Senior Backend Developer

Summary

Join Paxful as a Senior Backend Developer and design, develop, and maintain the backend services powering our global peer-to-peer cryptocurrency marketplace. You will leverage your expertise in PHP, Go, and Node.js to build and maintain high-performance, scalable systems. Collaborate with cross-functional teams to deliver new features and ensure platform reliability. This role requires 5+ years of backend development experience with strong PHP expertise and familiarity with microservices. We offer a fully remote work environment with flexible hours and opportunities for professional growth and development. We are committed to building a collaborative and supportive work culture.

Requirements

• 5+ years of backend development experience, with strong expertise in PHP (preferably PHP 7.4+)
• Familiarity with frameworks like Laravel or Symfony
• Experience with Go and Node.js for developing microservices and handling event-driven systems
• Ability to contribute across multiple languages as needed
• Proficiency in database management
• Experience with SQL (PostgreSQL, MySQL) and familiarity with NoSQL databases like MongoDB
• Experience with RESTful API design and development
• Knowledge of API integration, versioning, and optimization
• Familiarity with CI/CD pipelines and DevOps workflows
• Hands-on experience with GitLab, Docker, and Kubernetes
• Understanding of secure backend development practices
• Familiarity with authentication mechanisms like OAuth, JWT, and API key management

Responsibilities

• Design and develop backend services primarily using PHP, with secondary contributions in Go and Node.js
• Build and maintain RESTful APIs that integrate seamlessly with frontend, mobile, and blockchain systems
• Collaborate with product managers, frontend, and mobile teams to define requirements and deliver new features
• Ensure backend services are scalable, secure, and optimized for high performance
• Debug and troubleshoot production issues to maintain platform reliability
• Contribute to the migration of legacy PHP systems to modern architectures and service-based designs
• Implement and optimize database queries for high availability and low latency
• Write robust unit and integration tests to maintain code quality
• Contribute to the development of microservices using Go and Node.js as needed
• Work closely with the DevOps team to deploy and monitor services using Kubernetes and Terraform
• Participate in peer code reviews and mentor junior developers to promote best practices

Preferred Qualifications

• Experience with message queues (e.g., RabbitMQ, Kafka) for asynchronous processing
• Familiarity with monitoring and logging tools (e.g., Prometheus, Grafana, ELK Stack)
• Knowledge of blockchain and cryptocurrency-related systems
• Background in performance optimization for high-traffic platforms
• Contributions to open-source projects or technical communities

Benefits

• Competitive salary
• Fully remote work environment
• Flexible working hours with a 4-hour overlap in Eastern Time (EST)
• Opportunity to work with cutting-edge technologies on impactful projects
• Collaborative, innovative, and supportive work culture
• Opportunity to mentor and lead a team of talented engineers
• Professional growth and development opportunities