Dear Twine Hiring Team, I am applying for the Full Stack Engineer – Freelance Contract position at Twine. With 7+ years of hands-on experience building scalable web applications — with a strong emphasis on React/JavaScript front-ends and Python back-ends — I am confident I can contribute meaningfully to your R&D team and help deliver innovative digital solutions for leading DTC brands. Front-end engineering is where I spend most of my time. At my current project, Lummia, I architected a multi-tenant Next.js/React platform where each clinic gets its own branded booking site, resolved dynamically via custom domain routing and Upstash Redis caching. I have built component libraries, optimized rendering pipelines, and shipped responsive interfaces across web and mobile (React Native) — always in close collaboration with product and design. I have a deep appreciation for the details that separate a functional UI from a delightful one. On the back-end, I have used Python extensively for automation and AI-driven workflows. I built lead enrichment pipelines with LangChain and Gemini/Ollama that scrape, analyze, and persist structured data — entirely in Python. My broader back-end experience spans Django, NestJS, Express, and PostgreSQL, with a consistent focus on clean architecture and scalable design. Cloud infrastructure is a natural part of my workflow. I manage AWS S3 presigned uploads, CloudFront-signed media delivery, EC2 deployments, and CI/CD pipelines (Vercel, Bitrise, GitHub Actions). I have reduced release overhead by 80% in a previous role by standardizing pipelines, enabling six consecutive monthly releases without regressions. I thrive in remote, asynchronous environments. I have led distributed Scrum teams and delivered MVPs in Kanban-driven workflows for years — communicating daily in English with international stakeholders, writing clear documentation, and staying aligned across time zones. Working independently while staying closely integrated with the team is simply how I operate. The opportunity to work in an AdTech R&D environment on fast-moving products for DTC brands is genuinely exciting. I enjoy working on problems where performance, scalability, and product quality all matter at once — and I am ready to contribute from day one. I would love the opportunity to speak with your team. Thank you for your time and consideration.

Pedro Henrique de Souza Araújo

Dear Twine Hiring Team, I am applying for the Full Stack Engineer – Freelance Contract position at Twine. With 7+ years of hands-on experience building scalable web applications — with a strong emphasis on React/JavaScript front-ends and Python back-ends — I am confident I can contribute meaningfully to your R&D team and help deliver innovative digital solutions for leading DTC brands. Front-end engineering is where I spend most of my time. At my current project, Lummia, I architected a multi-tenant Next.js/React platform where each clinic gets its own branded booking site, resolved dynamically via custom domain routing and Upstash Redis caching. I have built component libraries, optimized rendering pipelines, and shipped responsive interfaces across web and mobile (React Native) — always in close collaboration with product and design. I have a deep appreciation for the details that separate a functional UI from a delightful one. On the back-end, I have used Python extensively for automation and AI-driven workflows. I built lead enrichment pipelines with LangChain and Gemini/Ollama that scrape, analyze, and persist structured data — entirely in Python. My broader back-end experience spans Django, NestJS, Express, and PostgreSQL, with a consistent focus on clean architecture and scalable design. Cloud infrastructure is a natural part of my workflow. I manage AWS S3 presigned uploads, CloudFront-signed media delivery, EC2 deployments, and CI/CD pipelines (Vercel, Bitrise, GitHub Actions). I have reduced release overhead by 80% in a previous role by standardizing pipelines, enabling six consecutive monthly releases without regressions. I thrive in remote, asynchronous environments. I have led distributed Scrum teams and delivered MVPs in Kanban-driven workflows for years — communicating daily in English with international stakeholders, writing clear documentation, and staying aligned across time zones. Working independently while staying closely integrated with the team is simply how I operate. The opportunity to work in an AdTech R&D environment on fast-moving products for DTC brands is genuinely exciting. I enjoy working on problems where performance, scalability, and product quality all matter at once — and I am ready to contribute from day one. I would love the opportunity to speak with your team. Thank you for your time and consideration.

Available to hire

Dear Twine Hiring Team,
I am applying for the Full Stack Engineer – Freelance Contract position at Twine. With 7+ years of hands-on experience building scalable web applications — with a strong emphasis on React/JavaScript front-ends and Python back-ends — I am confident I can contribute meaningfully to your R&D team and help deliver innovative digital solutions for leading DTC brands.
Front-end engineering is where I spend most of my time. At my current project, Lummia, I architected a multi-tenant Next.js/React platform where each clinic gets its own branded booking site, resolved dynamically via custom domain routing and Upstash Redis caching. I have built component libraries, optimized rendering pipelines, and shipped responsive interfaces across web and mobile (React Native) — always in close collaboration with product and design. I have a deep appreciation for the details that separate a functional UI from a delightful one.
On the back-end, I have used Python extensively for automation and AI-driven workflows. I built lead enrichment pipelines with LangChain and Gemini/Ollama that scrape, analyze, and persist structured data — entirely in Python. My broader back-end experience spans Django, NestJS, Express, and PostgreSQL, with a consistent focus on clean architecture and scalable design.
Cloud infrastructure is a natural part of my workflow. I manage AWS S3 presigned uploads, CloudFront-signed media delivery, EC2 deployments, and CI/CD pipelines (Vercel, Bitrise, GitHub Actions). I have reduced release overhead by 80% in a previous role by standardizing pipelines, enabling six consecutive monthly releases without regressions.
I thrive in remote, asynchronous environments. I have led distributed Scrum teams and delivered MVPs in Kanban-driven workflows for years — communicating daily in English with international stakeholders, writing clear documentation, and staying aligned across time zones. Working independently while staying closely integrated with the team is simply how I operate.
The opportunity to work in an AdTech R&D environment on fast-moving products for DTC brands is genuinely exciting. I enjoy working on problems where performance, scalability, and product quality all matter at once — and I am ready to contribute from day one.
I would love the opportunity to speak with your team. Thank you for your time and consideration.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Fluent
Portuguese
Fluent
Spanish; Castilian
Intermediate

Work Experience

Software Engineer at Cadalys
August 1, 2025 - December 1, 2025
Software Engineer with strong experience across healthcare, fintech, and enterprise applications, building scalable full-stack systems using modern JavaScript technologies such as Next.js, Vite, Express, and Prisma ORM. Specialized in integrating AI and LLM solutions including OpenAI GPT, prompt engineering, and retrieval-augmented architectures to automate workflows and enhance user experience. Skilled in distributed systems, performance optimization, and cross-platform integrations. Proven track record leading end-to-end delivery of complex products, improving development processes, and driving innovation across engineering teams.
Software Engineer at My Digital Nomads
May 1, 2023 - August 1, 2023
Architected and built reusable boilerplate kits for social networks and marketplaces using Next.js and TypeScript, reducing new project setup time by 70% and reinforcing modern web technologies expertise while emphasizing clean code practices. Integrated authentication modules, media upload flows, and real-time communication features that supported both frontend and backend functionalities, leveraging Git proficiency and automated testing practices. Collaborated with cross-functional teams to prototype and deliver user-friendly web applications, applying security compliance, performance monitoring, and customer-centered development principles.
Software Engineer at Freelancer
January 1, 2019 - December 31, 2019
Built SPAs in React with Firebase & Algolia integrations for multiple clients. Implemented CI/CD pipelines on Bitrise and Vercel for automated mobile/web deployments.
Software Engineer at Coplan
January 1, 2018 - December 31, 2019
Analyzed legacy jQuery systems and rewrote reporting modules using JasperReports and SQL. Designed custom UI and back-end components following MVC in both Waterfall and Agile environments.
Software Engineer at Ábaco
January 1, 2016 - December 31, 2018
Developed modules for auction control and educational administration: UI, business logic, and database layers. Created management reports with JasperReports and optimized SQL queries for performance. Collaborated in Waterfall and Scrum teams alongside business analysts and QA engineers.
Full-Stack Engineer & Technical Lead at Lummia (SaaS – Own Project)
January 1, 2024 - Present
Architected a multi-tenant React/Next.js frontend with hostname-based routing and Upstash Redis-backed tenant domain resolution, plus per-tenant white-label booking sites. Built Python-adjacent automation pipelines using LangChain + Gemini/Ollama for lead enrichment (Firecrawl scrape → LLM analysis → Prisma persistence). Integrated AWS S3 presigned uploads and CloudFront-signed delivery with fallback strategies for scalable media handling. Implemented Stripe Connect checkout with destination transfers, platform application fees, and webhook-driven subscription lifecycle sync. Orchestrated async workflows with Inngest: Google Calendar sync, transactional emails, and time-shifted reminders with post-sleep state re-validation. Enforced code quality via Biome, Husky, commitlint in a Turbo monorepo (Yarn workspaces).
Project Lead & Senior Full-Stack Engineer at Previous Employer (Fintech/Healthcare)
January 1, 2021 - January 1, 2024
Scrum lead for a 5-engineer team delivering React and React Native front-ends powering 5,000+ MAU. Improved application performance through PostgreSQL query optimization and selective Prisma patterns. Reduced release overhead by implementing CI/CD pipelines (Bitrise + Vercel), enabling 6 consecutive monthly releases with zero regressions. Collaborated closely with product and design teams in a fully remote environment to hit aggressive MVP deadlines.
Full-Stack Engineer at My Digital Nomads
January 1, 2019 - January 1, 2021
Designed reusable Next.js and Express boilerplates reducing new project setup time by 70%. Containerized services with Docker and implemented daily CI pipelines for web and mobile targets. Delivered multiple client MVPs under aggressive timelines in a remote, Kanban-driven workflow.
Founder & Full-Stack Engineer at BuildUPFit (Own Project)
January 1, 2023 - Present
AI-powered fitness platform integrating OpenAI and LLaMA for personalized workout generation. Designed cloud infrastructure on AWS (EC2, S3, CloudFront) and implemented Algolia-powered search.

Education

Bachelor's in Computer Science at Federal University of Mato Grosso
January 1, 2013 - January 1, 2018
B.Sc. in Information Systems at Universidade do Sul de Santa Catarina (Unisul)
January 1, 2016 - January 1, 2020
B.Sc. at Universidade do Sul de Santa Catarina (Unisul)
January 1, 2016 - January 1, 2020

Qualifications

Add your qualifications or awards here.

Industry Experience

Healthcare, Software & Internet, Professional Services, Financial Services, Life Sciences, Computers & Electronics, Media & Entertainment