Rafał Machnik

Resolved critical incidents and delivered high-priority fixes/features under tight deadlines, directly minimizing customer churn and improving client retention.

Contributed significantly to system stability, performance, and overall customer satisfaction through proactive problem-solving and robust solutions.

Leveraged AI tools (GPT, Codex, Cursor, Copilot) to accelerate development cycles, improve code quality, and automate repetitive tasks, boosting team efficiency.

Led the modernization of a large enterprise management system for wireless devices, successfully migrating a legacy monolith to modern standards while integrating new features.

Improved the overall security posture by effectively resolving critical vulnerabilities, enhancing system resilience and data protection.

Accelerated release cycles by enhancing SDLC processes, resulting in more frequent and reliable software deployments.

Architected and implemented a highly scalable, asynchronous, event-driven platform centered on Confluent Kafka for a UK insurance company's back-office system.

Ensured robust system scalability and resilience through meticulous design and implementation of distributed components.

Oversaw end-to-end cloud deployment and CI/CD pipelines, streamlining the development-to-production workflow and improving delivery efficiency.

Enabled on-time delivery of high-quality FX corporate sales and client solutions by serving as a full-stack developer and team lead within a fast-paced Investment Banking environment.

Mentored junior developers and applied eXtreme Programming (XP) practices, significantly reducing time-to-market for new features.

Advocated and implemented Domain Driven Design (DDD) principles to build scalable and maintainable systems, enhancing long-term architectural integrity and team productivity.

Led 3 cross-functional teams in developing and maintaining critical Java gaming components for William Hill, consistently meeting project deadlines.

Designed and delivered a new jackpot engine, optimizing performance and reliability at scale to handle high-volume transactions and ensure seamless user experience.

Coordinated cross-team delivery efforts and promoted best practices, enhancing collaboration and overall project efficiency.

Designed and developed a new online betting platform for a US gaming technology provider, ensuring robust functionality and user satisfaction.

Defined comprehensive requirements and coordinated complex development efforts, ensuring alignment with project goals and timely delivery.

Ensured system scalability to meet future growth, anticipating and accommodating increased user loads and market demands.

Adapted a complex margin management system to new financial regulations, ensuring full compliance and operational continuity for an investment bank.

Developed a new backend collateral management system for an Investment Bank, enhancing critical financial operations.

Leveraged Gigaspaces in-memory grid technology to achieve high-performance processing of complex financial data.

Contributed to initial software development projects, gaining foundational experience in Java technologies and enterprise software practices.