Fullstack Engineer

Kayzen

Fullstack Engineer developing high-quality features for Kayzen’s mobile demand-side platform. Collaborating with various teams and integrating AI-assisted tools into development processes.

Posted 7/1/2026full-timeRemote • 🇮🇳 IndiaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive Fullstack development expertise with modern JavaScript/TypeScript, proficiency in major frameworks like React, Angular, or Vue, and a strong understanding of performance optimization and testing methodologies. Capable of integrating AI-assisted tools to enhance productivity while delivering user-centric features and maintaining code quality.

Highest-signal resume keywords

Fullstack DevelopmentJavaScript/TypeScriptReact/Angular/Vue FrameworksPerformance OptimizationAI-Assisted Development Tools

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Fullstack DevelopmentJavaScriptTypeScriptReactAngularVueHTML5CSS3State Management PatternsFullstack Testing Methodologies

Soft Skills

CollaborationOwnershipProblem-SolvingCommunication

Tools & Technologies

JestCypressPlaywrightReduxMobXZustandAI-Powered Coding AgentsLLM-Based Testing

Industry Keywords

User-Centric FeaturesReal-Time Data VisualizationResponsive DesignCross-Browser CompatibilityTechnical Debt

Tech Stack

Tools & technologies

AngularCypressJavaScriptJestMobXReactReduxTypeScriptVue.js

About the role

Key responsibilities & impact

Design, build, and maintain high-quality features across the Fullstack stack, from UI to API integration
Write clean, well-tested, production-ready code and actively participate in code reviews
Collaborate closely with Product, Design, QA, and Backend teams to deliver cohesive, user-centric features
Contribute to technical decisions around architecture, tooling, and best practices within the team
Take ownership of features end to end, from planning through deployment and monitoring
Integrate AI-powered coding agents and automated LLM-based testing into your daily development cycle
Contribute to building 'AI-First' UI patterns, working alongside the LLM Platform team on generative, prompt-driven interfaces
Stay current with emerging AI-assisted development tools and bring relevant ones back to the team
Break down assigned product requirements into clear, actionable engineering tasks
Deliver work reliably within sprint commitments, flagging blockers or scope changes early
Balance new feature delivery with addressing technical debt in the codebase you work on

Requirements

What you’ll need

5+ years of professional Fullstack development experience with modern JavaScript/TypeScript
Solid expertise in at least one major framework (React, Angular, or Vue) and its ecosystem
Strong understanding of HTML5, CSS3, responsive design, and cross-browser compatibility
Experience building data-heavy UIs, ideally including real-time data visualization
Good grasp of Fullstack performance optimization, including bundle size, rendering, lazy loading, and caching strategies
Experience with state management patterns (Redux, MobX, Zustand, or similar)
Working knowledge of Fullstack testing methodologies, unit, integration, and end-to-end (Jest, Cypress, Playwright, or similar)
Comfortable working with design systems and shared component libraries
Experience using AI-assisted development tools (e.g., Claude Code) to boost engineering productivity

Benefits

Comp & perks

Exceptional career growth and learning opportunity
A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market
A fun, driven, and multinational team located across Germany, India, UK, Argentina, Ukraine, Turkey, Spain and many more countries
A flexible work-from-home arrangement
A 500-dollar home-office setup budget
A 1000-dollar annual learning and development budget