21.09.2026 aktualisiert
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Full-Stack Product Engineer | Next.js, Node.js, PostgreSQL | SaaS & Automation
Минск, Belarus
Nur Remote
Hochschulabschluss (BSUIR) – Informatik / SoftwareentwicklungÜber mich
Full-Stack Product Engineer building production SaaS, internal systems and automation. I work across architecture, frontend, backend, PostgreSQL, APIs and integrations, and can take ownership of existing codebases or new product modules.
Skills
AI AgentsTailwind CSSLLMJavaScriptAPIsSaasCRM-SystemeGitHubPostgreSQLNode.jsSoftware ArchitectureNext.jsTypeScriptBackendGit
Full-Stack Product Engineer focused on production SaaS products, internal business systems, automation and API-driven applications.
I work across the full product engineering lifecycle: system architecture, database design, backend APIs, frontend applications, integrations, testing, deployment and production hardening.
CORE STACK
Frontend:
Next.js, React, TypeScript, JavaScript, Vite, HTML, CSS, Tailwind CSS, responsive interfaces, dashboards, admin panels
Backend:
Node.js, REST APIs, authentication and authorization, RBAC, background jobs, webhooks, third-party integrations, idempotent workflows
Data:
PostgreSQL, relational data modelling, migrations, multi-tenant systems, transactional workflows
Product Engineering:
SaaS, MVP development, internal tools, CRM systems, client portals, marketplaces, admin systems, multi-tenant applications
Integrations & Automation:
Payment integrations, external APIs, Telegram Bots, Telegram Mini Apps, AI/LLM integrations, workflow automation
Engineering:
System architecture, API design, Git, GitHub, Docker, CI/CD, Playwright, automated testing, code review, debugging, refactoring, performance optimization
SELECTED EXPERIENCE
• SaaS and marketplace product development
• FinTech product engineering
• Booking and operations platforms
• CRM and internal business systems
• AI-assisted workflows and automation
• Existing codebase takeover and product rescue
• Architecture and technical delivery from MVP to production
I am comfortable joining an existing engineering team or taking ownership of a defined product area independently.
Typical engagements include:
• Building or completing an MVP
• Developing new product modules
• Taking over an existing codebase
• Backend/API development
• React/Next.js frontend development
• PostgreSQL architecture and data modelling
• SaaS and multi-tenant architecture
• Third-party API integrations
• Business process automation
• Production stabilization and technical debt reduction
Technologies:
TypeScript, JavaScript, React, Next.js, Node.js, PostgreSQL, REST API, Docker, Git, GitHub, Playwright, Tailwind CSS, Vite, SaaS, CRM, AI, LLM, Telegram Bot, Telegram Mini App, API Integration, CI/CD
Erfahrung
Berufserfahrung0 - 5 Jahre
Freelancer seit2024
Sprachen
EnglishMutterspracheRussianMuttersprache
Projekthistorie
Building and shipping production SaaS products, marketplaces, CRM systems and internal tools, owning requirements, architecture, React/Next.js interfaces, Node/NestJS APIs, relational data models and releases. Implementing authentication, RBAC/RLS, admin dashboards, subscriptions, payment and transactional workflows, plus Telegram and email automation across PostgreSQL/Supabase and SQL Server systems. Deploying and operating applications on Vercel, Railway and Windows Server with Docker, PM2, Caddy and HTTPS. Working directly with clients to translate business processes into scoped product flows.
Built core areas of a production marketplace including catalog and buy flows, user dashboards, operator/admin systems, authentication, 10+ roles, KYC/compliance workflows and USDT TRC-20 payment requisites. Diagnosed multi-second navigation latency across SSR/BFF, session refresh and database/network paths; replaced sequential market lookups with SQL aggregation and parallelized release queries to reduce database round-trips. Tech stack: Next.js, TypeScript, NestJS, PostgreSQL, Prisma.
Delivered a responsive booking product with client, master and platform_admin roles, onboarding, public profiles, service catalog, availability/slots, Free/Pro subscriptions, a 7-day trial, bePaid lifecycle and Telegram Mini App. Built Playwright E2E coverage for the eight-step master onboarding and profile publication flow on mobile and desktop; debugged production UI interaction and scheduling issues. Tech stack: React.js, Vite, Supabase, Railway, Playwright.