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.

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