Leslie Heinzen
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Hey there! 👋 I’m Leslie, a versatile full-stack software developer dedicated to building applications and services of all shapes and sizes. Whether working independently or as part of a team, I love working on new things, and helping people solve difficult problems.
Experience
Senior Software Developer
A personal budgeting platform for the web, Android, and iOS.
Owner, Developer
- Create, build and host websites, apps, and services for clients.
- Develop tailor-made software solutions to meet the specific needs of businesses.
- Integrate projects with third-party APIs, including payment systems, social media, and video streaming.
Software Engineer
An iOS-focused multicamera livestreaming platform.
- Built a greenfield WebRTC videoconferencing web application.
- Re-wrote the web dashboard for customer management of billing, media files, and app settings.
- Managed third-party integrations with major social media platforms for livestreaming, post creation, and realtime comments.
- Overhauled Stripe customer billing integration, including support for Google Pay and Apple Pay.
- Provided professional and technical guidance to junior developers.
Software Engineer
A restaurant technology company creating kitchen display systems and table management solutions.
- Developed and maintained core microservices in support of other product teams, including authentication and product licensing.
- Worked on external API integrations with large partner companies.
- Researched and introduced new technologies to the company tech stack, including Vue.js and GraphQL.
- Maintained internal administrative and customer-facing enterprise web applications, and UI libraries used by other teams.
- Implemented new features in internal and customer-facing web applications.
Skills
- JavaScript
- TypeScript
- React
- React Native
- Vue.js
- Knockout.js
- Ember.js
- HTML
- CSS
- SCSS
- C#
- .NET
- Ruby on Rails
- Node.js
- Express.js
- MongoDB
- SQL
- NoSQL
- MySQL
- PostgreSQL
- Redis
- Docker
- Swagger / OpenAPI
- AWS Lambda Functions
- SQS/SNS
- Azure Functions
- Azure Containers
- EventGrid
- Storage
- GitHub Actions / Workflows
- Heroku
CLI Summary for YNAB
Get an overview of your YNAB budget information straight from the command line. Allows the user to inspect their monthly budget by category, accounts information, and reports.
Knockout CLI
Trivia Box
A multiplayer real-time trivia system. I initially envisioned it as a way to be paired with simple IoT devices (like rpis) running the server, so that trivia gamerunners could bring the devices with them to a location and run game servers on-the-go, allowing any client on the same network to play. The idea is to eventually expand to a cloud-backed service to support over-the-internet play.
Volunteering
Mentor
Provide instruction and mentoring to student cohorts for front-end web development and React courses. Give presentations and lectures on various CS and Software Development topics. Provide one-on-one guidance and student project evaluation.
Mentor
Provided professional guidance and interview preparation to aspiring software engineers.