Hello, I'm
Efosa Oyegun
Senior Software Engineer & Engineering Manager
16+ years of building the future
Westminster, California
Explore My WorkAbout Me
Software Engineering Leader with 16+ years of experience building and scaling web applications, APIs, and cloud infrastructure. Proven track record leading engineering teams (up to 6 engineers), architecting SaaS platforms, and delivering high-impact products at companies ranging from seed-stage startups to enterprise. Deep expertise in TypeScript, React, Node.js, and AWS, with hands-on experience in AI-assisted development, microservices, and mobile applications.
Tech Stack
Languages
Frontend
Backend
Databases
Cloud & DevOps
AI & Tools
Experience
Kard Financial
Senior Software Engineer
Jan 2022 – Jun 2025
Remote
SaaS loyalty platform, card-linked offers for financial institutions
- ▸Led AWS automation, architected SSO with Cognito, integrated DataBricks/Tableau analytics
- ▸Built React/Redux/TypeScript portal features, mentored junior engineers
Impact Creative Systems
Engineering Manager
Jun 2020 – Jan 2022
Los Angeles
Entertainment marketplace startup connecting writers with industry buyers
- ▸Grew engineering team from 2 to 6 engineers
- ▸Architected platform from the ground up
Dave.com
Lead Engineer, Contract
May 2019 – Dec 2019
Los Angeles
Challenger bank — budgeting & overdraft protection
- ▸Led 3-engineer team, launched multi-million dollar banking service
- ▸Moleculer microservices, CircleCI, Kubernetes, GCP
Honey
Lead Engineer
Mar 2017 – Mar 2019
Los Angeles
Browser extension & e-commerce — found/applied coupons automatically
- ▸Led team building internal ad platforms, launched offers feed
- ▸React Chrome extension used by millions, React Native mobile prototype
Vixlet
Senior Software Engineer
Oct 2015 – Mar 2017
Los Angeles
Social networking platform for brands
- ▸Isomorphic JS with Express/React, shared styling system
The Irvine Company
Senior Developer Analyst
Oct 2011 – Oct 2015
Irvine
Major California real estate company
- ▸Re-architected C# application to 3-tier architecture
- ▸Node.js monitoring, mobile optimization
Experian Interactive
Senior Software Engineer
Sep 2010 – Sep 2011
Irvine
Credit Bureau front-end engineering
- ▸HTML5/CSS3 modernization initiatives
Earlier Career
Software Engineer
2005 – 2010
Various
Exsilio Solutions (Microsoft consultant) & DotPrinter (e-commerce B2B)
Education
Drexel University
BSc Business Administration
MIS & Marketing Concentration
1994 – 1999 · Philadelphia, PA
Get In Touch
Interested in working together? Let's connect.