Вакансии C# / .NET Developer

As our company experiences active growth, we are actively seeking an optimistic and enthusiastic .NET Developer to join our team. Slotegrator is a leading provider of B2B solutions for the iGaming industry. We develop a complete software package for online business. Slotegrator provides its clients with the highest quality platform solutions, proven gaming content, and expert-level support.

Job requirements:

• Experience developing applications with micro-services architecture;
• Experience developing .NET web applications or 6 years of experience with .NET Core;
• Experience with .net framework 5+ and net core 3+;
• Good understanding of REST;
• Understanding and applying SOLID principles;
• Experience creating WebAPI;
• Knowledge of С#; API, REST; OOP, DDD, SOLID; Visual Studio; Kafka, PostgreSQL, ElasticSearch, Docker.

You will be responsible for:

• Development and support of .NET web applications;
• Business logic programming;
• Assistance with task time planning;
• Assistance with defining requirements;
• Creating new APIs and support of old APIs;
• Integration with external systems;
• Code refactoring;
• Internal testing and debugging;
• Communication with developers to distribute tasks;
• Mentoring and helping the team to achieve common goals.

Кожен заслуговує на шанс реалізувати себе – навіть початківець із мінімальним досвідом або взагалі без нього. Ми в NIX доводимо це на практиці, тож зараз шукаємо Junior Full Stack .NET Developer. У нас цей спеціаліст отримає всі можливості для потужного старту!

Що на тебе чекає:

• Розвиток за індивідуальним планом, розробленим твоїм керівником, та вдосконалення навичок на основі цього плану.
• Участь у розробці бізнес-логіки програм та виконання тестів.
• Проєкти по розширенню користувацького інтерфейсу та внесення ідей для його покращення.
• Розробка схем даних та інтегрування зі сторонніми сервісами.
• Оптимізація високонавантажених частин додатку та взаємодія з вразливостями безпеки.
• Входження до складу команди професіоналів, де кожен досягає якісних результатів.

Що тобі знадобиться:

• Досвід в ІТ-сфері від 1+ року.
• Відмінне знання OOP та основ платформи .NET (.Net Framework та.Net Core).
• Впевнене знання синтаксису C#.
• Досвід взаємодії з .NET Core, ASP.NET Core, CSS, HTML, JavaScript.
• Знання SQL та бази даних MS SQL, вміння ефективно використовувати EntityFramework.
• Сильна технічна англійська (Intermediate).

Буде перевагою:

• Досвід розробки веб-форм ASP.NET.
• Практичний досвід з WCF, WPF, Angular, React та тестуванням модулів (TDD, BDD).

Creatio is a global vendor of an AI-native platform to automate workflows and CRM with no-code and a maximum degree of freedom. Our platform combines an AI-first architecture, composable no-code tools, and enterprise-grade governance to help organizations build and scale faster.
We’re proud to be recognized by top industry analysts as a Leader and Strong Performer in multiple Gartner and Forrester reports.
In 2025, Creatio was named to Inc.’s Best Workplaces list, recognizing our commitment to employee wellbeing and a strong workplace culture.
As a Full-Stack Developer you will be joining a Sales Engineering team focused on building an Actionable Sales Management Platform to drive sales excellence across the organization. Our mission is to deliver AI-native solutions that empower sales teams with insights, automation, and tools for smarter decision-making

Responsibilities:

• Designing, coding, testing, and debugging software according to specifications and requirements
• Transforming the system design into actual software by writing code and implementing features
• Collaborating with stakeholders, and product managers
• Conducting unit tests, integration tests, and system tests
• Participate in scrum team activities
• Providing support for resolving customer cases and ensuring faultless Creatio operation

Requirements:

• 5+ years of overall programming experience, strongly focusing on .Net and Angular.
• Strong knowledge of object-oriented programming, KISS, SOLID, DRY principles.
• Confident knowledge of C# language and modern .NET platform (.NET6+).
• ASP.NET MVC, ASP.NET Core, experience with the development of Web APIs.
• Up-to-date Angular 15+ experience.
• You must know how to develop new and optimize existing components.
• Be able to work in a mono-repository and use RXJS library and pipeline operators.
• Hands-on experience with JavaScript, TypeScript languages, DOM, CSS/SASS.
• You must be able to style a page or component according to the given UI prototype.
• Source control systems like Git, SVN, experience with branch, merge, rebase.
• Unit testing, mocking, NUnit, Mock, Postman.
• English level - Upper–Intermediate or higher (spoken and business writing).
• Experience working with databases (MS SQL Server, PostgreSQL or Oracle) is a plus.

We are looking for a skilled and proactive Middle .NET Developer to join our team and play a key role in the modernization of our application platform. The primary focus of this role will be to support the migration of the UI layer from Angular to React, while maintaining and extending backend functionality developed with .NET Core 8. The ideal candidate will have hands-on experience in both frontend and backend technologies, a solid understanding of modern web application architecture, and a mindset geared toward clean, maintainable code.
As part of a cross-functional team, you will collaborate with other developers, designers, and stakeholders to refactor legacy components, ensure platform consistency, and contribute to the technical evolution of the product.
Project duration: 6 months

Customer

ConnectWise is the world’s leading software company dedicated to the success of IT solution providers. Their vision is to power a thriving IT ecosystem that transforms what’s possible for small and medium sized businesses (SMBs) and do this by empowering IT solution providers with unmatched software, services, and community to achieve their most ambitious vision of success. The tools being developed are used by IT service providers to automate their activities for SMBs, such as backup and restore, providing security, and performing administrative tasks on Microsoft 365 tenants.

Project

The project relates to a SaaS platform currently undergoing a frontend transformation from Angular to React.
The goal is to modernize the user interface, improve performance, and enhance maintainability while preserving core functionality.

Requirements

• At least 2 years of commercial experience in .NET development
• Solid experience with .NET Core 8, including developing and maintaining backend APIs in a microservices architecture
• Proficient in modern frontend development, with strong knowledge of React, including hands-on experience migrating components between frameworks. Experience in Angular as well is a big plus
• Understanding of UI/UX principles and frontend architecture, enabling effective refactoring and redesign during the migration process
• Familiarity with TypeScript, state management, and component-based design, ensuring maintainable and scalable frontend code
• Ability to identify reusable logic and collaborate with backend developers to align on platform modernization goals
• At least Upper-Intermediate level of English

Personal Profile

• Excellent communication and interpersonal skills, with the ability to collaborate effectively with cross-functional teams and stakeholders
• Strong problem-solving and decision-making skills, with a focus on driving results and meeting deadlines
• Self-motivated, adaptable, and eager to learn new technologies and frameworks

Responsibilities

• Participate in the migration of the application’s frontend from Angular to React, ensuring consistency, performance, and usability
• Collaborate with frontend and backend developers to refactor and integrate existing components into the new React-based platform
• Develop and maintain .NET Core 8 backend APIs and services to support evolving UI functionality
• Analyze and work with existing code to identify reusable logic and areas for improvement
• Write clean, maintainable, and testable code following best practices and team standards
• Participate in code reviews, knowledge sharing, and ongoing improvements to development workflows
• Work closely with QA, UI/UX designers, and product stakeholders to ensure feature completeness and quality

Our Email team is at the forefront of building Spacemail.com - a cutting-edge email platform that's rapidly gaining traction. With our platform just a year into its journey, we've already attracted thousands of active clients and started generating revenue. But we're just getting started, and we need talented developers like you to help take Spacemail.com to the next level.
As part of our team, you’ll dive into full-stack development, working with a robust tech stack that includes .NET Core microservices on the backend, React micro frontends on the client side, and Terraform for infrastructure on AWS. We're all about pushing boundaries and continuously improving our platform. We’re a highly motivated, agile team of professionals who are passionate about delivering results. If you thrive in a dynamic environment and love the challenge of turning ambitious ideas into reality, we’d love to hear from you.
As a Senior Developer on our team, you’ll play a pivotal role in every phase of the Software Development Life Cycle (SDLC). From understanding and processing requirements to creating innovative solutions and breaking them down into actionable tasks, you’ll be deeply involved in the entire development process.

Your responsibilities will include:

• Writing high-quality code with at least 80% test coverage
• Participating in team refinements, code reviews, and deployments
• Monitoring deployed code using tools like Kibana, New Relic, and Grafana to ensure everything runs smoothly in production
• Handling the occasional rollback and bug fix – because let’s be real, no deployment is perfect the first time
• Collaborating with other teams to ensure seamless integration and operation across the platform
• Documenting the architecture for new features and discussing it with the architecture team and other stakeholders
• In a production environment like ours, where downtime is not an option, you’ll be at the forefront of ensuring that SpaceMail.com runs flawlessly – even during the most critical times. Plus, there’s an exciting opportunity to step into a Tech Lead position as you grow with us.

Your expertise:

• At least 7 years of software development experience
• Excellent knowledge of C#, .NET, .NET Core
• Excellent knowledge of Entity Framework
• Good frontend knowledge React, TypeScript, HTML, CSS
• Excellent knowledge of relational databases PostgreSQL / MSSQL
• Good experience with Integration / Unit testing
• Good experience with ASP.NET Core
• Good experience with AWS cloud services like RDS, SNS / SQS, S3 etc
• Experience developing microservices
• Knowledge of software design patterns
• Experience with Docker
• Understanding of SOLID and other OOP principles
• Understanding of REST, RPC
• Excellent communication and organization skills, product-oriented mindset, focus on team results, willingness to constant personal and team improvements, leadership qualities
• Understanding SDLC
• Upper-intermediate or higher level of English
• A team player who helps the team to grow

Will definitely be a plus:

• Experience in a lead position
• Experience with Kubernetes
• Experience with Terraform
• Experience with MobX
• Understanding of CI / CD and experience with Jenkins and Vault
• Experience with creating solution Architecture and solving nonstandard CRUD tasks
• Experience with monitoring systems like Grafana, Kibana, OpenSearch, NewRelic etc.

Професіонали вищої ліги ніколи не зупиняються на досягнутому і завжди шукають шляхи вдосконалення своєї експертизи. Саме таким фахівцям підійде позиція Senior Full Stack .NET Developer в ІТ-команді NIX. З нами фахівець зможе вивести свою кар’єру на новий рівень і розкрити свій потенціал на максимум!

Що на тебе чекає:

• Дотримання індивідуального плану розвитку, розробленого й узгодженого з лідом, та вдосконалення своїх навичок
• Участь у написанні бізнес-логіки застосунку та покривати її тестами
• Розширення користувацького інтерфейсу та просування ідей для його покращення
• Розробка схем даних та інтеграція зі сторонніми сервісами
• Оптимізація високонавантажених частин додатку та взаємодія із вразливостями безпеки

Що тобі знадобиться:

• Щонайменше 5 років практичного досвіду в розробці комерційного програмного забезпечення
• Експертні знання C# та ASP.NET Core
• Досвід веброзробки з використанням HTML5, CSS, JavaScript, JSON, Ajax, а також знання сучасних вебфреймворків, таких як Angular, React, Material UI та Bootstrap
• Знання реляційних баз даних, таких як MS SQL та/або PostgreSQL
• Практичний досвід інтеграції з REST-вебсервісами 
• Практичний досвід написання юніт-тестів із використанням найпопулярніших фреймворків, таких як NUnit або xUnit
• Досвід використання Agile-методології та досвід взаємодії з командою Agile-розробників
• Володіння англійською мовою на рівні B2 або вище

Буде перевагою:

• Досвід з будь-якими хмарними платформами (MS Azure, AWS, GCP)
• Знання в області контейнеризації з використанням Docker, оркестрування та управління контейнерними рішеннями
• Практичний досвід з проблемами продуктивності та оптимізації, кейси з діагностування та запобігання цим проблемам
• Досвід техліда команди

The project involves implementing an idea from scratch to develop a cross-platform software solution for automating the creation of laboratory journal templates, their storage, and the ability to share these templates. The solution will leverage AI and support real-time cloud updates.
We are looking for a full-time Senior .NET Engineer with AI/LLM expertise to join our team.

Requirements:

• Five-year working experience with .NET (at least)
• 1 year of working experience with AI/LLM technologies (at least)
• Hands-on experience with a minimum of two projects utilizing OCR and/or NLP technologies
• Excellent knowledge of C#, ASP.NET Core, Entity Framework Core
• Good knowledge of OOP and SOLID
• Experience with Azure AI Studio
• Experience with Microsoft Azure services (Front Door, Static Web App, App Service, Blob Storage)
• Experience with Azure SQL, Microsoft SQL Server, Firebase, or PostgreSQL
• Bachelor’s or Master’s degree in computer science (or similar technical field)
• Level of English: Upper-Intermediate (at least)

Would be a plus:

• Experience with text summarization/structuring
• Knowledge of at least one UI framework (Angular, React, Vue.js)
• Knowledge of TypeScript, HTML, CSS, JS
• Experience with CI/CD
• Knowledge of Kubernetes
• Experience with containers (Docker)

Responsibilities:

• Research, study, and develop new or complex technical solutions/technologies (R&D) with active use of modern AI technologies
• Develop well-designed, easy-to-maintain, scalable, and reusable software
• Design, document, and demonstrate software architecture
• Develop automated unit tests, collect code coverage
• Implement performance/load/stress testing procedures according to project needs
• Provide continuous integration practices on the projects
• Setup integration with external software

We are looking for a Middle Automation QC Engineer to join our team and contribute to the quality of our products through well-structured and scalable automated testing. This is a great opportunity for someone with solid QA experience who wants to have an impact on testing processes, grow in automation, and work closely with developers in a fast-paced environment.

About the project

The client is one of the leading providers of healthcare solutions in the US, working with more than 10,000 organizations and 80M patients.
Project is an analytical system that allows users to report on clinical measures used for regulatory reporting programs.

Responsibilities

• Collaborate with developers, PM, project teams’ QAs and QA lead to communicate testing progress and issues, gather and clarify business and technical requirements.
• Design test strategies and write manual and automated test cases for new features.
• Execute automated and, when necessary, manual tests.
• Support and improve the existing automation framework (.Net or other).
• Integrate automated tests into CI/CD pipelines (e.g., GitHub Actions, Jenkins).
• Create and maintain tests for end-to-end, integration, and API testing.
• Analyze test results, report defects, and contribute to test process improvements.
• Continuously learn and apply new technologies, tools, and automation best practices.

Requirements

• 3+ years of experience in QA, with a focus on automation.
• Strong experience with test automation scripting (preferably .Net, Python).
• Good understanding of SDLC and testing methodologies.
• Experience with version control systems (GitHub, GitLab, etc.).
• Familiarity with RESTful APIs and Client/Server architecture.
• Experience writing SQL queries for data validation.
• Basic understanding of CI/CD tools and pipelines.
• English: Intermediate+

Would be a plus

• Experience with AWS
• Implement tests in Python

Blackthorn Vision is looking for a Junior Strong/Middle .NET Engineer. Our client, established in 2011 and based in Colorado, is a leading player in the U.S. application management market. We’ve had a successful partnership with this client and are seeking candidates who are eager to take ownership and improve a product already trusted by over 6,000 enterprises.

Requirements:

• 2+ years of commercial experience working on the backend as a .NET developer;
• Cloud systems development experience;
• Understanding of data access technologies, including Entity Framework and MongoDB;
• Experience with NoSQL databases;
• Experience with microservice-oriented architecture, parallel, and asynchronous programming design patterns;
• Experience with Kubernetes, Docker, and RabbitMQ;
• Proven experience with Azure technologies: Azure Entra id, Azure Storage accounts, Azure service bus, Azure container registry;
• Knowledge of design and architectural patterns.

Responsibilities:

• Develop and maintain high-quality software solutions using .NET 8.0;
• Take full ownership of delivering new features to end users, including designing architecture, implementing, testing, and onboarding the customer support team with new functionality;
• Collaborate with product owners, the support team, and end users to understand project requirements and deliver solutions;
• Participate in code reviews to enhance overall code quality;
• Ensure applications are high-performing, responsive, and of excellent quality;
• Troubleshoot and resolve technical issues and defects promptly;
• Create code documentation, technical specifications, and architecture diagrams for new features;
• Follow agile methodologies and participate in regular sprint planning and review meetings.

You are compatible with us if you:

• Have a proactive approach to taking ownership of decisions/features;
• Possess a strong, curiosity-driven mindset;
• Are comfortable with challenges;
• Have the ability to collaborate and build relationships with diverse personalities;
• Demonstrate customer-focused decision-making;
• Exhibit clear and timely communication;
• Are open to giving and receiving constructive feedback;
• Value the quality of your code;
• Are able to solve the required technical tasks and communicate throughout the process (for example, asking clarifying questions promptly).