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Bunyad A
@backenddevelopp
Senior backend developer, NET Core and Go, payment integrations and APIs
Turkey
English, Turkish, Azerbaijani
About me
I’m a Senior Backend Developer with 8+ years of experience building secure, scalable, and high-performance systems using .NET and Go (Golang). I specialize in REST APIs, microservices, payment integrations, distributed systems, and third-party API integrations. I work with PostgreSQL, Redis, RabbitMQ, Docker, Docker Swarm, Elasticsearch, and CI/CD. I follow Clean Architecture, SOLID, and DDD principles to deliver reliable, maintainable solutions. Need a backend, API integration, or performance improvement? Let’s build it right.
Skills
Bunyad A
Offline •
Average response time: 1 hour
See my services
Full Stack Web Applications
I will build your saas mvp backend with golang, vue js and postgresql
CRM & ERP Development
I will develop dynamics 365 CRM plugins, workflows and API integrations
Work experience
Senior Software Developer
ITT • Full-time
Mar 2023 - Jul 2026 • 3 yrs 4 mos
Led backend development for enterprise-grade CRM, ERP, payment, and business management platforms using Go (Golang), .NET Core, PostgreSQL, and Vue.js. Designed and delivered scalable, secure, and maintainable backend systems, with a strong focus on distributed architectures, payment infrastructure, system integrations, performance, and reliability. ### Key Responsibilities & Achievements • Developed scalable backend services and microservices using **Go (Golang), .NET Core, PostgreSQL, SQL, and Bun ORM**. • Designed and implemented **RESTful APIs**, database schemas, service integrations, and complex business workflows following **Clean Architecture, Domain-Driven Design (DDD), SOLID principles, and common design patterns**. • Designed **microservice and distributed system architectures**, including service-to-service communication, API Gateway / reverse proxy layers, and event-driven workflows. • Developed enterprise **CRM and ERP modules** covering payment processing, recurring/subscription billing, inventory management, approval workflows, accounting, donation management, sponsorship management, and reporting. • Built **event-driven and asynchronous processing systems with RabbitMQ**, including queues, background workers, message consumers, and reliable message processing. • Implemented distributed-system reliability patterns including **Outbox Pattern, Saga Pattern, idempotency, retries with backoff, circuit breakers, and fault-tolerant webhook processing**. • Integrated payment providers including **Craftgate, Stripe, and Kuveyt Türk Virtual POS**, covering payment flows, recurring payments, callbacks/webhooks, transaction status management, and duplicate-payment prevention. • Developed accounting and ERP integrations with **Mikro ERP** and other external systems. • Implemented secure **authentication and authorization** solutions using **Keycloak, OAuth 2.0, SSO, JWT, and role-based access control (RBAC)**. • Optimized **PostgreSQL database models,
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testle
Jordan
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nigarumarova
Turkey
Delivery was incredibly fast and it is clear that the person is extremely talented in software development. His exceptional understanding of the project and excellent communication skills made the whole process seamless. I would definitely be excited to work with him again on any future project.
$50
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Full Stack Web Applications
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