Ciklum is looking for a Senior .NET Engineer to join our team full-time n Ukraine.
We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.
About the role:
As a Senior .NET Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.
Ciklum’s client is a global payments technology company providing payment processing, acquiring, and financial technology solutions to businesses worldwide.
Responsibilities:
- Lead the migration and redesign of legacy application functionality into scalable, cloud-ready microservices, maintaining total feature parity with existing business rules
- Build high-performance RESTful Web APIs using C#, .NET Core, and the ASP.NET framework to support high-volume, transactional processing
- Design relational data models, author complex T-SQL queries, and optimize performance across SQL Server and Azure SQL using Entity Framework
- Manage source control, build automated deployment pipelines, and support cloud-ready solutions within Azure and Azure DevOps (ADO)
- Analyze system requirements, troubleshoot high-volume transaction bottlenecks, and communicate complex architectural decisions with technical and business stakeholders
Requirements:
- Senior-level proficiency in C#, .NET Core (8+), ASP.NET, REST APIs, and microservices architecture
- Proven track record modernizing legacy .NET Framework applications and web services into scalable, cloud-ready services
- Hands-on experience building high-volume, high-reliability transactional systems (fintech or payment processing background preferred)
- Expert-level knowledge of SQL Server and Azure SQL, including database design, T-SQL development, and performance tuning
- Deep experience using Entity Framework for Object-Relational Mapping (ORM) and data access layers
- Hands-on experience with Microsoft Azure and Azure DevOps (ADO) for version control, task tracking, and CI/CD pipeline management
- Full mastery of Microsoft Visual Studio and standard .NET software engineering workflows
- Exceptional analytical skills with strong written and verbal communication abilities
- Upper-Intermediate level of English or higher
Desirable:
- Deep understanding of payment gateway architecture, transaction lifecycles, and payment domain security
- Exposure to modern frontend stacks (React.js) or traditional server-rendered UIs (ASP.NET MVC / Razor) with JavaScript and jQuery
What’s in it for you?
- Strong community: Work alongside top professionals in a friendly, open-door environment
- Growth focus: Take on large-scale projects with a global impact and expand your expertise
- Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
- Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
- Flexibility: Enjoy radical flexibility – work remotely or from an office, your choice
- Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations
About us:
At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.
As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future.
Explore, empower, engineer with Ciklum!
Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.
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