Senior Java Developer

About Traffic Label

Traffic Label is a fast-growing, data-driven technology company operating in the iGaming and affiliate marketing space, building scalable products focused on performance, analytics, and automation across global markets.

Role Overview

As a Senior Java Developer, you will play a key role in building and scaling high-performance backend services within a complex, data-driven environment. You will contribute to architecture decisions, system reliability, scalability, and security across our platforms, while working closely with cross-functional teams in a collaborative and fast-paced environment.

This role combines hands-on backend development with system design, performance optimisation, and technical leadership.

Key Responsibilities

• Build scalable, testable backend solutions independently from requirements through to production deployment
• Own services end-to-end and guide complex features through the full development lifecycle
• Integrate third-party services according to business and technical requirements
• Collaborate closely with Backend, Frontend, QA, and Infrastructure teams
• Contribute to architecture discussions and help shape the technical roadmap
• Mentor team members on best practices, troubleshooting, and system design
• Monitor, profile, and optimise application and database performance
• Design and execute high-load performance testing scenarios
• Work on complex SQL tasks and performance optimisation using PostgreSQL
• Handle large-scale datasets with a focus on scalability and reliability
• Troubleshoot production issues using logs, metrics, alerts, and monitoring tools

Skills & Experience

• Strong commercial experience with Java Core and Spring Framework / Spring Boot
• Proven experience designing scalable systems using RDBMS and SQL
• Hands-on experience with Docker and Kubernetes
• Strong understanding of JSON, JWT, HTTP(S), REST APIs, and WebSockets
• Practical experience with Netty and non-blocking I/O
• Experience working with logging, monitoring, profiling, and alerting tools
• Strong debugging and problem-solving skills
• Good understanding of system security best practices
• Intermediate English level or higher for international collaboration
• Experience working with high-load systems and performance optimisation
• Familiarity with technologies such as Kafka, GCP, Elasticsearch, Flyway, Grafana, and Kubernetes-based environments

What We Offer

• Full remote work flexibility
• Generous paid time off including vacation, sick leave, and public holidays
• Strong growth and career development opportunities
• Opportunity to work on scalable, high-performance systems using modern technologies
• Collaborative, international, and fast-moving environment