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Senior Full-Stack JS/TS Developer


About the client

Our client is a visionary Sweden-based tech company redefining the AdTech landscape through their innovative Creative Management Platform. Their cutting-edge solution empowers businesses to design, scale, and publish high-impact advertising campaigns entirely in-house. By merging robust technology with creative freedom, they enable brands to stay ahead of market trends and execute cross-channel strategies with unparalleled speed and agility.

Responsibilities

  • End-to-End Delivery: Design, develop, and ship robust features across both the frontend and backend, maintaining full ownership of the feature lifecycle.
  • Frontend Development: Build modular, scalable, and high-performance user interfaces leveraging React (or equivalent modern frameworks like Vue, Svelte, or Angular), incorporating micro frontends and managing monorepo structures.
  • Backend Architecture: Develop scalable backend services and high-throughput HTTP APIs using Node.js or alternative modern languages (Go, Python, C#, Java).
  • Asynchronous Messaging: Implement and maintain event-driven systems utilizing enterprise message queues and brokers such as Azure Service Bus, Kafka, RabbitMQ, or SQS.
  • AI Integration: Design and embed agentic workflows into product ecosystems, leveraging advanced AI tooling, subagents, skills, and Model Context Protocol (MCP).
  • Data Modeling: Architect and optimize data storage solutions utilizing MongoDB and other NoSQL databases.
  • DevOps & Automation: Maintain and optimize automated deployment pipelines using GitHub Actions to support regular high-quality production releases.
  • System Observability: Implement comprehensive application monitoring and distributed tracing using tools like New Relic or OpenTelemetry to proactively address system bottlenecks.

Requirements

  • Fullstack Engineering Mindset: Proven track record of shipping production-grade software on both sides of the stack with a strong desire to continue working concurrently across frontend and backend environments.
  • Type-Safe Engineering: Strong proficiency in TypeScript across the entire ecosystem, or an expert-level understanding of an equivalent strongly-typed language.
  • Modern Web Frameworks: Strong hands-on experience with React (strongly preferred), Vue, Svelte, or Angular.
  • Event-Driven Architecture: Practical experience designing, building, and debugging distributed, event-driven messaging pipelines (Azure Service Bus, Kafka, RabbitMQ, SQS).
  • Database Management: Deep familiarity with MongoDB or equivalent NoSQL database platforms.
  • AI Tooling & Automation: Hands-on experience working with or building agentic systems, AI-driven subagents, skills orchestration, and MCP integrations.

As a plus

  • Experience managing complex monorepos and deploying micro frontend architectures.
  • Strong background in infrastructure observability, distributed tracing, and system health instrumentation (New Relic, OpenTelemetry).
  • Proficiency in configuring and maintaining advanced CI/CD automation pipelines via GitHub Actions.

We offer

  • Competitive salary and benefits.
  • Flexible working hours.
  • Vacation – 20 working days’ annual leave.
  • Paid sick days.
  • A personal laptop with all the essential software installed.
  • State holidays are granted.
  • Corporate accountant, lawyer, and psychologist services.
  • Bureaucracy-free and transparent management.
  • Costs related to participation in workshops and professional conferences are covered.
  • In-house and online сorporate English classes.
  • Corporate parties 2 times a year and team-building events

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    Job details

    Senior Full-Stack JS/TS Developer

    Kyiv, Remote, Warsaw

    Upper-Intermediate



    Location

    Kyiv, Remote, Warsaw

    Job type

    Full time

    English level

    Upper-Intermediate

    Date posted

    Aug 28, 2026