Middle Node.js Backend Developer

In this role, you will •

Develop and ship web billing integrations: payment providers, subscriptions, recurring billing, webhook handling (idempotency, retries, reconciliation)

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Develop and ship marketing integrations: attribution platforms, server-side conversion/events APIs, analytics and CRM/ESP pipelines

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Create technical designs for product epics and decompose them into actionable tasks

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Participate in team processes: grooming, sprint planning, estimations

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Run investigations and tech research (3rd-party API limits, provider selection, edge cases)

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Address tech debt and improve reliability and observability of integrations

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Take part in the full SDLC: design, dev, code review, testing, release, support

It's all about you •

3+ years of commercial backend development experience

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2.5+ years with Node.js (TypeScript)

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Solid experience with relational and non-relational databases (PostgreSQL, MongoDB, Redis)

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Experience with SOA/microservices: inter-service communication and dev process

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Strong fundamentals in design principles and patterns (SOLID, event-driven)

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Experience integrating third-party REST APIs: auth, rate limits, retries, webhooks, idempotency

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Experience with async processing / message queues (BullMQ, RabbitMQ or Kafka)

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Experience with a cloud provider (AWS / GCP)

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Understanding of scaling and high-load systems

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Daily use of AI coding assistants (Claude Code, Cursor, GitHub Copilot) for development, refactoring, tests, and documentation

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Ability to write effective prompts and review/validate AI-generated code — quality and security ownership stays with you

Would be a plus •

Hands-on web billing / payment integrations (Stripe, Paddle, Solidgate, Recurly, Braintree, PayPal) and subscription/recurring-billing logic

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Payments domain knowledge: 3DS, PCI-DSS basics, chargebacks/fraud, dunning, reconciliation

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Marketing/growth integrations: AppsFlyer/Adjust, Meta CAPI, Google/TikTok events APIs, S2S postbacks

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Experience with analytics/event pipelines and CRM/ESP tools

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DDD / CQRS, WebSockets (ws, socket.io)

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Understanding of how to integrate LLM APIs into product features

What we offer Care and support

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20 paid vacation days, 15 sick days, and 6 additional days off for family events

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Up to 10 additional days off for public holidays

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100% medical insurance coverage

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Sports and equipment reimbursement

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Team building events, corporate gifts, and stylish merch

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Financial and legal support

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Maternity recovery support allowance

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Position retention and support for those who join the Armed Forces of Ukraine

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Participation in social initiatives supporting Ukraine

Comfortable working environment

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Work from our Kyiv hub or remotely with a flexible schedule

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Modern equipment or depreciation of your own tools

Investment in your future

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Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche

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70% of our heads and leads have grown into their roles here – so can you!

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Performance-oriented reviews and Individual Development Plans (IDPs)

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Reimbursement for professional courses and English classes

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Corporate library, book club, and knowledge-sharing events

Hiring process •

Intro call

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Pre-screen

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Technical interview

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Final Interview

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Reference check

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Offer