Dan Borstelmann, Full-stack Developer in St. Louis, MO, United States
Dan Borstelmann

Full-stack Developer in St. Louis, MO, United States

Member since September 6, 2018
Daniel has worked in startups and enterprise companies doing full-stack web and mobile development for the last five years. He is passionate about quality software, valuable user experience, and team delivery of great products. As a freelancer, Daniel uses the best practices he has learned to help his clients achieve their goals.
Dan is now available for hire


  • Slalom
    JavaScript, Python, SQL, Postgres, React, React Native, Vue, Django, AWS...
  • TopOPPS
    JavaScript, Python, Postgres, Heroku, Backbone, Django, Salesforce, Cordova...



St. Louis, MO, United States



Preferred Environment

MacOS, Linux, Github, Atom, VSCode, Postico

The most amazing...

...project I've worked on was a CRM to help improve services for the homeless in St. Louis with the end goal of eliminating homelessness.


  • Software Engineer Consultant

    2017 - PRESENT
    • Built large-scale applications for numerous clients throughout the St. Louis area.
    • Worked with teams, internal and external, to deliver great products.
    • Worked in modern technology stacks to provide clients with the most up to date platforms.
    • Designed enterprise level systems and data architectures.
    • Helped train new generations of engineering talent in the St. Louis community.
    Technologies: JavaScript, Python, SQL, Postgres, React, React Native, Vue, Django, AWS, Heroku, Salesforce
  • Software Engineer

    2014 - 2017
    • Built clean UIs in the best technology available.
    • Built reusable application code to improve the efficiency of our engineering team.
    • Worked with other members on the team to build full-stack web and mobile applications.
    • Worked to integrate with other services, such as Salesforce, to increase the value of our product.
    • Developed full solutions across the whole stack and take ownership of delivering full features, from front-end to back-end.
    Technologies: JavaScript, Python, Postgres, Heroku, Backbone, Django, Salesforce, Cordova, Mobile/iOS


  • Underscore Templating for Atom (Development)

    I realized there was no syntax highlighter for Underscore templates in Atom, so I decided to build one! I developed it using Atom's easy extensibility process. Now developers using Underscore's templating system can more efficiently develop HTML files with data.


  • Languages

    HTML, CSS, SQL, Python, JavaScript, Objective-C, GraphQL, Swift, TypeScript, CoffeeScript, C++, Java
  • Frameworks

    Bootstrap, Django, Express.js
  • Libraries/APIs

    Backbone.js, Vue.js, React, Node.js
  • Paradigms

    REST, Modular Development, Agile
  • Platforms

    Mobile, Heroku, AWS EC2
  • Storage

    PostgreSQL, AWS S3
  • Other

    APIs, Full-stack, Front-end, Back-end, User Experience (UX), User Interface (UI), AWS Route 53
  • Tools

    Amazon CloudFront CDN


  • Bachelor of Science degree in Computer Science, Architecture
    2012 - 2016
    Washington University in St. Louis - St. Louis, Missouri

To view more profiles

Join Toptal
Share it with others