Principal Performance Engineer (iGaming)

Who We Are

Recruitment.bg is a boutique IT recruitment company based in Bulgaria. We aim to work with the top employers in the industry—companies that we thoroughly vet and trust. Our mission is to guide IT professionals toward improved career paths by understanding their skills, crafting employment strategies, and supporting them every step of the way. Placing emphasis on honesty, respect, and reliability while delivering exceptional service by ‘going the extra mile,’ we build long-term relationships with the people and organizations we work with.

We’re looking for a Principal Performance Engineer to own the end-to-end performance strategy of a high-traffic, real-time platform.

This is a hands-on and strategic role focused on system stability, scalability, and low-latency performance across gaming and payment services.

What you’ll do

• Define and lead performance testing strategies (load, stress, scalability, endurance, capacity)
• Execute tests using JMeter, Gatling, k6, or similar tools
• Analyze latency, throughput, and scalability bottlenecks
• Produce clear performance reports with actionable recommendations
• Work closely with Dev, QA, DevOps, Infrastructure, and Architecture teams
• Optimize backend code, databases, test scripts, and infrastructure
• Improve observability via Grafana, Prometheus, ELK
• Define performance benchmarks, KPIs, and system health metrics
• Assess third-party integrations (payments, games) for performance risks
• Document performance strategies and remediation plans
• Mentor teams on performance engineering best practices

What we’re looking for

• 5+ years experience in performance and automation testing
• Strong hands-on experience with JMeter, Gatling, k6, or similar
• Programming/scripting skills in Java, Python, C#, or JavaScript
• Experience with APM tools (Dynatrace, New Relic, AppDynamics) is a plus
• Solid knowledge of SQL and database optimization
• Hands-on with Grafana, Prometheus, ELK, Splunk, or similar
• Strong analytical mindset and problem-solving skills
• Ability to communicate complex technical topics clearly
• Leadership mindset with mentoring experience

What’s offered

Competitive salary + annual performance bonus

Salary reviews twice per year

25 days paid leave

Flexible working hours & hybrid model (2 days remote)

Premium health insurance

Fully covered public transport & Multisport card

Free office shuttle

Trainings, seminars, and international conferences

Team events, office parties, and milestone bonuses

Modern office with relaxation zones (PS4, foosball, beanbags)

All applications are confidential. Only shortlisted candidates will be contacted.