Backend Engineer
About Paybis
Paybis is a global fintech company operating in the crypto and payments space. We build scalable financial products used by customers worldwide and continue expanding our backend engineering capabilities to support rapid product growth.
We are currently strengthening our backend engineering team to accelerate development of our native mobile application and core backend services. This role is critical for improving delivery speed, scalability, and long-term architecture quality across our platform.
We are looking for a strong Senior PHP Back-end Developer who combines deep PHP/Symfony expertise with architectural thinking, ownership mindset, and passion for building reliable high-load backend systems.
Role Overview
As a Senior PHP Back-end Developer, you will work on scalable backend services powering our fintech and crypto products. You will contribute to API development, microservices architecture, legacy refactoring, performance optimization, and engineering quality improvements across the platform.
This is a hands-on engineering role with high ownership and autonomy. You will collaborate closely with backend engineers, DevOps, QA, mobile developers, and product teams in a fast-paced product environment.
The ideal candidate is proactive, technically mature, comfortable with complex systems, and capable of driving backend improvements independently.
Key Responsibilities
- Design, develop, and maintain scalable backend services using PHP and Symfony 6/7
- Build and support secure RESTful APIs and service integrations
- Contribute to microservices and service-oriented architecture development
- Improve backend scalability, reliability, and performance
- Refactor legacy code and reduce technical debt
- Participate in architecture discussions and propose engineering improvements
- Write clean, maintainable, and testable code following engineering best practices
- Conduct code reviews and contribute to engineering quality standards
- Troubleshoot production issues and support incident resolution
- Collaborate with QA, DevOps, Product, and Mobile teams
- Support CI/CD processes and production releases
- Document technical solutions and share knowledge across the team
- Mentor less experienced developers when needed
Required Qualifications
Technical Requirements
- 5+ years of commercial PHP development experience
- 2+ years of hands-on experience with Symfony 6/7
- Strong understanding of OOP, SOLID principles, and design patterns
- Experience building and maintaining REST APIs
- Experience with microservices and service-oriented architecture
- Strong knowledge of relational databases (MariaDB/MySQL)
- Experience with Redis or other NoSQL solutions
- Experience working with RabbitMQ or similar message brokers
- Strong understanding of clean code practices and backend architecture
- Experience with unit and integration testing
- Familiarity with Docker and CI/CD workflows
- В2/С1 English for daily engineering communication
Soft Skills
- Strong ownership and self-management skills
- Ability to work independently with minimal supervision
- Strong problem-solving and analytical thinking
- Effective communication and teamwork skills
- Proactive mindset and engineering initiative
- Adaptability in fast-changing environments
- Willingness to continuously learn and improve
Nice-to-Have Experience
- AWS infrastructure experience (Aurora, DynamoDB, SNS, SQS)
- Terraform and cloud infrastructure knowledge
- Experience with high-load systems
- Fintech, payments, or crypto domain experience
- Payment gateway integrations
- DevOps and infrastructure collaboration experience
- Go experience or interest in learning Go
- Experience with secure coding practices:
- CORS / CSRF / XSS prevention
- SQL injection prevention
- Secrets and configuration management
- Dependency vulnerability management
- Experience mentoring developers or leading technical initiatives
What We Offer
- Remote-first global environment
- Opportunity to work on modern fintech and crypto products
- High level of ownership and engineering impact
- Collaborative and technically strong engineering culture
- Fast-moving product environment with minimal bureaucracy
- Exposure to scalable backend and cloud-native architectures
- Opportunity to influence architecture and engineering standards
- Long-term growth opportunities within the engineering organization
Interview Process
Stage 1 — Team Leader Interview (1.5h)
Focus:
- PHP/Symfony expertise
- Backend engineering depth
- Ownership and problem-solving
Stage 2 — System Design Interview (1.5h)
Focus:
- Architecture thinking
- APIs and scalability
- Design patterns and engineering decisions
Stage 3 — CIO + Head of HR Interview (1h)
Focus:
- Culture fit
- Communication
- Growth potential
- Team collaboration