C# .NET Developer

CluneTech

. Design, develop, and maintain backend components of the CRM application using C# and .NET .

Posted 10/8/2026full-timeVarna • BulgariaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in C# and the .NET ecosystem, with strong expertise in object-oriented programming, unit testing, and test-driven development. Demonstrates ability to design and maintain backend components, integrate with APIs, and optimize existing functionality while ensuring code quality and reliability.

Highest-signal resume keywords

C# ProgrammingASP.NET DevelopmentEntity FrameworkTest Driven Development (TDD)PostgreSQL Database Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C# ProgrammingObject-Oriented Programming (OOP)Entity FrameworkDapperLINQAsynchronous Programming (Async/Await)Unit TestingTest Driven Development (TDD)REST API IntegrationMessage Brokers (RabbitMQ)

Soft Skills

Clear CommunicationEffective CollaborationProblem-SolvingAttention to DetailWillingness to Learn

Tools & Technologies

GitAWSAutoMapperXUnitMoqFluentAssertionsDocument Processing LibrariesKiroAI-Assisted Development Tools (GitHub Copilot)

Industry Keywords

CRM Application DevelopmentLayered ArchitectureCoding StandardsCode ReviewsClean Code Practices

Tech Stack

Tools & technologies

AWSCloudEntity FrameworkPostgresRabbitMQ.NET

About the role

Key responsibilities & impact

Design, develop, and maintain backend components of the CRM application using C# and .NET
Work with relational databases to build efficient queries and data access layers
Implement business logic using clean, maintainable patterns and layered architecture
Write well-tested code following unit testing and test-driven development practices
Collaborate on feature development, bug fixing, and system improvements
Integrate with internal and external APIs and services
Participate in code reviews and contribute to improving coding standards and practices
Support ongoing maintenance and optimization of existing functionality

Requirements

What you’ll need

Proficiency in C# and the .NET ecosystem
Strong understanding of object-oriented programming (OOP) principles
Solid experience with ORM frameworks, particularly Entity Framework and Dapper
Experience working with relational databases, preferably PostgreSQL
Familiarity with layered application architecture and common design patterns (Repository, Unit of Work, DTOs, Dependency Injection)
Good working knowledge of LINQ, Generics, Extension methods, and asynchronous programming (async/await)
Experience using Git for version control
Strong experience with unit testing practices
Experience working with or understanding of Test Driven Development (TDD)
Experience with message brokers such as RabbitMQ
Familiarity with document processing libraries for PDF, Excel, Word, and CSV generation/parsing
Exposure to cloud platforms, particularly AWS
Experience with object mapping libraries such as AutoMapper
Familiarity with unit testing frameworks and tooling such as xUnit, Moq, and FluentAssertions
Experience integrating with and consuming REST APIs
Experience integrating with SAP systems
Exposure to AI-assisted development tools such as GitHub Copilot
Experience or familiarity with Kiro
Ability to write clean, maintainable, and well-structured code
Strong focus on code quality, testing, and reliability
Comfort working with existing systems and building new features
Clear communication and effective collaboration
Problem-solving ability, attention to detail, and a pragmatic approach to development
Willingness to learn and grow within a supportive engineering environment

Benefits

Comp & perks

Flexible Working Policy with a combination of remote and office working
Multisport Cards
22 Annual Leave Days for all employees plus additional days with length of service
Lifework days: ½ day each quarter to get your life work done
Flex hours where you can work your 40 hours across 4.5 days
Additional Health Insurance including dental and vision care
Team Buildings & Parties
Life Insurance
Refer a Friend Bonus
Discounts across various stores, theatres, restaurants
Employee-led CSR Programme, CluneTech Cares, with one paid Volunteer Day per year
CluneTech Life – corporate wellness program
Monthly Food Vuchers
Company Paid Trainings & Learning Accounts
#OneTeam Awards and Annual Employee of the Year Awards
Milestone Recognition Program
Free Sports: Football, Tennis, Volleyball
Employee Assistance Program
Meeting Free Days
Compassionate Leave: up to 4 weeks paid leave for the loss of a loved one
Compassionate Leave for pets: up to 2 days
5 days company-paid Miscarriage / Pregnancy Loss Leave (applicable for partner also)