Jake CastilloJake Castillo

SoftwareEngineer.

Computer software/hardware design & innovation specialist.

A strong foundation in engineering principles across platforms and technologies, with a focus on back-end and cloud development/architecture (AWS) — and a drive to give back to the community.

  • AWS Solutions Architect
  • B.S. Computer Engineering · UH Manoa
  • Honolulu, HI
Email meGitHub
jake — -zsh
$ whoami Jake Castillo $ cat fun-fact.txt Uma Musume is one of my favorite games $ ls skills/ TypeScript React Node.js AWS Next.js PostgreSQL NestJS Vue Prisma

02 / approach

ENGINEER THE
SYSTEMS WE RELY ON.

Computer software/hardware design and innovation specialist with a drive to give back to the community and a strong foundation in engineering principles across multiple platforms and technologies. Experienced in back-end development, testing, and debugging code with a focus on cloud development/architecture (AWS).

How I Build

Build Where the Risk Lives.

  1. 01

    Find the Constraints

    I separate the real constraints from the assumptions everyone's stopped questioning, and pressure-test the outcome before any code exists. I'd rather kill a weak idea in a week than build the wrong thing fluently.

  2. 02

    Bet Where It Counts

    I pour design into the few decisions that are expensive to reverse and stay deliberately boring everywhere else — proven tools for the plumbing, so the real risk and invention land where they create value.

  3. 03

    Prove the Unknown

    I build the scariest piece first — the unproven integration, the AI behavior, the assumption it all rests on — and put it in real hands while it's still cheap to be wrong.

  4. 04

    Build to Be Changed

    Security, observability, and an honest record of why each call was made are part of the design, not a cleanup pass — I build for whoever inherits it a year from now, not for how clever it looks today.

Experience

01 / 04 ROLES

  1. Oct 2025–Present · 01 / 04

    DevSecOps Software Engineer

    @ Pacific ImpactZone

    My current role — bringing security into cloud-native delivery.

    • Lead DevSecOps initiatives, embedding automated dependency, secret, and code scanning into CI/CD so issues surface before they reach production.
    • Bring security and reliability practices into the delivery pipeline while keeping release cadence fast.
    VIEW COMPANY
  2. Jan 2021–Oct 2025 · 02 / 04

    Software Engineer

    @ DataHouse

    Hawaiʻi software & IT consultancy — I shipped and modernized systems for government, healthcare, and enterprise clients.

    • Backend developer and technical architect on the multi-phase RCUH financial-system modernization — migrating a legacy AS400 + AngularJS platform to React, NestJS/Prisma, and AWS Lambda, and integrating an SAP COTS system.
    • Full-stack developer on the CAL-ACCESS Replacement System for the California Secretary of State — the public's window into the state's campaign-finance and lobbying disclosures.
    • Tech lead across healthcare builds — owning 3rd-party EMR integration for Carespan and delivering the Astiva insurance app in a one-month sprint, guiding onshore developers and managing releases.
    • Built and supported Hawaiʻi Department of Education applications (Vue / Express) and led DevOps and M&O for RCUH's legacy financial system as onshore tech lead and SME.
    • Shipped COVID-19 response software — AlohaClear testing (React/Angular + PostgreSQL on AWS) and TalofaPass thermal-camera systems in American Samoa.
    VIEW COMPANY
  3. Jul 2020–Aug 2020 · 03 / 04

    Summer Intern

    @ DataHouse

    Pandemic-response engineering between school terms.

    • Partnered with NEC Corporation to install and maintain thermal-scanning systems across State of Hawaiʻi airports for COVID-19 mitigation.
    • Ran regression testing for the LumiSight mobile and web apps and supported operations and location-mapping planning.
    VIEW COMPANY
  4. Jan 2020–May 2020 · 04 / 04

    CIMP Intern

    @ DataHouse

    Community Innovation & Mentorship Program — my first engineering role.

    • Built a queuing and check-in workflow for the State of Hawaiʻi Animal Quarantine Holding Facility with CIMP mentors and interns — leading front-end development.
    • Planned and installed the system's hardware components.
    VIEW COMPANY

04 / stack

THE
STACK

LANGUAGES

TypeScriptJavaScriptPythonGoC#RustC / C++SQL

FRAMEWORKS

ReactNext.jsNestJS.NETExpressFastAPITailwind CSSshadcn/uiVueAngularThree.js

CLOUD & DEVOPS

AWSTerraformDockerKubernetesGitHub ActionsHelmServerlessAzureVercel

SECURITY

DevSecOpsCloud SecurityPolicy-as-CodeIaC SecuritySAST / Secret ScanningSupply-Chain SecurityGRC / CMMC

AI / ML

Multi-agent SystemsLLM IntegrationAnthropic / ClaudeOpenAIVercel AI SDKPydanticNVIDIA Nemotron

DATA

PostgreSQLRedisPrismaSupabaseDrizzleMySQL

PRACTICES

IaCCI/CDObservabilityVitestPlaywrightk6Agile / Scrum

ROLES

DevSecOps EngineerSolutions EngineerTechnical ArchitectTech LeadFull-stack DeveloperDevOps EngineerBackend Developer

CERTIFICATIONS

AWS Certified Cloud Practitioner

Amazon Web Services

AWS Certified Solutions Architect – Associate

Amazon Web Services

Available for new work

Let’s build
something good.

I design and ship software solutions — modernizing the systems teams rely on, end to end. Open to engineering, cloud, and platform work, and I read every message. Reach out below.

Email mejakecast@hawaii.edu
  • AWS SOLUTIONS ARCHITECT
  • AWS CLOUD PRACTITIONER
  • DEVSECOPS
  • HONOLULU, HI