Tomas Livora
Software Developer
Location
Prague, Czech Republic
Toptal Member Since
March 21, 2019
Since 2013, Tomas has been making a living as a full-stack developer working with large corporations as well as early-stage startups. Highlights from his career include working for Red Hat on its core JBoss products, co-founding his own company, Lumeer.io and later joining another startup, Mapotic.com, as a front-end specialist. He specializes in building modern single-page applications with a strong emphasis on a beautiful UI and a great UX.
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Snappy Kraken
Laravel Mix, Vue-router, TypeScript, Laravel, PHP, WordPress, Sass, SCSS, CSS...
Timbergrove
Styled-components, React, Architecture, Node.js, Front-end, Sass, CSS...
Mapotic
Cypress, HTML, NPM, CSS, JavaScript, SCSS, NgRx, E2E Testing, Angular Material...
Experience
HTML - 14 yearsCSS - 14 yearsJava - 8 yearsMongoDB - 4 yearsRxJS - 4 yearsAngular - 4 yearsJavaScript - 4 yearsVue - 1 yearLocation
Availability
Part-time
Preferred Environment
GitHub, WebStorm, Linux
The most amazing...
...project I've worked on is Lumeer: a flexible information system that gives users the same freedom as spreadsheets but enables more advanced data manipulation.
Work Experience
2019 - PRESENT
Full-stack Developer
Snappy Kraken
- Maintained a SaaS product used by many users and several enterprise clients.
- Developed new features and fixed bugs in the existing multipage application based on WordPress and Vue.js.
- Developed a single-page application based on Laravel and Vue.js as a side project.
- Optimized the previous version of the company's web page by increasing its Google Lighthouse score.
- Collaborated with the design department to create a newly redesigned web page.
Technologies: Laravel Mix, Vue-router, TypeScript, Laravel, PHP, WordPress, Sass, SCSS, CSS, HTML, Vue CLI, Vuex, Vue, JavaScript
2020 - 2020
Lead Front-end Developer
Timbergrove
- Oversaw and participated in the development of multiple complex single-page applications.
- Designed and improved the architecture of multiple applications, refactored essential legacy code, and introduced a state management library.
- Led a complete redesign of an existing application.
- Put in place useful tools and CI processes to improve the developer experience and eliminate preventable bugs.
- Reviewed regularly the code of four front-end developers, taught them best practices, and helped them resolve tricky issues.
Technologies: Styled-components, React, Architecture, Node.js, Front-end, Sass, CSS, Clean Code, REST, Angular CLI, Sentry, Amazon S3 (AWS S3), GitHub Actions, Storybook, RxJS, NgRx, SCSS, JavaScript, TypeScript, Angular Material, Angular
2018 - 2019
Front-end Developer
Mapotic
- Led the process of making the application more reactive using a state management library.
- Contributed to the redesign of the application's UI.
- Proposed and executed some crucial refactorings of the legacy code that made the application more stable.
- Covered basic use cases with a set of E2E tests using Cypress.
- Advocated the use of GitFlow to speed up the development process and deployment cycle.
Technologies: Cypress, HTML, NPM, CSS, JavaScript, SCSS, NgRx, E2E Testing, Angular Material, Angular CLI, Mapbox GL, Storybook, Sentry, Front-end, SaaS, RxJS, Sass, LeafletJS, TypeScript, Angular
2017 - 2019
Co-founder
Lumeer
- Designed a reactive front-end architecture to support switching between various visual interpretations of data and enable collaboration between multiple users.
- Switched the back end to a three-layer architecture to support growing the application's size with minimal technical debt.
- Led a team of up to five developers, implemented frequent code reviews, and advocated industry-best practices.
- Set up an E2E test suite and covered important parts of the application by automated tests.
- Reported and fixed bugs in various libraries our product depended on.
- Contributed to business planning and strategic decision-making.
Technologies: Architecture, NPM, API Testing, Java EE, CSS, JavaScript, Clean Code, REST, Angular CLI, SCSS, NgRx, Cypress, Apache Maven, E2E Testing, Sentry, Auth0, CircleCI, Travis CI, DigitalOcean, WildFly, Full-stack, Front-end, SaaS, Bootstrap, RxJS, Sass, MongoDB, Java, TypeScript, Angular
2013 - 2017
Quality Engineer
Red Hat
- Tested JBoss Business Process Management (BPM) Suite and JBoss Business Rules Management System (BRMS) products.
- Ran automated test suites and analyzed test results.
- Tested installers, the BPM engine, web application UIs, remote APIs, and performance.
- Reported around 200 complex bugs and verified much more.
- Created three large automated test suites from scratch.
- Made over 30 voluntary code contributions to tested projects.
Technologies: API Testing, REST, JBoss AS, JPA, Apache Maven, WildFly, Java EE, Java
Experience
Lumeer
https://www.lumeer.io/As a CTO, I was responsible for the development of this visual project and team management tool.
I led a team of up to five developers, designed the architecture of the system, and implemented a large part of it.
The back end was based on Java EE, ran in a WildFly application server, and used MongoDB as the primary data storage. The front end was based on Angular; it was made fully reactive using NgRx state management library and used many other libraries (such as Mapbox GL, Plotly, Frappe Gantt, etc.) to display various visual representations of data. The application ran on multiple nodes in DigitalOcean cloud and used Auth0 for user authentication.
The design decisions I made early on enabled us, for example, to easily implement real-time user collaboration using Pusher in later stages.
I led a team of up to five developers, designed the architecture of the system, and implemented a large part of it.
The back end was based on Java EE, ran in a WildFly application server, and used MongoDB as the primary data storage. The front end was based on Angular; it was made fully reactive using NgRx state management library and used many other libraries (such as Mapbox GL, Plotly, Frappe Gantt, etc.) to display various visual representations of data. The application ran on multiple nodes in DigitalOcean cloud and used Auth0 for user authentication.
The design decisions I made early on enabled us, for example, to easily implement real-time user collaboration using Pusher in later stages.
Mapotic
https://www.mapotic.com/I gradually became the main front-end developer responsible for this map social network with over 50 000 monthly active users. The application was based on the latest Angular and used Leaflet to render a map. I introduced a new Redux-like architecture (based on NgRx) which contributed to smooth UX and made the application more stable.
SilverWare
https://github.com/SilverThings/SilverWareI contributed to this microservice platform while working on my master's thesis. I integrated various fault-tolerance mechanisms (based on Hystrix) which can be easily configured by Java annotations. In order to enable this, I also had to make significant changes in the SilverWare core.
PSI Coupon Dashboard
I built from scratch a web administration for an iOS app based on Firebase. The web application was built using Angular, NgRx, and Material Dashboard Pro theme.
HA Blueprints
I built a web application which enables users to share blueprints of their houses with others. It was built using Angular, NgRx, and Material Dashboard Pro theme. We used Firebase as the database, file storage, and authentication service; various tasks were also automated using cloud functions.
Skills
Languages
JavaScript, HTML, Java, TypeScript, CSS, Sass, SCSS, PHP
Frameworks
Angular, Bootstrap, Cypress, JPA, Angular Material, Redux, Apache Camel, Laravel, Laravel Mix, Hibernate
Libraries/APIs
NgRx, RxJS, Mapbox GL, Vuex, LeafletJS, React, Node.js, Vue
Platforms
Firebase, Java EE, Amazon EC2, Android, WordPress, Amazon Web Services (AWS), Linux, DigitalOcean
Storage
Cloud Firestore, Amazon S3 (AWS S3), JBoss AS, MongoDB
Other
UI Components, API Testing, SaaS, Responsive Design, Front-end, Full-stack, Firebase Cloud Functions, Firebase Hosting, Storybook, GitHub Actions, Styled-components, Vue-router, Cloud, Accelerated Mobile Pages (AMP), User Interface (UI), Real-time Data
Tools
Git, Apache Maven, NPM, Angular CLI, GitHub, WebStorm, JBoss BPM Suite, Vue CLI, Sentry, Auth0, Webpack, Gulp, CircleCI, Travis CI, WildFly
Paradigms
E2E Testing, Reactive Programming, Clean Code, Responsive Web Design (RWD), REST
Education
2014 - 2017
Master's Degree in Informatics
Masaryk University - Brno, Czechia
2015 - 2015
Erasmus+ Exchange Program in Information Technology
University of Oslo - Oslo, Norway
2011 - 2014
Bachelor's Degree in Informatics
Masaryk University - Brno, Czechia
Certifications
OCTOBER 2020 - OCTOBER 2023
AWS Certified Cloud Practitioner
Amazon Web Services
JUNE 2017 - JANUARY 2019
Red Hat Certified Architect: Enterprise Application Development
Red Hat
JUNE 2017 - JANUARY 2021
Red Hat Certificate of Expertise in Business Process Design
Red Hat
FEBRUARY 2017 - JANUARY 2021
Red Hat Certificate of Expertise in Camel Development
Red Hat
OCTOBER 2016 - OCTOBER 2019
Red Hat Certified JBoss Administrator
Red Hat
JULY 2016 - JULY 2019
Red Hat Certificate of Expertise in Developing Fast Cache Applications
Red Hat
MARCH 2016 - JANUARY 2021
Red Hat Certified JBoss Developer
Red Hat
AUGUST 2015 - AUGUST 2018
Red Hat Certificate of Expertise in Persistence
Red Hat