Backend Developer (PHP) - Payments

We’re recruiting on behalf of a fast-growing European FinTech that provides crypto purchase/sale and payments rails for both end users and businesses. They’re looking for a Senior Backend Developer (PHP) to help scale core backend services where correctness, security, and performance matter.
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What you’ll do

• Write modern PHP (8.3+) using strict types, typed properties, and PSR standards
• Build and maintain high-performance APIs, background jobs, and database-driven features
• Review pull requests: catch bugs, enforce standards, and suggest better patterns
• Identify opportunities to improve code quality, architecture, and performance
• Optimise PostgreSQL queries, API responses, and background jobs for speed and efficiency

Requirements

• 5+ years of professional PHP experience
• Strong OOP fundamentals, design patterns, and clean architecture
• Strong PostgreSQL skills (query optimisation, migrations)
• Experience with Git workflows, CI/CD, and deployment processes
• Security mindset + attention to detail (edge cases, performance, failure modes)
• Native-level English (spoken and written)
• Located within CET ±2 hours (UK to Germany-style timezones)
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Nice to have

• Experience in payments (highly relevant); crypto exposure is a plus, not required
• Event-driven/async processing, queues, observability

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