Senior Full Stack Engineer (MERN, AWS)

NOSH ERWAN

Senior Full Stack Engineer

******************@*****.*** github.com/mylibrari Virginia, United States PROFESSIONAL SUMMARY

Results-oriented, team-first Senior Full Stack Engineer with 8+ years building web apps and APIs across fintech, SaaS, health, and e-commerce. Builds across the MERN stack; Node.js, Express, Nest.js on the server and React, Next.js, TypeScript on the client side, with real depth in REST and GraphQL design, MongoDB and PostgreSQL data work, and AWS delivery. Reduces page load times, raises uptime, and brings AI tooling into daily development to move features out faster. Reviews code, guides junior engineers, and partners closely with product and design to keep releases on track with clear communication.

TECHNICAL SKILLS

Backend Development Node.js, Express.js, Nest.js, TypeScript, JavaScript (ES6+), Socket.io, BullMQ, Kafka, RabbitMQ, microservices Frontend Development React.js, Next.js, Redux Toolkit, React Query, Vue.js, Angular, Webpack, Vite, code-splitting, lazy loading APIs & Integrations REST, GraphQL (Apollo), OpenAPI / Swagger, gRPC, Stripe, Plaid, Twilio, OAuth2, JWT, Postman Databases &

Clouds

. MongoDB, PostgreSQL, MySQL, Redis, ElasticSearch, DynamoDB

. AWS (Lambda, ECS, RDS, S3), GCP, Firebase

AI & Automation OpenAI API, LangChain.js, Vercel AI SDK, TensorFlow.js, Hugging Face Inference, n8n, Prompt Engineering DevOps & Infrastructure Docker, Kubernetes, Terraform, GitHub Actions, Jenkins, GitLab CI, Nginx, Prometheus, Grafana, Sentry Testing & QA Jest, Mocha, Supertest, Cypress, Playwright, React Testing Library, TDD, BDD, contract testing Version Control & Collaboration Git, GitHub, GitLab, Agile (Scrum, Kanban), Jira, Trello, Asana, ClickUp, Confluence, Slack PROFESSIONAL EXPERIENCE

Senior Full Stack Engineer Construction LS. LLC 12/2022 – Present

• Developed event-driven Node.js and Nest.js services over Kafka, raising throughput on real-time data flows by 45%.

• Rebuilt analytics dashboards in React, Next.js, and TypeScript, raising customer retention by roughly 20%.

• Tuned MongoDB aggregations and Redis caching to keep API responses under 120ms for 400K+ monthly users.

• Integrated the OpenAI API with LangChain.js to auto-summarize reports, saving the team about 150 hours a quarter.

• Migrated workloads to AWS ECS and Lambda with Terraform, trimming cloud cost and cutting recovery time by 30%.

• Improved observability using Prometheus, Grafana, and Sentry, lowering incident resolution time by 25%.

• Established Jest and Cypress suites inside GitHub Actions, reducing regressions reaching production by 35%.

• Mentored 4 engineers through pull-request reviews and pairing, raising delivery speed and code consistency. Full Stack Engineer TEKSystems 05/2020 – 11/2022

• Engineered Express.js middleware and shared TypeScript libraries that unified data exchange across microservices.

• Optimized React and Angular components with memoization and lazy loading, cutting page load times by 30%.

• Modeled PostgreSQL and MongoDB schemas with indexing, keeping multi-million-row queries fast and consistent.

• Added a TensorFlow.js recommendation widget to the React app, increasing user click-through by about 18%.

• Deployed services to AWS via Jenkins and GitLab CI pipelines, doubling release frequency without added risk.

• Validated payment and identity flows with Jest and Supertest, lowering post-release defects by nearly 40%.

• Partnered with analysts and UI/UX designers in Agile sprints to align features with the customer journey. Software Engineer Upwork 07/2018 – 04/2020

• Built Node.js and Express REST services with MongoDB and PostgreSQL, handling 60K+ daily transactions securely.

• Created reusable React components for client modules, ensuring smooth API integration and a consistent UI.

• Indexed and tuned slow SQL queries with optimized joins, reducing average response times by about 15%.

• Prototyped a Node.js chatbot on the Dialogflow API, automating routine support replies for common requests.

• Configured AWS CloudWatch dashboards and structured logs, giving the team clear visibility into bottlenecks.

• Verified core flows with Jest and Cypress suites, lifting overall test coverage from 55% to roughly 80%.

• Coordinated with frontend peers to integrate Stripe and Twilio, expanding payment and messaging features. KEY PROJECTS

ONTAB

https://ontab.com/

Fintech money-transfer and payments platform with built-in identity verification. Payment and verification APIs built in Node.js, Express, and React, on MongoDB and Redis with AWS. CareCentrix

https://carecentrix.com/

Health-at-home care-coordination platform that flags readmission risk. Real-time provider dashboards built in Nest.js and React with GraphQL, on PostgreSQL and Redis on AWS. Petstablished

https://petstablished.com/

Shelter and rescue management SaaS for adoptions, fosters, and medical records. Node.js and React app with automated pet-listing exports and Stripe payments, on MongoDB with AWS. EDUCATION

B. Sc. – Computer Science

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