Samuel Garcia Hidalgo
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Mexico City, Mexico

Samuel Garcia Hidalgo

Senior Software Engineer | Full-Stack & Cloud Systems (React, Node.js, AWS) | Technical Leadership | Growing Focus on AI/LLM Engineering

I'm a Senior Software Engineer with 6+ years of experience building and running high-traffic web platforms. For the last 4+ years I've been embedded on Dow Jones's Barron's and MarketWatch engineering team, first through Infosys and now with Wizeline, where I lead our 7-engineer team on the account.

Portrait of Samuel Garcia Hidalgo

  • 1 to 7

    engineers on the account

    Grew Wizeline's team at Dow Jones from a single engineer to seven, running about 30 interviews and onboarding every hire.

  • 95-102%

    of planned sprint work delivered

    Up from about 80%, after building the sprint-metrics tooling that surfaced under-delivery and blockers.

  • 4+ years

    on Barron's and MarketWatch

    Full stack of a high-traffic publishing platform: Next.js, Node.js, GraphQL and the AWS edge, managed with Terraform.

  • ~60

    technical interviews conducted

    Across Infosys and Wizeline, plus mentoring about five junior developers.

Profile

About

My day-to-day covers the full stack of a large publishing platform: Next.js and React on the front end, Node.js and GraphQL services behind it, and the AWS edge in front of everything (CloudFront, Lambda@Edge, WAF, all managed with Terraform). Production incidents are part of the job too. Right now I'm leading the migration of both sites to Next.js App Router and Dow Jones's Index Design System, and I built the AI-assisted tooling the team uses for it.

On the AI side, I designed the infrastructure and backend integration for Barron's AI Stock Screener: Aurora, DynamoDB and private Bedrock endpoints provisioned with Terraform, plus a Python/FastAPI/LangChain multi-agent service running Claude on AWS Bedrock. This is where I want to keep growing: LLM systems, agents, and the infrastructure that makes them reliable in production.

I grew Wizeline's team on this account from one engineer (me) to seven. Along the way I've run around 60 technical interviews across both employers and onboarded every new hire. I also built the sprint metrics tooling that helped the team go from about 80% to 95-100%+ of planned work delivered per sprint; our delivery manager now uses its reports with the client.

I started out in mechanical engineering. My first real program was a VBA macro that cut a two-hour HVAC calculation down to 15 minutes, and I've been automating things and turning them into team tools ever since.

I'm looking for Staff or Tech Lead roles where technical strategy and making the team better count as much as writing code.

Career

Experience

  1. Wizeline

    Senior Software Engineer

    Present2 yrs 1 moMexico City, Mexico

    Tech lead for Wizeline's engineering team embedded in Dow Jones's Barron's & MarketWatch (BMW) group, covering full-stack development, AWS edge infrastructure and production support for both properties.

    • Lead the migration of Barron's and MarketWatch from Next.js Pages Router to Next.js 16 App Router and Dow Jones's Index Design System; designed and built the AI-guided migration tool (Claude-based agents, skills and guard hooks with phase-gated plans and immutable baselines) the team uses to move pages and components into the new monorepo.
    • Architected Barron's AI Stock Screener after inheriting an unrunnable prototype from another team: defined and built its Terraform infrastructure (Aurora MySQL cluster, DynamoDB conversation store, private VPC endpoints to Amazon Bedrock, IAM) inside our multi-account landing zone, and adapted the Python/FastAPI/LangChain multi-agent backend (natural-language-to-SQL over market data, Claude on Bedrock, Langfuse tracing) to run on Barron's platform. #2 contributor on both repos; in coordination with Dow Jones's infrastructure team. Currently in stakeholder evaluation and data-licensing review ahead of launch.
    • Grew Wizeline's footprint on the account from a single engineer (me) to 7, soon 9: ran ~30 technical interviews (~6 candidates per hire) and onboarded every Wizeline engineer plus Dow Jones direct hires.
    • Built the sprint-metrics tooling that surfaced under-delivery and blockers; the team went from ~80% to 95-102% of planned work delivered, and its reports are now used by Wizeline's delivery manager in client reporting.
    • Ran coaching sessions with the client's engineering manager to resolve team-wide performance concerns; act as the technical reference for the client's team lead and Wizeline's delivery manager, unblocking engineers on complex issues.
    • Respond to production incidents, including hot-fixing regressions mid-deployment on high-traffic pages.

  2. Infosys

    Technology Lead

    3 yrs 2 mosMexico City, Mexico (remote, client team based in New York)

    Full-stack engineer embedded in Dow Jones's Barron's & MarketWatch team for three years, working across everything the two domains required: front-end, back-end services and AWS edge infrastructure.

    • Developed and maintained features on Dow Jones's shared server-side-rendered platform (Node.js/Express, React, GraphQL) serving Barron's, MarketWatch and sister brands, including paywall/entitlement flows and A/B-tested experiences, with New Relic observability.
    • Co-executed the migration of Barron's from the legacy monolith to a Next.js (Pages Router) monorepo, rewriting pages and components in TypeScript with unit and integration test coverage.
    • Maintained the CloudFront/Terraform edge layer for both domains (cache and origin-request policies, WAF, Lambda@Edge redirects) in a multi-account nonprod/staging/prod setup, and participated in production incident response.
    • Worked in a Scrum team with US-based product and engineering stakeholders, in English, across all ceremonies.
    • Mentored ~5 junior developers and conducted ~30 JavaScript/React technical interviews for Infosys; recognized with an Insta Award (2022).

  3. Technogi

    Developer and Support Engineer

    5 mosMexico City Metropolitan Area

    • Efficiently managed and optimized code for complex web applications.
    • Led development of the Dentegra mobile app from scratch using React Native, delivering approximately 80% of the planned functionality before transitioning to a new opportunity.
    • Expanded my skill set by working with modern technologies, including React, Next.js, Node.js, Java Spring Boot, MongoDB, and React Native.
    • Gained hands-on experience with AWS deployment and cloud services, using the JavaScript SDK for cloud integration and management.
    Scope and responsibilities
    • Developed and maintained complex web applications using React and Next.js for the front-end, and Node.js or Java Spring Boot for the back-end.
    • Worked primarily on projects for Dentegra and Deli Life, handling feature requests and resolving bugs within existing codebases.
    • Managed database operations using MongoDB.
    • Used AWS services for deployment, leveraging the AWS SDK for JavaScript to integrate and manage cloud services.
    • Led the development of the Dentegra mobile app from scratch using React Native.

  4. Clico Digital Marketing

    Front End Developer

    7 mosMexico City Metropolitan Area

    • Played a crucial role in upgrading the technical capabilities of the company by moving from Elementor templates to fully customized WordPress sites, allowing for greater flexibility, performance, and design innovation.
    • Migrated 8-10 client websites from Elementor to fully custom WordPress builds, including high-profile projects for clients such as The Beer Factory, Ibero Monterrey, Akash Consultores, Industrias Vijusa, and Brokers Financieros.
    • Introduced the use of React in certain projects, enabling the development of more dynamic and responsive user interfaces.
    • Successfully modernized the company's web development workflow, providing clients with tailored solutions that better aligned with their business needs and branding, contributing to client satisfaction and retention.
    Scope and responsibilities
    • Developed custom WordPress themes and plugins using PHP, HTML, CSS, and JavaScript, transitioning the company away from template-based design (Elementor) to fully custom solutions.
    • Enhanced website performance through optimization techniques using Webpack, JavaScript, and jQuery.
    • Implemented SEO on-page strategies.
Earlier career: 4 roles before software

  1. Branch Manager at Grupo Confort Nacional

    Led a newly opened HVAC sales branch end to end: sales pipeline, warehouse and logistics, and hiring, interviewing and onboarding the branch's staff. Branch closed in July 2020 due to the COVID-19 pandemic.

  2. Technical Sales at Grupo Confort Nacional

    Technical pre-sales for HVAC projects: on-site requirements assessment, system sizing and design, and detailed quotations bridging the sales and engineering teams.

  3. Design Trainee at Rheem México

    HVAC design trainee who taught himself VBA to automate thermal-load calculations, cutting each from two hours to 15 minutes, then built an Excel-based quoting tool with a product/pricing database and a project-tracking database that became the B2B team's weekly reporting source.

  4. Vehicle Homologation Officer at Centro de Investigación e Innovación Tecnológica (CIITEC)

    Ran the originality-certification process for classic vehicles against strict regulatory criteria, documenting technical assessments; developed the structural-analysis skills applied in my thesis (mobile command center for disaster response).

Toolbox

Skills

Frontend

  • React
  • Next.js
  • TypeScript
  • JavaScript
  • Web Performance

Backend & APIs

  • Node.js
  • GraphQL
  • REST APIs
  • Python
  • FastAPI
  • Java
  • Redis

Cloud & Infrastructure

  • AWS
  • Terraform
  • Infrastructure as Code
  • Amazon CloudFront
  • AWS Lambda
  • Amazon S3
  • CI/CD
  • Jenkins
  • Git

AI & LLM Engineering

  • LLMs
  • AI Agents
  • Amazon Bedrock
  • LangChain
  • Generative AI
  • AI

Architecture & Security

  • Software Architecture
  • System Design
  • Cybersecurity
  • Cryptography

Leadership

  • Technical Leadership
  • Mentorship
  • Agile Methodologies
  • Communication
  • Teamwork

Background

Education and languages

  • Bachelor degree in Mechanical Engineering

    Instituto Politécnico Nacional

Languages

Spanish
Native or bilingual proficiency
English
Professional working proficiency
German
Elementary proficiency

Credentials

Certifications and honors

Honors

  • Insta Awards

    Certificate of Appreciation for my commitment to my assignment and the Infosys processes.

Essays

Writing

  • Thoughts on Digital Ontology

    Medium ·

    Essay reading the digital world through Plato's Divided Line and object-oriented programming: whether software abstractions move us closer to universal truths or deeper into representations, and the ethical questions of building and inhabiting digital spaces.

Projects

Independent work

  • DiscimusLT

    Worked on multiple projects for individuals and small businesses delivering web development solutions tailored to their specific needs. Developed various Single Page Applications (SPAs) using React. Built RESTful APIs with Node.js for back-end services. Deployed the projects on AWS EC2 instances using Nginx for server management. Managed domain setups and configurations, including email administration, for my personal domain discimuslt.com, inspired by the Latin phrase "Docendo discimus" ("by teaching, we learn"). Delivered multiple custom web solutions for third-party clients, managing the full development lifecycle from project scoping to deployment and support.

Contact

Get in touch

Open to Staff Engineer and Tech Lead conversations. The fastest ways to reach me are below.