Senior full-stack engineer
Full-Stack Engineer
Available for hire
Years of
experience
10+ years
Experience
level
Senior
Available
for
Full-time, Part-time, Contract, Freelance
Available from
23 Jun 2026
Senior full-stack specialist in frontend Engineer and Tech Lead with around 10 years of experience building production React and TypeScript applications, from consumer SaaS products to enterprise industrial platforms operating in mission-critical offshore environments. Strong background in frontend architecture, performance optimization, design systems, automated testing, accessibility, observability, API integration, and AI-assisted development workflows.
Recent Tech Lead experience spanning technical delivery, architecture decisions, ISO 27001 compliance, hiring, mentorship, and engineering roadmap planning with a significant share of delivery capacity allocated to contracts with enterprise clients including Petrobras, ADNOC, and ProPetro. Led teams of up to 10 engineers and contributed to production systems supporting 4 active offshore deployments processing up to 100,000 events per second. Experienced working fully in English with distributed international teams across New Zealand, Japan, Hungary, and Brazil.
📌 Side project: KartingOS a full-stack SaaS platform for rental kart analytics (Built with MongoDB, Express, React Node.js, TypeScript, Zod, Zustand and Tesseract.js for OCR).
Skills
Languages
Employment History
Tech Lead at
Intelie
2023
-
2026
Led the technical delivery of an industrial IoT 4.0 platform under enterprise contracts, managing a cross-functional team of up to 10 engineers across frontend, backend, and design.
Production systems supported 4 active offshore deployments processing up to 100,000 events per second, with delivery spanning 10 concurrent Java/Spring Boot and TypeScript/React projects simultaneously.
Key contributions:
• Drove ISO 27001 compliance across all projects, coordinating OWASP vulnerability remediation and Black Duck open-source audits. Directly contributed to two consecutive contract renewals through delivery predictability and regulatory compliance.
• Redesigned event-driven transmission from periodic payloads to a delta-based update model, significantly reducing bandwidth consumption in remote offshore deployments where connectivity is constrained.
• Raised automated test coverage from 40% to 70% across the platform by expanding Jest, React Testing Library, and Playwright suites.
• Mentored 3 engineers with concrete outcomes: one promoted to Senior over two years, one to Mid-level over one year, and one placed in a new external role in six months.
• Established ADR and RFC practices for architecture documentation and decision traceability across the team.
• Authored OKRs and yearly engineering roadmaps, with a significant share of delivery capacity allocated to contract commitments with Petrobras, ADNOC, and ProPetro.
• Contributed to engineering hiring through technical interviews and leveling calibration.
Stack: React 18, TypeScript, Redux, Java, Spring Boot, WebSockets, Jest, Playwright, React Testing Library, Storybook, ISO 27001, OWASP, Industry protocols as MQTT, WITSML, Modbus
Senior frontend developer at
Mika Paytech
2023
-
2025
Owned frontend architecture and delivery for two independent fintech CRM portals in a fully distributed international team spanning New Zealand, Japan, Hungary, and Brazil, working 100% in English.
Key contributions:
• Built two CRM portals with React 18, TypeScript, Redux, Vite, and Vitest, including Recharts data visualization for fintech KPIs.
• Designed secure authentication flows using AWS Cognito and Amplify, with standardized error handling and resilience patterns for KYC onboarding.
• Built sequential KYC onboarding flows with React Hook Form, role-based access control, permission management, and accessibility coverage (WCAG 2.1, ARIA).
• Implemented frontend observability using Datadog RUM and Sentry to track user-facing errors, performance regressions, and API latency.
• Applied Core Web Vitals analysis, code splitting, lazy loading, and bundle optimization for frontend performance across both portals.
Stack: React 18, TypeScript, Redux, Vite, Vitest, AWS Cognito, Amplify, Datadog RUM, Sentry, React Hook Form, Recharts, WCAG 2.1, ARIA
Senior Frontend Developer at
Intelie
2019
-
2023
Acted as a senior frontend engineer within a real-time industrial IoT platform, leading the development of complex dashboards and monitoring tools built with React and TypeScript and tightly integrated with Java and Kotlin Spring Boot backends.
Owned the evolution of the frontend architecture by modernizing legacy React 16 codebases, migrating class components to hooks, reducing technical debt, and introducing clearer state management patterns. Led initiatives to reduce prop drilling, improve component isolation, and enforce stronger TypeScript typing standards.
Collaborated directly with backend engineers to define API contracts and ensure robust REST and WebSocket integrations, contributing to feature rewrites and incremental migrations including Kotlin-based backend services.
Improved platform performance and scalability by optimizing rendering strategies, implementing table virtualization for large datasets, and reducing page load times in data-intensive dashboards.
Strengthened engineering quality by promoting SOLID, DRY and Clean Code principles, improving testability and lowering cyclomatic complexity across critical modules. Expanded automated test coverage using Jest, React Testing Library and Playwright to increase reliability in a real-time industrial environment.
Worked closely with product designers to translate Figma prototypes into production-ready interfaces and structured reusable component libraries using Storybook, ensuring UI consistency across multiple platform modules.
Contributed to continuous improvements in UI/UX, performance, maintainability, and overall system reliability, becoming a technical reference within the team prior to formally stepping into a leadership role.
Education
Postgraduate on gamedesign at
Estácio
2023
-
2025
Bacher on systems analysis at
Unicarioca
2017
-
2020