Senior Fullstack Engineer, Node

Job Description This is a remote position. About the Company Our client is a product-focused engineering organization that builds large-scale digital platforms for customers with complex data, compliance, and integration requirements. They specialize in modern cloud-native systems that connect backend services, orchestration layers, and polished user experiences. Engineering is treated as a core capability, not a cost center: small senior teams, modern tooling, and a strong bias toward maintainable, observable systems. Their work spans long-lived platforms rather than short-lived prototypes, with real production traffic and users who rely on these systems every day. Role Overview 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 Requirements 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