Welcome to my portfolio
Jonatas Dantas
About Me
A little about who I am and how I work
I'm a Senior Software Engineer with 7 years of experience across the full development lifecycle — design, development, testing, deployment, and operations. I've built highly scalable web and mobile applications for major players in the market, with a strong focus on TypeScript, Node.js, AWS, and React. Currently serving as Dev Lead at Orbital, a UK-based fintech operating in the blockchain and crypto space.
Clean Code
Readable, maintainable code following SOLID principles, DRY, and best practices.
High Performance
Optimised for scale — handling hundreds of thousands of requests per day.
Cloud-Native
AWS 2× Certified. Designed and deployed production systems on ECS, Lambda, and RDS.
Multidisciplinary
Comfortable across frontend, backend, mobile, and infrastructure — full product ownership.
Skills
Technologies I work with, grouped by domain
Frontend
Backend
Mobile
Infrastructure & Cloud
AI Engineering
Experience
Companies I've worked with and the impact I made
United Kingdom · Remote
Dev Lead & Senior Full Stack Engineer
Orbital
UK-based blockchain infrastructure and fintech platform enabling businesses to send, receive, and manage both fiat and crypto payments at scale.
- Designed and developed highly scalable applications handling hundreds of thousands of requests per day.
- Worked daily in the Blockchain and Fintech sector with major cryptocurrencies: Bitcoin, Ethereum, Solana, Tron, Tether, BNB, and others.
- Built the company's core Accounting solution — one of the most critical components in a fintech environment.
- Contributed to the Payment Engine: compliance checks, accounting, fund movements across FIAT and crypto vendors, and error-handling via the SAGA pattern.
- Stepped into a Tech Lead role: cross-team communication with PMs and stakeholders, driving technical decisions, and providing developer support.
Brazil · Remote
Senior Software Engineer
CI&T
Global IT services and digital transformation company headquartered in Brazil, delivering outsourced engineering teams to major enterprises worldwide.
- Allocated to one of the top audio industry companies in the US, building testable, scalable code used by thousands of customers.
- Designed and developed the Subscriptions feature: recurring payments, fraud checks, and access provisioning.
- Built automated CI/CD pipelines using GitHub Actions, AWS CloudFormation/CDK, Sonar, Jest, and Bash.
- Built new features and improved existing ones in Salesforce for an optimal end-user experience.
São Paulo, Brazil
Full Stack Software Engineer
Cleartech
Brazilian software house specialising in custom web and mobile application development for clients across various industries.
- Developed web applications using React, Angular, Vue.js, Java (Spring Boot), SQL databases, MongoDB, and Docker.
- Built cross-platform mobile applications with Ionic, Flutter, Android Studio, and Xcode.
- Deployed web applications on Linux servers using Bash scripts and Docker containers.
- Published iOS and Android apps to the App Store and Google Play.
São Paulo, Brazil
IT Intern
Delivery Direto
Brazilian food-delivery SaaS startup providing white-label ordering platforms and delivery management tools for restaurants.
- Created features for the food-delivery app using JavaScript, PHP, SQL, HTML, CSS, and Git.
- Wrote automated end-to-end tests with Cypress, Selenium, Playwright, and Jest.
Personal projects
A selection of projects I've built
OneCard
Digital business card platform built with TypeScript and Capacitor for cross-platform mobile deployment.
My Pool
Flutter app for pool service management — customers can schedule and track pool maintenance. Published on Google Play.
Estoque Total
Full-stack inventory management platform with microservices architecture, real-time stock tracking, and multi-warehouse support.
Victor Julio Fotografia
Photography portfolio website for a professional photographer, built with Angular and a clean gallery layout.
Trinity Gifts
E-commerce platform for a custom gifts store, built with React and Next.js featuring SSR product pages.
Chacara Dantas
Event hall booking website with gallery, packages, and contact form built with React and Next.js.