02/22/2026 updated
partially available
info: Available evenings and weekends
Senior Frontend Engineer
Petah Tikva, Israel
Worldwide
Master of Science - M.Sc., Chemical EngineeringJavaScriptApplication Programming Interfaces (APIs)AlgorithmsData AnalysisArchitectureUnit TestingCloud StorageContent ManagementFault Detection and IsolationInfrastructure ManagementMaintenanceNode.jsPerformance TuningE2e TestingMixpanel
Frontend Development
Advanced expertise in Angular, TypeScript, RxJS, NgRX, Node.js, Nest.js for building complex, high-load, deeply integrated products with strong emphasis on architecture, performance, and API design
Technical Leadership
Technical ownership of frontend domains including architecture decisions, API contracts, performance strategy, and testing approaches with proven collaboration across product, backend, design, analytics, and infrastructure teams
State Management & Testing
Advanced state management for real-time data synchronization across multiple data sources and environments using NgRX, RxAngular, and Akita with comprehensive testing strategy including Jest, integration, and E2E testing
Web Technologies
Proficiency in web3.js, viem, Solidity, ethers.js for decentralized platform development
Observability & Analytics
Implementation of error detection and monitoring using Sentry and product analytics tracking with RudderStack and Mixpanel
API Design
Contribution to API design and frontend-backend contracts with maintenance of high unit test coverage
Performance Optimization
System design patterns and algorithmic problem-solving with focus on performance optimization
Content Management
Development of content management systems for media assets from cloud storage platforms
Enterprise Libraries
Contribution to enterprise UI-kit and API-kit libraries used across internal applications
Advanced expertise in Angular, TypeScript, RxJS, NgRX, Node.js, Nest.js for building complex, high-load, deeply integrated products with strong emphasis on architecture, performance, and API design
Technical Leadership
Technical ownership of frontend domains including architecture decisions, API contracts, performance strategy, and testing approaches with proven collaboration across product, backend, design, analytics, and infrastructure teams
State Management & Testing
Advanced state management for real-time data synchronization across multiple data sources and environments using NgRX, RxAngular, and Akita with comprehensive testing strategy including Jest, integration, and E2E testing
Web Technologies
Proficiency in web3.js, viem, Solidity, ethers.js for decentralized platform development
Observability & Analytics
Implementation of error detection and monitoring using Sentry and product analytics tracking with RudderStack and Mixpanel
API Design
Contribution to API design and frontend-backend contracts with maintenance of high unit test coverage
Performance Optimization
System design patterns and algorithmic problem-solving with focus on performance optimization
Content Management
Development of content management systems for media assets from cloud storage platforms
Enterprise Libraries
Contribution to enterprise UI-kit and API-kit libraries used across internal applications
Experience
Professional experience5 - 10 years
Freelancer since2020
Languages
GermanFluentEnglishFluentRussianNative speakerHebrewFluent
Project history
Leading frontend development for next-generation decentralized platform using Angular, TypeScript, RxJS, NgRX, Node.js, Nest.js, Solidity, ethers.js, web3.js, viem. Implemented core transaction and workflow features, led end-to-end solution design for critical user journeys, owned authentication/account-connection domain, built observability practices, designed advanced state management, established testing strategy, architected analytics dashboard, and mentored junior engineers.
Developed enterprise-grade web application with rich media processing using Angular, TypeScript, Node.js, Nest.js. Collaborated with senior engineers on core platform components, designed administrative interface expanding operational capabilities by 300%, implemented features improving user engagement by 35% through A/B testing, and contributed to API design and frontend-backend contracts.
Developed internal tools and enterprise libraries under senior technical leads using TypeScript, Angular, Angular.js, NgRX. Built content management system for media assets from cloud storage platforms and contributed to enterprise UI-kit and API-kit libraries used across internal applications.