Backend Engineer - Duomo
RemoteKyiv, Kyiv City, Ukraine
Job Summary
Design and scale backend services to automate marketing technology processes and integration workflows. Build robust tools that streamline creative operations by automating the asset lifecycle. Implement comprehensive tracking, metrics, logs, and tracing to ensure high system visibility and performance monitoring. Expand test coverage across unit, integration, and end-to-end scenarios while setting up automated pipelines for fault tolerance. Participate in system architecture design, code reviews, and performance optimization to support business growth. This Middle Node.js Developer role at Duomo, a partner company within SKELAR's venture builder ecosystem, focuses on transitioning the product into a connected spiritual platform.
Required Qualifications
- 2+ years of experience with Node.js + TypeScript & NestJS
- PostgreSQL + any typed ORM (Drizzle, Prisma, or TypeORM)
- Redis & Message Queues (BullMQ, RabbitMQ, or SQS) — hands-on experience with idempotency, retries, and distributed locks
- Third-party REST API integrations — handling rate limits, pagination, and partial failures
- Docker, CI/CD, and unit testing with Jest
Desired Qualifications
- Experience with Facebook Marketing API, Google Ads API, or other ad platforms (TikTok, Applovin)
- Cloud & Infra: AWS (ECS, ECR, S3, Lambda) and GitHub Actions
- Observability: Prometheus, Grafana, and structured logging
- Integrations with Airtable API and Google Sheets API
- Practical experience with LLM APIs (Claude, Gemini) — structured output and prompt versioning
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