Yagel
Salazar.
an engineer with a designer’s soul
I build digital products people love to use.
8+ years taking ideas from backend architecture to the last pixel of the frontend — for brands like Disney, Clara and the LA Clippers. Now building AI agents and RAG systems on top of it all.
- LOC
- Actopan, Hidalgo, México
- BASE
- Mexico City · Remote-first
Senior Full-Stack Engineer & Tech Lead with 8+ years shipping type-safe systems end to end — with real care for the detail. I architect secure microservices, optimize PostgreSQL data layers, and build polished React frontends with genuine UX/UI sensibility.
- 01
Backend Architecture
Microservices & APIs in Node.js, NestJS, Express & TypeScript, with PostgreSQL schema design and query optimization.
- 02
Frontend & UX/UI
React, React Native & Next.js with design systems and a sharp eye for interfaces that feel right.
- 03
Cloud & DevOps
CI/CD pipelines, Docker deploys and cloud infrastructure across AWS & Azure.
- 04
Quality & Testing
Comprehensive Unit and E2E coverage with Jest and Cypress to keep releases reliable.
- 05
Technical Leadership
Leading Agile teams, setting architecture direction and mentoring toward clean code.
- 06
Mobile, end to end
React Native, Kotlin & Swift — production apps for hospitality, retail and live events.
- 07
AI / LLM Engineering
Multi-step LLM agents and RAG pipelines with LangChain, LangGraph, OpenAI, FastAPI and vector search — observed end to end with Langfuse.
Track record.
Reverse-chronological — global brands across fintech, streaming, retail & sports.
Unicorn fintech — corporate spend platform.
- Architecting secure microservices with NestJS, GraphQL (Apollo Federation) and Prisma over PostgreSQL, event-driven on RabbitMQ for real-time transactions and reconciliation.
- Building AI features — multi-step LLM agents and RAG pipelines with LangChain, LangGraph, OpenAI and FastAPI over an Azure AI Search vector store, observed with Langfuse.
- Python data ingestion & retrieval (Snowflake/Snowpark, Pandas, SQLAlchemy) integrating SharePoint, Confluence, Mediafly and S3.
- Shipping the Next.js web app and React Native + Expo mobile app with Redux Toolkit, TanStack Query, Apollo Client and MUI / MUI X — on an Nx monorepo.
Digital consultancy — marquee client engagements.
- Disney — as Tech Lead, architected internal dashboards and streaming-management services; OAuth/JWT auth, Jest + Cypress E2E, Docker on AWS.
- LA Clippers (NBA) — drag-and-drop live-event web app in React/Next.js with PostgreSQL, scaled across Azure and AWS.
- Alsea Omnicalidad (Starbucks, Burger King, VIPS…) — in-restaurant & delivery ordering app in React Native, Kotlin and Swift with Paycomet payments.
- Hard Rock “Unity” & Yarta — hospitality rewards app and agri-market tooling with SQL Server/PostgreSQL and Java/Spring Boot.
- Citibanamex — banking web UI for credit-card assignment and credit-line management with Maestro Avoka, Angular and Java/Spring Boot.
- Roku × HBO — performance optimization of the HBO app on Roku OS (SceneGraph, BrightScript) for the Justice League launch.
HR platform (MVP).
- Built an HR platform MVP with React, Next.js and Redux, backed by MongoDB on AWS with CircleCI.
Warehouse-management web app.
- Delivered a warehouse-management platform with React/Next.js front end and a C#/.NET + GraphQL backend on Azure.
“Saeko V2” — school-management platform.
- Built a role-based school-management web app in React with Storybook-driven components, Redux and hooks.
Earlier — Actosoft (“BuntiApp”, “Leaf”) and Brounie (“Plano Firme”): full-stack & frontend work across transport, logistics and e-commerce.
Things I’ve shipped.
- Tech Lead · Streaming
Disney
01Architected internal dashboards and streaming-management services with secure OAuth/JWT flows, and drove Unit + E2E testing.
- Full-Stack · Fintech
Clara
02Secure, type-safe microservices for a unicorn corporate-spend platform, with real-time transactions and automated reconciliation.
- Full-Stack · NBA
LA Clippers
03A dynamic drag-and-drop web app for high-traffic game days, with PostgreSQL persistence and multi-cloud scaling.
- Mobile · Multi-brand
Alsea
04In-restaurant and delivery ordering across Starbucks, Burger King, VIPS and more — shipped for Spain.
- Mobile · Hospitality
Hard Rock
05“Unity” — a rewards and reservations app for hotels and casinos, with Stripe payments on AWS.
- Frontend · Performance
Roku × HBO
06Optimized the HBO app on Roku OS for the Justice League release — close to the metal in SceneGraph and BrightScript.
- Full-Stack · Banking
Citibanamex
07Account Opening Partners — web UI for credit-card assignment and credit-line management at one of Mexico’s largest banks.
- Full-Stack · AgriTech
Yarta
08Global farm-market management tools (EagleAI, Market Intel, Livestock) with optimized SQL Server & PostgreSQL schemas.
The toolbox.
Languages
- TypeScript
- JavaScript
- Python (3.11–3.12)
- Kotlin
- Swift
- Java
- C#
- SQL
Frontend
- React
- Next.js
- React Native
- Redux Toolkit
- TanStack Query
- Apollo Client
- Material UI (MUI / MUI X)
- Recharts
- Emotion
- Tailwind CSS
- StencilJS
- Angular
- Storybook
- Vite
Backend & APIs
- NestJS
- Node.js
- GraphQL (Apollo Federation)
- REST
- Prisma ORM
- Express
- Java / Spring Boot
- C# / .NET
- RabbitMQ
- Swagger / OpenAPI
- Microservices
AI / LLM & RAG
- LangChain
- LangGraph
- OpenAI
- FastAPI
- Pydantic
- RAG
- Azure AI Search
- Langfuse
Data & Ingestion
- Snowflake (Snowpark)
- Pandas
- SQLAlchemy
- Scrapy
- EasyOCR / OpenCV
- BeautifulSoup
- Azure Blob Storage
- python-pptx / docx
Databases
- PostgreSQL
- MySQL
- SQL Server
- MongoDB
- Snowflake
Mobile
- React Native
- Expo
- React Navigation
- Reanimated
- Firebase
- react-native-maps / Mapbox
- Android Studio
Cloud
- AWS (RDS, S3, Secrets Manager)
- Azure (AI Search, Blob, Identity)
- Microsoft Graph
DevOps & Tooling
- Nx (monorepo)
- Docker
- GitHub Actions
- Jenkins
- CircleCI
- Fastlane
- Codemagic
- Git
- Bitbucket
- CI/CD
Testing
- Jest
- React Testing Library
- Supertest
- Pytest
- Cypress
Auth & Payments
- OAuth
- JWT
- Passport
- NextAuth
- Stripe
- Paycomet
Methods
- Agile
- Scrum
- Kanban
- Clean Code
EDUCATION
B.Tech, IT Engineering
ITSOEH — Hidalgo, México · Full-Stack Web Development & Computer Science
2016 — 2020LANGUAGES
Spanish — Native · English — Advanced
STRENGTHS
Leadership, critical thinking, fast learning, focus, creativity & management.