Competitive – discussed at interview. Senior Back-End Engineer – Sports Betting in Sofia, Bulgaria.

What you'll actually take home

Competitive – discussed at interview

Bulgaria applies a flat 10% income tax, and living costs in Sofia, Plovdiv and Varna run well below Western European levels — the take-home goes considerably further than the headline suggests.

Everything else in the package

You also get senior-level position within a growing international sports betting technology company, opportunity to develop the core systems behind real-time, high-traffic betting products, modern technology stack and engineering-focused working environment, high level of ownership over backend architecture and technical solutions, opportunity to influence scalability, performance, and platform development, collaborative international engineering team, professional development and career growth opportunities, and exposure to complex real-time data and high-volume transactional systems.

The job itself

CloserHire is partnering with a fast-growing international technology company within the sports betting and iGaming industry to recruit a Senior Back-End Engineer for their team in Sofia, Bulgaria. This is an opportunity to work on high-performance, real-time sports betting products, building the systems and services that power complex betting operations. You will take ownership of backend development, architecture, integrations, and performance while working in an engineering environment where scalability, reliability

Day to day that means design, develop, and maintain high-performance backend services and applications, build scalable systems capable of handling high volumes of real-time transactions and data, develop and maintain APIs, microservices, and integrations with internal and third-party systems, contribute to the architecture and continuous evolution of the company’s sports betting platform, work with real-time sports data, betting feeds, pricing, and other platform integrations, design reliable solutions capable of supporting significant traffic during major sporting events, and optimise backend services for performance, scalability, availability, and security.

What you need to bring

• Strong analytical and problem-solving skills
• Good understanding of application security, monitoring, logging, and performance optimisation
• Strong understanding of software architecture, design patterns, and clean coding principles Experience with Git, CI/CD pipelines, automated testing, and modern development workflows Familiarity with Docker, Kubernetes, AWS, or other cloud technologies is highly advantageous
• Experience with messaging technologies such as Kafka, RabbitMQ, or similar is an advantage
• Good understanding of distributed systems, asynchronous processing, and event-driven architectures
• Experience developing high-traffic, high-availability, or real-time applications
• Strong knowledge of relational and/or NoSQL databases such as PostgreSQL, MongoDB, Redis, or similar

Life in Bulgaria

A flat 10% income tax and some of the lowest living costs in the EU — your salary stretches a long way.

Next steps

• Send us your CV and we will come back to you either way
• A relaxed 30-minute conversation to check the role genuinely fits
• The company's own interview stage
• Offer and contract — we stay involved through paperwork and arrival

Around five weeks from applying to your first day on the ground.

CloserHire recruits for this role on behalf of our client. We are an equal-opportunity recruiter and consider every applicant on ability alone.