Senior.NET Engineer

About the Position

Ciklum is looking for a Senior.NET Engineer to join our team full-time in Bulgaria. 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.

As a Senior.NET Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Our client for this project is a leading global provider of audit and assurance, consulting, financial advisory, risk advisory, tax, and related services. They are launching a digital transformation project to evaluate existing technology across the tax lifecycle and determine the best future state for that technology. This will include decomposing existing assets to determine functionality, assessment of those functionalities to determine the appropriate end state, and building of new technologies to replace those functionalities.

Responsibilities

• Back-end development of new functionality
• Participating in code and architectural reviews, documenting architecture
• Communicating with stakeholders: PMs, developers, architects, QA engineers, and other colleagues
• Proactive position in solution development, processes improvements
• Delivering the product roadmap and planning for the future
• Handle complex problems that might arise during solution development and provide field support with creative and rapid solutions
• Ensure that the highest coding standards are met and write highly testable, automatable, and performant code over the whole SDLC
• Accelerated and Productive Development using AI Tools

Requirements

• More than 4 years of experience in commercial software development
• Excellent knowledge of computer science and computing theory: OOP, DDD, SOLID, TDD, BDD
• Database theory (RDBMS, NoSQL)
• Algorithms and data structure
• Design, architectural, and enterprise patterns
• Understanding of network protocols and conventions (e.g., HTTP, REST), authentication, and authorization flows and practices
• Experience with NoSQL (e.g., MongoDB, DynamoDB)
• Knowledge of key-value storages (e.g., Redis, Memcached)
• Basic knowledge of containerization and orchestration (Docker, Kubernetes)
• Excellent knowledge and experience with C# and .NET
• Should possess exposure and hands-on experience with AI tools preferably GitHub Copilot, and additionally exposure to Vibe coding
• Commercial experience with: -.NET Framework,.NET Core, ASP.NET (Core, MVC, WebAPI)
  • ORM (e.g., Entity Framework, Dapper)
  • RDBMS (especially SQL Server)
  • Messaging systems (e.g., RabbitMQ, ServiceBus)
  • Cloud providers (e.g., Azure)
  • Testing frameworks (e.g., NUnit, XUnit, MSTest)
  • Web Servers
  • Version control systems (e.g., GIT)
• Upper-intermediate English or above

Nice to Have

• Experience with Search Engines (e.g., ElasticSearch, Azure Search)
• Experience with REST API development for mobile applications
• Experience with integration with 3rd party solutions

Personal Skills

• Ability to relate positively to and engage with a wide range of people
• Strong self-motivation, reliable, and flexible team-player. High attention to details
• Always seeking to improve processes and suggest alternative better solutions
• Be ready to embrace change, be flexible
• Ability and willingness to mentor more junior team members

We Offer

• Regular salary reviews based on performance
• Corporate events: webinars, offline parties, and meetups
• Internal Mobility Program
• Tailored education path (including full access to Udemy, certifications, etc.)
• 25 paid days off: 20 business days of vacation per calendar year + 5 undocumented sick leave days
• Additional health insurance
• 100% company-covered Multisport card, with discounts available for family members

About the Company

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. Since expanding to Bulgaria in 2022, we’ve been building a fast-growing team that thrives on learning, collaboration, and innovation. Join us on this exciting journey and help shape the future of our delivery center.

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.