27.10.2026 aktualisiert
100 % verfügbar
Senior MERN Stack Developer | React Native | LLM Integration | Generative AI
Bamberg, Deutschland
Nur Remote
Master's Degree in Software Systems ScienceÜber mich
Senior MERN Stack Developer and LLM Integration Engineer with 5+ years of experience. Delivered 20+ web apps, dashboards, and mobile apps using React, Node.js, TypeScript, AWS, and LangChain. Improved workflow efficiency by 35% and reduced manual document search by 40%.
Skills
OpenAIAsp.NetJavaPHPAndroid Application DevelopmentIpad AppDjangoPythonShopifyWooCommerceKotlinAngularJS
MERN Stack Development
Expertise in building full-stack web applications using MongoDB, Express.js, React, and Node.js. Delivery of 20+ web apps and dashboards with measurable improvements in performance and efficiency.
LLM Integration & Generative AI
Proficiency in integrating large language models using LangChain, FAISS, Pinecone, and Hugging Face. Implementation of AI document-answering solutions that reduced manual search time by 40%.
Cloud & DevOps (AWS)
Hands-on experience with AWS services including EC2, S3, Lambda, and API Gateway. Automated deployment pipelines reducing release effort by 80%, alongside Docker, Kubernetes, and CI/CD workflows.
React Native Mobile Development
Development of cross-platform mobile applications with React Native, including offline sync, push notifications, and deep linking for large user bases.
TypeScript & JavaScript
Strong command of TypeScript and JavaScript for building scalable, maintainable frontend and backend codebases across multiple production projects.
Database Management (PostgreSQL, MongoDB, MySQL)
Design and optimization of relational and NoSQL database schemas and indexes, achieving significant reductions in slow queries and improved data consistency.
GraphQL & REST API Design
Architecture of GraphQL endpoints replacing inefficient REST calls, cutting data over-fetching by 30% and improving response speeds across distributed systems.
Testing (Jest, Cypress, TDD)
Implementation of automated test suites using Jest and Cypress across critical application flows, applying TDD principles to minimize regression issues and rollback frequency.
NestJS & Microservices
Building of backend microservices with NestJS and Express.js to aggregate telemetry and operational data, increasing system visibility and scalability.
Next.js & Frontend Frameworks
Development of server-side rendered and static web applications using Next.js, Redux, Tailwind CSS, HTML, and CSS for performant and responsive user interfaces.
Expertise in building full-stack web applications using MongoDB, Express.js, React, and Node.js. Delivery of 20+ web apps and dashboards with measurable improvements in performance and efficiency.
LLM Integration & Generative AI
Proficiency in integrating large language models using LangChain, FAISS, Pinecone, and Hugging Face. Implementation of AI document-answering solutions that reduced manual search time by 40%.
Cloud & DevOps (AWS)
Hands-on experience with AWS services including EC2, S3, Lambda, and API Gateway. Automated deployment pipelines reducing release effort by 80%, alongside Docker, Kubernetes, and CI/CD workflows.
React Native Mobile Development
Development of cross-platform mobile applications with React Native, including offline sync, push notifications, and deep linking for large user bases.
TypeScript & JavaScript
Strong command of TypeScript and JavaScript for building scalable, maintainable frontend and backend codebases across multiple production projects.
Database Management (PostgreSQL, MongoDB, MySQL)
Design and optimization of relational and NoSQL database schemas and indexes, achieving significant reductions in slow queries and improved data consistency.
GraphQL & REST API Design
Architecture of GraphQL endpoints replacing inefficient REST calls, cutting data over-fetching by 30% and improving response speeds across distributed systems.
Testing (Jest, Cypress, TDD)
Implementation of automated test suites using Jest and Cypress across critical application flows, applying TDD principles to minimize regression issues and rollback frequency.
NestJS & Microservices
Building of backend microservices with NestJS and Express.js to aggregate telemetry and operational data, increasing system visibility and scalability.
Next.js & Frontend Frameworks
Development of server-side rendered and static web applications using Next.js, Redux, Tailwind CSS, HTML, and CSS for performant and responsive user interfaces.
Erfahrung
Berufserfahrung5 - 10 Jahre
Freelancer seit2018
Sprachen
DeutschgutEnglischverhandlungssicher
Projekthistorie
Developed healthcare interfaces with React, React Native, TypeScript, and NestJS, accelerating delivery by 20%. Integrated FHIR and MedPlum APIs, boosting health data consistency by 25%. Deployed Jest and Cypress test suites across 8+ critical flows, slashing regression issues by 30%. Reduced repeated defects by 18% through code reviews and edge case testing.
Created auth, reporting, and inventory features with TypeScript, Node.js, and PostgreSQL, raising automation efficiency by 30%. Restructured API data flows between frontend and backend, cutting API issues by 25%. Optimized PostgreSQL schemas and indexes, decreasing slow queries by 20%. Introduced Jest and TDD into CI/CD, minimizing rollback frequency by 20%. Led root cause analysis and error monitoring, eliminating 18% of recurring production issues.
Engineered a MERN operations panel (MongoDB, Express.js, React, Node.js) managing real-time data for 500+ IoT smart fridges across Europe, reducing dashboard load time by 40%. Architected GraphQL endpoints replacing inefficient REST calls, cutting data over-fetching by 30% and improving fleet operator response speed by 25%. Instrumented Express.js microservices to aggregate telemetry data from 500+ devices, increasing operational visibility by 25%. Collaborated with IoT engineers to debug device-server synchronization issues, lowering data discrepancy incidents by 22%.