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