Senior Fullstack Engineer (Node.js + React.js) to take full hands-on ownership of end-to-end feature development in a product-based SaaS environment. This is a senior individual contributor role at OnHires focused on building and scaling internal B2C digital products with no people-management responsibilities.
What You'll Do
- Build and deliver complex features end-to-end using Node.js, NestJS, React.js, Next.js, TypeScript
- Design and implement scalable backend services and secure REST APIs
- Develop performant frontend components, SSR flows, routing, and state management
- Write clean, maintainable, well-tested code
- Participate in architectural discussions within the product team
- Implement and refine logging, monitoring, and alerting (Sentry, Datadog, Groundcover)
- Troubleshoot and optimize backend and frontend performance
- Participate in incident resolution and root-cause analysis
- Improve system reliability, traceability, and error visibility
- Maintain and enhance CI/CD pipelines (including GitHub Actions)
- Work with DevOps to ensure consistent and stable environments across dev/staging/production
- Manage and contribute to Git branching strategies (Git Flow or Trunk-Based Development)
- Ensure smooth, efficient, predictable deployment workflows
What We're Looking For
- 5+ years of professional full-stack engineering experience
- Strong production experience with Node.js, NestJS
- Strong production experience with React.js, Next.js
- Strong production experience with TypeScript
- Solid PostgreSQL knowledge (data modeling, optimization, indexing)
- Strong experience with AWS services (Lambda, S3, CloudWatch, SNS/SQS or equivalents)
- Experience building secure REST APIs (JWT auth, security best practices)
- Understanding scalable architectures and distributed systems basics
- Hands-on experience with CI/CD pipelines and GitHub Actions
- Docker experience
- Experience managing Git branching strategies (Git Flow / Trunk-Based Development)
Nice to Have
- Kubernetes (K8s)
- ArgoCD or GitOps workflows
- Event-driven systems (Kafka, RabbitMQ, AWS SNS/SQS)
- Infrastructure as Code (Terraform)
- Observability tooling (Sentry, Datadog, Groundcover)
- Experience with design systems / Storybook
- Experience with internal utilities or shared packages
- Experience with test automation frameworks (Playwright or similar)
Technical Stack
Node.js, NestJS, React.js, Next.js, TypeScript, PostgreSQL, AWS (Lambda, S3, CloudWatch, SNS/SQS), REST APIs, JWT, GitHub Actions, Docker, Git, Sentry, Datadog, Groundcover, Kubernetes, ArgoCD, Kafka, RabbitMQ, Terraform, Storybook, Playwright
Team & Environment
Senior, autonomous engineering culture focused on product impact
Benefits & Compensation
- Competitive compensation
- 22 paid vacation days + national holidays
- Annual learning & development budget (courses, certifications, conferences)
- Opportunity to contribute to a fast-growing multi-product SaaS environment
- Modern technology stack with minimal legacy
Work Mode
Remote, Full-time, B2B contract
We are an equal opportunity employer and welcome diversity in the workplace.
