Web Specialist · Independent Contractor

I build, secure and maintain the web systems your business runs on

20+ years shipping for the web. I work as an independent contractor for US clients in fintech, marketing and health: custom development, QA/QC, AI-assisted delivery pipelines and security review. Cofounder of Krei.dev, SwapIt.dev and MiExpediente.app.

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  • 20+ years of experience
  • US clients, remote
  • Fintech · Marketing · Health
  • 70+ vulnerabilities published
Who I am

A specialist, not a generalist with a portfolio

I am Osvaldo Noe Gonzalez Del Rio. I have spent more than twenty years around web systems: first writing them, then leading the people who write them, and now doing both for a small number of clients who need the work to be right rather than merely finished.

My background is unusual on purpose. I hold degrees in psychology, law and web systems development. Psychology taught me how people actually use an interface. Law taught me to read a specification the way an opposing party would. Engineering lets me ship it.

Today I work as an independent contractor for US clients, and I cofounded Krei.dev, SwapIt.dev and MiExpediente.app. I also research vulnerabilities in the WordPress ecosystem, where more than seventy of my findings have been published and assigned CVEs.

  • Based inMexico, working with US clients
  • FocusCustom web systems, QA/QC, security
  • CofounderKrei.dev · SwapIt.dev · MiExpediente.app
  • Research70+ vulnerabilities published
What I can do for you

Four ways I usually get hired

Most engagements start with one of these and grow from there.

  • 01

    Custom web development

    Web systems built to your requirements, not bent out of a template. From a marketing site that has to convert to an internal application your team depends on daily.

  • 02

    Security review

    Targeted reviews of WordPress stacks, plugins and themes: upload paths, sanitization, authentication and the places automated scanners never reach. The same method behind my 70+ published vulnerability findings.

  • 03

    QA/QC for delivery teams

    Process, checklists and automation that stop the same defects from shipping twice. I have built and documented these systems for agencies delivering at volume.

  • 04

    AI-assisted pipelines

    Automated pipelines that take real work off your team: code review, content, migration and testing, designed so a human still owns the outcome.

Where I have done it

Regulated industries and teams that ship

The constraints differ, the standard does not.

  • 20+Years of experience
  • 70+Vulnerabilities published
  • 3Products cofounded

  • Fintech

    Systems where a defect is measured in money and trust, and where review has to be part of delivery rather than an afterthought.

  • Marketing

    High-volume agency delivery: repeatable build-outs, design hand-offs and the QA process that keeps quality steady at scale.

  • Health

    Software handling sensitive records, where privacy and access control are requirements rather than features.

Experience

What I am doing right now

Five commitments that run in parallel. None of them is a former life: every one of these is current work.

  1. Since Jul 20251 yr 3 mos · Remote

    Bug Bounty Hunter · Security Researcher

    Wordfence Freelance

    Vulnerability research in the WordPress ecosystem: themes, plugins and the responsible disclosure process behind my published CVEs.

  2. Since Jan 20242 yrs 9 mos · Remote

    Cofounder

    Krei.dev Self-employed

    Professional websites for businesses, built and maintained by a small team that owns the whole delivery.

  3. Since Oct 20233 yrs · Remote

    Lead Web Developer (Independent Contractor)

    Cyberdogz Marketing Contract

    I build, maintain and optimize websites and digital platforms for agency clients, with performance, accessibility and security as delivery requirements rather than afterthoughts.

  4. Since Jul 20188 yrs 3 mos · Remote

    Head of Development

    RIIDE · Red de Investigación, Innovación, Desarrollo y Estadística Self-employed

    Technology for research and public-interest projects, on the premise that software can serve a purpose beyond the commercial one.

  5. Since Jan 201016 yrs 9 mos · Remote

    Cofounder

    Recetas de LuzMa Self-employed

    A digital publishing project with millions of views across multiple channels, and the longest-running thing on this list.

Full history on LinkedIn
Credentials

What I bring to the table

Education

  • Bachelor of Psychology Human behaviour and how people use systems
  • Attorney at Law Contracts, compliance and specifications
  • Web Systems Development Engineering foundation

Security research

Building & profiles

Writing

I write down what I find

Vulnerability research, quality control for creative work, and what changes when part of the output is machine-generated.

All articles
Next step

Tell me what you are building

One email is enough to start. Describe the system, the deadline and what is currently going wrong. I will tell you honestly whether I am the right person for it.

hello@osvaldogdelrio.dev

I read every message myself and reply within two business days.