Rocky Warren

An AWS Certified Solutions Architect with over ten years of experience shipping and maintaining tested, distributed, secure systems from thousand-line microservices moving billions of dollars each year to multi-million line GPS guidance systems. I deliver customer value utilizing object-oriented, functional, statically-typed, dynamic, and database languages and lead teams as a Founding Principal Engineer, Tech Lead, Architect, Product Manager, and Startup Co-founder.


  • JavaScript
  • TypeScript
  • Elixir
  • Scala
  • C#
  • Python
  • Shell/Bash
  • Java
  • Rust
  • PostgreSQL
  • SQS
  • DynamoDB
  • Kafka
  • AWS Lambda
  • Athena
  • Akka
  • Redis
  • gRPC
  • React
  • GraphQL
  • Phoenix
  • Docker
  • REST API Design
  • Distributed Systems
  • Continuous Delivery
  • Software Architecture
  • Test-Driven Development


  • CEO describing a Fortune 100 company's reaction to a demo I created: "Slam dunk with [Company]! Thank you for all your efforts on this! [Company VP] was visibly and vocally excited. I think his voice cracked a little when he exclaimed, 'how did you do that!'."
  • VP of Product: "If no one is telling you, it's appreciated how intentional you are with growing our collective knowledge and being a champion for training. Thanks for doing this stuff, Rocky. I've also been hearing great things about your contributions and speed-of-delivery. The leadership team is impressed."
  • VP of Engineering: "Rocky is one of our most respected and valuable engineers. His contributions are critical to the success of the company."
  • Technical Lead and Manager: "He's a one-man wrecking crew, one of the most productive engineers I've worked with."



Founding Principal Engineer

Feb 2022 - Present
  • Building a company from the ground up.

Vertex Software

Principal Technical Lead and Product Manager, APIs & SDKs

Aug 2020 - Feb 2022
  • Manage and mentor developers. Team has strong focus on customer satisfaction and ease of on-boarding with regular customer interviews, step-by-step guides, interactive demos, a command-line interface (CLI), and automated, always up-to-date API code samples.
  • Perform product discovery and regularly prioritize to ensure team quickly delivers the right products at the right time. Furthered this by implementing "No Meeting Wednesday" and asynchronous stand-ups to increase focus time.
  • Created uptime and availability tests with automatic rollback and alerting, confidently enabling continuous delivery of services.

Principal Software Architect

Sep 2019 - Aug 2020
  • Hired as Principal Engineer responsible for leading public REST APIs. Built from the ground up to OpenAPI, JSON:API, and CloudEvents specifications. Inter-service communication via Kafka and gRPC. Code coverage >90%.
  • Created and own a platform of core libraries and build plugins to reduce duplication, improve security, and multiply engineering team's productivity.
  • Architect and implement distributed, streaming, event-driven systems capable of sub-second bill of materials (BOM) and scene updates on CAD models with hundreds of thousands of BOM lines.


Principal Software Engineer

San Francisco, CA
Jun 2016 - Sep 2019
  • Transitioned most business-critical database table from mutable to immutable, enabling point-in-time user balance queries, robust statements, and snapshots. Snapshots resulted in query speeds up to 200x faster and a 75% reduction in overall database deadlocks.
  • Migrated webhooks to serverless Lambda functions and scaled to millions of messages a day while reducing peak delays from hours to minutes and cutting costs by 50%. Launched with zero downtime (and greater than zero fist pumps).

Lead Developer

San Francisco, CA
Jul 2014 - Jun 2016
  • Led development of API responsible for moving billions of dollars per year while decreasing partner "time to first API call" from hours to minutes with step-by-step guides and SDKs.
  • Led Instant Bank Verification, cutting account verification times from three days to a few seconds via 3rd party integration. Built as containerized, auto-scaling microservice.

Senior Software Engineer

Des Moines, IA
Jul 2012 - Jul 2014
  • Led company's foray into microservices with Dwolla Credit, integrating a credit provider to inject millions in buying power into the network. Mitigated partner downtime with caching and fault-tolerant background processes.
  • Won internal hackathons by reducing ACH clearing times and allowing account creation via API. Each influenced what are now best-selling products.

Crucible Commodities


San Francisco, CA
Jul 2014 - Dec 2016
  • Built commodities trading platform from the ground up complete with reactive, real-time market, PDF contract generation, and e-signing.
  • Secured with encryption in transit and at rest, A+ Qualys TLS score, and OWASP Top 10 mitigations.

John Deere

Technical Lead

Des Moines, IA
Jan 2010 - Jul 2012
  • Led CommandCenter project development, an in-cab self-driving GPS guidance display. Now factory installed in all large-scale John Deere vehicles worldwide. Two million+ lines of code, released on schedule, with all known defects closed.
  • Led fortnightly meeting of 25 tech leads across all guidance displays comprising over 150 developers.

Software Engineer

Des Moines, IA
Jan 2008 - Jan 2010
  • Led coding Katas of multiple 50+ developer groups teaching keyboard shortcuts, refactorings, test-driven development, pair-programming, and Linux shell commands.
  • Organized company's first Hackathons. After votes from 200+ employees, won both with customer analytics, predictive keyboard, touch screen gestures, and Tetris! Demoed results to CEO and staff.

Software Engineer Intern

Des Moines, IA
May 2006 - Jan 2008

    University of Iowa

    Software Developer

    Iowa City, IA
    Aug 2006 - Dec 2007
    • Created psychology studies and GUIs in DirectX and GDI+.


    University of Iowa

    Bachelor of Science, Computer Software Engineering

    Iowa City, IA
    Aug 2003 - Dec 2007
    • Minors in Computer Science and Business

    Talks and Publications

    3D Digital Twin Example Applications
    Open-source examples to get started building interactive 3D applications; no 3D experience required.
    Sending Millions of Serverless Webhooks
    Talk at the dsmJS Meetup describing my serverless webhooks architecture.
    Lessons Learned From Sending Millions of Serverless Webhooks
    Blog published on describing faster, lower cost webhooks using my serverless architecture.