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Salary
3500
EOR / Payroll from
€299 month
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Harun
Harun

Backend Developer

Senior

Turkey

Skills

PostgreSQL
RabbitMQ
Redis
MongoDB
Kafka

Languages

English B2
Available for hire from
3500

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.

Education

Firat University / Faculty of Technology, Software Engineer

2011 - 2016

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.

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