JEFFERY HEMPHILL
Fort Collins,CO
Summary
Accomplished software professional with extensive experience in dynamic start-up environments and major organizations such as NASA and the USAF. Proven expertise in leadership, full-stack development, data science, systems engineering, and physics. Adept at driving innovation and delivering high-impact solutions across diverse technical domains.
Overview
15
15
years of professional experience
1
1
Certification
Work History
Principal Software Engineer
- React Mobile
Seattle, WA
09.2022 - Current
- Lead development on our customer portal client application (ReactJS, Redux)
- Migrated system to use cursor pagination with searching, sorting, and filtering capabilities to reduce large data payloads and improved performance
- Architected full stack web-socket solutions for our large IOT network (~ 1 million devices)
- Developed business intelligence Python scripts for increased visibility and to promote data-driven decisions
- Interfaced and contributed to our high-concurrency API (Elixir)
- Matured the agile delivery process to increase productivity and reduce defects
- Worked in a small team to rebuild the core platform to drive the company from a maintenance and tech debt only environment to a healthy mix of new feature development and scalability
- Monitored and queried AWS Cloudwatch to find and diagnose errors
Co-Founder & Principal Software Engineer
- Pulse42.io
San Francisco, CA
08.2019 - 02.2022
- Managed an internationally distributed remote engineering team (up to 15 team members)
- Developed data models & big-data pipelines using Apache Kafka, Java, SQL & Python (Numpy, Pandas, TensorFlow)
- Conducted supervised learning for our data models on JIRA data with the Python deep-learning library Keras
- Managed database systems such as Postgres, MySQL, Neo4j, and MongoDB
- Designed & implemented client & server application architectures using Client: ReactJS, HTML, CSS; Server: NodeJS, ExpressJS, and Redis
- Provisioned Cloud resources & operations on Google Cloud Platform
- Planned & administered agile workflows using Jira, Confluence, Coda, Slack, and Zoom
- Participated in UX design by conducting user research, developing user personas, and creating mock-up wire-frames
Founder & Software Engineer
- Pear
Boulder, CO
01.2017 - 07.2017
- Pear was a 2-sided mobile application allowing people to host meals at their house
- Managed a team of 10 young professionals & students in developing a cross-platform prototype & marketing plan
- Built a Material UI design front-end with React-native, React-Navigation, & Redux
- Integrated Mongoose ORM for persisting and querying app models from a NodeJS server
- Deployed a RESTful api service on Heroku for HTTP consumption
- Created rapid prototyping system for iOS and Android using Expo's SDK
Physicist, Engineer Research Associate
- JILA
Boulder, CO
04.2017 - 06.2018
- Undergraduate experimental physicist apprentice to Nobel Laureate Eric Cornell
- Constructed optical system setups such as a Saturated Absorption Spectrometer for high precision spectroscopy for atomic physics
- Built a flood protection system for our experiments using an array of water flow sensing switches and an Arduino for processing
- Designed, Planned, & Micro-manufactured mechanical and electrical components used in our main experiment to measure the electron's electric dipole moment
- Performed statistical analysis on experimental data by creating linear & nonlinear fit models to experimental data
- Software tools used: Solidworks, Labview, Matlab, C, Python
Integrated Avionics Computer Systems Technician
- USAF
Abilene, TX
10.2009 - 10.2013
- Joined the USAF out of high school with a AFSC to work on avionic computer systems of B1-b aircraft
- Isolated and fixed complex issues in the B1-b's computing systems using logical diagrams and test equipment for the software and hardware
- Performed post-flight data analysis on time-series data from in-flight monitoring systems to determine faults
- Deployed 3 months to Qatar in support of Operation Enduring Freedom.
Mission Operations Intern, Systems Engineer Intern
- NASA Jet Propulsion Lab
Pasadena, CA
06.2016 - 09.2016
- Was selected for a rare position to work closely with scientists and engineers on future mission concepts such as Lunar Flashlight, Mars 2020, and SPHEREx
- Designed and debugged functional ground tests in C for Lunar Flashlight
- Coordinated high scale engineering efforts between departments across NASA and supporting contractors for Mars 2020 rover
- Worked as a systems engineer on a NASA astrophysics telescope mission concept SPHEREx which was selected for development costing $20M.
Education
Engineering Physics -
University of Colorado at Boulder
Boulder, CO12.2021
Business Minor -
University of Colorado at Boulder
Boulder, CO12.2021
Skills
- Leadership
- Interpersonal Communication Skills
- Quick Learner
- Adaptability
- Time Management
- System Architecture
- API Development
- Project Documentation
- Client interaction
- Software Development Lifecycle
Certification
AWS Cloud Practitioner, 08/22, 08/25
References
- Paul Camacho, Pulse42.io, Paul@pulse42.io, 925-970-255
- Vikrant Karvir, Pulse42.io, Pikrant@pulse42.io, 350-835-309
- Kyle Vaught, Boeing, Inc., Kylevaught1q@gmail.com, 305-831-292
- Nick Vinson, Pymetrics, Inc., nmvinson@gmail.com, 321-321-089
Hobbies and Interests
- Hiking
- Chess
- Guitar
- Travel
- Basketball
- Golf
- Philosophy
Timeline
Principal Software Engineer
- React Mobile
09.2022 - Current
Co-Founder & Principal Software Engineer
- Pulse42.io
08.2019 - 02.2022
Physicist, Engineer Research Associate
- JILA
04.2017 - 06.2018
Founder & Software Engineer
- Pear
01.2017 - 07.2017
Mission Operations Intern, Systems Engineer Intern
- NASA Jet Propulsion Lab
06.2016 - 09.2016
Integrated Avionics Computer Systems Technician
- USAF
10.2009 - 10.2013
AWS Cloud Practitioner, 08/22, 08/25
Engineering Physics -
University of Colorado at Boulder
Business Minor -
University of Colorado at Boulder
Similar Profiles
DIMITRA MAVRAGANIDIMITRA MAVRAGANI
Private English Language Tutor at -Private English Language Tutor at -
Diane GraceDiane Grace
Stay At Home Mum at -Stay At Home Mum at -
Tapiwa Gilbert BususuTapiwa Gilbert Bususu
Nursing Student at -Nursing Student at -