Senior Full Stack Engineer (React + Node.js + CRM) – Remote

About the role

FullStackFullStack is looking for a Senior Full Stack Engineer to join its talent network and work on remote, project‑based assignments for U.S. clients. You will become an integral part of the client’s engineering team, collaborating daily with designers, product managers, and marketers.

Key responsibilities

• Develop and maintain full‑stack JavaScript/TypeScript applications using React and Node.js.
• Implement server‑side rendering solutions such as Next.js.
• Design, build, and optimize reliable backend APIs and service‑to‑service integrations.
• Integrate and maintain CRM platforms, primarily Salesforce, including data migrations and custom logic.
• Connect third‑party marketing and analytics tools (e.g., HubSpot, Google Analytics, Statsig, Optimizely).
• Ensure performance, testing, and observability using tools like Jest, Cypress, Playwright, New Relic, Sentry, and Datadog.
• Participate in Agile/Scrum ceremonies and contribute to continuous integration and delivery pipelines.

Required profile

• 5+ years of professional software engineering experience.
• 3+ years in technical leadership, influencing architecture and mentoring peers.
• Advanced English proficiency.
• Completed a four‑year college degree.
• Proven ability to work independently, take ownership, and solve complex problems.

Required skills

• React
• Node.js
• JavaScript / TypeScript
• Next.js
• AWS (Lambda, API Gateway, S3, CloudWatch)
• Salesforce CRM
• HubSpot, Google Analytics, Statsig, Optimizely
• Jest, Cypress, Playwright
• New Relic, Sentry, Datadog
• CI/CD pipelines

What we offer

• Flexible, remote project‑based work with U.S. clients.
• Access to a transparent talent network and professional growth opportunities.
• Collaboration with innovative teams across the Americas.