Dan Isaza, APIs Developer in Chicago, United States
Dan Isaza

APIs Developer in Chicago, United States

Member since September 3, 2020
Dan is a full-stack product engineer and engineering leader. He's also a former startup founder. Dan has led remote engineering teams and thrives in high-ownership environments. He's driven by impact and likes to discuss business-level problems to develop a strong understanding of the business domain before implementing technical solutions. He believes that shipping iteratively is a strong predictor of project success and is comfortable with advanced data science topics.
Dan is now available for hire


  • Clever Real Estate
    Amazon Web Services (AWS), Project Leadership, Technical Leadership...
  • Orbital Insight
    Google Sheets API, Google Sheets, GeoJSON, Google Maps API, Geocoding
  • Emburse
    OAuth 2, Heroku, Django REST Framework, Django ORM, Django, ECMAScript (ES6)...



Chicago, United States



Preferred Environment

Amazon Web Services (AWS), AWS, SQLite, SQL, PostgreSQL, Django, React, JavaScript, Python 3, Python, Docker Compose, Docker, Unix

The most amazing...

...thing I've ever done was architect and implement the back-end system for matching customers to real estate agents at Clever Real Estate.


  • VP Engineering

    2018 - PRESENT
    Clever Real Estate
    • Architected and developed the back-end system that introduces all customers to real estate agents. This drastically reduced the amount of time needed to work with each customer and more than tripled our sales capacity.
    • Hired, onboarded, and managed the engineering team. Owned the engineering roadmap and worked with product stakeholders to plan the work that the team would do.
    • Rebuilt the company's legacy WordPress website in Gatsby. This drastically sped up the site. Traffic to the site grew 5x in the year after the transition.
    Technologies: Amazon Web Services (AWS), Project Leadership, Technical Leadership, Team Leadership, Leadership, Task Management, Task Automation, Task Scheduling, Celery, SMS Bots, SMS, Bandwidth APIs, Workday, Twilio API, Twilio, Jinja, HTML5, HTML, CSS, CSS3, Tailwind CSS, PostGIS, HubSpot, Mapbox, Google Geocoding API, Google Maps API (GeoJSON), Google API, Docker Compose, Docker, Scope Management, People Management, Web Project Management, Project Management, Test Automation, Automation, APIs, Zapier, JavaScript, React, Gatsby, Amazon CloudFront CDN, AWS, Amazon EC2 (Amazon Elastic Compute Cloud), SQL, PostgreSQL, Django ORM, Django, Python 3, Python
  • Product (Freelance)

    2018 - 2018
    Orbital Insight
    • Developed and documented a process for collecting/geocoding locations of interest involved in the global construction supply chain. Many other freelancers then used this process to build out a dataset that the company used to build a new offering.
    • Communicated regularly with both technical and non-technical stakeholders.
    • Provided weekly updates on progress, including descriptions of challenges that the team of data-collectors may face when implementing the data collection process.
    Technologies: Google Sheets API, Google Sheets, GeoJSON, Google Maps API, Geocoding
  • Full-stack Engineer (Freelance)

    2018 - 2018
    • Refactored the permissions system for making and approving financial transactions.
    • Wrote extensive automated tests to protect against future bugs.
    • Overhauled the front-end user experience for managing permissions, with a focus on simplicity and ease of use.
    Technologies: OAuth 2, Heroku, Django REST Framework, Django ORM, Django, ECMAScript (ES6), React, JavaScript
  • Product Engineer

    2016 - 2018
    • Updated the company's payments infrastructure, saving them over $100,000 per year in transaction fees. This also streamlined the payments process and drastically reduced the time required to pay freelancers. (Integrated with the Payoneer API).
    • Unblocked over $10 million in sales pipeline as the interim security point-of-contact. This involved describing the company's security posture to prospective customers and proposing the technology team's security roadmap.
    • Heavily contributed to the internal platform that was used to manage the company's active projects with over 600 freelancers.
    Technologies: Amazon Web Services (AWS), Payment Security, Payment APIs, Online Payments, OAuth 2, Express.js, React Redux Form, React Redux, Redux, Angular, Heroku, Amazon EC2 (Amazon Elastic Compute Cloud), AWS, mLab, Mongoose, Docker Compose, Docker, MongoDB, Node.js, ECMAScript (ES6), JavaScript
  • Product (Internship)

    2015 - 2015
    • Ran multivariate tests on an email list of millions of small business owners to reduce churn in the customer base of one of the US's largest financial services firms.
    • This included designing and executing experiments.
    • Wrote Python scripts and SQL queries to analyze customer churn data from millions of small businesses across the country. The goal was to understand campaign performance in reducing churn.
    • Performed cohort analysis for merchants going through email marketing campaigns.
    Technologies: Experimental Design, Cohort Analysis, Analytics, Analysis, Product Strategy, Product Analytics, A/B Testing, Multivariate Statistical Modeling, Multivariate Testing, Email Marketing, Drip Email, Email, Scripting, SQL, Python 3, Java
  • Co-Founder: Fulfillment/Campaign Management

    2013 - 2014
    • Directly managed campaigns for our largest advertising clients.
    • Led the four-person campaign management team that was in charge of ensuring smooth client outcomes for all projects.
    • Developed statistical models to predict our future capacity and inform our sales process.
    • Developed statistical models for predicting clicks on influencer endorsements, boosting our margins.
    • Conducted over 200 hours of user interviews and participated in sales.
    Technologies: R, Scikit-learn, NumPy, Pandas, Microsoft Excel, Google Sheets, Python 3


  • Mechanical Pen Plotter Utilities for Enthusiasts

    This is a JavaScript-based set of utilities for creating generative art and plotting it on a mechanical pen plotter called an AxiDraw v3.

    The code allows users to generate SVG files that will be drawn on the machine.

    I wrote a line-deduplication algorithm that decreased plotting times by 96%. Drawings that previously took over four hours to print now take only 10 minutes.


  • Languages

    JavaScript, Python, Python 3, CSS3, CSS, HTML, HTML5, Python 2, CoffeeScript, TypeScript, SQL, ECMAScript (ES6), Java, R
  • Frameworks

    Django, Django REST Framework, Tailwind CSS, Jinja, Express.js, Angular, AngularJS, OAuth 2, Redux
  • Libraries/APIs

    Twilio API, Django ORM, React, Node.js, React Redux, React Redux Form, Google Maps API, Google Sheets API, Google API, Google Maps API (GeoJSON), Google Geocoding API, Pandas, NumPy, Scikit-learn
  • Tools

    Celery, HubSpot COS, Microsoft Excel, FullStory, Sentry, NGINX, Flow, Git, GitHub, Amazon CloudFront CDN, Zapier, Docker Compose, Mongoose, Geocoding, Google Sheets
  • Paradigms

    Testing, Unit Testing, Test-driven Development (TDD), ETL, Data Science, Automation, Test Automation
  • Platforms

    Twilio, Unix, New Relic, Amazon EC2 (Amazon Elastic Compute Cloud), Heroku, Docker, Mapbox, Amazon Web Services (AWS)
  • Other

    Task Scheduling, Task Automation, Task Management, Leadership, Project Leadership, Scripting, Analysis, Code Review, Source Code Review, API Documentation, Documentation, Full-stack, Workday, Bandwidth APIs, SMS, SMS Bots, Team Leadership, Technical Leadership, Email, Email Marketing, A/B Testing, Product Strategy, Analytics, Streaming Data, Containers, Containerization, Computer Science, Mathematics, Statistics, Computational Statistics, AWS, APIs, Gatsby, Web Project Management, People Management, Scope Management, Online Payments, Payment APIs, Payment Security, GeoJSON, HubSpot, Drip Email, Multivariate Testing, Multivariate Statistical Modeling, Product Analytics, Cohort Analysis, Experimental Design
  • Storage

    PostGIS, PostgreSQL, Amazon S3 (AWS S3), MongoDB, mLab, SQLite
  • Industry Expertise

    Project Management


  • Bachelor of Science Degree in Math and Computer Science
    2012 - 2016
    Stanford University - Palo Alto, CA

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