Senior PHP Full Stack Developer

Developex is looking for an experienced Senior Full Stack PHP Developer to join the Ukrainian team and work in close collaboration with the client’s team in the United States.

Our client is a company developing a cloud-based POS system for retail businesses, which helps companies manage sales, inventory, payments, and customer data in a single platform and scale from a single store to multi-location operations.

Requirements

• Experience with PHP (7.4+)
• Strong knowledge of TypeScript / JavaScript
• Experience in backend development and REST API design
• Practical experience with relational databases
• SQL query writing and optimization
• Understanding of indexing and transactions
• Commercial experience working with large and complex legacy codebases
• Strong understanding of OOP principles
• Knowledge and application of SOLID, DRY, KISS principles
• Experience with code refactoring
• Practical experience writing automated tests and working with PHPUnit or similar frameworks
• Debugging and troubleshooting skills
• Experience with logging and error diagnostics
• Understanding and application of web application security fundamentals
• English level Upper-Intermediate (B2+) for daily spoken communication with native speakers

Nice to have

• Experience integrating external APIs, working with webhooks and payment systems
• Knowledge of the npm ecosystem and frontend build tools
• Basic Docker skills
• Experience with e-commerce / POS / ERP / CRM systems
• Experience with high-load or data-heavy systems

We offer:

• Flexible working hours for a healthy work-life balance
• Competitive compensation aligned with your experience and contribution to the company
• Full social package (vacation, sick leave, health insurance, additional days off on Ukrainian public holidays)
• Paid training and English courses
• FOP support and legal assistance
• Stability and reliability of the company

Selection process:

CV screening → Recruiter call → Technical interview → Final interview with the client → Job offer

If you are interested in working on a complex product and influencing its development - we will be happy to receive your application!