Sven is available for hire

Sven Mijić

Verified Expert in Engineering

Full-stack Developer

Location

Zagreb, Croatia

Toptal Member Since

February 25, 2022

Sven is an experienced full-stack developer with the knowledge of working on both front-end and back-end architectures. He has been enrolled in developing enterprise-level apps for two different central European government bodies, also contributing as a team lead and mentor for junior team members. Sven is proficient in React and .NET and always strives to find the best possible solution for a particular problem.

Front-end Back-end Full-stack Web Development Back-end Development Web Scraping Full-stack Development User Experience (UX)Data Visualization Responsive UI User Interface (UI)UI Components JavaScript Visual Studio Visual Studio Code (VS Code)Fortran

Portfolio

Freelance

APIs, Back-end, C#, C#.NET, CSS, Front-end, Full-stack, HTML, JavaScript, Linux...

Uprise d.o.o.

C#, .NET, JavaScript, React, Full-stack, Front-end, Back-end, Web Development...

Uprise d.o.o

C#, .NET, JavaScript, React, Full-stack, Front-end, Back-end, Web Development...

Experience

JavaScript - 4 years Back-end - 3 years Front-end - 3 years C# - 3 years React - 3 years Web Development - 3 years Full-stack - 3 years .NET - 3 years

Availability

Part-time

Preferred Environment

APIs, SQL, Full-stack Development, JavaScript, React, C#, Front-end, Back-end, .NET, Web Scraping

The most amazing...

...recent impactful solution I built helped the client cut costs and time significantly by automating the old workflow via automated scripts.

Work Experience

Senior Full-stack Developer

2022 - PRESENT

Freelance

Designed the software architecture of the app based on client requirements and managed the deployment environment.
Oversaw troubleshooting of technical and implementation issues to solve practical problems within reasonable timeframes.
Conducted testing of web apps across all major browsers and mobile devices to ensure quality and consistency.

Technologies: APIs, Back-end, C#, C#.NET, CSS, Front-end, Full-stack, HTML, JavaScript, Linux, MacOS, Back-end Development, React, .NET, OpenStreetMap, Mapping, Redux, ASP.NET, ASP.NET Core, Git, Front-end Development, Microsoft SQL Server, Azure Cloud Services, API Integration, Web Scraping, Virtual Machines, DevOps, .NET Core, Responsive Web Apps, Full-stack Development, GitHub, CI/CD Pipelines, Docker, NGINX, RabbitMQ, User Experience (UX), HTML5, Dashboards, Data Visualization, UI Animation, Responsive UI, User Interface (UI), Integration Testing, UI Components, Redux-Saga, Charts, Web Applications, Architecture, Software Architecture, DNS, Algorithms, Privacy, Data Privacy, Databases, Cloud, .NET 6, React Redux, REST APIs, .NET 4, Vue, Google Maps, Microservices, Python 3, Scraping, PyCharm, PIP, RDBMS, Web Dashboards, Flask, Django, Recharts, Webpack, Semantic UI

Team Lead

2021 - 2022

Uprise d.o.o.

Coordinated several team members to develop enterprise-level apps for various European government bodies and multinational organizations.
Led team members on several projects and mentored younger members to adapt to the desired workflow.
Created the company's first-ever way of working documents concerning front- and back-end architecture.

Technologies: C#, .NET, JavaScript, React, Full-stack, Front-end, Back-end, Web Development, Visual Studio, TypeScript, APIs, SQL, HTML, CSS, C#.NET, Content Management Systems (CMS), Redux, PostgreSQL, pgAdmin, Linux, Windows, Visual Studio Code (VS Code), MongoDB, Node.js, Styled-components, ASP.NET, ASP.NET Core, Next.js, Git, D3.js, GraphQL, Amazon S3 (AWS S3), Microsoft SQL Server, Azure Cloud Services, API Integration, Web Scraping, Virtual Machines, DevOps, .NET Core, Responsive Web Apps, React Native, Full-stack Development, GitHub, CI/CD Pipelines, Docker, NGINX, RabbitMQ, Bootstrap, SCSS, Sass, Go, User Experience (UX), HTML5, Dashboards, Data Visualization, Less, UI Animation, Responsive UI, User Interface (UI), Integration Testing, UI Components, Redux-Saga, Express.js, Charts, Amazon Web Services (AWS), Agile, Tailwind CSS, Web Applications, Test-driven Development (TDD), Architecture, Software Architecture, DNS, Algorithms, Privacy, Data Privacy, Firebase, NoSQL, Databases, NestJS, Cloud, Python, Networking, .NET 6, React Redux, REST APIs, .NET 4, Vue, Google Maps, Microservices, Python 3, Kubernetes, Flutter, MySQL, CQRS, Automated Testing, Swagger, Scraping, PyCharm, PIP, RDBMS, Web Dashboards, Flask, Django, Recharts, C++, Azure Cosmos DB, MobX, JavaScript Testing, Behavior-driven Development (BDD), Webpack, Semantic UI, Azure DevOps

Full-stack Developer

2019 - 2021

Uprise d.o.o

Developed enterprise-level full-stack web applications for various European government bodies and multinational organizations.
Supervised and managed time-sensitive content changes, optimizations, bug fixes, and database upgrades.
Handled communication with multiple clients to elevate and maximize the efficiency of projects' schedules and deliverables.

Technologies: C#, .NET, JavaScript, React, Full-stack, Front-end, Back-end, Web Development, Visual Studio, TypeScript, APIs, SQL, HTML, CSS, C#.NET, Content Management Systems (CMS), Redux, PostgreSQL, pgAdmin, Linux, Windows, Visual Studio Code (VS Code), MongoDB, Node.js, Styled-components, ASP.NET, ASP.NET Core, Next.js, Git, D3.js, GraphQL, Amazon S3 (AWS S3), Microsoft SQL Server, Azure, Azure Cloud Services, API Integration, Web Scraping, Virtual Machines, DevOps, .NET Core, Responsive Web Apps, React Native, Full-stack Development, GitHub, CI/CD Pipelines, Docker, NGINX, RabbitMQ, Bootstrap, SCSS, Sass, Go, User Experience (UX), HTML5, Dashboards, Data Visualization, Less, UI Animation, Responsive UI, User Interface (UI), Integration Testing, UI Components, Redux-Saga, Express.js, Charts, Amazon Web Services (AWS), Agile, Tailwind CSS, Web Applications, Test-driven Development (TDD), Architecture, Software Architecture, DNS, Algorithms, Metadata API, iOS, Social Networks, Privacy, Data Privacy, Early-stage Startups, Firebase, NoSQL, Databases, NestJS, Cloud, Python, Networking, .NET 6, React Redux, REST APIs, .NET 4, Vue, Google Maps, Microservices, Python 3, Kubernetes, Flutter, MySQL, CQRS, Automated Testing, Swagger, Scraping, PyCharm, PIP, RDBMS, Web Dashboards, Flask, Django, Recharts, C++, Azure Cosmos DB, MobX, JavaScript Testing, Behavior-driven Development (BDD), Webpack, Semantic UI, Azure DevOps

Head of Communications

2015 - 2021

TasteAtlas

Handled and managed all communication strategies with public relations, community relations, donors, marketing, and social media teams.
Led a team of five people to launch the project's first-ever traditional restaurant awards program, boosting the project's worldwide visibility.
Curated various content for the project—restaurant entries, food descriptions, creating and drawing regions of the world, and more.

Technologies: APIs, Testing, Quality Control (QC), QA Testing, QA Leadership, Software QA, Automation, Selenium, SEO Content, Content Management, Writing & Editing, Communication, Web Project Management, Agile Project Management, QGIS, GIS, Web Applications, Social Networks, Early-stage Startups, Google Maps

Experience

Humanitarian Web App

An initial version of a web application developed in React and .NET with the purpose of matching humanitarian requests and offers, displaying zones of interest or risk, tracking NGO and government shipments of various nature, etc.

National Crew Member Database for a EU Member's Ministry

A web application developed in React and .NET revolving around tracking the country's crew member database, issuing specific certificates and authorizations, and synchronizing relevant data with a central European database of crew members.

In-house Business Administration Tool

A web application developed in React and .NET to solve numerous in-house business, accounting, and staffing needs, such as invoice processing, project management, reporting tools, various HR tools, and much more.

Online Magazine Covering Mental Health

A website developed in React and .NET while borrowing headless CMS elements from Piranha CMS. The website serves as an online magazine, supported by dozens of authors, covering various topics regarding mental health, psychiatry, and psychology.

Power Transmission System Tool

A web application developed in React and .NET with the purpose of creating upcoming power requirements based on various input data. The app was fully developed with great assistance from power engineers.

Transmission Operators Yearly Reporting Tool

A web application developed in React and .NET with the purpose of collecting input data from numerous transmission operators, processing the various data accordingly, and generating yearly report documents.

Civil Engineering Calculations Tool

A web application developed in React and .NET for creating various calculations necessary in a structural project (e.g., wind, snow load, seismic, etc.) and generating a complete structural document for a specific project.

Digital Platform For Connecting Medical Professionals

A web application developed in React and .NET with the purpose of connecting various medical and healthcare professionals, such as nurses and caregivers, with the relevant institutions in a gig-oriented manner.

Community Management Solution

https://liteleaks.com

A solution consisting of a web application and a collection of web scraping scripts designed to collect and analyze fan activity and various other statistics for a prominent social media website. The automation of the scripts helped the client collect a lot more data in a fraction of the time.

Skills

Languages

C#, JavaScript, TypeScript, C#.NET, SQL, HTML, CSS, HTML5, GraphQL, Python, SCSS, Sass, Less, Python 3, Fortran, Go, C++

Frameworks

.NET, Redux, ASP.NET, ASP.NET Core, .NET Core, Bootstrap, .NET 4, Next.js, Express.js, Swagger, Selenium, React Native, Tailwind CSS, NestJS, Flutter, Flask, Django

Libraries/APIs

React, Node.js, Redux-Saga, React Redux, REST APIs, D3.js, Google Maps, Recharts, MobX, OpenStreetMap API, Leaflet, Metadata API, Vue

Tools

Visual Studio, pgAdmin, Figma, Git, GitHub, NGINX, RabbitMQ, PyCharm, Webpack, GIS, JavaScript Testing

Platforms

Visual Studio Code (VS Code), Windows, Linux, Azure, Docker, Firebase, MacOS, DigitalOcean, Amazon Web Services (AWS), iOS, Kubernetes

Storage

PostgreSQL, Microsoft SQL Server, Databases, SQL Server 2017, MongoDB, Azure Cloud Services, NoSQL, MySQL, RDBMS, Amazon S3 (AWS S3), Azure Cosmos DB

Other

Front-end, Back-end, Full-stack, Web Development, APIs, Styled-components, Back-end Development, Front-end Development, API Integration, Web Scraping, Responsive Web Apps, Full-stack Development, User Experience (UX), Dashboards, Data Visualization, Responsive UI, User Interface (UI), UI Components, Charts, Web Applications, .NET 6, Scraping, Web Dashboards, Semantic UI, OpenStreetMap, Mapping, Virtual Machines, CI/CD Pipelines, UI Animation, Integration Testing, Architecture, Software Architecture, DNS, Algorithms, Social Networks, Privacy, Data Privacy, Early-stage Startups, Cloud, Networking, PIP, Content Management Systems (CMS), Computer Science, Quality Control (QC), QA Testing, QA Leadership, Software QA, SEO Content, Content Management, Writing & Editing, Communication, Web Project Management, QGIS, Development, Software, Software Engineering, Deployment

Paradigms

DevOps, Agile, Test-driven Development (TDD), Microservices, Automated Testing, Testing, Automation, Agile Project Management, CQRS, Behavior-driven Development (BDD), Azure DevOps

Industry Expertise

Petroleum Engineering

Education

2016 - 2018

Master's Degree in Petroleum Engineering

University of Zagreb - Zagreb, Croatia

2013 - 2016

Bachelor's Degree in Petroleum Engineering

University of Zagreb - Zagreb, Croatia

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