Senior / Principal Software Development Engineer
We are seeking a highly experienced Senior / Principal Software Development Engineer to support a large-scale Healthcare Communication Training Platform built on a modern MERN-stack architecture hosted within AWS. This is a hands-on engineering and technical leadership role focused on platform stabilization, architectural improvement, feature development, and long-term scalability. The ideal candidate brings deep expertise across full-stack JavaScript development, cloud-native AWS environments, and modern application architecture, while also being comfortable operating within complex, fast-moving client environments. This individual will work closely with technical leadership, project management, QA, DevOps, and business stakeholders to drive both ongoing maintenance efforts and new platform enhancements. This engagement includes ownership across two major phases: Platform stabilization, code audits, defect remediation, and architectural assessment New module development, workflow enhancements, reporting functionality, and platform modernization The role requires a strong balance of hands-on coding ability, technical strategy, problem-solving, and cross-functional collaboration. Engagement Details Fully Remote Contract / Consulting Engagement Healthcare & Learning Technology Environment Immediate Interview Availability Preferred Role Overview This role combines deep hands-on engineering with technical leadership responsibilities across a cloud-hosted healthcare learning platform deployed on AWS ECS Fargate using ReactJS, Node.js, MongoDB Atlas, and supporting AWS services. The position will support two key initiatives: Phase 1 – Platform Stabilization & Technical Assessment Conduct architecture and codebase audits Resolve critical defects and platform instability Improve environment parity across staging and production Support vendor transition and onboarding activities Improve testing, CI/CD reliability, and operational scalability Phase 2 – New Feature & Module Development Lead end-to-end development of new platform modules Extend user management workflows and reporting functionality Improve accessibility compliance across the application Drive scalable engineering standards and best practices
Key Responsibilities
Design, develop, test, and deploy scalable full-stack application features and enhancements Conduct detailed audits of existing systems and provide actionable remediation recommendations Lead development of new application modules from architecture through deployment Diagnose and resolve complex platform defects, performance bottlenecks, and deployment issues Maintain and extend AWS-based infrastructure and services including Cognito, Lambda, SQS, DynamoDB, ECS, and related workflows Design and maintain RESTful APIs and backend services using Node.js and Express.js Build and maintain accessible, responsive UI components aligned with WCAG 2.1 AA standards Write and maintain unit, integration, and E2E tests using Playwright, Jest, or Mocha Participate in sprint planning, backlog grooming, architecture discussions, and code reviews Create and maintain technical documentation, architecture diagrams, and environment configuration documentation Collaborate cross-functionally with Product, QA, DevOps, PMs, and stakeholders Identify technical risks and proactively propose mitigation strategies Mentor and support junior and mid-level engineers Support technical onboarding, vendor transition, and platform modernization initiatives Contribute to technical strategy, architecture evolution, and engineering best practices Required Qualifications 10+ years of software development experience (15+ years preferred for Principal-level candidates) Strong experience building and maintaining production-grade MERN stack applications Expert-level proficiency in: ReactJS Next.js TypeScript Node.js Express.js MongoDB Atlas & Mongoose ODM Hands-on experience with AWS cloud services and distributed systems Experience with CI/CD pipelines using Bitbucket Pipelines, GitHub Actions, GitLab CI, or similar Experience designing scalable cloud-based architectures and troubleshooting production issues Strong understanding of WCAG 2.1 AA accessibility implementation in React applications Experience working in Agile/Scrum development environments Proven ability to independently own major platform components and deliver on schedule Strong written and verbal communication skills
Preferred Qualifications
Experience working within EdTech, Healthcare, LMS, or training platform environments Familiarity with SCORM and xAPI standards Experience with vendor-transition or platform onboarding engagements Experience with AWS ECS/Fargate container deployments Familiarity with: AWS Cognito Lambda SQS DynamoDB AWS CDK SendGrid API Experience supporting multi-environment AWS deployments and environment parity remediation Prior technical leadership or mentoring experience strongly preferred Skills & Competencies Advanced full-stack debugging and problem-solving capability Strong software architecture and system design skills Ability to work effectively within legacy codebases and define modernization strategies Strong technical leadership and mentoring skills Excellent prioritization and time management Quality-focused engineering mindset Ability to communicate technical concepts clearly to both technical and non-technical stakeholders Ability to thrive in fast-paced, evolving project environments Core Technology Stack Frontend ReactJS Next.js TypeScript HTML5 / CSS3 WCAG 2.1 Accessibility Standards Backend Node.js Express.js RESTful APIs Database MongoDB Atlas Mongoose ODM AWS / Cloud ECS Fargate Lambda Cognito SQS DynamoDB AWS CDK Testing & DevOps Playwright Jest / Mocha Bitbucket Pipelines CI/CD workflows Containerized deployments Apply To This Job