Senior Fullstack Engineer, Node

Role Description

Our client is looking for a Senior Fullstack Engineer to help evolve a mature, mission-critical platform. You will work predominantly on the backend in Node.js while also contributing to frontend integrations, UI features, and overall system design.

This is a large, existing system with real constraints, legacy decisions, and high expectations around reliability and performance. You’ll collaborate with experienced engineers to ship features end-to-end, reduce operational friction, and steadily improve the architecture over time.

What You’ll Do

• Fullstack Development
  • Build and maintain backend services in Node.js, including serverless components (for example, functions-as-a-service and API gateways)
  • Design and integrate APIs that power web frontends, partner integrations, and AI-augmented features
  • Contribute to frontend work using modern state management and interaction patterns, with an emphasis on accessibility and keyboard-friendly UI
  • Write clean, well-structured, and well-tested code with a strong focus on automated unit and integration tests
• Workflow & System Orchestration
  • Support the design and maintenance of workflows using orchestration tools such as workflow engines or state machines
  • Contribute to event-driven and asynchronous processing using queues, pub/sub, or similar messaging patterns
  • Improve reliability by strengthening error handling, retries, and failure recovery paths
• Backend & API Engineering
  • Develop and evolve RESTful APIs within a modular or microservices-style architecture
  • Integrate with large internal and external systems, including data platforms and institutional services
  • Help optimize performance and scalability of services, including thoughtful schema and access-pattern design for SQL or NoSQL stores
  • Implement secure data handling practices aligned with privacy and compliance expectations
• System Reliability & Support
  • Investigate and resolve issues in production environments, collaborating with more senior team members where needed
  • Contribute to logging, monitoring, and debugging workflows so the team can see and trust what the system is doing in real time
  • Support deployment and release processes in a cloud-native environment, including reviewing and improving pipelines over time
• Collaboration & Growth
  • Work closely with distributed, cross-functional teams building large-scale platforms in domains such as education, financial services, or enterprise SaaS
  • Participate in code reviews, design sessions, and technical planning
  • Take ownership of features spanning UI, API, and data layers, driving them from definition through to production rollout
  • Continually grow your skills, staying current with modern Node.js, cloud, and frontend practices

Qualifications

• At least 4 to 6+ years of professional software engineering experience in production environments
• Strong experience with Node.js in backend or fullstack roles
• Experience delivering fullstack features end-to-end (frontend, backend, and data layers)
• Exposure to workflow orchestration or state-machine tools
• Solid understanding of API design, backend architecture, and integration patterns
• Experience with at least one major cloud platform (AWS preferred) and serverless-style architectures
• Familiarity with relational and/or NoSQL databases and scalable data modeling
• Comfortable working in and improving a large existing codebase

Nice to Have

• Experience with Python in production systems
• Exposure to event-driven architectures (queues, streams, pub/sub)
• Familiarity with AWS services such as Lambda, SQS, Step Functions, or similar offerings on other clouds
• Experience with CI/CD pipelines and infrastructure-as-code
• Exposure to AI/LLM-backed features or data-driven platforms
• Experience on distributed, remote-first teams
• Background in building accessible, user-centric frontends with modern frameworks

Why This Role Is Interesting

• You work on a live, scaled platform with real users and non-trivial constraints—this is about hardening and extending serious systems, not churning out throwaway MVPs
• You’ll collaborate with senior engineers across backend, frontend, and infrastructure, and gain deep exposure to modern cloud and orchestration patterns
• The environment values thoughtful engineering, pragmatic architecture, and end-to-end ownership