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I am Tolga Celik, a passionate full stack and backend engineer with 10+ years of experience designing and delivering large-scale distributed systems, high-performance microservices, and resilient enterprise applications. I thrive on ownership, hands-on work with Java, Spring Boot, API design, and system optimization, delivering reliable, observable, and maintainable solutions used by millions. I am dedicated to code quality, scalability, and data-driven engineering decisions, and I enjoy mentoring junior developers while driving technical improvements across teams. I am ready to contribute at a senior level with a bias toward engineering excellence, cross-team collaboration, and long-term design thinking, while continuing to grow my technical leadership and impact across product domains.…I am Tolga Celik, a passionate full stack and backend engineer with 10+ years of experience designing and delivering large-scale distributed systems, high-performance microservices, and resilient enterprise applications. I thrive on ownership, hands-on work with Java, Spring Boot, API design, and system optimization, delivering reliable, observable, and maintainable solutions used by millions. I am dedicated to code quality, scalability, and data-driven engineering decisions, and I enjoy mentoring junior developers while driving technical improvements across teams. I am ready to contribute at a senior level with a bias toward engineering excellence, cross-team collaboration, and long-term design thinking, while continuing to grow my technical leadership and impact across product domains.

Tolga Celik

Full Stack Developer, Back-End Developer, Web Developer, +2

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I am Tolga Celik, a passionate full stack and backend engineer with 10+ years of experience designing and delivering large-scale distributed systems, high-performance microservices, and resilient enterprise applications. I thrive on ownership, hands-on work with Java, Spring Boot, API design, and system optimization, delivering reliable, observable, and maintainable solutions used by millions. I am dedicated to code quality, scalability, and data-driven engineering decisions, and I enjoy mentoring junior developers while driving technical improvements across teams. I am ready to contribute at a senior level with a bias toward engineering excellence, cross-team collaboration, and long-term design thinking, while continuing to grow my technical leadership and impact across product domains.…I am Tolga Celik, a passionate full stack and backend engineer with 10+ years of experience designing and delivering large-scale distributed systems, high-performance microservices, and resilient enterprise applications. I thrive on ownership, hands-on work with Java, Spring Boot, API design, and system optimization, delivering reliable, observable, and maintainable solutions used by millions. I am dedicated to code quality, scalability, and data-driven engineering decisions, and I enjoy mentoring junior developers while driving technical improvements across teams. I am ready to contribute at a senior level with a bias toward engineering excellence, cross-team collaboration, and long-term design thinking, while continuing to grow my technical leadership and impact across product domains.

Available to hire

I am Tolga Celik, a passionate full stack and backend engineer with 10+ years of experience designing and delivering large-scale distributed systems, high-performance microservices, and resilient enterprise applications. I thrive on ownership, hands-on work with Java, Spring Boot, API design, and system optimization, delivering reliable, observable, and maintainable solutions used by millions. I am dedicated to code quality, scalability, and data-driven engineering decisions, and I enjoy mentoring junior developers while driving technical improvements across teams.

I am ready to contribute at a senior level with a bias toward engineering excellence, cross-team collaboration, and long-term design thinking, while continuing to grow my technical leadership and impact across product domains.

Skills

Experience Level

Expert

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Expert

Expert

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Expert

Work Experience

Full Stack Developer at Fidelity Investments

May 1, 2022 - Present

Led architectural discussions and designed end-to-end APIs using Java, Spring, and custom frameworks, and established Swagger documentation standards. Modernized legacy services into scalable microservices for easier deployments and improved maintainability. Delivered modular Micro Frontend applications and managed the full lifecycle from design and implementation to testing, production monitoring, and build optimization. Improved reliability and performance of Angular applications through refactoring and feature development. Mentored junior engineers and supported team technical upskilling.

Software Developer at Softtech

December 1, 2020 - April 1, 2022

Led delivery of a Kafka-based notification platform for a Turkish Bank, managing requirements gathering, implementation, deployment, and 24/7 production support. Built scalable, fault-tolerant event-driven systems using CQRS, enabling the platform to process millions of daily messages reliably. Developed full-stack features using Java and Angular, improving user experience and system responsiveness. Implemented monitoring and observability with Datadog and Grafana to reduce detection and response time.

Software Development Engineer at Amadeus

December 1, 2014 - December 1, 2020

Designed and deployed enterprise backend services using Java, Spring, Spring Boot, and Hibernate for high availability production systems. Improved SQL performance via indexing strategy improvements and optimized execution plans, reducing latency and load. Delivered enhancements, features, and fixes across backend APIs and AngularJS-based frontend components.