PHP Developer

Company Description

Hodler Group operates in the digital asset space, building and supporting platforms that make crypto trading accessible, secure, and user-friendly for a global audience. Compliance, security, and transparency sit at the centre of how we work. Our teams are technology-driven and value problem-solving, customer-centric thinking, and continuous improvement.

Role Description

The Mid-Level PHP Developer is a full-time, hybrid role based in Athens, with the flexibility to work from home part of the time. You will join our backend team to design, build, and maintain the APIs and services that power a trading platform.

Key Responsibilities

• Design, develop, and maintain RESTful APIs and backend services in PHP
• Write clean, maintainable vanilla PHP using OOP principles and PSR standards
• Contribute to framework-based projects (e.g., Laravel, Symfony) where applicable
• Design and optimise MySQL schemas, queries, indexes, and transactions
• Integrate third-party services such as payment providers, KYC/AML tools, exchanges, and external APIs
• Apply security best practices, including input validation, authentication/authorisation, and protection against SQL injection, XSS, and CSRF
• Write and maintain automated tests (e.g., PHPUnit) and take part in code reviews
• Troubleshoot, debug, and resolve production issues, and identify performance bottlenecks
• Maintain technical documentation for APIs and internal systems
• Collaborate with product, frontend, and QA teams to deliver features end to end

Requirements

• 3+ years of professional experience in backend PHP development
• Strong command of native PHP (PHP 7.x and 8.x), OOP, and common design patterns
• Proven experience building and consuming REST APIs (JSON, HTTP, authentication methods such as JWT or OAuth)
• Solid MySQL skills: schema design, complex queries, indexing, and query optimisation
• Familiarity with at least one PHP framework (Laravel, Symfony, Slim, or similar)
• Experience with Git and Composer
• Good understanding of web application security
• Fluent in English, written and verbal
• Able to work independently and take ownership of tasks

Nice to Have

• Experience with Docker and Linux server environments
• Familiarity with Redis, message queues (e.g., RabbitMQ), or background job processing
• Experience with CI/CD pipelines
• Basic understanding of crypto, blockchain, and digital asset trading
• Prior experience in fintech, banking, EMI, or payments environments
• Exposure to WebSockets or real-time data systems

What We Offer

• Competitive Salary: €35000–€4 5000 gross, based on experience and qualifications
• Generous Leave Policy: Extra annual leave to support a healthy work–life balance
• Flexible Work Setup: Hybrid role with flexible hours
• Thrilling Industry Exposure: Be part of the fast-growing cryptocurrency sector
• Top-Quality Equipment: Access to modern tools and technology