Hello, I'm
Zachary Hueras
Senior Software Engineer
15+ years designing and scaling high-availability cloud platforms, real-time distributed systems, and full-stack applications.
About Me
Building systems that scale
I'm a senior software engineer with over 15 years of experience building systems that scale. My career has taken me through ad tech, telemedicine, and cloud infrastructure — always with a focus on performance, reliability, and clean architecture.
I've led migrations from on-premise software to multi-tenant SaaS platforms, built real-time bidding systems handling 120,000+ requests per second, and spent nearly a decade making telemedicine more accessible through careful, thoughtful engineering.
When I'm not in the codebase, I'm exploring ideas at the edges — like bringing Erlang's concurrency model to JavaScript with otp-js, or making form generation from JSON Schema painless with forml.
15+
Years of Experience
120K+
Requests/sec Scaled
99.9997%
Uptime Achieved
7x
CI/CD Throughput Gain
Resume
Experience
Principal Software Engineer
UniDoc Managed Services
April 2025 — Present
Remote
- Sole engineer to transition during UniDoc's acquisition of AMD Global Telemedicine; retained institutional knowledge and ensured product continuity.
- Expanded automated test coverage by 1,000+ test cases, resolved 20+ defects, and reduced customer-reported connection issues by ~90%.
- Designed internal reporting tools giving new ownership deeper visibility into platform usage.
- Onboarded and mentored 3 engineers through ~12 training sessions on platform architecture.
Principal Software Engineer
AMD Global Telemedicine
March 2016 — March 2025
Hybrid | Chelmsford, MA
- Architected migration of an on-premise telemedicine product to a multi-tenant SaaS platform with 99.9997% uptime.
- Reduced CI/CD build times by 95% (8 hours → 25 minutes) through parallelization and caching.
- Built a multi-tenant SSO platform supporting OpenID Connect, OAuth2, AzureAD/EntraID, and LDAP.
- Integrated with 12+ EMRs via HL7v2, FHIR, and proprietary APIs.
- Transformed SDLC from waterfall to Agile; increased release cadence from 1/quarter to 7+/quarter.
Principal Software Engineer
Chitika / Cidewalk
March 2014 — February 2016
On-Site | Westborough, MA
- Built a Real-Time Bidding service in Erlang/OTP from scratch — later spun off as Cidewalk.
- Scaled to 120,000+ requests/second, evaluating hundreds of campaigns per request in under 50ms.
- Engineered an auto-scaling system that reduced infrastructure costs by thousands per month.
- Achieved 99.99% uptime via Erlang hot-code-swap for zero-downtime rolling deployments.
Software Engineer
Chitika
June 2011 — March 2014
On-Site | Westborough, MA
- Led rewrite of core ad-serving components from Perl to Node.js.
- Rebuilt monitoring and alerting tooling with historical context, reducing false alarms by 90%.
- Built performance and observability tooling used across the engineering org.
Sales Engineer
Chitika
April 2010 — June 2011
On-Site | Westborough, MA
- Developed custom ad variants for managed clients matching brand colors, layouts, and fonts.
- Built an auto-expanding/contracting ad iframe that adapted dynamically to available inventory.
- Improved click-through rates and revenue by up to 30% through systematic A/B testing.
Skills
Languages
Frameworks & Libraries
Databases & Caching
Cloud & Infrastructure
CI/CD & DevOps
Architecture & Design
Education
Self-Taught Software Engineer
Self-directed learning in CS, software engineering, and distributed systems. 15+ years of hands-on production experience across ad tech, telemedicine, and cloud infrastructure.
Assabet Valley Regional Technical High School
Certificate of Proficiency in Computers and Information Systems, 2005
Portfolio
Personal Projects
otp-js
★ 27
Erlang/OTP's concurrency model for JavaScript
An implementation of Erlang's Open Telecom Platform (OTP) in JavaScript. Brings Erlang-style concurrency primitives — supervisor trees, gen_server, and message passing — to Node.js using ES6 Promises as processes and Symbols as atoms.
forml
★ 7
JSON Schema-driven React form generation
An extensible React form generator driven by JSON Schema definitions. Supports rapid prototyping and production use, with fully customizable decorator components and built-in localization via react-i18next.
Contact
Get in Touch
I'm open to new opportunities, collaborations, and interesting conversations.