Senior BackEnd Engineer Offline

Gamzix company, a dynamic player in the iGaming industry: 
— was founded in March 2020 with a vision to redefine the world of online slot games 
— has already successfully produced 60 slot games 
— the team has grown to over 90 skilled professionals and we continue to grow 
— two strategically located offices in Europe 
— with a strong focus on quality and compliance, we hold the prestigious MGA B2B Critical Supply License
— certifications from industry leaders iTechLabs and GLI, ensuring the highest standards

As a Senior Backend Developer, you will be responsible for designing, developing, and optimizing backend solutions that power our applications. You will work closely with cross-functional teams to ensure our systems are scalable, secure, and performant.
 

Key Responsibilities:

— Architect, develop, and maintain scalable and optimized APIs for high-load applications
— Write clean, maintainable, and efficient Node.js (NestJS) code following best practices
— Conduct code reviews to ensure high-quality and reliable software solutions
— Collaborate with DevOps teams to optimize CI/CD pipelines, monitoring, logging, and system reliability
— Investigate and implement technical solutions to meet business needs and improve system performance
— Design and refine database structures using PostgreSQL, Redis, and message brokers like RabbitMQ
— Ensure data integrity and security across all backend systems
— Research and adopt new technologies and frameworks to enhance development efficiency
— Contribute to technical documentation, including system architecture and API specifications.
 

Requirements:

• 5+ years of backend development experience with a strong focus on Node.js and TypeScript
• Experience with NestJS for building scalable backend applications
• Hands-on expertise with PostgreSQL, Redis, and RabbitMQ
• Solid understanding of microservices architecture and event-driven systems
• Familiarity with high-load applications and performance optimization techniques
• Strong problem-solving skills and the ability to work both independently and in a team
• Effective communication skills and a proactive mindset
• English level: Intermediate+ or proficiency in another language.
   

Nice to Have:

• Experience working with AWS services and Kubernetes
• Knowledge of GitLab, TeamCity, ArgoCD, Grafana, and Prometheus
• Previous experience in Gambling/iGaming or similar high-load industries
• Experience in designing and optimizing database schemas for large-scale applications
   

Hiring process:

• 1st interview - Recruiter
• 2nd interview - Tech Team
• 3rd interview - CTO

• 4th interview - HRD

   

What we offer:

• 7 hour working day 10:00 AM — 6:00 PM (with the lunch break)
• Hybrid format of working day
• A-class office, Mokotow, Warsaw
• Competitive salary in the IT field, fixed in €
• Paid taxes
• State holidays are paid
• 10 days for paid sick leave
• 28 days of paid vacation: 18 and 10 days separately
• Medical Insurance
• Courses/training reimbursement
• Corporate English courses: business or general, morning or evening schedule
• People-oriented company with the work & life balance
• Opened and friendly communication
• Corporate team buildings and activities