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Hey, I'm Jacob Herper

Lead Software Engineer from the UK

As a passionate front-end developer, I create amazing websites and web apps to make the internet a better place. I am an advocate for web performance and accessibility as well as a JAMstack enthusiast with experience in serverless technologies.

I am √1,024 years old and have been a web developer for as long as I can think. The technologies I work with are JavaScript, HTML and CSS with a focus on the frameworks React.js, Gatsby, Next.js, Node and Express. I use code not only to do my day-to-day job, but also to solve everyday problems I come across.

When I am not writing code I love to spend time with my wife and five-year-old daughter at home in England or travelling around the world. We are quite a multi-cultural family with me having grown up in Germany 🇩🇪 and my wife being from Mexico 🇲🇽, which is why we raise our daughter trilingual. I myself speak five languages (some better than others). Furthermore I enjoy cooking fresh food when I come home after a long day at the office.

Podcasts I enjoy

  • JS Party
  • The Changelog
  • ShopTalk
  • Darknet Diaries
  • Swindled
  • Command-Line Heroes
  • Business Wars
  • How I Built This


Holland & Barrett

Lead Software Engineer

Holland & Barrett

Aug 2020 — present

Technologies: TypeScript, React, Next.js, XState, Redux, GraphQL, Rest APIs, React Query, Jest, Cypress, Playwright, Turborepo

  • Joined Holland & Barrett as a senior front-end software engineer during a digital transformation journey in the cross-functional order management squad
  • Single-handedly developed several front-end applications to manage customer orders and product subscriptions for customer service teams and customers self-serve capability
  • Integrated front-end applications with back-end microservices (mostly RESTful APIs, but also GraphQL)
  • Transitioned to a new squad to focus on contact centre solutions, growing the team from scratch by hiring and onboarding six engineers, and a product manager
  • Successfully implemented a one-stop solution tool, reducing AHT by 60%, cutting costs up to 70%, and significantly enhancing efficiency for customer service agents
  • Demised multiple third-party enterprise solutions, saving the company £1m+ p.a.
  • Promoted to Lead Engineer to spearhead the development of innovative solutions, including a meeting booking solution and custom video conferencing tool
Dennis Publishing

Senior Front-End Engineer

Dennis Publishing

Oct 2019 — Aug 2020

Technologies: JavaScript, ES6, React, GraphQL, Sass, Node.js, Express, Webpack, Apollo

  • Joined as a Senior Front-End Engineer during the re-platforming of their online publishing platform from a Drupal monolith to microservices and React-based front-end applications
  • Conducted a comprehensive code audit of an external agency's work, addressing issues such as N+1 problem in GraphQL by implementing the dataloader pattern
  • Prioritised and resolved major accessibility issues, collaborating with the product lead to enhance the overall code quality and establish best practices
  • Implemented Google AMP across the application framework, resulting in a 38% improvement in pagespeed insights score and the elimination of layout shifts for enhanced SERP rankings
  • Developed in-house advertising platform, leading to an 8% increase in advertising revenue across all websites
  • Responded to a staff redundancy announcement by offering resignation to safeguard team members on visa sponsorships and ensure their positions

Front-End Web Developer


Jan 2019 — Oct 2019

Technologies: TypeScript, React, Gatsby, Next.js, GraphQL, Rest APIs, Styled-Components

  • Joined as first JavaScript developer to lead the move away from WordPress-based monolithic architectures to more robust and modern React-based systems
  • Developed React web applications using TypeScript, Next.js, Gatsby, GraphQL and Styled-Components with global state management through Context API
  • Worked with WordPress as a headless CMS using GraphQL and REST APIs
  • Developed B2B web applications for several Fortune 500 clients using vanilla JavaScript (ES6) and React
  • Worked on legacy projects using ES5 JavaScript syntax with Gulp as a task runner
Creativ Agency

Founder & Director of Engineering

Creativ Agency

May 2018 — Dec 2019

Technologies: JavaScript, PHP, Sass, React, Angular, Gatsby, WordPress, Drupal

  • Development of web applications for small and medium-sized businesses using JavaScript, React, PHP, Sass, HTML5, WordPress, Drupal and different e-commerce solutions
  • Specialised in bespoke client solutions for London-based startups
  • Design of digital assets and print products
  • Management of freelance and contract engineers for international projects
  • Search engine optimisation and search engine marketing
The Specialist Works

Front-End Developer

The Specialist Works

Dec 2017 — Jan 2019

Technologies: JavaScript, PHP, React, WordPress, jQuery, Rest APIs, Sass

  • Tech lead in design and development of new website following brand guidelines based on WordPress, PHP, HTML5, CSS and JavaScript
  • Orchestrating web development work between London and Atlanta offices
  • Collaborating with teams in Beijing, Dublin, New York and Bonn offices to develop custom experiences for clients across the world
  • Development of a web application for a contender energy provider in collaboration with TSW Creative for critical campaign launch under time pressure
  • DevOps tasks monitoring and maintaining Apache server infrastructure and DNS
  • Development of PWA (React) for an event with 250+ attendees
  • Collaborated with internal creative agency to deliver assets for pitches

Co-Founder & CTO


Apr 2014 — Oct 2021

Technologies: React, TypeScript, Next.js, Node.js, Express, Sass, Angular, MongoDB

  • Built a web app to revolutionise the real estate sector in Germany
  • Developed Immovato from the first concept to release of MVP
  • Managed two developers (front-end and back-end) in the development of our application, initially based on Angular (JavaScript) and Laravel (PHP)
  • Moved tech stack to MERN (MongoDB, Express.js, React, Node.js) for an improved performance and DX
ASA Europe

Group Creative Director

ASA Europe

Jun 2008 — Oct 2014

Technologies: PHP, JavaScript, HTML, CSS, MySQL, Sass

  • Started working for ASA as a web designer and developer during final years of college, building and maintaining e-commerce websites and product landing pages
  • First insights into day-to-day operations of e-commerce business (B2B and B2C)
  • Design and conception of new products, packaging, brochures, advertising material
  • Design and execution of international trade shows and B2B events
  • Launch of UK branch of ASA Europe in Chelmsford, Essex
  • Market research and legal compliance analysis for the trade of tobacco products in the United Kingdom, meetings with UK Trade & Investment and HMRC to explore importing of restricted goods
  • Built retail business to become highest-grossing of its kind in the UK within 12 months


I am mostly self-taught, but here are some of the most relevant certifications I have achieved:

University of Helsinki

Full-Stack Open

Sep 2019

University of Helsinki

Course Contents: React, JavaScript, Node.js, Express, GraphQL, Cypress, Jest

Harvard University


Jun 2020

Harvard University

Course Contents: C, Python, SQL, Algorithms, Data Structures

Interested in what I have to offer?

I am happy to have a chat about relevant projects to work on. Below you find a download link for my up-to-date CV. Are you a recruiter? Have a read through my recruiters page, where I explain what I am looking for in a job. This page is designed to save both of us time.

If you are interested in working with me, please contact me via the contact form. I do not appreciate cold calls and will not answer calls from numbers I do not recognise.