Jerson Janke
São Paulo
Summary
I'm a frontend developer with over 10 years of experience, specializing in React and Next.js. I build scalable, high-performance web applications with a strong focus on code quality, user experience, and maintainability. I'm highly proficient in tools like React Hook Form and YUP for building robust, validated forms, and I use Zustand for efficient and lightweight state management. I follow best practices in accessibility, SEO, and clean architecture, always aiming for performance and scalability in modern frontend development. Recently, I developed a medical services marketplace (surgeries, exams, and aesthetic treatments), where I was responsible for the entire purchase journey—from browsing to checkout. I also worked on a web application for validating healthcare service vouchers used by patients at partner clinics. Both projects were built using Next.js, TailwindCSS, Axios, and Zustand, with a strong focus on performance and user experience.
Overview
13
13
years of professional experience
1
1
Certification
Work History
Software Engineer
Saúde iD
07.2021 - Current
- - Developed a medical services marketplace for procedures such as surgeries, exams, and aesthetic treatments. Responsible for building product pages and implementing the entire purchase flow—from browsing to payment checkout. Leveraged Next.js, TailwindCSS, Axios, Zustand, React Hook Form, and YUP to create dynamic, validated forms, with attention to performance, SEO, and accessibility best practices.
- - Developed a web application for validating healthcare service vouchers purchased by patients at partner clinics. Built with React, styled using Tailwind CSS, integrated with APIs via Axios, and managed state with Zustand.
Software Engineer
Banco Original
02.2020 - 06.2021
- Developed a P2P lending platform that facilitates personal loans between users through an intermediary system. Built using Angular, TypeScript, and RxJS for reactive data handling.
Software Engineer
Safra
10.2018 - 02.2020
- Contributed to the development of the SafraPay sales platform for legal entities (B2B). The project focused on streamlining the acquisition and activation of payment terminals (POS), integrating with internal banking systems, and delivering a high-performance experience for the sales team. Emphasis on scalability, automation, and financial services integration.
Software Engineer
Grupo GFT
07.2018 - 10.2018
- Worked as a Frontend Developer on Itaú’s credit simulation platform for Latin America, helping to deliver a scalable and user-focused solution for financial product applications. Used Angular as the main framework, focusing on performance, modular architecture, and seamless API integration to support multi-country deployment with localized experiences.
Software Engineer
IBM
01.2018 - 07.2018
- Contributed to the development of Banco BV’s vehicle financing simulation platform, designed for customers looking to purchase new or used cars, motorcycles, or trucks. Focused on building an intuitive and responsive user interface, integrated with back-end services for installment, rate, and term calculations.
Software Engineer
Senior Sistemas
01.2015 - 12.2017
- Worked as a Frontend Developer on the HCM project, responsible for defining architecture, selecting design patterns, and developing scalable, high-performance features.
Software Engineer
FOR Sistemas
02.2013 - 04.2015
- Responsible for ensuring proper software operation through technical support, remote updates, and user assistance. Contributed to the development of system routines using Delphi, HTML, CSS, JavaScript, and PHP.
Help Desk Technician
Sisplan Sistemas
07.2012 - 02.2013
- Delivered client consulting, system deployment, and end-user training for healthcare sector clients, ensuring successful onboarding and effective platform usage.
Education
Bachelor’s Degree - Computer Software Engineering
Unicesumar
01.2022
Software Development Technician - Tecnologia da Informação
Cedup
01.2014
Skills
- Reactjs
- NextJS
Certification
- Mongo, Express, Angular e Node
- RESTful Java Web Services
- Angular (Angular 2+) & NodeJS - The MEAN Stack Guide
Languages
English (Professional Working)
Português (Native or Bilingual)
Timeline
Software Engineer
Saúde iD
07.2021 - Current
Software Engineer
Banco Original
02.2020 - 06.2021
Software Engineer
Safra
10.2018 - 02.2020
Software Engineer
Grupo GFT
07.2018 - 10.2018
Software Engineer
IBM
01.2018 - 07.2018
Software Engineer
Senior Sistemas
01.2015 - 12.2017
Software Engineer
FOR Sistemas
02.2013 - 04.2015
Help Desk Technician
Sisplan Sistemas
07.2012 - 02.2013
Software Development Technician - Tecnologia da Informação
Cedup
Bachelor’s Degree - Computer Software Engineering
Unicesumar
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