Denis Bosire, Developer in Nairobi, Nairobi County, Kenya
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Denis Bosire

Verified Expert  in Engineering

Front-end and WordPress Developer

Nairobi, Nairobi County, Kenya
Toptal Member Since
August 31, 2021

Denis is an ambitious front-end developer with ten years of experience designing and building interactive user experiences. He has experience with WordPress and React and has managed DevOps from the ground up. Denis has led teams, worked with multiple digital agencies in London, Sheffield, and Nairobi, and has a long list of satisfied clients, from NGOs to small businesses.


JavaScript, React, NGINX, HTML, CSS, WordPress, WordPress API...
Rainmaker Digital
React, PHP 7, CSS, HTML, JavaScript, GitHub, DevOps, Webpack, Webhooks, jQuery...
Lumiform GmbH
WordPress, Elementor, Search Engine Optimization (SEO)...




Preferred Environment

WordPress, PHP 7, HTML5, CSS3, JavaScript, React, WordPress API, WordPress Themes, WordPress Plugins

The most amazing...

...project I've built is iSoko, an eCommerce platform for small businesses, built with WordPress MU and WooCommerce. I did the design, development, and DevOps.

Work Experience

Senior Full-stack Developer

2021 - PRESENT
  • Worked with various industry clients to develop and deliver outstanding web applications.
  • Perfected my DevOps skills by onboarding clients onto different services from AWS, Azure, and DigitalOcean.
  • Oversaw the launch of most of these projects that not only look and feel great but also help my clients' businesses grow.
Technologies: JavaScript, React, NGINX, HTML, CSS, WordPress, WordPress API, WordPress Plugins, WordPress Design, WordPress Themes, WordPress Rescue, Web UX, Web UI, Elementor, REST APIs, LAMP, Software Architecture, Google Tag Manager, SEO Tools, Front-end, Adobe Experience Design (XD), Responsive Web Design (RWD), Plugins, MERN Stack, Web Design, ShipStation, Stripe, WordPress SEO, WordPress Optimization, Shopify, Elegant Themes, Constant Contact API, CRM APIs, XML, Forms, Yoast SEO, User Experience (UX), WP All Import, Wordfence Security, Performance Optimization, Avada, Learning Management Systems (LMS), Page Speed Optimization, ECMAScript (ES6), Zapier, Printful

Front-end Developer

2021 - PRESENT
Rainmaker Digital
  • Designed and developed new WordPress themes and plugins to match client needs.
  • Served as technical support for existing clients while reporting to client service.
  • Collaborated with a distributed team which required constant communication.
Technologies: React, PHP 7, CSS, HTML, JavaScript, GitHub, DevOps, Webpack, Webhooks, jQuery, Figma, WordPress, PHP, Elementor, Google Tag Manager, SEO Tools, Payment APIs, Front-end, Adobe Experience Design (XD), Responsive Web Design (RWD), WPML, MERN Stack, Web Design, Responsive Web Apps, Membership Sites, ShipStation, Stripe, WordPress SEO, WordPress Optimization, Elegant Themes, Leadership, Yoast SEO, User Experience (UX), Performance Optimization, Ninja Forms, Learning Management Systems (LMS), WordPress LMS, Page Speed Optimization, ECMAScript (ES6), Zapier

Senior WordPress Developer

2023 - 2023
Lumiform GmbH
  • Helped migrate their website from a custom CMS to WordPress by building a WordPress theme, five Elementor add-ons, and three Gutenberg blocks.
  • Tracked and fixed bugs using ClickUp. Also used Slack for team communication and updates.
  • Oversaw a partial launch with the WordPress theme and checklist features built.
Technologies: WordPress, Elementor, Search Engine Optimization (SEO), Adobe Experience Design (XD), Plugins, WPML, MERN Stack, Web Design, Responsive Web Apps, Membership Sites, Stripe, Forms, Wordfence Security, Performance Optimization, Learning Management Systems (LMS)

WordPress Developer

2023 - 2023
fourth dimension technologies Inc.
  • Redesigned the front-end site and optimized performance.
  • Audited queries to determine where we could improve.
  • Got a page speed score from a low 25 to 82 and accessibility and SEO from 30 to 99.
Technologies: WordPress, WooCommerce, Payment Processing, Websites, Performance, Software Architecture, Accessibility, Adobe Experience Design (XD), MERN Stack, Web Design, Responsive Web Apps, Stripe, WordPress SEO, Leadership, WP Engine, Learning Management Systems (LMS), WordPress LMS, Zapier

WordPress Developer

2022 - 2022
Innersource Unlimited, Ltd
  • Designed and developed an e-learning platform for the Eden method and migrated from a legacy system to LearnDash.
  • Used Jira to track and record bugs, GitHub for versioning, and DigitalOcean.
  • Launched an e-learning platform with over 40,000 users.
Technologies: WordPress, LearnDash, ActiveCampaign, Content Marketing Platforms, Beaver Builder, WordPress API, WordPress Themes, WordPress Plugins, Elementor, jQuery, Google Tag Manager, Adobe Experience Design (XD), Membership Sites, ShipStation, Yoast SEO, User Experience (UX), Learning Management Systems (LMS), Zapier

WooCommerce Developer

2021 - 2021
Jasper Software, Inc
  • Helped build an eCommerce platform for the Master's Tournament using WordPress and eCommerce.
  • Tracked and fixed bugs using Trello. Used Slack for communication and to keep track of things.
  • Helped re-align the development process by using Git pipelines.
Technologies: CSS, JavaScript, PHP, WooCommerce, WordPress, jQuery, Figma, Google Tag Manager, Payment APIs, Accessibility, WordPress SEO, SQL

Senior Full-stack Developer

2021 - 2021
  • Developed a SaaS for a client on a very limited time schedule. It was a multi-tenant app that enabled users to build portfolio websites.
  • Integrated payment platforms, including Stripe and Mobile Money (M-Pesa).
  • Created over 10 templates with React used to onboard clients.
  • Managed all DevOps from the ground up and wrote technical documentation.
  • Managed a team that included five developers, a designer, and a project manager.
Technologies: React, DevOps, GitOps, Agile Project Management, HTML5, CSS, PHP 7, SaaS, PHP, APIs, REST APIs, CSS3 Animation, Plugins, Membership Sites, Stripe, Leadership, Yoast SEO, Content Delivery Networks (CDN)

Full-stack Developer

2019 - 2019
Make Do
  • Built native Gutenberg blocks, using React and then using ACF.
  • Tracked and fixed bugs on projects using Jira and Bitbucket.
  • Communicated in a variety of ways with a distributed team to stay on top of the project.
Technologies: React, WordPress, PHP 7, CSS, SaaS, HTML5, Testing, CSS3 Animation, Responsive Web Design (RWD), Plugins, Healthcare IT, Content Delivery Networks (CDN)

Senior Full-stack Developer

2016 - 2019
Pixel Tribe
  • Built 25+ custom WordPress themes and plugins, all available for free on with over 600,000 active users.
  • Built web apps and 50+ responsive websites for a variety of clients and agencies from design to development.
  • Handled tech support, maintenance, upgrades, and DevOps.
  • Brought in and maintained new clients through strategic business development approaches.
Technologies: JavaScript, React, WordPress, REST, NPM, SaaS, WooCommerce, Easy Digital Downloads, CSS3 Animation, Leadership, SQL

Web Developer

2013 - 2015
Agency Africa
  • Developed an app for hotel bookings that integrates with their offline services.
  • Conducted SEO and digital marketing for hotels and the hospitality industry.
  • Developed and managed web apps for clients around the country.
  • Customized and maintained OSS to the client's specifications and needs.
Technologies: SEO Audits, WordPress, WordPress API, Healthcare IT, SQL

Intern Front-end Developer

2011 - 2011
Magpie Agency
  • Worked as the 1st tech hire in the company and managed everything pertaining to code.
  • Developed web applications and websites for the hospitality industry and honed my project management skills in the process.
  • Interacted with clients for strategic meetings and planning sessions.
Technologies: WordPress, Photoshop 7, HTML, CSS

Company Website
Built the company website for Incentro. This was the 1st headless project I developed. It was built on Gatsby, CSS3, and HTML5. The back end still runs on WordPress and WordPress REST API. We later changed this to WPGraphQL.

WordPress Themes and Plugins
A WordPress themes and plugins shop specializing in real estate and portfolio themes, where ee have 17 free WordPress themes on the repository and five free plugins. Together with the free articles, we also have premium plugins that add more features to these themes.

WordPress Portfolio Themes
WordPress themes for photographers, designers, and artists to display their work and I built multiple themes that can be customized, as well as a Gutenberg portfolio block with a gallery, portfolio listing, and other blocks.

Lysa Magazine Africa
Built an online fashion magazine for the African market where the responsive SEO website was based on WordPress with marketing integration, such as Mailchimp and social sharing. At one point, it was the most popular fashion blog in Kenya.

A WordPress and WooCommerce-based web app that allows small businesses to set up eCommerce sites in minutes with no technical knowledge or steps included. The sites run on WordPress Multisite hosted on AWS with load balancing and CDN.

The Bar Method Gym
Build a franchise site for The Bar Method, a popular gym franchise in the States. I used Gutenberg (React) to build a full site and edit themes and plugins, including custom blocks and block patterns. The site also required a custom form and mapping Gutenberg block that fetches and sends data to an external service via REST API.
2008 - 2011

Bachelor of Science Degree in Pharmacology

University Of Leeds - Leeds, UK


WordPress API, Stripe, jQuery, React, REST APIs, Constant Contact API, Flexbox


Advanced Custom Fields (ACF), Adobe Experience Design (XD), Zapier, Gutenberg Editor, Git, GitLab, GitHub, LearnDash, GravityView, Google Analytics, WPML, ShipStation, WP All Import, Ninja Forms, Photoshop 7, NPM, Webpack, Mailchimp, NGINX, Figma, Printful


HTML, CSS, PHP 7, HTML5, CSS3, PHP, XML, ECMAScript (ES6), JavaScript, SQL


Mobile Web Design, Responsive Web Design (RWD), Web UX Design, Search Engine Optimization (SEO), REST, Testing, DevOps, Agile Project Management


WordPress, WooCommerce, cPanel, DigitalOcean, WordPress Theme Design, Shopify, HubSpot, WordPress VIP, LAMP

Industry Expertise

Web Design


MySQL, WP Engine




WordPress Themes, WordPress Plugins, PSD to HTML, PSD to PHP, Web Development, Web Template Design, Responsiveness, Responsive Design, eCommerce, WordPress Design, Elementor, PSD to WordPress, Software Architecture, Front-end, Plugins, MERN Stack, Responsive Web Apps, News, Membership Sites, WordPress SEO, WordPress Optimization, Elegant Themes, CRM APIs, Forms, Yoast SEO, Performance Optimization, Cloudflare, Online Payments, Learning Management Systems (LMS), WordPress LMS, Page Speed Optimization, Content Delivery Networks (CDN), Analytics, APIs, WooCommerce Subscriptions 2, MemberPress, Gravity Forms, Google Tag Manager, SEO Tools, Payment APIs, Accessibility, CSS3 Animation, Healthcare IT, User Interface (UI), Pop-ups, Leadership, User Experience (UX), Wordfence Security, CI/CD Pipelines, Avada, SEO Audits, SaaS, GitOps, Gatsby, PayPal, Easy Digital Downloads, ActiveCampaign, Beaver Builder, WordPress Rescue, Webhooks, Web UX, Web UI, Content Marketing Platforms, Payment Processing, Websites, Performance

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