# Justin Wang > Software Engineer Location: San Jose, California, United States Profile: https://flows.cv/justinwang1 Software Engineer with a background in mechanical engineering and a curiosity to learn new web technologies to help better the world we live in. Experienced and passionate in developing full-stack applications and tools that simplify day-to-day challenges and connect people. ## Work Experience ### Software Engineer @ ServiceTitan Jan 2024 – Present ### Software Engineer - Notifications @ Nextdoor Jan 2022 – Jan 2023 | San Francisco, California, United States High-impact team driving sessions on platform. Designed systems serving 100M+ notifications per day. Led project to build new web notifications system with new APIs, redesigned infrastructure, and React onboarding flow while working with PMs and data scientists to lead A/B testing and analysis, driving up web and mobile web user engagement ### Software Engineer @ Dealpath Jan 2020 – Jan 2022 | San Francisco, California, United States Developed customer facing features such as integrating TOTP two-factor authentication login flow with Google Authenticator to increase security as well as built Webhook system with React management dashboard and APIs to allow real-time synchronization between Dealpath and customer apps ### Software Engineering Immersive Resident @ Hack Reactor Jan 2019 – Jan 2020 | San Francisco Bay Area • Mentor 60+ students on Javascript fundamentals and system design • Provide technical expertise on React, Redux, Node.js and other web technologies • Support alumni and students by conducting mock interviews and whiteboard sessions • Interview program applicants and evaluate technical abilities and communication skills ### Frontend Engineer, Cave Inn @ Personal Projects Jan 2019 – Jan 2019 • Developed a single-page service in React to re-render components on state changes to provide a clean user experience • Designed service-oriented architecture via an Express proxy server to server multiple microservices • Containerized microservice with Docker for scalability and deployed images into AWS EC2 instances • Optimized page load speed from 3.3s to 0.4s through text-file compression and minifying webpack bundles • Followed test-driven development practices with Jest and Enzyme to ensure >80% code coverage ### Full Stack Engineer, ReSeePe @ Personal Projects Jan 2019 – Jan 2019 • Designed full-stack app with RESTful APIs and React re-rendering logic within a 72-hour deadline • Modularized front-end components using React to create reusable content and PostgreSQL to ensure data persistence • Implemented password authentication via Bcrypt to ensure user security ### Backend Engineer, DataFULLY @ Personal Projects Jan 2019 – Jan 2019 • Increase throughput by 20x to achieve 1300 rps through database optimization and Redis LRU caching exit strategy • Designed relational schema in Postgres for 20M+ rows to decrease read time from 400ms to less than 1ms • Identified system bottlenecks utilizing stress-testing tools such as Loader.io and New Relic • Horizontally scaled app with Nginx load balancer and Postgres replication to remove bottlenecks and increase reliability ### Mechanical Engineer & Project Manager @ Kevin Sullivan Heating & Air Jan 2018 – Jan 2019 | Martinez, CA • Designed HVAC systems for commercial buildings priced up to $4.4 million through equipment selection based on performance and energy analysis to meet scope of work and engineering codes • Maximized savings by 15% through comparative analyses of vendors based on equipment specifications and pricing • Analyzed projected costs of 15+ incoming projects to determine optimal prices to bid and budget • Managed up to 5+ projects simultaneously by working cross-functionally with foremen and project owners ### Research Assistant @ Pines Laboratory Jan 2016 – Jan 2017 • Consulted with multidisciplinary team to develop new devices used in nanodiamond medical imaging by conducting tests, analyzing data, and documenting results to characterize and optimize performance of devices • Streamlined tests and interfaced hardware with automation MATLAB script to increase efficiency of validation testing • Manufactured and assembled test fixtures and devices utilizing 3D modeling software and fabrication tools • Supervised group of four undergraduates in running experiments and enforced laser and magnet safety lab protocols ## Education ### Bachelor of Science (B.S.) in Mechanical Engineering University of California, Berkeley ### Minor in Electrical Engineering & Computer Science University of California, Berkeley ### Hack Reactor ## Contact & Social - LinkedIn: https://linkedin.com/in/justnwang --- Source: https://flows.cv/justinwang1 JSON Resume: https://flows.cv/justinwang1/resume.json Last updated: 2026-03-29