Ana Caroline Sinigaglia
Ana Caroline Sinigaglia

Senior Frontend Engineer

Open to offers · Member since 2 Sep 2026
Message
Location
São Paulo, Brazil
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Part Time, Contract, Freelance
Experience level
Senior

About

Professional summary

I am a Frontend Engineer with more than five years of experience building production-grade web applications with React, TypeScript, Next.js, and modern frontend architecture. I specialize in creating scalable, high-quality interfaces for B2B, fintech, insurance, logistics, and enterprise platforms.

I have led the development of enterprise SPAs, reusable design systems, component libraries, complex multi-step workflows, secure authentication experiences, and payment-related user journeys. My work combines strong UI engineering with practical attention to performance, accessibility, maintainability, and user experience.

I am experienced in full-stack collaboration and have built backend APIs using Node.js, GraphQL, PostgreSQL, PostGIS, and ORM technologies. I also integrate frontend applications with REST APIs, GraphQL services, payment systems, cloud infrastructure, and AI-powered automation.

I place a strong emphasis on software quality through unit, integration, and end-to-end testing, code reviews, linting standards, and CI/CD automation. I have improved test coverage, reduced deployment times, standardized development environments, and strengthened production observability.

I enjoy collaborating with cross-functional and international teams, mentoring peers, and taking ownership of technically complex products. I am particularly interested in frontend architecture, design systems, cloud-native applications, feature experimentation, and practical generative AI solutions.

Skills

40 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Founding Frontend Engineer Tutors Holding

Architected four enterprise single-page applications using React, TypeScript, and Vite, centralizing fragmented workflows into a B2B platform that generated more than BRL 1 million in revenue. Built scalable frontend state management and authentication-aware Axios clients to streamline feature delivery.

Developed secure multi-step registration workflows with React Hook Form, Yup, and role-based access control. Integrated Claude and OpenAI through Supabase Edge Functions, used Zod and prompt engineering for reliable structured outputs, established Jest and Cypress testing pipelines, and reduced deployment time by 75% through GitHub Actions, AWS Amplify, and Sentry observability.

Frontend Engineer Ingresso Seguro

Delivered a client-facing insurance application using React, TypeScript, and Vite for a ticket insurtech platform that scaled beyond one million insured tickets and 200,000 protected users. Designed a complex multi-step policy purchase experience with React useReducer and Material UI.

Implemented Stripe Elements and server-side PaymentIntents to provide a secure checkout flow and prevent client-side price manipulation. Connected REST APIs from SUSEP-regulated insurers to automate real-time policy issuance, dependent management, and PDF generation.

Frontend Engineer Cayena

Built core B2B payment interfaces and logistics dashboards using React and TypeScript, supporting high-volume financial workflows and split-billing transactions. Created a private UI component library with Material UI v5, Emotion, TypeScript, Figma design tokens, Storybook, and GitHub Package Registry distribution.

Introduced GrowthBook feature flags for progressive releases, A/B tests, and tenant-based toggles. Optimized Webpack 5 build pipelines and Core Web Vitals, increased unit test coverage from below 50% to above 80% with Jest and React Testing Library, and mentored peers on code quality standards.

Full-Stack Engineer Iteris Consulting

Built scalable Node.js and TypeScript backend APIs using Apollo GraphQL Federation. Modeled and queried geospatial crop-planning datasets and farm boundaries with PostgreSQL, PostGIS, and Sequelize, while contributing to React and React Native interfaces for the Brazilian market portal.

Collaborated with cross-border engineering and business stakeholders to implement multilingual internationalization. Configured LaunchDarkly for safe feature rollouts across web and mobile products serving more than one million active users, standardized Docker-based local environments, automated database migrations, and promoted unit testing and technical documentation.

Education

Learning history

UNIPDS

Postgraduate, Applied AI Engineering

Postgraduate program in Applied AI Engineering, currently in progress.

PUC

Postgraduate, Software Architecture, Cloud, Data Science & Cybersecurity

Completed a capstone on cloud architecture optimization for InsureSphere, designing a serverless migration from EC2 to AWS Amplify, Lambda, and SQS for scalable and decoupled batch policy processing.

Unicesumar

Associate Degree, Systems Analysis and Development

Federal University of São Paulo (UNIFESP)

Bachelor of Science, Nutrition

Developed a quantitative foundation in scientific research, statistical data analysis, and technical documentation.

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