Daniel Fadehan

I build reliable systems that scale (and feel good). Distributed systems, APIs, databases, and cloud infrastructure.

You can find me on X, GitHub, and LinkedIn.

I'm a software engineer with over two years of experience building reliable systems and APIs. I specialize in engineering efficient solutions for complex user and system requirements.

I began my journey into software engineering during my first programming bootcamp and fell in love with building systems. Since then, I've worked alongside talented engineers in hackathons (btw I've won in 8), early-stage startups, and open-source projects.

My approach combines technical excellence with a clear understanding of business needs. The best solutions solve the immediate problem while leaving room for future growth. When I'm not coding, you can find me exploring new technologies, playing the piano, or gaming.

Languages JavaScript · TypeScript · Python
Frameworks Node.js · Express · React.js · NestJS · Flask
Databases PostgreSQL · MongoDB · Redis · MySQL · Algolia
Cloud Railway · Azure · Render · Docker · CI/CD

EXPERIENCE

  • Architected the primary backend service for a multi-tenant platform powering 2 SaaS products, delivering 10 modules across auth, analytics, affiliate marketing, and business operations, backed by 100+ end-to-end tests.
  • Designed and implemented a versioned Redis caching architecture for the Google Places API, eliminating duplicate place lookups across businesses and reducing third-party API spend by 50% through intelligent cache reuse.
  • Identified and neutralized a CI/CD supply-chain attack, removing a malicious credential-exfiltration workflow before execution and preventing compromise of production infrastructure secrets.
AuralinkTribe MintTourism
Node.jsNestJSTypeScriptPostgreSQLTypeORMRedisJestSupertestDockerGitHub ActionsSwagger/OpenAPIGoogle Places APICloudinary
  • Developed and integrated 60+ modular React components across 6 major HR systems (Helpdesk, Exit Management, Assets, Knowledge Base, etc.), improving UI scalability and maintainability by 40%.
  • Designed and implemented a Role-Based Access Control (RBAC) system with dynamic permission matrices and dual API integration, enhancing administrative flexibility across legacy and new endpoints.
  • Engineered Exit Management and Offboarding modules with multi-level approval flows, dynamic checklists, and automated clearance tracking, reducing HR manual processing by 30%.
ReactjsTypescriptJavascriptDjangoJestZustandTanstact React Query
  • Optimized server-side operations, reducing API response times by 20% and improving overall platform scalability.
  • Implemented new core features and enhancements, including custom routes for course management, content delivery, and chat functionality, to meet evolving team requirements.
  • Led efforts in data management and storage solutions, integrating Redis for caching, improving file handling performance, and ensuring reliable large-scale operations.
  • Worked with cloud storage providers like Azure Blob and services like Cloudinary for managing media assets, ensuring efficient file uploads and retrievals.
  • Contributed to core repository functionalities such as course file parsing, Redis-based caching, and AI-driven content generation for lectures and courses.
  • Authored efficient code for generating course resources using AI services for descriptions, categories, and images, automating critical backend processes.
  • Managed error handling through centralized middleware, improving system stability and security.
TypescriptNodejsExpressjsPrismaORMPostgresQLMicrosoft AzureMongo DBAlgoliaGeminiCloudinary

Open to freelance work, collaborations, and interesting problems. Reach out and let's talk.

JavaScriptTypeScriptPythonNode.jsExpressReact.jsNestJSFlaskPostgreSQLMongoDBRedisMySQLAlgoliaRailwayAzureRenderDockerCI/CDJavaScriptTypeScriptPythonNode.jsExpressReact.jsNestJSFlaskPostgreSQLMongoDBRedisMySQLAlgoliaRailwayAzureRenderDockerCI/CD
CI/CDDockerRenderAzureRailwayAlgoliaMySQLRedisMongoDBPostgreSQLFlaskNestJSReact.jsExpressNode.jsPythonTypeScriptJavaScriptCI/CDDockerRenderAzureRailwayAlgoliaMySQLRedisMongoDBPostgreSQLFlaskNestJSReact.jsExpressNode.jsPythonTypeScriptJavaScript