Roman is available for hire

Roman Predein

Verified Expert in Engineering

Software Developer

Location

Barcelona, Spain

Toptal Member Since

October 16, 2020

Roman is a full-stack developer with a primary focus on the front end (React and Angular). He has around six years of software development experience, and he has worked with different technologies in both startups and big multinational firms. Roman believes that good communication and transparency are key for efficient and productive work.

Coding Software Development Front-end React JavaScript TypeScript Full-stack Linux Agile CSS JSON Redux Unit Testing Node.js Sass

Portfolio

Apiumhub

Scrum, Agile, PHP, Java, TypeScript, JavaScript, CSS, JSON, Front-end, HTML...

Apiumhub

C#.NET, Java, PHP, Node.js, Angular, React, JavaScript, CSS, JSON, Front-end...

Polymer Char

.NET

Experience

React - 6 years IntelliJ IDEA - 5 years JavaScript - 5 years Unit Testing - 4 years Redux - 4 years TypeScript - 3 years Node.js - 3 years Angular - 3 years

Availability

Part-time

Preferred Environment

PHP, Node.js, Angular, Redux, React, TypeScript, JavaScript, JetBrains Rider, IntelliJ IDEA, Linux, CSS, JSON, Front-end, HTML

The most amazing...

...thing I've developed is Agora Images, a social network and marketplace for photographers. High traffic, microservices, and pixel-perfect UI were key features.

Work Experience

Full-stack Developer

2014 - 2020

Apiumhub

Worked on more than 10 different projects in different technologies.
Optimized workflows and improved efficiency and transparency of the team using Agile and Scrum.
Launched global products with millions of active users.

Technologies: Scrum, Agile, PHP, Java, TypeScript, JavaScript, CSS, JSON, Front-end, HTML, Full-stack, Tailwind CSS, Next.js

Full-stack Developer

2014 - 2020

Apiumhub

Contributed to around 10 different projects as a full-stack developer.
Developed new functionalities, regardless of the coding language.
Worked with Agile methodologies: sprints, estimations, backlog, retrospectives, etc.

Technologies: C#.NET, Java, PHP, Node.js, Angular, React, JavaScript, CSS, JSON, Front-end, HTML

Junior Software Developer

2013 - 2014

Polymer Char

Developed an internal CLM tool for Windows desktop for the company.
Worked on both the development of new functionality and maintenance and performed bug fixes.
Migrated from the previous system to the newly developed one.

Technologies: .NET

Experience

Nestlé Internal Portal

An internal tool used by Nestlé workers.

Hosted on Azure, the back end is C#, and the front end a React-Redux SPA.

The portal manages different integrations with many other external tools and united all needed information under a single UI. It simplified and sped up the overall processes.

Agora Images

https://www.agoraimages.com/

A social network for photographers.

Besides usual functionality for such applications, like chat, and image upload. The key features included contests with monetary prices and the ability to buy anyone's pictures if they were on sale.

Talentry

https://www.talentry.com/

A recruitment/marketing tool. It acts as a social network for recruitment when you have targets and rewards for getting new people to join different teams or projects.

Technologies used where PHP for the back end, and Angular for the front end.

Plannear

An aggregator platform to provide a geolocated list of events and activities to take place in the biggest cities around the world. Offering the option to plan trips and book or buy tickets.

The project was done in Scala/Play with MongoDB.

CL3VER

A platform for real-time cloud rendering. Special focus on the development of new functionality regarding the creation and management of 3D presentations.

Microservices architecture was used to allow different teams to work in the best suiting technology stack.

Supporton

https://www.f6s.com/supporton

Proof of concept for an IoT concept. Development of a platform for monitoring real-time data sent from different censors placed in vehicles, to detect anomalies and possible failures or crashes.

All data, alerts, thresholds, etc, are easily visible on a map with intuitive UI.iot

CARNOVO

https://carnovo.com/

Vehicle comparison platform. Allowed integration with car dealers, to provide prices, offers, and funnel clients to the best deals available for a particular car and location.

Integration with third-party services for package simulations, vehicle catalogs, etc.

DEXMA

https://www.dexma.com/

Development and release of different applications inside DEXMA marketplace,

Used for real-time data processing from electric and water consumption from a household, for alerts and overall statistics display and report generation.

Education

2009 - 2014

Master's Degree in Telecommunications

Universitat Politecnica de Valencia - Valencia, Spain

Skills

Libraries/APIs

React, Node.js

Tools

IntelliJ IDEA, JetBrains Rider

Languages

JavaScript, TypeScript, CSS, Sass, HTML, PHP, Java, C#.NET, Scala

Frameworks

Redux, Angular, Tailwind CSS, .NET, Symfony, Next.js

Storage

JSON, Amazon DynamoDB, MongoDB, MySQL

Paradigms

Unit Testing, Agile, Microservices, Scrum

Platforms

Linux, Docker, Amazon Web Services (AWS)

Other

Coding, Software Development, Front-end, Full-stack, IoT Security, eCommerce

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