Bogdan Sikora, Developer in Prague, Czech Republic
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Bogdan Sikora

Verified Expert  in Engineering

Web Accessibility Developer

Prague, Czech Republic

Toptal member since November 23, 2020

Expertise
JavaScriptTypeScriptReact.jsNext.jsGame DevelopmentNode.jsPythonReduxFirebaseVercelCSSUnixLinuxDocker
Bio

Bogdan is the CTO of AccessTime, a web accessibility company dedicated to making the digital world more inclusive. As an IAAP-certified expert and full-stack engineer with over a decade of experience, he specializes in building accessible, high-performance websites and applications, CI/CD automation, and seamless integrations. With a passion for accessibility and performance, Bogdan helps businesses compete and grow by crafting intelligent, scalable, and user-friendly solutions.

Portfolio

AccessTime
A11Y, Node.js, TypeScript
Self-employed
Firebase, Firebase Cloud Functions, Cloud Firestore, A11Y, Django, Node.js...
Webscope
REST APIs, APIs, Front-end, GraphQL, HTML, CSS, Cloud Firestore, Firebase...

Experience

  • HTML - 8 years
  • Web Accessibility - 8 years
  • JavaScript - 8 years
  • React - 5 years
  • TypeScript - 5 years
  • Node.js - 4 years
  • Next.js - 4 years
  • Python - 3 years

Availability

Part-time

Preferred Environment

Next.js, React, TypeScript, Node.js, Web Accessibility, A11Y, WCAG, WCAG 2

The most amazing...

...thing I've developed is a platform that enabled users/companies to ensure their application license compliance.

Work Experience

Chief Technology Officer

2024 - PRESENT
AccessTime
  • Led the development of a scalable web accessibility auditing system, optimizing issue detection and reporting for clients across industries.
  • Conducted accessibility audits for enterprise clients, identifying and remediating hundreds of WCAG violations to enhance digital inclusivity.
  • Developed training programs for in-house developer teams, ensuring compliance with WCAG 2.2 and best practices in web accessibility.
  • Advised startups and enterprises on digital accessibility strategies, improving compliance and user experience.
Technologies: A11Y, Node.js, TypeScript

Software Engineer (Freelance)

2020 - PRESENT
Self-employed
  • Oversaw the development of the project's application.
  • Planned project goals and features based on business needs.
  • Acted as a development lead for an online marketplace application.
  • Built a Contentful-powered Next.js page focusing on performance and A11Y, a fully static client-side application.
  • Acted as a full-stack engineer of a serverless Shopify-powered Next.js application.
  • Created a GPT-2 dashboard web application with the Next.js-based front end and the Django back end.
  • Developed a custom serverless solution for image transformations, scaling, and serving.
Technologies: Firebase, Firebase Cloud Functions, Cloud Firestore, A11Y, Django, Node.js, MapKit, PostgreSQL, Serverless, Contentful, React Apollo, GraphQL, HTML, CSS, Styled-components, Tailwind CSS, Next.js, TypeScript, JavaScript, PixiJS, Phaser.io, Vercel, Amazon S3 (AWS S3), Shopify API, Stripe API

Full-stack Engineer

2019 - 2020
Webscope
  • Created a serverless continuous integration (CI) tool for managing dependency tree license validity.
  • Integrated a source control API and serverless architecture.
  • Developed a Python open-source tool for verifying license compliance.
Technologies: REST APIs, APIs, Front-end, GraphQL, HTML, CSS, Cloud Firestore, Firebase, Vercel, AWS Lambda, Node.js, Docker, AWS CodeBuild, Amazon S3 (AWS S3), GitLab, GitHub API, Continuous Integration (CI), Python, Next.js, Styled-components, React, TypeScript, JavaScript, Responsive Web Apps, Responsive UI, Django, Serverless

Front-end and Game Engineer

2017 - 2019
24I Media (formerly Mautilus)
  • Designed and built a leading Smart TV gaming platform with millions of user clicks per day.
  • Developed small game projects and a shared library.
  • Created and maintained a CI/CD pipeline that ensured smooth deployment and quality.
Technologies: Amazon Web Services (AWS), DevOps, Front-end, HTML, CSS, Sass, Phaser.io, CI/CD Pipelines, TypeScript, Smart TV, PixiJS, 2D Games, JavaScript, Node.js

Front-end Engineer

2017 - 2019
24I Media (formerly Mautilus)
  • Developed various React applications running mainly on different Smart TV platforms.
  • Developed and maintained widely used Smart TV applications and ensured their compatibility across devices.
  • Created and maintained a CI/CD pipeline that ensured smooth deployment and quality.
Technologies: Front-end, GraphQL, DevOps, Sass, CSS, HTML, CI/CD Pipelines, Docker, Redux, React, 2D Games, Smart TV, TypeScript, JavaScript, SCSS, Node.js

Quality Engineer

2015 - 2017
Red Hat, EMEA
  • Ensured proper quality and compatibility of Tomcat and Apache httpd applications on several platforms like Linux, Windows, and Sun.
  • Developed and maintained an internal automation tool written in Java.
  • Ensured quality of an httpd load balancer migration to EAP and Java.
Technologies: Unix, Linux, Bash, Python, Quality Assurance (QA), Docker, Java

Experience

GPT-2 Dashboard

A Next.js-based front end with a simple minimalist design with micro-interactions written in TypeScript and a Jest and React testing library for testing. There is a back end powered by the Python framework Django and Docker. I completed this as one man project.

NomadStation

A web application for finding, reviewing, and adding nice places to work from around the world. It is Next.js-based, with Firebase under the hood, and powered by Algolia and Apple Maps. With the proof of concept deployed, it's currently being reworked.

License.sh Tool

https://github.com/webscopeio/license.sh
A Python-based tool to create a dependency tree that checks for license compliance. Supported dependency providers: Pipenv, Maven, Yarn, and npm. This is an open-source tool used in the License.sh application.

TV Games

http://tvgam.es/
A leading Smart TV game platform available on almost every type of platform, from Samsung Tizen OS to the hybrid broadcast broadband TV (HbbTV). The platform boasts more than 20 million users/month. The entire game lifecycle from idea to a real product, as well as most of the libraries, was developed in-house.

Shopify Powered Store Front

This is a Next.js full-stack application for an eCommerce product. Users can use this application to log in to their order, select the product they want to keep, and provide comprehensive feedback for the products.

Design System

Handled the maintenance and updates of a React-based design system for a large startup. I was a front-end developer researching and configuring mono-repo and CI/CD pipelines and debugging and fixing issues in the codebase.

AccessTime

https://accesstime.co
AccessTime provides accessibility audits, consulting, and training to help businesses create inclusive websites. We identify and fix accessibility issues, offer guidance for in-house developers, and provide subscription-based audits for ongoing compliance. Our goal is to raise awareness and improve web accessibility standards.

Certifications

JULY 2024 - AUGUST 2027

IAAP Web Accessibility Specialist (WAS)

International Association of Accessibility Professionals (IAAP)

MARCH 2017 - MARCH 2020

Red Hat Certified System Administrator

Red Hat

Skills

Libraries/APIs

React, Node.js, GitHub API, REST APIs, Shopify API, Stripe API

Tools

AWS CodeBuild, React Apollo, Prisma, GitLab

Languages

JavaScript, TypeScript, HTML, Python, Bash, CSS, Sass, GraphQL, SCSS, Java

Frameworks

Next.js, Redux, Phaser.io, PixiJS, Django, Jest, MapKit, Serverless Framework, Tailwind CSS

Paradigms

Responsive Web Design (RWD), DevOps, Continuous Integration (CI), Continuous Delivery (CD), Unit Testing, Serverless Architecture

Platforms

Vercel, Firebase, Unix, Linux, Docker, AWS Lambda, Amazon Web Services (AWS), Algolia, Contentful

Storage

Amazon S3 (AWS S3), Cloud Firestore, PostgreSQL, MongoDB

Other

Web Accessibility, WCAG, 2D Games, WCAG 2, Quality Assurance (QA), Smart TV, CI/CD Pipelines, HbbTV, Front-end, APIs, Generative Pre-trained Transformer 2 (GPT-2), Firebase Cloud Functions, A11Y, Styled-components, Storybook, Maps, Responsive Web Apps, Responsive UI, Google Cloud Functions, User Interface (UI), Serverless, Monorepos, Accessibility Testing

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