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Ampstek-Costa Rica · 18 hours ago

Senior React Developer

San Leandro, CA

Contract

Onsite

Senior Level

6+ years exp

Ampstek-Costa Rica is seeking a Senior React Developer with a strong programming background to lead the design and implementation of high-quality, performant front-end applications. The role involves shaping UI architecture, mentoring engineers, and collaborating closely with product, design, and backend teams to deliver resilient and scalable user experiences.

Information Technology & Services

Hiring Manager

Alok Ranjan Pathak

Responsibilities

Lead front-end architecture and develop complex, reusable React components and hooks

Drive state management patterns (e.g., Redux) and ensure predictable data flows in large applications

Integrate REST APIs, handle JSON payloads, and optimize network interactions

Enforce coding standards, conduct code reviews, and improve test coverage with Jest/React Testing Library/Enzyme

Partner with designers to implement responsive, accessible UIs using HTML5, CSS3/SASS, and component libraries (e.g., Material UI/React Bootstrap)

Champion performance and accessibility best practices; instrument and debug with modern browser tools

Collaborate in Agile ceremonies; help define stories, acceptance criteria, and release plans

Qualification

React.jsJavaScript/TypeScriptReduxHTML5CSS3/SASSJest/RTL/EnzymeGitAgile/ScrumNext.jsPerformance optimizationAccessibility (WCAG/ADA)

Required

6–10+ years of professional software development, with 4+ years focused on React.js at scale

Expert-level JavaScript/TypeScript and deep knowledge of ES6+ patterns and React internals

Proven experience with Redux, component composition, custom hooks, and performance optimization

Strong front-end engineering fundamentals: semantic HTML, modern CSS, responsive design, and accessibility (WCAG/ADA)

Hands-on testing experience (unit, integration, E2E) with Jest/RTL/Enzyme; CI integration

Proficiency with Git and common workflows; comfort with Agile/Scrum delivery

Preferred

Familiarity with Next.js, charting/grid libraries (e.g., agGrid, Recharts/Highcharts), and modern build tooling

Experience collaborating with cross-functional teams in regulated or enterprise environments

Company

Ampstek-Costa Rica

51-200 employees

Funding

Current Stage

Growth Stage

Company data provided by crunchbase