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TALENT-77612
Harun
Sr. Backend engineer
Senior
Turkey
Professional Summary
Candidate is a Senior Backend Engineer with over 7 years of experience specializing in scalable backend systems, microservices architecture, and event-driven communication across industries including industrial automation, pharmaceuticals, software development, and information technology. Skilled in designing high-performance distributed systems using messaging queues such as RabbitMQ, Kafka, and NATS, with a strong command of Node.js, TypeScript, PostgreSQL, MongoDB, and Redis. Demonstrated expertise in decomposing monolithic applications into modular microservices, implementing service discovery, and optimizing system reliability with outbox/inbox and retry patterns. Proficient in developing and maintaining REST APIs, building CI/CD pipelines, and introducing standardized design and development practices. Experienced in NLP-driven chatbot development with Rasa and real-time system integration using WebSocket and event buses. Adept at mentoring engineers, leading backend architecture improvements, and delivering robust backend solutions for mission-critical systems, including autonomous robotics platforms and supply chain infrastructure.
Video of Talent
Portfolio
Education
Firat University / Faculty of Technology, Software Engineer
2011 - 2016
Certifications and Trainings
Experience
Senior Backend Engineer
Industry: Industrial Automation
Oct 2024 – Present
• Designing and implementing event-driven dynamic service discovery using NATS KV store.
• Building in-memory queue system for NATS message retries.
• Developing event-bus module with NATS and WebSocket for real-time frontend and IoT updates.
• Creating REST-based map service for generating and managing map data.
• Implementing centralized config service for scalable device and settings management.
• Establishing code standards, branching strategies, and review policies.
Lead Full-stack Engineer
Industry: Software Development
Sep 2023 – Oct 2023
• Led maintenance and enhancements of Volt/VAR automation system.
• Implemented proxy pattern in service discovery to resolve connection issues.
Senior Backend Engineer
Industry: Pharmaceutical Manufacturing
May 2024 – Jul 2024
• Completed migration to internal order service module.
• Migrated open-source npm packages to internal packages for improved maintainability.
Senior Backend Engineer
Industry: Technology, Information and Internet
Sep 2019 – Sep 2023
• Designed hybrid distributed system architecture with saga, outbox, and inbox patterns.
• Architected secure and resilient queue-based messaging system with retry logic.
• Developed distributed caching layer to improve inter-microservice performance.
• Engineered versioning and CI/CD pipeline for internal npm packages.
• Led migration from HapiJs to NestJs for scalability and maintainability.
• Documented and standardized design patterns and business workflows.
• Mentored junior engineers in DDD and event-driven architecture.
• Integrated key services such as SAP purchase orders and e-waybill.
• Developed critical REST APIs for inventory, supply chain, and product transfer.
• Created robust unit and integration tests using Jest.
Full-stack Engineer
Industry: Information Technology & Services
Apr 2018 – Sep 2019
• Developed AI-powered chatbot with Rasa NLP for psychological diagnostics.
• Built admin panels for public transit and traffic data visualization.
• Engineered computer vision libraries across multiple programming languages.
• Designed plugin for real-time IoT event streaming to Thingworx platform.
