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I will build golang backend apis and microservice
Stepan H.
About this gig
A Go backend should do more than return 200 OK. It should handle real business logic, protect data and stay maintainable as your product grows.
Need an engineer who understands the product, not just someone who follows tickets? I clarify requirements, choose a practical architecture, solve root causes and keep you updated without making you manage every technical detail.
I build backend services with Go, Gin and net/http:
REST APIs and business logic
PostgreSQL, data modelling and queries
JWT authentication and role-based access
Third-party API integrations
Microservices and service communication
Validation, error handling and automated tests
Swagger/OpenAPI documentation and Docker
Im a full-stack engineer with 5+ years of commercial freelance experience, 200+ completed orders and 55 positive reviews. I focus on clean, predictable code and technical decisions that fit your product not unnecessary complexity.
Need a new API, an additional service or help fixing an existing Go codebase? Message me with your idea, requirements or repository. Ill review the scope, suggest a practical approach and provide a free estimate before you order.
Get to know Stepan H.
Stepan H.
Full Stack Software Engineer
- FromGermany
- Member sinceJan 2022
- Avg. response time1 hour
Languages
English, Russian
Full-stack software engineer with 5+ years in freelance development, 200+ completed orders and 55 positive reviews on a previous platform. I work solo end-to-end, from requirements to deployment. My focus is React, Next.js and TypeScript, including SSR/SSG, App Router and performance optimization. I build Node.js backends, PostgreSQL databases, integrations and automation, plus Go and PHP solutions. For larger projects, I lead a team with a full-stack developer and designer. I also support existing teams with backend work, debugging and code reviews.
Have a project in mind? Message me.
My Portfolio
FAQ
Can I get a free estimate before placing an order?
Absolutely. Send me your idea, requirements or existing codebase. I'll review the scope, suggest a practical technical approach and provide a free, no-obligation estimate with an approximate timeline before you order.
Can you turn my AI-generated MVP into a production-ready backend?
Yes. I've worked on multiple AI-generated MVPs, from bug fixes, refactoring and architecture improvements to complete rebuilds. I'll review your Go code, identify what needs fixing or replacing, and recommend the best path to production.
Can you take over an existing Go project?
Yes. I can review an existing codebase, fix bugs, refactor problematic parts, add features or continue development. I'll first assess the project and agree on a clear scope before making changes.
Can you build a custom REST API with Go?
Yes. I build Go REST APIs using Gin or the standard net/http package, with structured routing, request validation, business logic, database access and consistent error handling.
Can you develop microservices in Go?
Yes. I can build individual Go services and API integrations for a microservice-based system. Message me with your architecture and requirements so I can assess the service boundaries, communication and scope.
Which databases do you work with?
I work with PostgreSQL, including schema design, data modelling, queries and database integration. I can also connect your Go service to an existing database and work with its current structure.
Can you implement authentication and role-based access?
Yes. I can implement JWT-based authentication, password hashing, protected routes, role-based access control (RBAC) and permission checks, based on your application's requirements.
Can you integrate third-party APIs?
Yes. I can connect external REST APIs, handle authentication, map and validate data, process webhooks and implement error handling. Please share the API documentation if available.
Can you fix bugs or improve the performance of my Go backend?
Yes. I can investigate bugs, profile performance bottlenecks, review database queries and improve code structure. I'll first identify the cause and confirm the scope before making changes.
Do you provide tests, API documentation and deployment?
Yes. Automated tests, Swagger/OpenAPI documentation and Docker setup can be included depending on the package or custom scope. Deployment and infrastructure work can be quoted separately.
