Viktor is available for hire
Hire ViktorViktor Mateleshka
Verified Expert in Engineering
Software Developer
Location
Uzhhorod, Zakarpats'ka oblast, Ukraine
Toptal Member Since
December 26, 2019
Viktor is an expert in setting up and leading engineering teams. He consistently follows the data-driven approach in development, management, and business areas. With over a decade of experience, he has a profound knowledge of various solutions and always works with cutting-edge technologies. Viktor is the right person to accelerate your business.
Portfolio
Givelify LLC
PHP, CTO, Leadership, APIs, Back-end, Technical Leadership, API Integration...
Timescale Inc.
PHP, Laravel, CTO, Architecture, GitHub, Tailwind CSS, Product Strategy...
Kabru
CTO, Leadership, Node.js, React, MySQL, Architecture, Amazon Web Services (AWS)...
Experience
Availability
Part-time
Preferred Environment
Docker, Kubernetes, ASP.NET, Azure
The most amazing...
...project I've finished was shifting the release process from weekly to on-demand by implementing pure CD in a $100+ million company with over 500 engineers.
Work Experience
Director of Engineering
2021 - PRESENT
Givelify LLC
- Led distributed infrastructure teams with over 50 engineers in total. Increased engineering throughput by over 500%.
- Oversaw the development of the CI/CD process that resulted in an established microservices infrastructure with pure continuous deployment.
- Played a crucial role in transforming the company's engineering, resulting in significant business growth.
- Designed a high-load architecture that helps the business process over 100 million transactions annually and more than $1 billion in volume.
Technologies: PHP, CTO, Leadership, APIs, Back-end, Technical Leadership, API Integration, Laravel, GitHub, Product Strategy, WordPress, Technical Consulting, Team Leadership, Artificial Intelligence (AI), Full-stack Development, Machine Learning, Back-end Development, Cloud Infrastructure, Generative Pre-trained Transformers (GPT), PDF, Security, Microservices Architecture, B2C, Mobile Apps, Mobile Development, MERN Stack, Mobile App Development, Social Media Apps, User Experience (UX), User Interface (UI), Development, Technical Architecture
Senior CTO
2023 - 2023
Timescale Inc.
- Worked closely with the company owners to define a lean way of pivoting their ideas into a real product. Helped them to define the MVP and a rollout plan to get the shortest possible feedback loop from customers.
- Performed an audit across the company codebase, provided suggestions about future project establishment, and defined a roadmap to support the company's scale.
- Designed and implemented engineering processes in the company.
Technologies: PHP, Laravel, CTO, Architecture, GitHub, Tailwind CSS, Product Strategy, Amazon Web Services (AWS), Technical Leadership, Vue, JavaScript, Technical Consulting, Team Leadership, Back-end Development, Startups, MongoDB, User Experience (UX), User Interface (UI), Development, Technical Architecture
Chief Technology Officer
2021 - 2023
Kabru
- Successfully set up the engineering team from scratch.
- Designed and implemented engineering processes in the company.
- Delivered web and mobile platforms using the latest industry technologies.
- Helped the business to hit more than €10 million in monthly transaction volume.
Technologies: CTO, Leadership, Node.js, React, MySQL, Architecture, Amazon Web Services (AWS), Linux, Jira, CI/CD Pipelines, Automated Testing, Web Architecture, REST APIs, C#.NET, Azure DevOps, Software Architecture, Full-stack, Fintech, APIs, Microservices, Back-end, Technical Leadership, PHP, Cloudflare, API Integration, GitHub, Product Strategy, Technical Consulting, Product Management, Team Leadership, Full-stack Development, Back-end Development, Front-end Development, Cloud Infrastructure, PDF, Security, Microservices Architecture, Next.js, B2C, Mobile Apps, Mobile Development, Google Cloud, Express.js, MERN Stack, Mobile App Development, User Experience (UX), User Interface (UI), Development, Technical Architecture
Software Engineering Manager
2019 - 2021
JustAnswer
- Led distributed infrastructure teams of 20+ engineers. The main goal was to develop a CI/CD process to shift from weekly releases to releases on demand.
- Managed and mentored eight direct reports, helping them to grow their skills and expertise.
- Played a crucial role in the company’s software engineering structure by actively improving engineering throughput metrics.
- Participated in the company’s quarterly and yearly OKRs and goals definition.
- Collaborated in the company’s quarterly and yearly planning.
- Organized and led internal company conferences and training.
- Established performance-oriented company culture by introducing engineering throughput metrics tracking.
Technologies: .NET, Management, Documentation, Amazon Web Services (AWS), Leadership, Git, Visual Studio Code (VS Code), SQL, NoSQL, MySQL, Scrum, Agile, Visual Studio, Visual Studio SDK, Jenkins, Windows PowerShell, Azure, .NET Core, C#, Docker, Kubernetes, Linux, CI/CD Pipelines, Automated Testing, Web Architecture, REST APIs, C#.NET, Azure DevOps, Software Architecture, Twilio, Twilio API, Node.js, React, Full-stack, APIs, Microservices, RabbitMQ, Entity Framework, Cloud Architecture, Back-end, Technical Leadership, ASP.NET, SQL Server 2016, IIS, Azure Active Directory, API Integration, Laravel, GitHub, Product Strategy, Technical Consulting, Product Management, Team Leadership, Artificial Intelligence (AI), Full-stack Development, Machine Learning, Back-end Development, Cloud Infrastructure, Security, Microservices Architecture, B2C, Mobile Apps, MERN Stack, MongoDB, Mobile App Development, React Native, GitLab CI/CD, User Experience (UX), User Interface (UI), Development, Technical Architecture
Lead Software Engineer
2018 - 2021
Coro Global
- Contributed to a high-load fintech application using the ASP.NET technology stack.
- Managed the development team and worked on the global system architecture.
- Migrated the whole platform to the newest .NET 5 technology.
Technologies: Leadership, ASP.NET, C#, .NET Core, .NET 5, SQL, Azure, Windows PowerShell, Git, CI/CD Pipelines, JavaScript, Architecture, Linux, Automated Testing, Web Architecture, REST APIs, C#.NET, Azure DevOps, Software Architecture, Twilio, Twilio API, Full-stack, Fintech, APIs, Microservices, HTML, CSS, Entity Framework, Cloud Architecture, Back-end, Technical Leadership, Cloudflare, SQL Server 2016, IIS, Azure Active Directory, API Integration, GitHub, Product Strategy, Product Management, Team Leadership, Full-stack Development, Back-end Development, Front-end Development, Cloud Infrastructure, PDF, Security, Startups, B2C, Mobile Apps, Mobile Development, Mobile App Development, Flutter, User Experience (UX), User Interface (UI), Development, Technical Architecture
Lead Software Engineer
2016 - 2019
JustAnswer
- Led two distributed business initiative teams of 20+ engineers in total.
- Managed and mentored eight direct reports. Helped them to grow their skills and expertise.
- Led quarterly engineering OKR groups to achieve engineering-related goals with 10-20 people.
- Organized and led internal company conferences and training.
- Developed, from scratch, continuous delivery processes for several production applications.
- Solved dozens of architectural software development challenges.
Technologies: .NET, Management, Documentation, SOLID Principles, Object-oriented Programming (OOP), Leadership, Git, Linux, VMware, Visual Studio Code (VS Code), SQL, NoSQL, MySQL, Scrum, Agile, Visual Studio, Visual Studio SDK, Jenkins, Windows PowerShell, Azure, .NET Core, C#, Docker, Kubernetes, Architecture, CI/CD Pipelines, Automated Testing, Web Architecture, REST APIs, C#.NET, Azure DevOps, Software Architecture, Twilio, Twilio API, Node.js, React, Amazon Web Services (AWS), Full-stack, APIs, Microservices, HTML, CSS, RabbitMQ, Entity Framework, Cloud Architecture, Back-end, Technical Leadership, ASP.NET, SQL Server 2016, IIS, Azure Active Directory, API Integration, Laravel, GitHub, Tailwind CSS, Team Leadership, Artificial Intelligence (AI), Full-stack Development, Machine Learning, Back-end Development, Cloud Infrastructure, Python, Security, Microservices Architecture, B2C, Mobile Apps, MERN Stack, MongoDB, GitLab CI/CD, User Experience (UX), User Interface (UI), Development, Technical Architecture
Co-founder | Chief Technology Officer
2016 - 2018
ParsecLabs
- Founded, managed, and successfully scaled the blockchain company.
- Helped the company to grow from 3 to 20 people in two years.
- Utilized cutting-edge technologies to fulfill the business needs of clients.
Technologies: Management, Kanban, AWS CLI, SOLID Principles, Object-oriented Programming (OOP), Leadership, Git, Linux, Visual Studio Code (VS Code), SQL, NoSQL, MySQL, Visual Studio, Visual Studio SDK, Windows PowerShell, Azure, Groovy, Docker, Kubernetes, Solidity, JavaScript, CTO, Architecture, Automated Testing, Web Architecture, REST APIs, C#.NET, Azure DevOps, Software Architecture, Full-stack, APIs, Back-end, Technical Leadership, API Integration, GitHub, Product Management, Team Leadership, Full-stack Development, Back-end Development, Front-end Development, Security, Startups, Express.js, MERN Stack, User Experience (UX), User Interface (UI), Development, Technical Architecture
Senior Software Engineer
2015 - 2016
Thinkmobiles
- Contributed to the development of an eCommerce platform using an ASP.NET technology stack.
- Built an end-to-end CI/CD pipeline for a global eCommerce platform.
- Designed and developed automated testing tools and infrastructure.
- Mentored new software engineers in the company and helped them grow their knowledge base.
Technologies: .NET, Documentation, Automated Testing, Git, Jira, Batch, Visual Studio Code (VS Code), SQL, MySQL, Visual Studio, Visual Studio SDK, Groovy, TeamCity, Jenkins, C#, .NET Core, CI/CD Pipelines, REST APIs, C#.NET, Full-stack, APIs, HTML, CSS, Entity Framework, Back-end, SQL Server 2016, IIS, API Integration, GitHub, Vue, Tailwind CSS, WordPress, Full-stack Development, Back-end Development, Front-end Development, Security, User Experience (UX), User Interface (UI), eCommerce, Development
Software Engineer
2014 - 2015
S.I.N.S.
- Built an eCommerce platform using ASP.NET technology stack.
- Developed CI/CD scripts and pipelines using Jenkins.
- Designed and developed an API testing framework to simplify platform releases.
Technologies: .NET, Documentation, Test Automation, Git, SQL, MySQL, Visual Studio, Visual Studio SDK, Jenkins, C#, ASP.NET, Automated Testing, C#.NET, Full-stack, APIs, HTML, CSS, Back-end, SQL Server 2016, IIS, API Integration, Vue, Tailwind CSS, Full-stack Development, Back-end Development, User Experience (UX), Development
Software Engineer
2009 - 2014
Freelance
- Built numerous applications using ASP.NET technology in the eCommerce and banking sphere.
- Contributed to the development of automated testing infrastructure following the testing pyramid principles.
- Wrote test documentation which was reviewed by customers.
Technologies: .NET, Documentation, Git, SQL, MySQL, Visual Studio, Visual Studio SDK, NUnit, C#, ASP.NET, Automated Testing, C#.NET, Full-stack, APIs, HTML, CSS, Back-end, SQL Server 2016, IIS, API Integration, Back-end Development, User Experience (UX), Development
Experience
Chief Technology Officer
As a chief technology officer, I have successfully set up from scratch the engineering team and process. The team was able to onboard new clients and build the product based on their needs. The company became profitable in the first couple of months after it was founded.
Co-founder | Chief Technology Officer
We were developing a scalable blockchain for gaming and entertainment. I helped the company to grow from 3 to 20 people in 2 years. We have been selected as one of the recipients of the Ethereum Foundation Grant and our team was chosen in the category "Scaling" for the May 2018 batch (https://blog.ethereum.org/2018/05/02/announcing-may-2018-cohort-ef-grants/).
Software Engineering Manager (JustAnswer)
As a software engineering manager, I have successfully led the company's initiative to develop pure CD processes that allowed us to release code on demand. This affected overall company business metrics, allowed to grow the number of engineers to over 300, and affected net GSS by more than 50% yearly.
Skills
Languages
C#, SQL, C#.NET, HTML, PHP, Groovy, Batch, JavaScript, CSS, Python, Solidity
Frameworks
.NET, .NET Core, NUnit, ASP.NET, Laravel, Next.js, Windows PowerShell, Tailwind CSS, Express.js, .NET 5, Flutter, React Native
Libraries/APIs
Visual Studio SDK, React, REST APIs, Twilio API, Entity Framework, Node.js, Vue
Tools
Visual Studio, Jira, Jenkins, RabbitMQ, GitHub, GitLab CI/CD, Git, TeamCity, VMware, AWS CLI
Paradigms
Automated Testing, Agile, Scrum, Management, Object-oriented Programming (OOP), Web Architecture, Azure DevOps, Microservices, Microservices Architecture, B2C, Mobile Development, Kanban, Test Automation
Platforms
Azure, Twilio, WordPress, Kubernetes, Docker, Visual Studio Code (VS Code), Amazon Web Services (AWS), Linux
Storage
SQL Server 2016, Azure Active Directory, Google Cloud, MySQL, NoSQL, PostgreSQL, MongoDB
Other
Documentation, Leadership, Architecture, SOLID Principles, CI/CD Pipelines, CTO, Software Architecture, Full-stack, Fintech, APIs, Cloud Architecture, Back-end, Technical Leadership, Cloudflare, IIS, API Integration, Product Strategy, Technical Consulting, Product Management, Team Leadership, Artificial Intelligence (AI), Full-stack Development, Machine Learning, Back-end Development, Cloud Infrastructure, PDF, Security, Startups, Mobile Apps, User Experience (UX), User Interface (UI), Development, Technical Architecture, Front-end Development, Generative Pre-trained Transformers (GPT), MERN Stack, Mobile App Development, IT Project Management, Social Media Apps, eCommerce
Education
2020 - 2022
Master's Degree in Project Management
CEVRO Institut - Prague, Czech Republic
2008 - 2013
Master's Degree in Information Technologies
Uzhhorod National University - Uzhhorod, Ukraine
Certifications
FEBRUARY 2018 - PRESENT
Certified Continuous Delivery Guru
CDM
MARCH 2017 - PRESENT
Situational Leadership Associate
situational
AUGUST 2015 - PRESENT
Certified Scrum Master Training
UASM
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring