Ervin Khamoido

Software Engineer at Oddity Tech, building Methodiq with React, Next.js, TypeScript, GraphQL, Apollo, Node.js, Express, PostgreSQL, and AWS. Designed scalable e-commerce features across product discovery, quizzes, cart, accounts, subscriptions, and returns. Built the return portal from scratch, improved subscription management, modernized legacy architecture, reduced recurring production errors via Datadog, supported weekly releases, reviewed PRs, and mentored frontend engineers.

Developing mission-critical features for a unified international payment system. Architected cross-platform user identity and onboarding flows, built secure APIs with NestJS, TypeScript, and PostgreSQL, and developed React/Next.js admin tools. Integrated RabbitMQ and Kafka, improved CI/CD and code quality, collaborated with Compliance and Product teams, and mentored junior engineers.

Architected an AI-powered conversational health platform using Next.js, NestJS, PostgreSQL, OpenAI, and Anthropic. Integrated multiple LLM providers with model switching, conversation persistence, usage tracking, feedback, and analytics. Built real-time streaming responses, prompt and conversation flows, secure authentication, session history, and privacy-conscious data handling. Collaborated with psychologists and product stakeholders to improve AI quality and usability.

Led end-to-end development of web and mobile features for a decentralized social platform. Built a real-time messenger with WebSockets, Redis, and PostgreSQL, and helped architect a React Native mobile app. Created a Telegram mini-game from scratch that scaled to 800,000+ monthly active users. Integrated Web3 wallets and smart contracts, improved backend performance by 40%+, established CI/CD pipelines, and mentored junior engineers.

Developed a professional networking and scientific publishing platform for doctors, researchers, and healthcare professionals. Built backend services and APIs for user management, article publishing and validation workflows, notifications, search, feeds, dashboards, authentication, and role-based access control. Developed reusable frontend architecture and integrated external services while contributing to privacy, authorization, and complex content-management workflows.