Feyzullah Daldal, Developer in London, United Kingdom
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Feyzullah Daldal

Verified Expert  in Engineering

Full-stack Developer

London, United Kingdom
Toptal Member Since
December 7, 2021

Feyzullah is an experienced and ambitious full-stack developer with a proven track record in the banking, fintech, advertising, marketing, and healthcare services industries and a genuine interest in all software technologies. Feyzullah develops holistic solutions to complex problems, pays meticulous attention to detail, and thrives on managing concurrent projects in deadline-driven environments while communicating effectively with colleagues, clients, and other stakeholders.


Access Fintech
JavaScript, React, GraphQL, Node.js, API Design, Software Architecture
Fathom London
React, JavaScript, AngularJS
Morgan Stanley
AngularJS, Bootstrap




Preferred Environment

MacOS, Node.js, Browsers

The most amazing...

...thing I have developed was an online "Wheel of Fortune" game hosted by an industrial robot.

Work Experience

Solution Architect

2017 - 2021
Access Fintech
  • Implemented a generic product that can be configured for any sector to manage risk.
  • Implemented a GraphQL middleware back end using Node.js and Apollo Server in TypeScript.
  • Designed APIs to perfectly fit the front end and the product requirements while overcoming performance problems caused by a generic software approach.
  • Prototyped multiple database solutions to support new features and scale the product quickly.
Technologies: JavaScript, React, GraphQL, Node.js, API Design, Software Architecture

Senior Full-stack Developer

2016 - 2018
Fathom London
  • Completed six projects by building bespoke user interfaces and UX that perfectly fit the clients' needs.
  • Implemented complex financial charts using D3.js and Highcharts.
  • Helped the company move from AngularJS. to React.js.
Technologies: React, JavaScript, AngularJS

Senior Full-stack Developer

2016 - 2016
Morgan Stanley
  • Migrated the project to use flexbox instead of hardcoded dimensions for the layouts.
  • Applied bespoke bootstrap themes to a large project.
  • Implemented forms with hundreds of fields while ensuring their high performance.
Technologies: AngularJS, Bootstrap

Senior Full-stack Developer

2015 - 2015
  • Built a Node.js back end with bespoke REST APIs for the iOS client.
  • Implemented an API layer and displays on iOS using Objective-C.
  • Created an event-driven sync tool that gathers event information from various music and event sources.
Technologies: iOS, Objective-C, Node.js, PostgreSQL

Full-stack JavaScript Developer

2014 - 2015
Jacobean R&D
  • Implemented a compiler that converted SCXML documents into JavaScript files on most JavaScript platforms and exposed an API to automatically generate state charts and display real-time events.
  • Created a call center system using state machines and SCXML.
  • Improved the compiler and the engine to fully support the W3C SCXML specification.
  • Developed SCXML state machines to self-heal Docker containers.
Technologies: Node.js, Docker, State Machines, AngularJS, PostgreSQL, Redis

Full-stack JavaScript Developer

2014 - 2014
  • Built a full-stack Cordova AngularJS application (iOS, Android and Node.js) for Kagen Allergy Clinic that provides crucial information for people suffering from allergies.
  • Implemented scheduled programs that gathered real-time weather data from NOAA and other weather agencies, using Node.js.
  • Built a D3.js chart displaying pollen and weather information over a world map.
Technologies: Node.js, Cordova, iOS, AngularJS, D3.js

Creative Technologist

2012 - 2014
McCann Erickson
  • Created an interactive factory tour for Coca-Cola using HTML5 canvas and a video player.
  • Built a real-time website for Turkish Airlines EuroLeague final four that displayed texts, pictures, and video content from social media.
  • Worked on the Turkish Airlines in-flight entertainment system built on the IE6.
Technologies: JavaScript, jQuery, HTML5, C#.NET, ASP.NET, MSSQLCE

Software Developer

2009 - 2012
4129 Grey
  • Implemented a quiz game for Microsoft built and adapted to 17 countries with 100 million users.
  • Worked on a real-time online game like the Wheel of Fortune, where an industrial robot controlled the wheel.
  • Built multiple websites and campaign pages for large brands.
Technologies: ASP.NET, C#, MSSQLCE

Cook or Out

It is a website that encourages and helps users cook more at home. It provides the recipe for the chosen restaurant item and a one-click grocery shopping list. It also displays the time and money saved in comparison to eating out.
2005 - 2010

Bachelor's Degree in Computer Engineering

University of Kocaeli - Kocaeli, Turkey


Node.js, React, D3.js, OpenGL, Foursquare API, jQuery


JavaScript, GraphQL, TypeScript, C#, C++, Objective-C, HTML5, C#.NET


ASP.NET, AngularJS, Bootstrap


Elasticsearch, MongoDB, Redis, PostgreSQL, MSSQLCE


iOS, Docker


Browsers, API Design, Apollo Server, Software Architecture, State Machines, Cordova

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