Senior Fullstack Java/React Developer

Starian

Fullstack Developer focusing on SaaS solutions for Construction, Legal Intelligence, Operational Efficiency, and Governance. Collaborate on AI-driven processes and user experience optimization.

Posted 6/8/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptJestReactTypeScript

About the role

Key responsibilities & impact

Contribute to robust, sustainable, and results-oriented solutions;
Work with technical autonomy, collaborating on planning and mentoring more junior developers;
Help build a software engineering environment focused on quality, performance, user experience, and continuous improvement;
Use AI tools (such as Windsurf, Copilot, JetBrains AI, Anthropic) to accelerate development and test automation;
Technologies in our stack include: React, JavaScript, TypeScript, CSS, Git, and other frontend ecosystem tools;
Collaborate on evolving reusable components, interface patterns, and frontend development best practices;
Have a digital mindset, curiosity for new technologies, and an interest in how Artificial Intelligence can transform processes, experiences, and outcomes.

Requirements

What you’ll need

Strong experience with React.js, including hooks, Context API, componentization, state management, and integration with RESTful APIs;
Proficiency in JavaScript, HTML, and CSS (experience with TypeScript is a plus);
Knowledge of Design Systems and user experience (UX), focusing on consistency, maintainability, and scalability (experience with Storybook and Material-UI is a plus);
Experience with automated testing (unit and integration) using Jest and React Testing Library;
Experience using AI development tools such as GitHub Copilot, Windsurf, JetBrains AI, Anthropic, ChatGPT, among others;
Knowledge of, or interest in, Artificial Intelligence technologies: tools, applications, and concepts.

Benefits

Comp & perks

Meal allowance / meal voucher;
Health and dental insurance;
Home office allowance;
Profit Sharing;
Voucher for setup kit;
Life insurance;
Birthday day off;
GoGood | Conexa;
Health and wellness promotion program;
Partnerships and discounts.

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

React.jsJavaScriptTypeScriptCSSHTMLautomated testingunit testingintegration testingcomponentizationstate management

Soft Skills

collaborationmentoringcuriositydigital mindsetfocus on qualityfocus on performancefocus on user experiencecontinuous improvement