Lijun Wang

Co-Founder

San Jose, California, United States9 yrs 7 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

7+ years in software engineering and architecture.
Designed systems for $5B+ annual payment volume.
Co-founded an AI tool startup enhancing productivity.

Stackforce AI infers this person is a Fintech and AI-focused Full-Stack Developer with extensive experience in distributed systems.

Contact

Skills

Core Skills

Full-stack DevelopmentArchitectureMicroservicesDistributed SystemsRestful ApisJava

Other Skills

Software Development Life Cycle (SDLC)AIBackend ArchitectureBusiness StrategyDockerReact.jsGitNode.jsHTML5Amazon Web Services (AWS)Redux.jsExpress.jsMySQLJestCascading Style Sheets (CSS)

About

Senior Software Engineer with 7+ years of experience designing, building, and scaling distributed systems and microservices. Delivered secure, event-driven APIs and cloud-native services that powered $5B+ annual payment volume (Plastiq Inc.) and global e-commerce supply chains (Gap Inc.) https://github.com/Lijun21

Experience

9 yrs 7 mos

Total Experience

2 yrs

Average Tenure

3 yrs

Current Experience

Moomooco

Co Founder

Jun 2023 – Present · 3 yrs · San Francisco Bay Area · Remote

Created and monetized a unified AI tool combining ChatGPT, Gemini, and LLMs with seamless model switching. Built full-stack, deployed, and onboarded paying users. (delighthop.com)
Prototyped a marketplace for remote workers to find shared workspaces. Explored business strategy and backend architecture while testing with early adopters. (moomooco.com, discontinued)
Strengthened product and systems thinking through full-cycle development, customer validation, and rapid experimentation, deepened understanding of how technical decisions drive real business value.

Software Development Life Cycle (SDLC)ArchitectureFull-Stack Development

Plastiq

3 roles

Senior Software Engineer

Promoted

May 2022 – Apr 2023 · 11 mos

Contributed to the architecture design and development of distributed backend
services powering $5B+ in annual transaction volume.
Built and optimized Node.js microservices and RESTful APIs from the ground up,
forming the backbone of Plastiq payment platform.
Partnered with product managers and stakeholders to define scopes, prioritize
features, and deliver release on schedule.
Mentored junior engineers through code reviews, technical guidance, and fostering a
culture of continuous learning.

DockerReact.jsGitNode.jsHTML5Amazon Web Services (AWS)+21

Software Engineer

Promoted

Mar 2021 – May 2022 · 1 yr 2 mos

TDDSoftware Design Patterns

Associate Software Engineer

Nov 2019 – Mar 2021 · 1 yr 4 mos

Gap

Software Engineer

Oct 2018 – Nov 2019 · 1 yr 1 mo · San Francisco Bay Area

Contributed to the development of RESTful APIs that integrated inventory, ERP, and
supply-chain systems, improving allocation accuracy across 2,000+ stores.
Implemented authentication and authorization(OAuth2, JWT) for multi internal
services, enhance system security and access control.
Collaborated with product and analytics teams to build analytical dashboards that
provided actionable insights for business decisions.
Skills: Spring Boot, Java, Rabbit MQ, React, Angular
unit test, integration test, End to end test, and ISO test for microservices

Drishticon

Software Engineer

Jul 2018 – Nov 2019 · 1 yr 4 mos · San Francisco Bay Area

Enterprise level design, develop and depoyment.
React Hook, Webpack, Babel, Npm, Spring Boot, Java, Spring, Spring Cloud, Jenkins, PCF, SQL, MariaDB, MongoDB, Python, Flask
OAuth2, Single Sign On, Authentication and Authorization

Epixeiro.com

Software Engineer

Jul 2018 – Oct 2018 · 3 mos · San Francisco Bay Area

Worked for an early age startup target for education innovation. Built Login in with Linkedln, log in with Facebook features, also webpage content scraping for target student profile.

Filemaker inc., an apple subsidiary

Intern

Mar 2017 – Jul 2017 · 4 mos · San Francisco Bay Area

Relationsional Database Design for different small businesses. Integration with Filemaker Cloud Server, API.

42

Software Developer at 42

Sep 2016 – Aug 2018 · 1 yr 11 mos · Fremont, CA

Front-End: HTML5, CSS3, Flexbox, Javascript browser side, Bootstrap, React, Redux, Materialize.
Back-End: REST API, OAuth, JWT, Session/Cookie, Webhook, Node.js, Express, MongoDB, Mongoose, Passport, elesticSearch. C, C++, Unix/Linux/OSX, Shell, Shell Scripting, Git, Computer Network, Docker.
Tools: SSH, Github, Stripe, Sendgrid, Digital Ocean, Heroku, AWS, npm, brew, Postman, Visual studio code, GCC compiler, LLDB debugger, Valgrind, VIM.
https://github.com/Lijun21