Макс

MAKSYM PINYAZENKO
GO BACKEND DEVELOPER | AI-ASSISTED ENGINEERING
Kyiv, Ukraine (UTC+3) | Remote | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)
Telegram: @maks_pinyazenko | LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація») | GoLab:
github.com/jamaan01/programming-course-website
PROFESSIONAL SUMMARY
Go backend developer with 2 years of freelance experience building web applications, REST APIs, PostgreSQL data
models, authentication, payment integrations, and automated workflows. Built and launched GoLab, an online learning
platform used by real learners. Uses OpenAI/ChatGPT, Codex, and Claude for architecture, implementation, debugging,
testing, and documentation, with manual review of generated code.
PROFESSIONAL EXPERIENCE
Freelance Go Backend and AI-Assisted Developer
Self-employed | Remote | 2024 - Present
• Built a one-page course sales website for a client and connected the purchase flow to online payment and automatic
course access.
• Replaced manual payment verification and enrollment with an automated checkout-to-delivery workflow, allowing
customers to buy and receive access without waiting for the course owner.
• Created an always-available self-service sales channel that improved course monetization and reduced the owner's
involvement in each purchase.
• Designed backend workflows and integration points for client projects, translating requirements into data flows, application
logic, validation, error handling, testing, and working releases.
• Used OpenAI/ChatGPT, Codex, and Claude for architecture research, implementation, debugging, refactoring, test
planning, and documentation; reviewed generated solutions before delivery.
SELECTED BACKEND PRODUCT
Go Backend Developer | GoLab Online Learning Platform
Go, Gin, PostgreSQL, REST APIs, JWT
• Built and launched a platform used by real learners, delivering 18 REST endpoints for registration, authentication, course
management, enrollment, lessons, and progress tracking.
• Chose a layered Go/Gin structure for handlers, domain logic, middleware, configuration, and database access, keeping
responsibilities separated as the product grew.
• Designed a 6-table PostgreSQL schema for users, courses, modules, lessons, enrollments, and individual learning
progress, giving each workflow a clear source of data.
• Implemented JWT authentication and role-based authorization across public, learner, and admin routes, protecting profile,
enrollment, progress, and content-management operations.
TECHNICAL SKILLS
Backend: Go (Golang), Gin, REST APIs, JWT, RBAC, middleware, application architecture, API integration
Data and Integrations: PostgreSQL, SQL, relational schema design, payment integration, data validation
AI and LLM: OpenAI/ChatGPT, Codex, Claude, prompt and context design, AI-assisted coding, debugging, test planning,
output validation
Tools and Quality: Docker, Git, GitHub, Postman, Go testing package, API testing, error handling, refactoring, documentation
Additional: Familiar with gRPC and microservice concepts
EDUCATION
Bachelor's Degree in Computer Systems and Technologies
Odesa Polytechnic National University

LANGUAGES
English: B2 (Upper-Intermediate)