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Київ, Україна
Hybrid
United Tech is a global IT product company shaping the future of real-time social connection. With millions of users across North America, Europe, LATAM, and MENA, we build next-gen mobile and web apps for live-streaming and social networking. Our platforms enable connection at scale — fast, interactive, and deeply engaging. The market is projected to exceed $206B by 2030, and we are already leading the evolution. Founded in Ukraine, scaling worldwide.
About the role: We're looking for a Node.js Backend Developer to join the backend team. You'll be building the infrastructure that powers revenue and growth — from web billing integrations with payment providers to server-side marketing pipelines that fuel acquisition. If you thrive in high-load, product-driven environments where your code ships to real users and directly impacts the bottom line, this role was made for you.
Develop and ship web billing integrations: payment providers, subscriptions, recurring billing, webhook handling (idempotency, retries, reconciliation)
Develop and ship marketing integrations: attribution platforms, server-side conversion/events APIs, analytics and CRM/ESP pipelines
Create technical designs for product epics and decompose them into actionable tasks
Participate in team processes: grooming, sprint planning, estimations
Run investigations and tech research (3rd-party API limits, provider selection, edge cases)
Address tech debt and improve reliability and observability of integrations
Take part in the full SDLC: design, dev, code review, testing, release, support
3+ years of commercial backend development experience
2.5+ years with Node.js (TypeScript)
Solid experience with relational and non-relational databases (PostgreSQL, MongoDB, Redis)
Experience with SOA/microservices: inter-service communication and dev process
Strong fundamentals in design principles and patterns (SOLID, event-driven)
Experience integrating third-party REST APIs: auth, rate limits, retries, webhooks, idempotency
Experience with async processing / message queues (BullMQ, RabbitMQ or Kafka)
Experience with a cloud provider (AWS / GCP)
Understanding of scaling and high-load systems
Daily use of AI coding assistants (Claude Code, Cursor, GitHub Copilot) for development, refactoring, tests, and documentation
Ability to write effective prompts and review/validate AI-generated code — quality and security ownership stays with you
Hands-on web billing / payment integrations (Stripe, Paddle, Solidgate, Recurly, Braintree, PayPal) and subscription/recurring-billing logic
Payments domain knowledge: 3DS, PCI-DSS basics, chargebacks/fraud, dunning, reconciliation
Marketing/growth integrations: AppsFlyer/Adjust, Meta CAPI, Google/TikTok events APIs, S2S postbacks
Experience with analytics/event pipelines and CRM/ESP tools
DDD / CQRS, WebSockets (ws, socket.io)
Understanding of how to integrate LLM APIs into product features
Care and support:
Comfortable working environment:
Investment in your future:
Intro call
Technical interview
Final Interview
Reference check
Offer
