Yusuf S.

🔘 Saved a business $5-10k/year on a client website’s cloud costs within weeks of joining. 🔘 Interviewed and screened candidates for a software engineering role. 🔘 Designed a state-of-art E2EE MLS-based chat system that supports 200,000 member groups, with Zero-Knowledge Auth (OPAQUE) and hardware-backed AES-256 security for local data, including multi-device support, backup systems, and E2EE notification delivery (FCM). 🔘 Designed a state-of-art E2EE file sharing service (cloud drive) using OpenPGP. 🔘 Implemented an encrypted notifications system that makes data opaque to Google/Apple with smart features such as custom aggregation, controlled notification pacing, etc. similar to Facebook notifications. 🔘 Implemented an AI chatbot for language learning part of a chat system (self-hosted LLM). 🔘 Implemented containerized microservices using Nest.js, GraphQL, EdgeDB, PostgreSQL, Google Cloud (+ Firebase), Docker, gRPC. 🔘 Developed 3 mobile applications with TypeScript, React Native, GraphQL/Relay, Figma. 🔘 Developed 2 web applications with Next.js, Remix.js, Tailwind, Relay, Cloudflare, and other tech. 🔘 Developed 3 C++ and Rust JSI React Native Modules (OPAQUE, MLS, SQLite/file storage). 🔘 Built a service rental video calling service (with Twilio) with an in-app wallet. 🔘 Built a Nest.js back-end for Calendar-related Chrome Extension w/ billing using Lemon Squeezy 🔘 Built CI/CD pipelines to build Docker containers and C++ libraries using GitHub Actions. 🔘 Developed Objective-C/C++ and Swift code for iOS-specific features in a React Native app. 🔘 Implemented durable execution pipelines using Temporal for relevant workloads. 🔘 Deployed applications to Google Play and AppStore, including handling legal & compliance parts 🔘 Implemented high-performance text processor to process 17 GiB of JSONL in RAM. 🔘 Forked and improved several libraries including React Native itself and GraphQL libraries.

🔘 Established company’s internal coding standards and best practices for a team of 5+ engineers, and influenced the company’s engineering direction. 🔘 Re-containerized Canvas LMS with Docker, and implemented a company-internal hypervisor to make deploying a new Canvas LMS instance the matter of a few clicks. 🔘 Developed 3 back-end software using Python, Redis, PostgreSQL 🔘 Developed 3 web applications using Remix.js, Tailwind, Relay, Cloudflare 🔘 Developed infrastructure on AWS with technologies including S3, CodePipeline, SQS/SNS, Load Balancers, AMIs, VPCs, which are designed and deployed with CloudFormation (IaC) 🔘 Written design documents for big and small systems/features on Google Docs, supplemented with charts made using Figma and/or Figjam, and held design reviews with the team.