# Zachary Zeleznick > Senior Software Engineer, Growth at Semgrep Location: Los Angeles, California, United States Profile: https://flows.cv/zacharyzeleznick Experienced software engineer specializing in automation, infrastructure, and tools. Demonstrated history of delivering quality software and improving developer efficiency. Strong engineering professional with simultaneous degrees in Bioengineering (B.S.) and Computer Science (B.A.) from UC Berkeley. Note: I do not accept connection requests from strangers. Please remind me how we know each other, or why you're interested in making the connection. ## Work Experience ### Senior Software Engineer II (L5) @ Semgrep Jan 2023 – Present Drove user acquisition (+X% YoY) and activation (+55% YoY) through product-led onboarding as the leader of the Growth Engineering team. Instrumented core user flows, experiments, and product outcomes to improve product and engineering quality while simultaneously improving data completeness across the go-to-market functions through improved system design, telemetry capture, and backend engineering. Identified and influenced over $1.5M in new quarterly ARR with product qualified lead to sales conversions. ### CTO, Co-Founder @ Stealth Startup Jan 2023 – Jan 2023 Built an app for students and professionals to get the most from their documents through AI-empowered text-to-speech, translations, and question-answering. Secured 3 pilot programs with LAUSD schools and interviewed with YC, but was unable to realize meaningful revenue. Frontend (NextJS + React) Backend (NodeJS + Express + AWS EC2 + AWS Lambda) AI (GPT-3 + Langchain + Pinecone) Logging & Analytics (Sentry, Segment, Logtail, Plausible) ### Software Engineer III @ Snap Inc. Jan 2019 – Jan 2022 | Greater Los Angeles Area Took on greater responsibilities within the Product Strategy team in a new hybrid role. Lead cross-functional initiatives that combine product analytics, software engineering, and statistical techniques to help drive customer insights for Spectacles. Through driving our organization’s in-app instrumentation, data pipelines, and experimental analyses, improve understanding of user behavior and disseminate insights and recommendations to drive meaningful change. Reduced user-cancellations (-5% absolute, -23% relative) and perceived wait time (-8 sec, p50) for one of our core user flows, identified 1M+ conversion-likely customers, and improved our purchase conversion rate by 50% with more representative reporting. ### Software Engineer II @ Snap Inc. Jan 2017 – Jan 2019 | Greater Los Angeles Area Increased my scope of work within the Labs Automation team to own the continuous-integration flow, end-to-end testing infrastructure, firmware + client integration test reliability, and factory apps. Developed and managed third-party integrations including Github, CircleCI, JIRA, GCS, Stackdriver, ElasticSearch, Sendgrid, and Artifactory during the software development lifecycle. Reduced developer wait time from 60 minutes to 25 minutes (p50) on each PR through designing an improved pipeline with faster firmware builds and optimized job scheduling across our worker fleet. Worked across all stacks to identify and solve problems. ### Software Engineer @ Snap Inc. Jan 2017 – Jan 2017 | Venice, CA Returned to the Labs Team to continue my work on developer efficiency and software quality. Built a remote-operable, optical test station to collect a comprehensive dataset of Snapcode images and ground-truths for our Snapscan accuracy investigation. Analyzed failures and improved Snapcode detection and decoding algorithms by 50% using computer-vision techniques and fine-parameter tuning. Wrote and maintained core testing infrastructure and software libraries for firmware and client teams. ### Engineering Fellow @ TAVtech Jan 2016 – Jan 2017 | Tel Aviv Area, Israel - Machine Learning & Computer Vision survey course, covering TensorFlow, Keras, NLP, and Deep Learning. Taught by Gil Levi, PhD in Deep Learning at Tel Aviv University - Cybersecurity and Cloud Computing (AWS, Hadoop, SQL) bootcamps. Taught by Redis Labs' Senior Big Data Architect and GE Security Researcher ### Software Engineering Intern @ Snapchat, Inc. Jan 2016 – Jan 2016 | Venice, CA Interned in the Labs Team, focusing on improving developer efficiency and software quality through test automation, reporting, and tools. Developed an end-to-end service for developers to view test results and firmware logs, collect key metrics, and generate reports. Used nodejs + react for the web app, firebase as the database, and python + bash to drive the system. ### Co-Founder @ Catalyst@Berkeley Jan 2014 – Jan 2016 - Launched a student-run healthtech incubator - Formed an advisory board working with UC Berkeley, UCSF, Stanford, CITRIS - Created strategic partnerships with UCSF, CITRIS, Cooley LLP, and StartXMed ### Student Entrepreneur-In-Residence @ SkyDeck | Berkeley Jan 2013 – Jan 2016 - Represented student-entrepreneurs at public functions as the sole SEIR at SkyDeck - Managed new content for the SkyDeck website ### Campus Director @ Hult Prize Foundation Jan 2014 – Jan 2015 | UC Berkeley - Organized the quarter-finals for the $1M Hult Prize at UC Berkeley ### Growth Intern @ VuMedi Jan 2015 – Jan 2015 | Oakland, CA - Ran various experiments with Facebook ad campaigns and content treatments - Developed retargeting and audience segmentation strategies to drive customer conversions and engagement ### Student Fellow @ European Innovation Academy Jan 2014 – Jan 2014 | Nice Area, France European Innovation Academy is the world’s largest startup accelerator with an entrepreneurship network spanning 75 countries and 4,000+ alumni. - Built a social networking app for professionals - Placed in the top 10 out of 65 teams from across the world. ### Undergraduate Researcher @ UC Berkeley Jan 2013 – Jan 2014 | Liepmann Lab - Drafted microfluidic devices using SolidWorks - Investigated the effectiveness of 3-D printing microfluidic chips ### Innovation and Advanced Technology Intern @ Kaiser Permanente Jan 2013 – Jan 2013 | Oakland, CA - Evaluated startups and emerging technologies against current KP portfolio - Profiled and analyzed market trends - Worked with R&D and clinicians to design an emergency protocol mobile app ### Tutor @ IvyMax Inc Jan 2012 – Jan 2012 | Irvine, CA - Led ACT, TOEFL, and SAT II private lessons - Taught math and algebra to mixed age groups ### Research Assistant @ UC Irvine Jan 2011 – Jan 2011 | UCI MIND - Studied the behavioral and neurological effects of amyloid beta plaques and tau tangles through a transgenic mouse model - Analyzed data from experimental drug-therapy trials that targeted the disruption of the amyloid cascade in mice ## Education ### Bachelor of Arts (B.A.) in Computer Science University of California, Berkeley Jan 2014 – Jan 2016 ### Bachelor of Science (B.S.) in Bioengineering and Biomedical Engineering UC Berkeley College of Engineering Jan 2012 – Jan 2016 ## Contact & Social - LinkedIn: https://linkedin.com/in/zzeleznick --- Source: https://flows.cv/zacharyzeleznick JSON Resume: https://flows.cv/zacharyzeleznick/resume.json Last updated: 2026-03-22