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Doron Linder

@doronlinder

Senior Full-Stack Engineer at Valstro who extended a trading Order Management System and built more than 170 Playwright tests.

United Kingdom

Message

At Valstro, I extended a trading Order Management System with reusable React and TypeScript components for critical order workflows. I also built a Playwright end-to-end testing platform with more than 170 tests and GitHub Actions quality gates.

At IWSR, I developed full-stack features for a local-first data-collection application using React, TypeScript, and NestJS. I added IndexedDB support for workflows that needed to remain usable with limited connectivity.

At Festicket, I modernized the event-booking platform and removed more than 65,000 lines of dead code. I also migrated end-of-life Enzyme tests to React Testing Library.

I’ve also built independent learning games, including VIM-Adventures and SQL Police Department. For SQL Police Department, I built an SQL parser from scratch and a JavaScript-based database engine.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Engineer / Test Team Lead

Current

Valstro

Sep 2023 - Present (3 years 2 months)

Extended a trading Order Management System with React and TypeScript, building reusable AG Grid and GraphQL components. Owned testing architecture, evolving a Playwright harness into a reliable E2E platform with over 170 tests and near-zero flakiness.

React TypeScript AG Grid GraphQL Playwright GitHub Actions CI CD Grafana Loki Testing E2E Testing Test Leadership

Senior Software Engineer

IWSR

Sep 2022 - Jan 2023 (4 months)

Developed full-stack features for a local-first data-collection application using React, TypeScript, and NestJS. Built data-intensive React interfaces with AG Grid and used IndexedDB for resilient local-first workflows.

React TypeScript NestJS AG Grid IndexedDB Playwright E2E Testing

Senior Full-Stack Engineer

Festicket

Jan 2022 - Aug 2022 (7 months)

Modernized the React and TypeScript codebase for an event booking platform, removing over 65,000 lines of dead code. Strengthened type safety across Redux and Saga stores and migrated Enzyme tests to React Testing Library.

React TypeScript Redux Saga React Testing Library Cypress SemaphoreCI CI CD

Senior Full-Stack Engineer

Financial Times

Mar 2019 - Dec 2020 (1 year 9 months)

Owned full-stack delivery of internal editorial tools for analytics, graph, and card generation. Rebuilt backend API layer in Node.js and Express against Elasticsearch and developed React interfaces with MobX and Material UI.

NodeJS Express Elasticsearch React MobX Material UI Victory Charts Jest Auth0 Okta CircleCi Heroku Snyk

Senior Frontend Engineer

British Pearl

Sep 2018 - Feb 2019 (5 months)

Extended and modernized a React and Redux single-page application for an online property-investment platform. Delivered investor-facing functionality and rebuilt pages with responsive React interfaces.

React Redux Webpack Responsive Design Frontend Development

Senior Software Engineer

Just Retirement

Mar 2018 - Sep 2018 (6 months)

Rebuilt and expanded a React single-page application supporting customer-facing retirement and financial-services journeys. Integrated IdentityServer4 and OpenID Connect for secure login.

React IdentityServer4 OpenID Connect Authentication Frontend Development

Senior Software Engineer

WonderBill

Sep 2017 - Nov 2017 (2 months)

Maintained Chrome extension-based data collection services for a consumer fintech platform. Improved JavaScript extraction logic and error management to deliver accurate billing data.

JavaScript Chrome extensions Data Extraction Error Handling Data Pipelines

Lead Software Engineer

Accenture

Feb 2017 - Aug 2017 (6 months)

Led development of a client-facing Angular and TypeScript application, moving builds from JIT to AOT and reducing load time by 75%. Modernized a Node.js service and built a custom Webpack loader for i18n detection.

Angular TypeScript NodeJS Webpack Test Driven Development Code Review Mentorship Architecture

Senior Software Engineer

Unruly

Jul 2016 - Feb 2017 (7 months)

Developed JavaScript frontend components for interactive advertising spaces. Applied Test-Driven Development and pair programming to maintain code quality.

JavaScript Test Driven Development Pair Programming Agile Frontend Development

Javascript Team Lead

TalkTalk

Feb 2016 - Jun 2016 (4 months)

Led a small JavaScript team building an AngularJS 1.5 application for TV set-top boxes. Coordinated tasks, reviewed code, and clarified requirements with stakeholders.

AngularJS JavaScript Team Leadership Code Review Agile

Senior Java Software Engineer

Cotendo

Jul 2010 - Jan 2012 (1 year 6 months)

Architected and implemented a Java-based deployment framework for distributing CDN configuration changes. Developed core Java services for configuration selection, validation, and controlled deployment.

Java CDN Configuration Management Deployment Distributed Systems

Team Lead & Senior C++ Engineer

Check Point

Mar 2005 - Aug 2009 (4 years 5 months)

Led the Reporter & Logging Infrastructure team with 3 C++ developers through several releases. Supported and extended the logging infrastructure, a critical high-throughput layer used by all company products.

C++Team Leadership Mentorship Logging Infrastructure High Throughput Systems