• Architected and engineered high-performance tools using Ruby, React, and Elm to support clinicians in filling hospital shifts, reducing manual operations workload.
• Led development of internal mobile projects using React Native and Expo, enabling on-the-go shift management for staff.
• Optimized clinician-facing tools using TypeScript and PostgreSQL, improving data load times and system reliability.
• Collaborated directly with Product and Operations to iterate on features based on user feedback and system performance metrics.

My goals are to champion build a great product, backed by a thoughtfully architectured codebase.

Work I've done here includes:

• Developed on-the-fly asset generation (using ImageMagick and AWS S3) for user-specific marketing materials.
• Integrated multi-currency financial support into the core transaction engine, enabling global expansion.
• Engineered a robust CI/CD deployment pipeline using GitHub Actions, reducing release time from hours to minutes.
• Acted as a generalist contributor across frontend (React), backend (Django), and internal tooling (Retool).

My stack here is: React, TypeScript, Django, PostgreSQL, Retool;

The highlight of my time at Zefr focuses on delivering a high quality sales tool within 6 weeks on a newly formed team.

Other work I did includes:

• Executed a complete rewrite of core internal libraries into TypeScript, improving developer velocity and reducing runtime type errors.
• Modernized CI/CD pipelines by migrating to GitLab CI, implementing automated testing stages that caught regressions earlier in the cycle.
• Maintained and updated legacy web services, ensuring backwards compatibility while slowly decoupling monolithic components.
• Successfully led the migration of test frameworks (from Mocha to Jest), resulting in 30% faster test execution.

My workflow stack here was: React, Typescript, Excel, Node JS;

When I originally joined Fair I was hired as a back-end engineer on the billing team. Over nearly two years, I grew into leading a team of engineers on the creation of an internal operations website. I took full ownership of this transition, embracing the opportunity to solve critical business problems during a company pivot.

• Impact & Ownership: Owned the Billing and Customer Fleet Management (CFM) systems, managing both legacy stability and new feature iterations.
• Team Leadership: Supervised a team of 3-5 international contractors, balancing technical guidance with project management to deliver on pivot-critical goals.
• Cost Efficiency: Identified and eliminated a redundant vendor contract, saving the company $80k/year.
• Operational Excellence: Created automations to decrease customer escalations, significantly reducing manual ticket volume for engineering and ops.
• Product Pivot: Re-architected the entire internal operations platform using GatsbyJS to support the new business model.
• Engineering Culture: Championed weekly engineering-only demos and served on the Team Bonding Committee.

Stack: Ruby, Python, React, SQL, GRPC;

While at Bird I worked in a mission team building, testing, and sunsetting billion dollar ideas in an extremely fast-paced environment.

• Our engineering team was lean: two iOS engineers, two Android engineers, and two full-stack engineers.
• We operated with high ownership, often transforming PM concepts into production-ready features for the next release cycle within hours.
• Sunsetting features was as important as building them; I experienced the full product lifecycle of rapid experimentation and iteration.

On this team, I focused on BirdPay (a QR payment platform) and the renters/owners program.

• Automated essential business data ingestion for BirdPay during lockdowns; I reverse-engineered city maps to script the upload of 127 businesses, bypassing manual ops work and providing immediate value to users.

Outside of my mission team, I drove cross-functional engineering goals:

• Led and facilitated full-stack guild meetings to share best practices.
• Partnered with Engineering leadership on "Quick Wins" Fridays, delivering cost-reduction and DevEx tickets in under 4 hours.
• Placed 3rd in an internal hackathon on my 5th day, demonstrating rapid onboarding and immediate contribution.

Stack: Kotlin, HTML, CSS, Javascript, SQL, Ruby, Python;

My time at Rinse taught me the beauty, and importance, of writing project specification documents. My teammates helped me feel confident in my strengths, and courageous in facing my weaknesses.

• Full-stack engineer working with Django, plain js, jQuery, React, Vue, CSS, and SCSS
• Product owner for updating, testing, and deploying an internal mobile application for iOS and Android through a hybrid framework used in daily operations by hundreds of users for a variety of purposes
• Worked in two-week sprint cycles continually pushing forward revenue impacting features and bug fixes
• Managed a variety of IT tasks including, but not limited to, setting up Mobile Device Management, flashing and repairing linux machines, and preparing for internal town halls
• Supported other teammates on external React Native application

Served as an event coordinator, or Co-Chair, for the inaugural MAGWest, a 3-day 24-hour grassroots Music and Gaming Festival. MAGWest is a volunteer-run event under MAGFest Inc., a 501(c)(3) non-profit organization.

• Brought together over 100 volunteers in the local communities, resulting in 1214 unique attendees at the first event
• Trained for the position through an internship involving cross-country traveling for office, warehouse, and event management work
• Event management work included being one of four event coordinators for MAGFest Laboratories, a three day 24-hour event at MAGFest's prior venue
• Office work included bug fixes and feature creation on the MAGFest Registration and Management System, as well as discussions on high-level MAGFest operational goals

"Dan thinks and acts strategically as if he was an owner of the company. He understands, supports, and exemplifies our organization's culture and values. He is effective at a huge and diverse quantity of tasks and knows when to reach out for help.", Dominic Cerquetti, Board Member, and Former Executive Director, of MAGFest Inc.

• Crafted python-based tools for managing song requests
• Cut and trimmed high quality audio from streams for fan and artist usage

An attempted 501(c)(6) for video gaming related events in the South Bay area.

• Coordinated and led weekly meetings to determine our purpose, and path to 501(c)(6) status
• Operated the game room at the first Silicon Valley Comic Con

• Transported and showcased up to five arcade cabinets at various events such as Subzero Art Faire, Maker Faire, and IndieArcade Sacramento
• Wrote an Arcade Launcher in Game Maker Studio accessing the file system outside of the sandbox limitations

• Provided positive customer service both in-person and over the phone including generating short-links to optimize over the phone solutions
• Supported Cisco Ticket Management Software, in-house TV service, and HP Printers

Due to a mishap with the registration system, and other on-site issues, I was placed in charge of Registration solo for the weekend. This was my first major volunteer experience, and marked the start of my running towards the world of MAGFest.

• Wrote a basic user manual for customers receiving in-house IT training
• Learned the basics of formality when working on a house call