Senior FullStack Engineer (Node.js+React.js+GCP) to $5500

We’re looking for a JavaScript Engineer to join our growing team and lead the development of user interfaces and services that power marketing analytics, identity resolution, and cross-platform personalization.

What You’ll Do

• Build and maintain high-performance, scalable web applications using React.js, Node.js
• Work closely with Data Scientists to bring graph-based identity resolution, campaign analytics, and data activation to life.
• Develop UIs with advanced data visualization (e.g., using D3, Highcharts, and Recharts).
• Collaborate on multi-tenant architecture, OAuth-based integrations, and automated onboarding experiences using Auth0, Firebase, and Google Cloud Functions.
• Work with external teams to integrate features and deliver end-to-end value, including Stripe billing, Slack alerting, SendGrid messaging, and BigQuery pipelines.
• Champion UI/UX best practices while maintaining clean, maintainable code using ESLint, Prettier, and Husky-driven workflows.

Must-Have Qualifications

• 4+ years of experience with JavaScript and modern frameworks.
• 3+ years of experience with React.js, including hooks and context API.
• 3+ years of experience with Node.js, Express.js, and related tooling.
• Solid experience working in a Serverless environment (especially with Google Cloud Platform: Firebase, Functions, App Engine, API Gateway) is a must
• Deep understanding of REST APIs and third-party integrations (Things we use: Google Ads, Facebook Marketing API, Plaid, Stripe).
• Experience with CI/CD workflows using GitHub/GitLab pipelines.
• Familiarity with data visualization libraries (D3, Highcharts, Recharts).
• English: upper-intermediate level or higher.

Bonus Points

• Experience with Neo4j and graph data modeling (e.g., identity graphs).
• Knowledge of LaunchDarkly, Formik, Yup, and TailwindCSS.
• Prior work with OpenTelemetry, Sentry, or other observability stacks.
• Familiarity with Mongoose, MongoDB, BigQuery, and CDP tools.
• Experience building dashboards for analytics or marketing tech platforms

Tech Stack You’ll Work With

• Frontend: React, Vite, MUI, AntD, Tailwind, D3, Highcharts, Recharts, Formik, Yup
• Backend: Node.js, Express, Firebase, MongoDB, BigQuery, Auth0, Stripe, Slack APIs
• DevOps/Tooling: GitHub Actions, Husky, Prettier, ESLint, pnpm, Vitest, Jest
• Data & Observability: OpenTelemetry, Google Ads/Analytics APIs, Smartlook, Sentry
• Visualization & Reporting: Kendo PDF, jsPDF, xlsx, Venn.js

What We Offer:

• 4 weeks of paid vacation per year (with flexible scheduling)
• Unlimited sick leave — we trust your judgment and care about your health
• US Bank Holidays off — following the American holiday calendar
• A chance to work in a dynamic, multicultural team of professionals driven by a
• shared passion for product innovation and real impact
• A flat structure, no micromanagement, and full ownership of your work
• Remote-first culture and flexible working hours

Our Interview Process Is Simple and Fast:

1. Recruitment Screening Call

General conversation about your background, English check, and Q&A from your side.

2. Technical & Soft Skills Interview

Conducted by our Head of Delivery and Tech Lead.

3. Final Culture Fit Interview

General conversation in English with our CОO and CTO.

Why Join Us?

Be part of a product-first, data-driven startup reshaping martech

Work on modern tech with real ownership and creative freedom

Collaborate with senior-level professionals in a global, fast-moving environment

Ready to build the future of data-powered marketing with us?

Apply now and let’s talk!