Jason C.

Full-Stack Developer | MERN | AWS | AI Integration

Full-stack engineer with over 5 years of experience working on real-world production systems used daily by non-technical teams. My strength is stepping into existing React / Node.js (TypeScript) / MongoDB applications running on AWS and improving their stability, performance, and operational safety — without large rewrites or unnecessary risk. I work comfortably across frontend, backend, database, and infrastructure, with a strong focus on ownership and reliability. 𝗠𝘆 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 • 𝗠𝗘𝗥𝗡 𝗦𝘁𝗮𝗰𝗸: MongoDB, Express.js, React, Node.js for robust, scalable web applications • 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴: React, Redux, Tailwind CSS for responsive and intuitive UIs • 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 & 𝗔𝗣𝗜𝘀: REST, GraphQL, microservices, WebSockets, real-time event-driven systems • 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: OpenAI, Claude, GML, Suno, VEO, custom ML models for intelligent features • 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 & 𝗖𝗹𝗼𝘂𝗱: PostgreSQL, MongoDB, AWS, Docker, Kubernetes, CI/CD for reliable deployments 𝗧𝘆𝗽𝗶𝗰𝗮𝗹 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 • End-to-end 𝗠𝗩𝗣 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 from idea to production launch • 𝗖𝗹𝗼𝘂𝗱 𝗺𝗶𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 from monoliths to scalable microservices on AWS, Alibaba, Tencent • Adding 𝗔𝗜 𝗳𝗲𝗮𝘁𝘂𝗿𝗲𝘀 such as chat assistants, semantic search, and document Q&A • Building secure 𝗺𝘂𝗹𝘁𝗶-𝘁𝗲𝗻𝗮𝗻𝘁 𝗦𝗔𝗔𝗦 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 with billing, authentication, and role-based access • 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝘁𝘂𝗻𝗶𝗻𝗴 𝗮𝗻𝗱 𝗰𝗼𝘀𝘁 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 for existing systems 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 I apply world-class engineering practices to client projects. I deliver 𝗰𝗹𝗲𝗮𝗿 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻, 𝗿𝗲𝗮𝗹𝗶𝘀𝘁𝗶𝗰 𝘁𝗶𝗺𝗲𝗹𝗶𝗻𝗲𝘀, 𝗮𝗻𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗿𝗲𝘀𝘂𝗹𝘁𝘀 that scale with your business. 𝗖𝗮𝗹𝗹 𝗧𝗼 𝗔𝗰𝘁𝗶𝗼𝗻 If you need a proven Full-Stack Developer who can architect, build, and scale with confidence, invite me to your job or hire me today to get started. SEO keywords for Upwork search Senior Full-Stack Developer, MERN Developer, React Developer, Next.js Developer, Node.js Developer, Express.js, TypeScript, Developer, FastAPI, REST API, GraphQL, WebSockets, Microservices, Event-Driven, PostgreSQL, MongoDB, Redis, AWS Developer, Lambda, API Gateway, ECS, EKS, CloudFront, S3, RDS, Cognito, SQS, SNS, Step Functions, CloudWatch, GCP Developer, Cloud Run, GKE, Cloud Functions, Pub/Sub, Firestore, BigQuery, DevOps, Docker, Kubernetes, Terraform, Helm, CI/CD, GitHub Actions, GitLab CI, Argo CD, AI Full-Stack, LLM, RAG, Vector Database, Pinecone, Weaviate, FAISS, Milvus, Vertex AI, SageMaker, Hugging Face, OpenAI, Google Gemini, LangChain, LlamaIndex, OAuth2, JWT, SSO, RBAC, OWASP, Unit Testing, Integration Testing, E2E Testing, Playwright, Cypress, Sentry, Datadog, Prometheus, Grafana, Stripe, Twilio, Firebase, Auth0, Clerk, PWA, SSR, SSG, Monorepo, Turborepo.