Dražen is available for hire

Dražen Janjiček

Verified Expert in Engineering

Solutions Architect and Developer

Location

Novi Sad, Vojvodina, Serbia

Toptal Member Since

July 5, 2021

Dražen is a senior solutions architect with 10+ years of experience, working across different industries and fulfilling various roles. Through confidence and understanding of both technology and business domains, he can communicate with and lead technical and non-technical audiences. Dražen is capable of quickly switching focus between technology and business or being the bridge between both worlds.

Software Development Integration Software Engineering Repository Pattern C#C#.NET Visual Studio .NET ASP.NET Agile Git MVC Razor ASP.NET MVC Entity Framework REST APIs Sitecore

Portfolio

TrueLime

Agile Leadership, Architecture, ASP.NET MVC, Azure Cloud Services, Azure DevOps...

Commonwealth Financial Network

Agile Leadership, Architecture, Azure Cloud Services, Azure DevOps...

Litebit

ASP.NET Core, Azure DevOps, Azure Cloud Services, Web API, Blockchain, SQL...

Experience

C# - 15 years .NET - 14 years Content Management Systems (CMS) - 13 years Software Architecture - 11 years Solution Architecture - 10 years .NET Core - 6 years Azure Cloud Services - 3 years Enterprise Architecture - 2 years

Availability

Part-time

Preferred Environment

Visual Studio, .NET, .NET Core, IIS, Microsoft SQL Server, ASP.NET Core, ASP.NET MVC, Azure Cloud Services, C#, Cross-functional Team Leadership

The most amazing...

...thing about my career is that I have built up relationships with clients that continued on even when the assignment or project had ended.

Work Experience

Senior Software Architect

2021 - 2024

TrueLime

Developed a multi-channel and multi-tenant application platform.
Designed and developed integration points for all systems.
Coordinated the development progress and guided the development team and project executives throughout the agile process.
Designed and built a multi-channel virtual assistant based on Open.ai and Azure OpenAI specifications.
Developed a multi-channel chatbot integrating with OpenAI, Azure OpenAI, and the Microsoft Bot Framework.

Technologies: Agile Leadership, Architecture, ASP.NET MVC, Azure Cloud Services, Azure DevOps, Cloudinary, Azure Active Directory B2C (ADB2C), Umbraco, Kentico, C#.NET, Content Management Systems (CMS), Headless Software, Azure Search, Technical Architecture, Team Mentoring, Mentorship & Coaching, DevOps, ASP.NET, Web Development, ASP.NET Core MVC, JavaScript, APIs, GitHub, HTML, jQuery, CSS, Bots, Software Development, JSON, Single Sign-on (SSO), OpenAI GPT-3 API, OpenAI GPT-4 API, Agile, OpenAI, Application Architecture, Advisory, Technical Analysis, Technical Leadership, CI/CD Pipelines, REST APIs, Cloud Services, MVC Razor, Repository Pattern, Microsoft SQL Server, Web MVC, Razor, Azure App Service, Azure Cosmos DB, Azure Functions, Azure, Bootstrap, Integration, Team Management, Serverless Architecture, Separation of Concerns (SoC), API Architecture, SQL Server 2014, DRY, KISS, Clean Architecture, SOLID Principles, Monitoring, Marketing Technology (MarTech)

Enterprise Architect

2021 - 2022

Commonwealth Financial Network

Handled the solution design, technical project leadership, quality, and timely delivery of projects. Coordinated cross-functional teams and partnered with key technical stakeholders to design and implement solutions.
Managed application architecture by identifying functional objectives and performing technical analyses. Coordinated and reviewed application-solution proposals with the EA Review Board. Performed application solution architecture-roadmap alignment.
Acted as an SME for shared initiatives across IT: development, data, information security, infrastructure, and more. Conducted research, discovery, design, and analysis to refactor and transform complex legacy application and system components.

Technologies: Agile Leadership, Architecture, Azure Cloud Services, Azure DevOps, Technical Architecture, APIs, API Integration, Application Architecture, Advisory, Technical Analysis, Technical Leadership, Cloud Services, Integration, Team Management, Serverless Architecture, Separation of Concerns (SoC), API Architecture, Management, KISS, Clean Architecture, Monitoring

Technical Lead

2021 - 2021

Litebit

Worked closely with the product owner to align on business requirements, plan the software design, and created the development and testing strategies.
Developed high-performance and throughput APIs for cryptocurrency exchange.
Led a team of four developers: two locally and two remotely.

Technologies: ASP.NET Core, Azure DevOps, Azure Cloud Services, Web API, Blockchain, SQL, .NET 5, Technical Architecture, Microservices, APIs, GitHub, Jira, Software Development, Application Architecture, Advisory, Technical Analysis, Technical Leadership, REST APIs, Cloud Services, C#.NET, MVC Razor, Microsoft SQL Server, Web MVC, Razor, Azure App Service, Azure Functions, Azure, Integration, Team Management, Serverless Architecture, Separation of Concerns (SoC), API Architecture, SQL Server 2014, DRY, KISS, Clean Architecture, SOLID Principles, Monitoring

Technical Architect

2020 - 2021

Arcturus.io

Reviewed and assessed the entire Microsoft Azure services implementation for a possible production release.
Provided feedback and made suggestions on possible improvements for the current and future releases.
Refactored some of the Azure services for better reusability and maintenance.

Technologies: Azure Cloud Services, Agile Leadership, Cross-functional Team Leadership, Git, Technical Architecture, Web Development, Jira, Software Development, Application Architecture, Advisory, Technical Analysis, Technical Leadership, REST APIs, Cloud Services, Azure App Service, Azure Functions, Azure, Integration, Team Management, Serverless Architecture, Separation of Concerns (SoC), API Architecture, SQL Server 2014, DRY, KISS, Clean Architecture, Monitoring, RabbitMQ

Enterprise Architect

2018 - 2020

Essity

Held responsibility for defining reference architecture, striving for harmonization and simplification, and adapting to best practices to have fully integrated solutions in the IT landscape within Essity.
Closely collaborated with business partners, advisory on technical products, and solutions for a defined product roadmap.
Researched and analyzed candidate solutions driven by defined requirements, matching the necessary capabilities, security aspects, integration effort, and budget.
Supported product development teams with architecture support.

Technologies: Enterprise Architecture, Git, DevOps, APIs, Jira, Agile, Application Architecture, Advisory, Technical Analysis, Technical Leadership, REST APIs, Cloud Services, Integration, Team Management, Serverless Architecture, Separation of Concerns (SoC), API Architecture, Management, KISS, Clean Architecture

Principal Consultant, Solutions Architect

2010 - 2020

EXLRT

Set up and led Sitecore and Kentico competencies. Provided guidance and training to colleagues, learning the technologies and getting certified developers.
Maintained customer relationships. Discussed general progress and possible upscaling of our local teams.
Acted as a mentor to colleagues of all seniority levels. Helped to define their career path at the company and helped them to achieve their goals.
Supported the sales department with pre-sales activities.
Acted as a team lead for local and remote clients' teams of various sizes—from two to ten people.

Technologies: .NET, .NET Core, Team Leadership, Remote Team Leadership, Software Architecture, Mentorship, Sitecore, Kentico, Solution Architecture, Agile Leadership, Software Design, Git, .NET 5, Content Management Systems (CMS), Headless Software, Technical Architecture, Blazor, Delivery Management, Team Mentoring, Mentorship & Coaching, DevOps, Unit Testing, Web Development, ASP.NET Core MVC, JavaScript, TypeScript, APIs, GitHub, Jira, HTML, jQuery, CSS, Software Development, Dashboards, Payment APIs, Angular, JSON, Single Sign-on (SSO), Agile, Project Management, Application Architecture, Advisory, Technical Analysis, Technical Leadership, Entity Framework, REST APIs, Cloud Services, ASP.NET Web Forms, C#.NET, MVC Razor, Repository Pattern, Microsoft SQL Server, Web MVC, Razor, Azure App Service, Azure Functions, Azure, Bootstrap, Integration, Team Management, Serverless Architecture, Separation of Concerns (SoC), SQL Server 2014, Management, Engineering Management, DRY, KISS, Entity Framework Core, T-SQL (Transact-SQL), Clean Architecture, SOLID Principles, Monitoring, Marketing Technology (MarTech)

Software Architect

2012 - 2016

ING Group

Delivered a global intranet portal built on Sitecore 6.5, used by approx. 10,000 ING employees worldwide.
Developed a custom-built eCommerce solution that integrated with Sitecore and ING's back-end systems.
Managed local and remote teams with up to 10 members in total.
Supported the client from day one with decision-making and functional and non-functional requirements.

Technologies: .NET, Sitecore, SQL, Agile Leadership, Software Design, Git, Content Management Systems (CMS), Headless Software, Technical Architecture, Team Mentoring, Mentorship & Coaching, ASP.NET, Unit Testing, Web Development, JavaScript, APIs, GitHub, Jira, HTML, jQuery, CSS, Software Development, Single Sign-on (SSO), Agile, Application Architecture, Advisory, Technical Analysis, ASP.NET Web Forms, C#.NET, MVC Razor, Microsoft SQL Server, Web MVC, Razor, Integration, Team Management, Separation of Concerns (SoC), SQL Server 2014, T-SQL (Transact-SQL), Clean Architecture

Software Engineer

2007 - 2010

Fermlogic

Developed a custom-built ticket registration and hospitality management system for the Canon UEFA Euro 2008.
Created a custom-built HR talent analysis and management system.
Built a modular framework that supported rolling out new ticket registration websites fairly easily.

Technologies: .NET, SQL, Microsoft Silverlight, Git, Team Mentoring, ASP.NET, Web Development, HTML, CSS, Software Development, Technical Analysis, ASP.NET Web Forms, C#.NET, MVC Razor, Microsoft SQL Server, Integration, SQL Server 2014, T-SQL (Transact-SQL), .NET 2, Windows Presentation Foundation (WPF)

Experience

Enterprise Architect

As a member of Essity's enterprise architecture team, I was responsible for defining reference architecture, driving harmonization and simplification, and adapting to best practices to have fully integrated solutions in the IT landscape within Essity. I closely collaborated with business partners, advised on technical products, and provided solutions for a defined product roadmap. I also researched and analyzed candidate solutions, driven by defined requirements, matching the necessary capabilities, security aspects, integration effort, and budget.

Multi-site Online Platform for Vilans

Vilans is a national organization specializing in knowledge management for healthcare and support in the Netherlands. As the senior architect, I'm responsible for the overall architecture of the platform, involved components, and 3rd party integrations. We started with one website (vilans.nl), and now we're up to eight brand new websites fully rebuilt and content-migrated to this new platform. Umbraco 10 (currently) is the main platform for running the websites, while all content is managed within Kontent.ai. Cloudinary provides DAM capabilities to the platform.

Education

2007 - 2012

Bachelor's Degree in Computer Science

University of Rotterdam - Rotterdam, Netherlands

Certifications

FEBRUARY 2021 - PRESENT

Microsoft Certified: Azure Developer Associate

Microsoft

SEPTEMBER 2019 - PRESENT

Kentico 12 Certified Developer

Kentico Software

DECEMBER 2018 - PRESENT

Sitecore 9.0 Certified Platform Associate Developer

Sitecore

FEBRUARY 2013 - PRESENT

Certified Scrum Master

Scrum Alliance

OCTOBER 2012 - PRESENT

MCPD: Web Developer 4

Microsoft

Skills

Languages

C#, C#.NET, SQL, JavaScript, HTML, CSS, T-SQL (Transact-SQL), TypeScript, PHP

Frameworks

.NET, .NET Core, ASP.NET Core, ASP.NET MVC, .NET 4, .NET 5, ASP.NET, ASP.NET Web Forms, MVC Razor, Razor, Blazor, ASP.NET Core MVC, Entity Framework Core, .NET 2, Angular, Bootstrap, Windows Presentation Foundation (WPF)

Libraries/APIs

Entity Framework, REST APIs, Web API, jQuery

Tools

Visual Studio, Git, Kentico, Microsoft Silverlight, GitHub, Jira, Azure App Service, RabbitMQ, Azure Active Directory B2C (ADB2C), Azure Search

Paradigms

Microservices, Agile, Application Architecture, DRY, KISS, Clean Architecture, Azure DevOps, Scrum, Requirements Analysis, DevOps, Serverless Architecture, API Architecture, Management, Unit Testing

Platforms

Azure, Azure Functions, Blockchain, Umbraco

Other

Software Design, Technical Architecture, Software Architecture, Agile Leadership, Cross-functional Team Leadership, Software Engineering, Solution Architecture, Team Leadership, Remote Team Leadership, Mentorship, Mentorship & Coaching, Architecture, Team Mentoring, Content Management Systems (CMS), Headless Software, Communication, Leadership, Talent Management, .NET 6, Software Development, Advisory, Technical Analysis, Technical Leadership, Repository Pattern, Web MVC, Integration, Team Management, SOLID Principles, Marketing Technology (MarTech), Enterprise Architecture, Sitecore, Scrum Master, Kontent CMS, Web Development, APIs, API Integration, CI/CD Pipelines, Cloud Services, Separation of Concerns (SoC), Engineering Management, Monitoring, IIS, Delivery Management, Cloudinary, Bots, Dashboards, Payment APIs, Single Sign-on (SSO), OpenAI GPT-3 API, OpenAI GPT-4 API, OpenAI

Storage

Azure Cloud Services, Microsoft SQL Server, JSON, Azure Cosmos DB, SQL Server 2014

Industry Expertise

Project Management

Collaboration That Works

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