I’m looking for a primarily remote role (hybrid max 1–2 days) with a frontend focus. I adapt quickly to different projects and challenges, always collaborating with teams. I’m open to learning other parts of the stack when needed, while keeping frontend as my main area of impact. I value collaborative teams, clear feedback, supportive leadership, and long-term growth.
RSLooking for a job
Rômullo Sander
@rmullosander
Senior Frontend Engineer focused on building scalable, high-performance React and TypeScript applications with real product impact.
BrazilWhat I'm looking for
I’m a Senior Frontend Engineer with 5+ years of experience building high-performance, user-centric web applications using React, Next.js, TypeScript, and modern JavaScript.
I specialize in frontend architecture, scalable design systems, accessibility, and performance optimization, and I’ve led initiatives that improved conversion rates, application performance, and overall delivery velocity.
Beyond coding, I actively mentor engineers, help refine development processes, and contribute to technical decision-making to improve team productivity and long-term code quality.
My experience includes working on high-traffic platforms, building reusable component systems with Storybook, and delivering solutions that create clear, measurable business impact across complex product journeys.
Experience
Work history, roles, and key accomplishments
MLCurrent
Led frontend initiatives for an internal Marketing Intelligence Library, re-architecting core solutions into modular, reusable structures and improving platform usability and delivery via enhanced Storybook workflows.
PS
Senior Frontend Engineer
Porto Seguro
Dec 2024 - May 2025 (5 months)
Optimized core product and purchasing flows, contributing to a 15% increase in sales and influenced architectural and tooling decisions that supported a 20% squad productivity gain.
ES
Senior Frontend Engineer
eSapiens Tecnologia S.A.
Feb 2023 - Nov 2024 (1 year 9 months)
Owned and delivered three large-scale frontend projects, built a high-traffic streaming platform for 10,000+ concurrent users and designed a design system that reduced development cycles by 30%.
TU
Frontend Engineer
Turbulent
Jun 2022 - Nov 2022 (5 months)
Improved frontend load speed by 50% and navigation efficiency by 35% through refactoring, resolved production issues that increased sales by 15%, and built AWS Lambda automations for file transformation.
FO
Frontend Engineer
Fohat
May 2020 - Apr 2022 (1 year 11 months)
Served as frontend reference across initiatives, improved interface performance by 30%, authored a Frontend Best Practices Guide that cut code review time by 50%, and drove features that increased engagement by 45%.
Education
Degrees, certifications, and relevant coursework
CF
Centro Federal de Educação Tecnológica (CEFET/RJ Nova Friburgo)
Bachelor's Degree, Information Systems
Bachelor's Degree in Information Systems completed in August 2025, covering software development, systems analysis, and IT fundamentals.
Availability
Looking for a job
Location
BrazilAuthorized to work in
Salary expectations
3k-5k USD
Social media
Skills
RemoteReactNext.jsJavascript (ES6)TypeScriptHTML5SASSReduxRedux SagaReact ReduxZustandReact QueryStorybookstyled componentsTailwindCSSMaterial UIJestReact Testing LibraryA11yREST APIsGraphQLApolloWebSocketsGitDockerAWSCI CDJavaScript (Node.JsAWS LambdaCursorGitHubJavaScriptToolkitArchitectureComponent DesignDesign SystemsPerformance OptimizationRendering InfrastructureMentorshipCollaboration
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