Membership at ARJ Training boxing gym (home of champion Tarik & Levi Rigters).
• Solid pension plan & 8% holiday allowance.
• Buy or sell vacation days - you decide.
• Travel allowance and WFH compensation.
• Friday chair massages to kick off your weekend.

At Dyflexis, we help millions of employees worldwide with our workforce management software. From the bakery around the corner to international hotel and retail chains. The software is powerful, customer questions are diverse, and no two days are the same. You'll get to know the product inside out and contribute to something that's growing rapidly in more than 20 other countries. How do we do it? We work in a fast-paced environment with short communication lines. There are no unnecessary meetings and no politics. Our Focus? Ownership, clear communication, and getting things done together. We move quickly, learn by doing, and continuously improve how we support our customers. Right now, we're scaling across Europe and into the US, and we need a Backend Engineer that can carry that weight.