09/14/2026 updated

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Senior Full Stack Engineer | JavaScript, TypeScript, React, Node.js

Atlanta, USA
Only remote
Bachelor of Science (B.S.) in Computer Science, Texas Wesleyan University
Atlanta, USA
Only remote
Bachelor of Science (B.S.) in Computer Science, Texas Wesleyan University

Profile attachments

Jan_Mitchell.pdf

Full Stack Web Development
Over 12 years of experience building end-to-end web applications using JavaScript, TypeScript, React, and Node.js, covering everything from initial prototype to production rollout.

Distributed Systems & Real-Time APIs
Design and implementation of distributed services using Kafka, Redis, WebSockets, and event-driven architectures, enabling real-time data processing and low-latency reads at scale.

Cloud & DevOps
Hands-on experience with AWS (Lambda, ECS, S3, CloudFront, API Gateway), GCP, Docker, Terraform, GitHub Actions, and Datadog for deploying and monitoring production systems.

Frontend Engineering
Proficiency in React, Next.js, Redux, React Query, Tailwind CSS, Webpack, Vite, and Chrome Extensions (Manifest V3), with a focus on performance optimization and user experience.

Backend Development
Strong background in Node.js, Express, NestJS, FastAPI, GraphQL, REST, WebSockets, and Server-Sent Events for building scalable and maintainable backend services.

Database & Data Management
Experience with PostgreSQL, MongoDB, DynamoDB, Redis, and SQL, including writing optimized queries, stored procedures, and designing schemas for high-traffic applications.

ML Integration & Tooling
Integration of ML-driven features using OpenAI/Anthropic APIs, LangChain, vector databases (Pinecone, pgvector), model evaluation pipelines, and A/B testing into consumer-facing products.

Programming Languages
Fluency in JavaScript, TypeScript, HTML5, CSS3/SCSS, Python, Go, and SQL for a wide range of frontend, backend, and scripting tasks.

CI/CD & Observability
Setup and maintenance of CI/CD pipelines on platforms such as Heroku, AWS, and GitHub Actions, combined with observability tooling including Datadog for monitoring production systems.

Experience

Professional experience10+ years
Freelancer since2013

Languages

EnglishNative speaker

Project history

Senior Software Engineer

A4D Inc
Led development of an internal Chrome extension (Manifest V3) surfacing AI-assisted suggestions in ad creative tools. Designed a real-time suggestion API backed by WebSockets and LLM streaming. Built end-to-end features across React dashboards, Node.js services, and PostgreSQL. Architected an event-driven pipeline on Kafka and AWS Lambda processing ~12M ad events daily. Integrated OpenAI and fine-tuned models into product workflows. Drove migration from a legacy REST monolith to a GraphQL gateway, reducing page payload by ~35%. Mentored 4 engineers.

Software Engineer

Dell Technologies
Built and maintained React and Node.js applications for Dell's customer support portals. Designed distributed services using Kafka and Redis. Shipped a real-time chat and co-browse feature using WebSockets and Redis pub/sub adopted by ~1,800 agents. Refactored authentication flows using short-lived JWTs. Improved frontend performance, raising Lighthouse score from 58 to 91. Authored API design guidelines and onboarding documentation.

Software Developer

MojoTech
Delivered web products for early-stage startups on a small consultancy team. Built React/Redux frontends and Node.js/Express APIs for a fintech client. Helped a healthtech client ship their first production release in under 4 months. Set up CI/CD pipelines and observability on Heroku and AWS. Contributed to MojoTech's internal React component library reused across at least 5 client projects.

Software Developer

BNSF Railway
Developed internal logistics and scheduling tools for dispatchers across BNSF's rail network, balancing legacy .NET services with modern JavaScript frontends. Built reusable UI components in JavaScript/jQuery. Wrote stored procedures and optimized SQL queries against large operational datasets. Maintained integrations with mainframe systems and participated in on-call rotation supporting 24/7 operational systems.

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