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
Contact
Get in Touch
I'm open to new opportunities, collaborations, and interesting conversations.