# Doron Linder

Doron Linder is a remote worker on Himalayas, Senior Full-Stack Engineer / Test Team Lead at Valstro, based in United Kingdom.

Source: https://himalayas.app/@doronlinder

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

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | United Kingdom |
| Authorized to work in | United Kingdom |
| Salary expectations | 91k+ GBP |
| Job categories | Full Stack Engineer, Test Team Lead, Frontend Engineer, Software Engineer, Java Developer, C++ Engineer |
| Skills | Fullstack Development, React, TypeScript, JavaScript, NodeJS, ExpressJS, GraphQL, Playwright, E2E Testing, Test Driven Development, Jest, Cypress, React Testing Library, API Testing, CI CD |
| Portfolio | https://vim-adventures.com |

## About

```text
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

### Senior Full-Stack Engineer / Test Team Lead (current)

Valstro. Sep 2023 - Present

```text
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.
```

Skills: 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

```text
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.
```

Skills: React, TypeScript, NestJS, AG-Grid, IndexedDB, Playwright, E2E-Testing

### Senior Full-Stack Engineer

Festicket. Jan 2022 - Aug 2022

```text
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.
```

Skills: React, TypeScript, Redux, Saga, React-Testing-Library, Cypress, SemaphoreCI, CI-CD

### Senior Full-Stack Engineer

Financial Times. Mar 2019 - Dec 2020

```text
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.
```

Skills: NodeJS, Express, Elasticsearch, React, MobX, Material-UI, Victory-Charts, Jest, Auth0, Okta, CircleCi, Heroku, Snyk

### Senior Frontend Engineer

British Pearl. Sep 2018 - Feb 2019

```text
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.
```

Skills: React, Redux, Webpack, Responsive-Design, Frontend-Development

### Senior Software Engineer

Just Retirement. Mar 2018 - Sep 2018

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

Skills: React, IdentityServer4, OpenID-Connect, Authentication, Frontend-Development

### Senior Software Engineer

WonderBill. Sep 2017 - Nov 2017

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

Skills: JavaScript, Chrome-extensions, Data-Extraction, Error-Handling, Data-Pipelines

### Lead Software Engineer

[Accenture](https://himalayas.app/companies/accenture). Feb 2017 - Aug 2017

```text
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.
```

Skills: Angular, TypeScript, NodeJS, Webpack, Test-Driven-Development, Code-Review, Mentorship, Architecture

### Senior Software Engineer

Unruly. Jul 2016 - Feb 2017

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

Skills: JavaScript, Test-Driven-Development, Pair-Programming, Agile, Frontend-Development

### Javascript Team Lead

TalkTalk. Feb 2016 - Jun 2016

```text
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.
```

Skills: AngularJS, JavaScript, Team-Leadership, Code-Review, Agile

### Senior Java Software Engineer

Cotendo. Jul 2010 - Jan 2012

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

Skills: Java, CDN, Configuration-Management, Deployment, Distributed-Systems

### Team Lead & Senior C++ Engineer

[Check Point](https://himalayas.app/companies/check-point-software). Mar 2005 - Aug 2009

```text
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.
```

Skills: C++, Team-Leadership, Mentorship, Logging-Infrastructure, High-Throughput-Systems

### C++ Developer

[SAP](https://himalayas.app/companies/sap). Jan 2003 - Jan 2005

```text
Developed the MRP algorithm used in SAP Business One.
```

Skills: C++, MRP, SAP-Business-One

## Education

### The Hebrew University of Jerusalem

Bachelor of Science, Computer Science and Business Administration. 2000 - 2003

```text
Pursued a Bachelor of Science in Computer Science and Business Administration from 2000 to 2003.
```

## Tech stack

- Kubernetes
- CircleCI
- GitHub Actions
- MySQL
- PostgreSQL
- MongoDB
- IndexedDB
- Sentry
- Node.js
- NestJS
- .NET
- Material-UI
- Okta
- Redis
- Jest
- Cypress
- React
- Webpack
- JavaScript
- HTML5
- Java
- C#
- C++
- Loki
- ExpressJS
- Grafana
- Heroku
- GraphQL
- Elasticsearch
- Redux
- TypeScript
- React Testing Library
- Auth0
- Docker
- SQL
- Snyk
- Playwright
- Vite
- AG Grid
- AWS
- REST APIs
- Azure

To contact Doron, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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