Jan Elznic

Fullstack Software Engineer

Always listen to experts. The'll tell you
what can't be done and why. Then do it.
(Robert A. Heinlein)

About me

My name is Jan Elznic, I am 37 years old and I am doing software development for web and mobile platforms. My specialization is web frontend applications (HTML5, CSS3 and JavaScript). My first page I wrote in 1998. Ten years later (2008), I officially started my own business. I worked for several years as a freelancer, tried a full-time job for Czech and also some other European, American or Australian startups, medium-sized companies and big international corporations. More about my professional career you can learn from my resumé (CV).

I'm also interested in in UX, native mobile app development for Android + iOS platforms and artificial intelligence (AI).
I'm a fan of games of all kinds, Linux and Open Source - a few of my contributions to the world of open source can be found on my GitHub.

My favourite activities at spare time: Horse riding, cycling, skiing, water sports, skiing, travelling, reading, blogging and I like to visit the theatre, cinema or a festival.

Résumé (PDF doc)

Portfolio

I have professional experience more than 17 years in IT, 11 years in international environment, 9 years in technology management…

Web frontend
- HTML(5), CSS(3), Less/Sass
- Responsive webdesign
- JavaScript (ECMAScript6), TypeScript
- Frameworks Angular, React + Hooks, Vue
- Mobile applications in React Native a IONIC
- Development for Android a iOS platforms
- Material UI, Twitter Bootstrap, Next.js, …
Backend applications
- Node.js + TypeScript — Express, NestJS
- PHP — nette, Yii, Laravel, Symfony, …
- Go — Temporal.io
- Python, C/C++, Java, bash
- MySQL, PostgreSQL, MongoDB, Neo4j, …
- Security (XSS, CORS, CSRF, SQL inject)
- REST, GraphQL, WebSockets
DevOps + Cloud
- Microsoft Azure, Docker, Kubernetes (AKS)
- Linux servers administration (Debian/Ubuntu, RHEL)
- Networks, TCP/IP, DNS, loadbalancing
- Web servers - Apache2, Nginx
- VPN networks - OpenVPN, PPP(TP)
- Terraform, bash, CI/CD, pipelines
Management
- Building IT corporate strategy
- Managing teams of up to 50 people
- Leadership, Development and Mentoring
- Recruitment of newcomers, Interviews
- Motivational planning - Objectives (KPIs)
- Project planning, Trainings
- Communication with partners, Legislation
Graphics & UX
- Wireframes and prototype design
- Graphic design, CSS animations
- Figma, StoryBook, Miro, Adobe PS, Illustrator, Corel DRAW, SVG
- Usability analysis and User testing, Eye tracking, Heatmaps
- Apple/Google Guidelines, Typography
Analytics, SEO and marketing
- Building a strategy for monetization
- Google Analytics & Webmasters Tools
- Search Engines Optimization (SEO)
- PPC campaigns (AdWords, Sklik)
- CRM, Sales, B2B a B2C marketing
- PR, Media plans and Social networks
- Analytics + data collection (+ GDPR)

References

Some clients from recent years:

Some projects:

Head of Engineering
- Client: MaxInvest a.s.
- Scope: Management, Architecture, Vývoj
- Technologies: React Native, Go, PostgreSQL, Node.js, TypeScript
- Realization: 02/2022–present
https://www.maxinvestapp.eu/
Solution Architect & Principal Engineer
- Client: ElzaSoft Software Development s.r.o.
- Scope: Architecture, Leadership, Strategy
- Technologies: Angular, React, Vue.js, Node.js, TypeScript
- Realization: 12/2019–01/2022
https://elzasoft.cz
Warehouse Management System with robots
- Client: RUR Robotics s.r.o., Alza.cz a.s.
- Scope: FE, BE, Architecture, Teamlead
- Technologies: Angular, TypeScript, Node.js, Express, PostgreSQL, MongoDB
- Realization: 2019
Application is not public
Red Hat Insights
- Client: Red Hat Czech s.r.o.
- Scope: Frontend
- Technologies: React, JavaScript
- Realization: 2019
https://www.redhat.com/en/about/vide…
archTIS - Kojensi
- Client: BSTTech Consulting Pty Ltd
- Scope: Frontend
- Technologies: Angular 6, TypeScript
- Realization: 2018
https://www.archtis.com/products/
Cemex track & trace web app
- Client: CEMEX / Neoris s.r.o.
- Scope: Frontend, Responsive template
- Technologies: React, Angular 2
- Realization: 2017
Application is not public
Multiplatform HTML5 casino games
- Client: Trusteca s.r.o.
- Scope: Android, iOS, web
- Technologies: Canvas/WebGL, JavaScript
- Realization: 2016
Application is not public
O2 portal
- Client: O2 Czech Republic a.s.
- Scope: Frontend, Responsive template
- Technologies: Java, Liferay, HTML5, CSS3, JS
- Realization: 2016
https://o2.cz
Seznam skokanů by Seznam.cz
- Client: Seznam.cz, a.s.
- Scope: Backend, Frontend
- Technologies: PHP, HTML, CSS, JS
- Realization: -
- Estimation: about 40 hours
http://skokani.seznam.cz