We’re Red Tiger, a dynamic and self-contained team within the vast Evolution ecosystem, thriving with 200 talented professionals based in Sofia. Our expertise spans from product inception to final development, covering product, art, development, and more. Proudly 100% made in Bulgaria, we take immense pride in our achievements, adaptability, and the high quality of our games.
Job DescriptionAs a Senior Backend Developer in our Backend team, you will be a core technical contributor responsible for driving the architecture, scalability, and domain modeling of our high-concurrency Online Gaming & Betting Platform. Working alongside our Backend Architect and Engineering Lead, you will shape the future of our high-throughput platform, which processes real-time betting operations and high-volume financial transactions globally.
In this role, you will apply Domain-Driven Design (DDD) principles to model complex business domains into clean, maintainable, and decoupled microservices. You will lead technical design sessions, mentor junior and mid-level engineers, conduct rigorous code reviews, and drive performance optimizations across our RESTful API services, databases, and Docker-based environments.
Mission & Responsibilities
- Architect, design, and write high-performance, fault-tolerant PHP code utilizing Domain-Driven Design (DDD) and SOLID principles.
- Lead domain modeling discussions, define Bounded Contexts, and establish a Ubiquitous Language between technical and business domains.
- Maintain rigorous code review standards to enforce code quality, architectural consistency, and system security.
- Drive continuous performance tuning, database optimization, and refactoring of legacy components.
- Mentor and guide junior and mid-level developers, fostering continuous technical growth within the team.
- Partner with QA, DevOps, and Product leadership to ensure rapid, reliable deployment of critical backend services.
- Extensive hands-on experience in advanced PHP software development (PHP 7.4+, PHP 8.x).
- Practical experience applying Domain-Driven Design (DDD) concepts (e.g., Aggregates, Entities, Value Objects, Domain Events, Repositories, Bounded Contexts).
- Strong expertise in core PHP and custom architecture patterns without over-reliance on framework abstractions.
- Advanced experience with MySQL / MariaDB optimization, query tuning, indexing strategies, and handling heavy transaction loads.
- Deep knowledge of Docker, container orchestration, and modern containerized deployment strategies.
- Proven track record of designing, building, and maintaining high-throughput, low-latency RESTful APIs.
- Solid experience with JavaScript / Node.js for microservices or real-time event processing.
- Mastery of OOP principles, SOLID guidelines, design patterns, and clean code principles.
- Experience with automated testing, TDD/BDD practices (Codeception, PHPUnit).
Advantages:
- Experience with event-driven architectures and message brokers (RabbitMQ, Kafka).
- Expertise in caching layers (Redis, Memcached) and high-load database architecture (replication, sharding).
- Familiarity with web server administration and optimization (Nginx, Apache).
- Experience in the Online Gaming, FinTech, or high-frequency transactional domain.
Tech Stack & Tools:
- Primary Programming Languages: PHP (7.4+), JavaScript / Node.js (21+)
- Database Management: MySQL / MariaDB (10.4+)
- Containerization & Infrastructure: Docker
- Architecture & Protocols: REST APIs, JSON
- Version Control & Collaboration: Git / GitLab
What we offer:
- Environment tailored to allow you to realize your full potential
- Challenging work in a dynamic international team
- Company funded training.
- Flexibility on working hours
- Multisport/Coolfit card;
- Additional health insurance.
Skills Required
- Extensive hands-on experience with advanced PHP development, including PHP 7.4+ and PHP 8.x
- Practical experience applying Domain-Driven Design concepts, including aggregates, entities, value objects, domain events, repositories, and bounded contexts
- Strong expertise in core PHP and custom architecture patterns without over-reliance on framework abstractions
- Advanced experience optimizing MySQL or MariaDB, including query tuning, indexing, and heavy transaction loads
- Deep knowledge of Docker, container orchestration, and containerized deployment strategies
- Proven experience designing, building, and maintaining high-throughput, low-latency RESTful APIs
- Solid experience with JavaScript and Node.js for microservices or real-time event processing
- Mastery of object-oriented programming, SOLID principles, design patterns, and clean code practices
- Experience with automated testing and TDD or BDD practices, including Codeception or PHPUnit
- Experience with event-driven architectures and message brokers such as RabbitMQ or Kafka
- Expertise with caching layers such as Redis or Memcached and high-load database architectures including replication or sharding
- Familiarity with web server administration and optimization using Nginx or Apache
- Experience in online gaming, FinTech, or high-frequency transactional domains
What We Do
Evolution is a world-leader in product innovation and advanced IT-solutions for video streamed live casino. Our code runs 24/7/365 serving millions of users globally and processing financial transactions of thousands of EUROs every second. Evolution AB (publ) is listed on Nasdaq Nordic with a MCAP of over EUR 20B. The company was founded in 2006, inspired by the world-renowned casino in Monte Carlo. Using the rapidly emerging technology, Evolution founders wanted to bring the excitement from the live player experience in to the home. From that came our brand promise of delivering a product which was AS REAL AS IT GETS, and our key corporate value ALIVE. Today, more than 13,000 EVOlutioneers work in the company’s sites across 5 continents. With an ever-growing world-wide demand for our innovative product and high quality services, we look for more high performing talent with a team player mindset and diverse skillsets and backgrounds. Please read our Privacy and Cookies policies below before submitting any personal data to us: https://www.evolution.com/privacy-policy & https://www.evolution.com/cookies-policy Followers must be 18+. http://gambleaware.co.uk Please gamble responsibly. ? Evolution is licensed and regulated by the Malta Gaming Authority under licence MGA/B2B/187/2010 issued on 01 of August 2018. Evolution is also licensed and regulated in many other jurisdictions such as the United Kingdom, Belgium, Canada, Romania, South Africa, and others.
