Wagner Junior — Staff Full Stack Engineer
I architect and ship scalable systems end-to-end — from high-traffic platforms serving millions to AI-powered products that push what's possible.
About
Staff-level Full Stack Engineer with 14+ years of experience building and scaling web applications in TypeScript, React, and Node.js. I ship fast, own systems end-to-end, and care deeply about developer experience and product quality.
Currently working as a Staff Engineer leading full-stack development across Node.js, React, TypeScript, PostgreSQL, Redis, Kafka, and AWS. I also build and operate production multi-agent AI systems that coordinate specialized LLM agents for autonomous task execution, with intelligent model routing and session lifecycle management across multiple agent roles.
Throughout my career I've consistently taken on technical leadership roles — driving architecture decisions, mentoring engineers, defining standards (ADRs, CI/CD, design systems), and shipping products used by millions. I'm actively building expertise at the intersection of software engineering and AI, focusing on LLM orchestration, agent architectures, and AI-powered product features as a natural extension of my full-stack background.
I work best in high-autonomy, high-velocity environments where engineering decisions directly shape the product. I bring together deep full-stack TypeScript experience, scalable architecture thinking, and hands-on AI/automation skills. Core stack: TypeScript · React · Node.js/Express/NestJS · PostgreSQL · Redis · AWS · Next.js · GraphQL · AI/LLM Integration.
Experience
Staff Full Stack Engineer — Stealth Startup
OCT 2023 — PRESENT
Staff-level engineer leading full-stack development for a US-based company, owning end-to-end product delivery from architecture through deployment in a fast-paced, high-autonomy, distributed environment. Architecting and shipping product features with React, TypeScript, Node.js/Express/NestJS, PostgreSQL, Redis, SQS, Kafka, and AWS. Leading technical decision-making on API design, data modeling, and system integration patterns. Defining engineering standards including CI/CD pipelines, monitoring strategies, and ADRs. Building production multi-agent orchestration systems that coordinate specialized LLM agents for autonomous task execution, intelligent model routing, and session lifecycle management.
- React
- TypeScript
- Node.js
- NestJS
- PostgreSQL
- Redis
- SQS
- Kafka
- AWS
- AI/LLM
Full Stack Developer — D3
Las Vegas, NV
OCT 2023 — JAN 2026
Led full-stack development of decentralized identity and tokenized domain solutions, shipping production features across React, TypeScript, NestJS, Kafka, GraphQL, and PostgreSQL in a fast-paced startup environment. Designed and shipped scalable web applications for blockchain-based digital identity, handling secure authentication flows and tokenized domain management. Built end-to-end features with full ownership from architecture to deployment. Drove technical decisions autonomously, defining API contracts, data models, and system integration patterns across the platform.
- React
- TypeScript
- NestJS
- GraphQL
- PostgreSQL
- Kafka
- Blockchain
- Web3
Front End Developer — Hotmart
JUL 2021 — OCT 2023
Tech Lead on the digital education platform serving millions of users globally. Led front-end architecture decisions, mentored engineers, and drove the adoption of modern development practices across multiple product teams. Collaborated on the architecture and implementation of the company's micro front-end platform using Module Federation, enabling independent team deployments and reducing release cycle time. Defined and enforced technical standards including ADRs, CI/CD pipelines (Jenkins, Drone), and monitoring strategies (Sentry, New Relic). Drove the evolution of the company-wide design system. Built and shipped features using React, Vue.js, TypeScript, Redux, and integrated AWS services (S3, CloudFront). Delivered internationalization (i18n) support across the platform.
- React
- Vue.js
- TypeScript
- Redux
- AWS
- Module Federation
- Design Systems
Software Engineer — Dito CRM
Belo Horizonte, BR
MAY 2019 — JUN 2021
Full-stack engineer building high-performance CRM web applications with React and serverless backend services on Google Cloud. Developed SPAs with React, TypeScript, Redux, and Styled Components, focused on performance and component reusability. Integrated serverless backend services using Google Cloud Functions, designing event-driven data pipelines. Contributed to the evolution of the company's design system, establishing shared component libraries and documentation standards.
- React
- TypeScript
- Redux
- Styled Components
- Google Cloud
Full Stack Developer — Infogest Sistemas
Belo Horizonte, BR
NOV 2016 — APR 2019
Delivered full-stack consulting across multiple clients and industries, leading modernization of legacy systems and building greenfield applications. Built web applications and refactored legacy systems using Node.js, React, Vue.js, Laravel, and GraphQL. Designed REST and SOAP API integrations, microservices architectures, and data processing pipelines. Led architectural transitions from monolithic to modern service-oriented models for enterprise clients.
- Node.js
- Laravel
- Vue.js
- React
- GraphQL
- REST
- Microservices
Full Stack Developer — EVG Sistemas
JAN 2012 — APR 2014
Customer service providing technical support and assistance in the use of commercial and accounting automation software through online chat and telephone. Application development in Delphi, PHP, and Vanilla JS.
Contact
Email: wagner.junior30@gmail.com