Senior Full Stack Developer

Senior Full Stack Developer — Apex Enterprise Solutions

Chicago, IL | January 2021 – Present

• Architected 12 Go-based microservices deployed to AWS ECS, utilizing gRPC and PostgreSQL to handle 45,000 requests per second and improve system throughput by 32%.
• Optimized database query performance by restructuring indexes and caching strategies with Redis, reducing query response times by 38% and saving $42,000 annually.
• Spearheaded migration of legacy frontend dashboards to React and TypeScript, improving core web vitals and reducing page load latency by 45% for 300,000 active users.
• Coordinated deployment automation workflows using Terraform and Jenkins, reducing application deployment failures by 35% and lowering time-to-market for new features.

Full Stack Developer — Summit Web Technologies

Evanston, IL | June 2016 – December 2020

• Designed 15 core RESTful API endpoints using Java and Spring Boot, boosting backend integration speed by 24% for over 500,000 active monthly platform users.
• Authored comprehensive unit and integration test suites using Jest and JUnit, expanding overall test coverage from 60% to 90% and preventing 18 post-release defects.
• Resolved messaging latency bottlenecks by implementing RabbitMQ queues, improving background transaction processing speed by 28% for concurrent system requests.
• Migrated 8 legacy internal portals to responsive web pages using Vue.js and Webpack, reducing browser memory usage by 30% and improving admin task execution speed.

Go, Java, TypeScript, JavaScript, React, Vue.js, Node.js, Spring Boot, AWS, Docker, Kubernetes, PostgreSQL, Redis, RabbitMQ, REST APIs, gRPC, CI/CD, Terraform, Git, Agile, Scrum

E-Commerce Gateway Modernization

Role: Lead Full Stack Architect

Tools: Go, React, AWS, Docker, PostgreSQL

Led the redesign of the user authentication and data ingestion pipelines, decreasing API response latency by 42% and reducing infrastructure hosting costs by 28%.

Enterprise Messaging Pipeline Integration

Role: Senior Software Engineer

Tools: Java, Spring Boot, RabbitMQ, Kubernetes

Guided the migration of inter-service communications to asynchronous messaging, resolving 95% of data loss during peak times and lowering queue processing delay by 50%.

• AWS Certified Solutions Architect – Professional (2023)
• Microsoft Certified: Azure Developer Associate (2021)
• IBM Full Stack Software Developer Professional Certificate (2020)

• Languages: English (Native), Polish (Conversational)
• Volunteer Work: Coding mentor for local high school STEM programs (2020-present)
• Availability: 2 weeks notice