Jobs C# / .NET

The Defense Procurement Agency (DOT) is a state-owned enterprise responsible for procuring military equipment, ammunition, UAVs, fuel, food, clothing, and other critical supplies for the Armed Forces of Ukraine and the Defense Forces.

Our mission: Strengthening Ukraine's defense capabilities by ensuring reliable procurement and supporting the development of the national defense industry.

Our vision: To become the driving force behind a modern defense procurement ecosystem built according to NATO standards.

We are looking for an ERP Developer (.NET) to help develop, maintain, and enhance our corporate ERP platform, automate business processes, build system integrations, and ensure the stable operation of mission-critical enterprise services.

Responsibilities

• Develop, maintain, and improve the corporate ERP system according to business needs.
• Analyze business requirements and participate in solution design and technical implementation.
• Configure and support business processes, workflows, documents, directories, reports, and approval routes.
• Develop and maintain integrations with internal and external systems using APIs, databases, file exchange, and other integration mechanisms.
• Work with relational databases, write and optimize SQL queries, validate data integrity, and troubleshoot data issues.
• Participate in testing, release management, incident investigation, bug fixing, and production support.
• Create and maintain technical documentation for implemented features, integrations, configurations, and data processing logic.

Requirements

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 2+ years of experience working with ERP or enterprise information systems.
• Experience analyzing business requirements and configuring business processes, workflows, documents, reports, or approval routes.
• Strong SQL skills and hands-on experience with relational databases.
• Understanding of system integration principles and experience with APIs or other data exchange mechanisms.
• Basic knowledge of C#/.NET or another backend technology is a plus.
• Experience with testing, troubleshooting, and technical documentation.
• Strong analytical and problem-solving skills.
• Attention to detail and commitment to system reliability and software quality.
• Willingness to work with both new development and legacy systems.
• Strong communication skills and ability to collaborate with technical teams and business stakeholders.
• Ability to work independently and take ownership of assigned tasks.
• Zero tolerance for corruption.

Nice to Have

• Hands-on experience with IT-Enterprise ERP.
• Experience developing or supporting IT-Enterprise modules.
• Experience automating document management and approval workflows.
• Experience with procurement, finance, warehouse, inventory, or accounting processes.
• Experience working in government institutions or large enterprise environments.

What We Offer

• Work that directly contributes to strengthening Ukraine's defense capabilities.
• Official employment with competitive salary and full social benefits.
• Professional development, learning opportunities, and career growth.
• Structured onboarding and dedicated mentorship.
• A collaborative, supportive, and mission-driven team.
• Modern office near the metro with reliable internet and equipped shelter.
• Opportunity to work on large-scale enterprise systems with real national impact.

By joining our team, you will contribute to one of Ukraine's largest digital transformation initiatives in the defense sector and help build the future of defense procurement.

Ready to make a real impact? We'd love to hear from you. Apply today!

* By submitting your CV, you consent to the processing of your personal data in accordance with applicable legislation.

** Due to the high volume of applications, only candidates whose qualifications best match the position will be contacted.

ZentixSoft is looking for a Senior Backend Developer – Tech Lead! 🚀

Format: Full-Time Outstaffing, long-term remote engagement. 
 

💡 Why ZentixSoft?

💸 Salary Review: A structured system of compensation reviews aligned with your engineering growth.

⚖️ Work-Life Balance: Sustainable workflows with no senseless overtime, helping you keep your resource fully charged.

🦾 Trust and Transparency: Zero micromanagement and no invasive time-trackers—we fully trust your professional autonomy.

🎁 Gifts & Culture: Corporate gifts for holidays, birthdays, and a true team atmosphere where your voice always matters.
 

🧩 Responsibilities:

• Architecture & Development: Architect, design, develop, and support high-performance business applications using C# and modern .NET ecosystems.
• Technical Leadership & Mentorship: Serve as the driving force behind backend activities, mentoring developers and raising code quality across the team.
• API & Integration Design: Build and consume high-speed RESTful APIs with advanced rate-limiting, caching, and queuing mechanisms.
• Messaging & Microservices: Implement messaging communication patterns using message brokers (RabbitMQ, Kafka, or Azure Service Bus).
• Engineering Standards: Adopt best practices in software design patterns, CI/CD, unit/integration testing, structured logging, and authorization security.
   

🎓 Our Perfect Match (Requirements):

• Backend Expertise: 6+ years of commercial backend development experience with C# and .NET frameworks.
• Databases: Strong SQL skills with relational databases (preferably PostgreSQL or MySQL).
• Messaging & APIs: Hands-on experience with messaging systems (RabbitMQ, Kafka, or Azure Service Bus) and advanced API design.
• Software Architecture: Deep knowledge of modern design patterns, microservices architectures, MVC, and software design principles.
• Testing & Tools: Experience with unit and integration testing, Git workflows (GitHub), structured logging, and authorization/security standards.
• Frontend Fundamentals: Working knowledge of basic web technologies (HTML, CSS, JavaScript, HTTP protocols).
• Soft Skills & Communication: Strong written and verbal English skills, team orientation, and a proactive, solution-minded attitude.
   

➕ Nice to Have:

• Experience with Blazor, gRPC, or Angular (reactive programming).
• Experience with TDD (Test-Driven Development) and Scrum/Agile methodologies.
   

📍 Project Details:

⏳ Duration: Long-term (Full-time).

📍 Location: Fully Remote.

Наш клієнт, Growe, провідна консалтингова компанія та група сервісів у сфері iGaming і розваг. Вони створюють стратегії, що працюють, та рішення, які масштабуються. Поєднуючи стратегічне бачення з практичним досвідом, Growe допомагає бізнесам орієнтуватися в динамічній індустрії, відкривати нові можливості, виходити на нові ринки та досягати сталого зростання.

Ідеально для тих, хто прагне:

• Реалізовувати ініціативи з backend-розробки;
• Писати чистий, читабельний, підтримуваний і добре структурований код;
• Координувати взаємодію між командами та залежності в межах призначених ініціатив;
• Брати на себе відповідальність за отримані ініціативи під рев’ю Tech Lead;
• Робити внесок у надійність, продуктивність і підтримуваність production-систем.

Досвід, який стане твоєю перевагою:

• 3+ роки комерційного досвіду backend-розробки з C# / .NET 6+, .NET Core та ASP.NET Core;
• Глибоке розуміння мікросервісної архітектури та розподілених систем;
• Просунутий досвід роботи з асинхронною комунікацією та event-driven архітектурою;
• Досвід роботи з брокерами повідомлень, такими як Kafka або аналогічними;
• Поглиблені знання реляційних баз даних, включаючи SQL, транзакції, індексацію та оптимізацію продуктивності; PostgreSQL буде перевагою;
• Просунутий досвід роботи з ORM-інструментами, такими як Entity Framework;
• Досвід написання unit та integration тестів;
• Просунуті знання автентифікації та авторизації, включаючи OAuth 2.0 та OpenID Connect;
• Розуміння принципів проєктування програмного забезпечення, включаючи SOLID, separation of concerns та testability;
• Розуміння observability та моніторингу production-систем.

Ми цінуємо:

• Сильне відчуття відповідальності за призначені ініціативи;
• Здатність самостійно працювати як над тривіальними, так і над нетривіальними завданнями;
• Ефективна координація та співпраця між командами;
• Увага до чистого, читабельного та підтримуваного коду.

Наші клієнти пропонують конкурентні переваги для підтримки вашого професійного та особистого зростання, зокрема:

• Орієнтація на здоров’я та добробут;
• Глобальне медичне страхування;
• Можливості для зростання;
• Програми бенефітів (компенсація спорту / стоматології / психолога тощо);
• Бонуси за досягнення результатів;
• Динамічне робоче середовище.

Долучайся — і нехай твоя історія зростання розпочнеться.

English version:

Our client, Growe, is a leading business advisory and services group in iGaming and Entertainment. Сreators of strategies that work and solutions that scale. Combining strategic vision with hands-on expertise, Growe helps businesses navigate the fast-evolving industry, seize new opportunities, enter new markets, and achieve sustainable growth.

Perfect for those who aim to:

• Deliver backend development initiatives;
• Write clean, readable, maintainable, and well-structured code;
• Coordinate cross-team interactions and dependencies within assigned initiatives;
• Take ownership of received initiatives under the Tech Lead’s review;
• Contribute to the reliability, performance, and maintainability of production systems.

Experience you’ll need to bring:

• 3+ years of commercial backend development experience with C# / .NET 6+, .NET Core, and ASP.NET Core;
• Deep understanding of microservices architecture and distributed systems;
• Advanced experience with asynchronous communication and event-driven architecture;
• Experience working with message brokers such as Kafka or similar;
• In-depth knowledge of relational databases, including SQL, transactions, indexing, and performance optimization; PostgreSQL is an advantage;
• Advanced experience with ORM tools, such as Entity Framework;
• Experience writing unit and integration tests;
• Advanced knowledge of authentication and authorization, including OAuth 2.0 and OpenID Connect;
• Understanding of software design principles, including SOLID, separation of concerns, and testability;
• Understanding of observability and monitoring in production systems.

It’s a perfect match if you have those personal features:

• Strong ownership of assigned initiatives;
• Ability to work independently on both trivial and non-trivial tasks;
• Effective cross-team coordination and collaboration;
• Attention to clean, readable, and maintainable code.

Our clients offer competitive benefits to support your professional and personal growth, including:

• Health & Wellness Focus;
• Global Medical Coverage;
• Growth Opportunities;
• Benefits Programs (compensation for the gym/stomatology/psychological service & etc.);
• Performance-Driven Rewards;
• Dynamic Work Environment.

Apply, and let your growth journey begin.

We are looking for C# developer for our music software

( work in Lviv or Kyiv,

remote work possibility ):

www.MusConv.com

About the project:

MusConv is b2c music software which helps people synchronize their music between music services: Spotify, Apple Music, YouTube Music, Amazon Music, Tidal and others.

We offer:

Challenging interesting project

Professional growth and development program

Flexible schedule

Team of highly talented individuals

Access to developer courses like https://www.pluralsight.com

Mentor: code reviews, studying( fiddler, postman, asynchronous programming, etc.)

5% of sources is simple gui based on xaml( avalonia similar to wpf )

95% of sources is regular .net standard( backend to interact with different music services )

We are looking for C# developer to implement new features

We are looking for a Senior Backend Developer to join a product team in the travel industry and take part in the full product development lifecycle - architecture, system design, development, deployment, and maintenance of new and existing features.

You'll work closely with the development team to ensure system consistency and a great user experience, and you'll be the driving force behind all back-end activities.

What you'll do:

• Develop, maintain, and support internal business applications in C# / .NET 10;
• Own architecture and system design decisions across new and existing features;
• Mentor other developers and help grow their skills;
• Drive best practices in development, code versioning, testing, and deployment (CI/CD);
• Recommend innovative solutions that bring value to the business.

Requirements:

• 6+ years of backend development experience with C# and related technologies;
• Strong SQL skills, preferably PostgreSQL or MySQL;
• Strong experience creating and consuming APIs (rate limiting, caching, performance, queues);
• Experience with messaging systems and communication patterns (RabbitMQ, Kafka, or Azure Service Bus);
• Solid understanding of software design principles, modern design patterns, MVC, and microservices;
• Experience with unit and integration testing;
• Experience with authorization and security, and with structured logging;
• Confident with Git / GitHub;
• Basic knowledge of front-end technologies: HTML, CSS, JavaScript, HTTP protocols;
• Strong English, verbal and written;
• Team player with a positive attitude and intrinsic motivation.

Nice to have:

• Blazor;
• gRPC;
• Angular and reactive programming principles;
• Test-Driven Development (TDD);
• Scrum / Agile experience.

Job Description

• 5+ years of development experience
• .Net Development with WinForm
• Solid understanding of OOP, design patterns, software development principles and best practices
• Experience with Azure Cloud Solutions
• Unit testing
• Good communication and task management skills
• English level - Advanced

Job Responsibilities

• Design, develop, and maintain scalable, API-driven backend services
• Troubleshoot complex technical issues and optimize performance of applications.
• Unit testing
• Collaborate with engineering, product, and design teams to ensure seamless integration across the broader data platform.

Department/Project Description

Client is a leading global Contract Research Organization (CRO) that provides Phase I-IV clinical trial management, market access, and technology solutions with over 30 years of experience.

Job Description

5+ years of experience in software development, with a focus on C#, React, and .NET Core.
Strong knowledge of object-oriented programming, design patterns, and modern software architectures (e.g. serverless, microservices, containerized, etc.).
Proficiency in front-end development using React.js and modern JavaScript/TypeScript frameworks.
Experience with cloud platforms (e.g., Azure, AWS, or GCP). - Azure preferred
Experience with CI/CD pipelines, unit testing, and deployment automation tools.
Excellent problem-solving skills and ability to work in a fast-paced, agile environment.
Experience working with Azure DevOps for task tracking and code repository would be a plus.
Experience working with AI-based productivity tools would be a plus.
Experience with NextJS and Syncfusion UI component library would be a plus.

Job Responsibilities

Perform as part of a team in designing, developing, and deploying high-quality applications using C#, React, and .NET Core working on one of the workstreams on the project in Healthcare domain.

Conduct code reviews and support junior team members to ensure technical excellence and professional growth.

Department/Project Description

Client is a leading global Contract Research Organization (CRO) that provides Phase I-IV clinical trial management, market access, and technology solutions with over 30 years of experience.

We’re building a next‑generation financial leasing ecosystem on Creatio — not just a CRM, but a unified platform that connects business processes, customer experience, and modern digital channels. To accelerate our growth, we’re looking for a Creatio Developer who will drive technical excellence and help scale the product.

💡 About the Project

Our core solution is a Creatio‑based platform that automates the full financial leasing lifecycle — from application to contract servicing. And we’re expanding fast:

📱 Mobile app (Flutter) 🌐 Web portal (Angular) 🔗 Integrations with external services via API

🎯 What You’ll Do

• Full lifecycle application development
• Produce clean, efficient, well-documented codebase

• Be active part of the team

   

🛠️ What We’re Looking For

• Knowledge in CRM Creatio more than 1 years — MUST!
• Knowledge in C#, .NET, JavaScript, Ext.JS
• REST knowledge
• SQL knowledge (MS SQL Server)
• Understanding of: HTTP, XML/JSON
• Familiar with continuous integration (Jenkins) and source control systems such as GIT
• Understanding of SDLC process (Agile/Scrum)
•  

⭐ Why This Role Is Exciting

• You influence the product from the ground up
• A diverse tech landscape: CRM + mobile + web
• A team you can shape and develop

• Freedom to make architectural and technical decisions

   

🌟 Why 7,000 Employees Have Chosen Us

• Growth every day: structured career development, internal training programs, and opportunities to gain new skills.
• A supportive, inspiring team: a professional environment where your ideas matter and collaboration is the norm.
• Flexibility that works for you: hybrid format, flexible schedule, and the ability to balance productivity with comfort.
• Wellbeing matters: table tennis, psychological support, and legal assistance to help you stay balanced.
• Meaningful impact: participation in social initiatives that make a real difference and add purpose to your work.
• A culture of trust: mistakes are treated as learning opportunities, and achievements are celebrated together.
• Modern tools & technologies: everything you need to work efficiently and enjoy the process.

.NET Engineer (Microsoft Teams / Voice Platform)

We are looking for a .NET Engineer to join a product team working on a voice and communication platform with a strong focus on Microsoft Teams integrations.

The product handles voice communication workflows, calls, meetings, recordings, and communication data. In this role, you’ll be responsible for building and improving backend services that connect the platform with the Microsoft Teams ecosystem.

Responsibilities

• Develop backend functionality using C# / .NET and ASP.NET Core
• Build and support integrations with Microsoft Teams
• Work with Microsoft Graph API and Teams communication APIs
• Implement solutions for calls, meetings, recordings, and related communication data
• Develop and maintain REST APIs and integration services
• Diagnose and resolve production issues across Teams and voice-related functionality
• Improve system stability, performance, and scalability

• Participate in backend architecture and technical decision-making

   

Requirements

• 3+ years of professional C# / .NET development experience
• Strong background in backend engineering and ASP.NET Core
• Hands-on commercial experience with Microsoft Teams integrations
• Experience working with Microsoft Graph API
• Practical knowledge of APIs related to Teams calls, meetings, recordings, or communications
• Experience integrating external systems and third-party APIs
• Good understanding of SQL, databases, and backend design principles
• Ability to independently investigate and solve technical issues

• English level: B2 or higher

   

Will be a plus

• Experience with Microsoft Graph Communications APIs
• Teams compliance recording or other call-recording solutions
• Background in VoIP, telephony, voice platforms, or contact center solutions
• Experience with real-time audio/media processing
• Knowledge of WebRTC, SIP, RTP
• Experience with SignalR or WebSockets

• Experience with Azure

   

Who we’re looking for

We’re looking for a backend-focused engineer who already has practical Microsoft Teams integration experience and is comfortable working with complex communication APIs.

The ideal candidate understands not only .NET development, but also how calls, meetings, recordings, and real-time communication integrations behave in production.

What We Offer

• Long-term product project
• Transparent compensation
• Paid vacation and sick leave
• Learning and professional development support
• High-quality equipment
• Paid office lunches
• Anniversary gifts and baby bonus

Domain: Banking & Finance
Experience: 8+ years
Project Duration: October 1, 2026 – March 30, 2027
Format: Hybrid
Location: Wrocław, Poland

About the Project

We are looking for an experienced Senior .NET Application Developer to join a dynamic technology team based in Wrocław.

The role focuses on designing, developing, and maintaining scalable enterprise-level applications using .NET and Microsoft Azure. You will work closely with cross-functional teams in an Agile environment and contribute to technical solutions and continuous improvement of the development process.

Responsibilities

• Design, develop, and maintain scalable enterprise applications using C# and .NET
• Build and integrate RESTful APIs and microservices
• Develop cloud-native solutions using Microsoft Azure
• Contribute to application architecture and technical design decisions
• Work with Azure DevOps, CI/CD pipelines, and source control systems
• Ensure application quality through development best practices, testing, and code reviews
• Troubleshoot and resolve complex technical issues
• Collaborate with cross-functional teams in an Agile/Scrum environment
• Contribute to continuous improvement of development processes and solutions

Requirements

• 8+ years of professional software development experience
• Strong proficiency in C# and .NET, including .NET Framework, .NET Core, and .NET 8
• Solid hands-on experience with Microsoft Azure and cloud-native application development
• Practical experience designing and developing RESTful APIs and microservices
• Strong understanding of object-oriented programming, software design principles, and development best practices
• Experience with Azure DevOps, CI/CD pipelines, and Git or similar version control systems
• Good knowledge of relational databases, particularly Microsoft SQL Server
• Previous experience working in Agile/Scrum environments
• Strong analytical, troubleshooting, and problem-solving skills
• Excellent written and spoken English

Nice to Have

• Microsoft Azure certifications
• Experience with Docker, Kubernetes, or other containerization technologies
• Knowledge of event-driven architectures and Azure messaging services
• Exposure to modern frontend frameworks and technologies

Tech Stack

• C#
• .NET / .NET Core / .NET 8
• Microsoft Azure
• RESTful APIs
• Microservices
• Azure DevOps
• CI/CD
• Git
• Microsoft SQL Server
• Agile / Scrum

Preferred Technologies

• Docker
• Kubernetes
• Azure Messaging

We’re looking for a Senior Microsoft Dynamics 365 CE Developer to join a project focused on extending and maintaining an existing, heavily customized Dynamics 365 Customer Engagement solution.

What you’ll do

• Develop and maintain customizations for Dynamics 365 CE / CRM.
• Work with C#/.NET, plugins, Custom APIs and Dataverse SDK.
• Design and optimize Dataverse data models.
• Develop JavaScript/TypeScript form scripts and PCF controls.
• Work with Model-driven Apps and Power Platform.
• Build and maintain integrations with Azure services and external systems.
• Troubleshoot production issues and optimize performance.
• Manage solutions and ALM across Dev/Test/Prod environments.
• Perform data migrations and work with security configurations.
• Make technical decisions and independently estimate and break down tasks.

Requirements

• 5+ years of experience with Dynamics 365 CE / CRM.
• Strong C# / .NET experience.
• Solid knowledge of Microsoft Dataverse.
• Experience with JavaScript / TypeScript.
• Experience with PCF, React.
• Strong understanding of Dynamics 365 Model-driven Apps.
• Experience with Power Automate.
• Knowledge of Dynamics 365 security model.
• Experience with REST / Web API, OData, FetchXML.
• Experience with Azure Service Bus, Webhooks, Azure Functions.
• Knowledge of Entra ID / Azure AD, OAuth 2.0.
• Experience with performance optimization and troubleshooting.

• Experience with data migration tools such as Configuration. Migration Tool, KingswaySoft / SSIS or Data Import Wizard.

   

Nice to have

• Power Pages / Portals.
• Git, Azure DevOps / GitHub Actions, Power Platform Build Tools, pac CLI.
• Azure Functions, Logic Apps, Key Vault, Application Insights, API Management.
• SQL Server, Azure Synapse Link / Microsoft Fabric.
• Dynamics 365 Sales, Customer Service or Field Service.
• Dual-write / Dynamics 365 F&O integrations.
• FakeXrmEasy, EasyRepro or Playwright.
• SSRS / FetchXML reporting, Power BI.

We Offer:

• Remote work and flexible working hours.
• Legal support.
• Paid sick leaves.
• Paid vacations.
• Medical insurance. 
• Free English classes.

We are a Ukrainian multiproduct company that creates database development and management tools, connectivity solutions, productivity tools, and data services for more than 500.000 clients from 120 countries. Among our clients, you can find such legends as Microsoft Corporation, Oracle America, IBM, Intel, and many more companies that deserve their place in the Fortune 100 and Fortune 500.

Since 1997, we have been streamlining data workflows for professionals and teams with our intuitive and efficient software products. We’re committed to enhancing our customers’ experience across the globe by minimizing data-related tasks and enabling them to focus on more inspiring goals. Whether it’s Fortune-100 companies or individuals, we provide a customer-centric approach, delivering high-quality solutions and exceptional support.

Driven by passion, we play a substantial role in shaping the future of data management.

Product that needs your engagement 

You will be at the heart of building a new generation web-based application fully powered by AI technologies. This product is envisioned as a cutting-edge tool that redefines how professionals interact with complex data and workflows. We’re not just adding AI features into an existing app — we are designing an AI-first experience from the ground up, where automation, personalization, and intelligence are embedded in every interaction. The application will combine scalability, intuitive UX, and deep AI integration to create a solution that is both technically robust and delightful to use.

Your future team of professionals 

You will join an ambitious and growing team that values collaboration, ownership, and thoughtful engineering. You will work closely with Backend and Frontend Engineers, a Product Manager, and a QA Engineer, contributing to the development of the product and helping shape its technical direction as the team continues to grow.
 

Your future challenges & opportunities

Opportunities

• Direct involvement in the launch of a new product, with real impact on architecture and technical decisions.
• Hands-on experience building DWH integrations and MCP-based AI pipelines — one of the most in-demand skill sets in 2026.
• Work at the intersection of backend engineering and AI, expanding expertise beyond traditional .NET development.
• Opportunity to define integration patterns and technical standards from the ground up, rather than maintaining legacy code.

• Exposure to the full product lifecycle: from data modeling and API design to production deployment and optimization.

   

Challenges

• Proactively learn and adopt MCP, a recently introduced standard, keeping pace with a fast-evolving ecosystem.
• Design and implement DWH integrations with careful data modeling and schema planning — early mistakes can be costly.
• Balance product launch deadlines with the need to maintain clean, scalable, and maintainable architecture under pressure.
• Work across multiple technical domains simultaneously: data pipelines, API development, and AI tool integration.

• Validate and responsibly apply AI-assisted development tools, avoiding over-reliance on generated output.

   

Impact you will make 

• Design, build, and maintain scalable back-end services and APIs using C# and the .NET ecosystem, ensuring high performance, reliability, and maintainability.
• Ensure security, performance, and reliability across server-side components by applying SOLID principles, established design patterns, and back-end best practices.
• Write clean, testable, and well-documented code that meets team coding standards and supports efficient code reviews.
• Collaborate closely with front-end developers to design and integrate RESTful or GraphQL APIs that power seamless user experiences.
• Participate in code reviews and contribute to the continuous improvement of team engineering practices and standards.
• Optimize application performance, database queries, and system throughput to handle high-load environments efficiently.

• Conduct thorough testing and debugging to deliver high-quality, production-ready software.

   

Skills we are looking for 

• At least 5 years of experience as a .NET Developer (ASP.NET Core, Entity Framework Core), preferably in a tech-focused environment.
• Higher education in Computer Science, Information Technology, or a related field (relevant certifications are a plus).
• Deep understanding of software principles: SOLID, IoC, OOP, design patterns, and client/server architecture.
• Experience designing and building RESTful APIs and microservices.
• Experience with version control using Git and collaborative workflows (branching, pull requests, reviews).
• Familiarity with authentication concepts and secure application development (OAuth2, JWT).
• Experience with relational databases and ORM tools (SQL Server, PostgreSQL, Entity Framework Core).
• Experience with testing frameworks (xUnit, NUnit, Moq).
• Knowledge of Docker/docker-compose and basic CI/CD processes.
• Performance optimization skills: profiling .NET applications, identifying bottlenecks, and improving throughput.
• Ability to effectively use AI-assisted development tools (GitHub Copilot, ChatGPT, etc.), understand their limitations, and responsibly apply them in the development workflow.

Benefits you get

• Maintain your work-life balance

Manage your own working hours with our flexible schedule

19 days of annual vacation granted on a pro-rata basis

No overtimes required

• Hybrid type of cooperation

Whether you prefer to work remotely in the comfort of your home office or from one of our 4 offices, you can still take part in increasing the world`s awareness about quality Ukrainian products from any part of the world

• Stay healthy

Medical insurance from one of the top insurance companies in Ukraine with a wide range of included services, as well as special programs for relatives; and special options for those who live abroad.

15 working days of sick leave per year — because your health is a priority.

• Grow with us

In-house English courses — increase your proficiency through our online courses and speaking clubs with a native speaker

Online learning activities — workshops, lectures, and webinars to enhance your leadership, management, and self-awareness skills

Experience exchange — we are proud of our team of professionals who gladly share their deep expertise in all kinds of fields with the rest of the team

Promotions, rotations, and transitions — when you believe your skills could benefit a different role or team.

• Stand with Ukraine!

We have an active pro-Ukrainian position, and that means we help our army, our servicemen, and their families not only through constant donations and volunteering, but also through our military leave policy, special health insurance options, and financial help

We are a perfect match if you share our values

We are professionals in our field.

We know how to turn up our professionalism to the maximum, because we are experts who enjoy solving complex tasks.

We know how to focus on the product, think big, and at the same time delve deep into the details.

We create a calm and friendly atmosphere within the company.

We value the freedom of open and transparent communications.

Radical honesty is embedded in the foundation of our culture.

We are open to new things and constantly develop and practice regular knowledge sharing, which helps us evolve continuously.

Most importantly, the company creates an environment where we can fulfill our potential upon a solid foundation.

Our Hiring Process

• Recruitment Interview
• Technical Interview
• Offer Call

We strive to ensure transparency and openness in the hiring process, and we understand the importance of providing timely feedback. If your resume meets the job requirements, we will contact you to clarify details and schedule an interview within 2 weeks after your application is submitted.

The timeframe for feedback between interview stages may take up to 2 weeks.

As a .NET Engineer you will drive the technical modernization of a large-scale system from .NET Framework 4.8 to .NET 10. Your work will span the full backend stack — replacing Windows-only dependencies, refactoring legacy patterns, migrating data access to EF Core, and ensuring every service is portable, containerizable, and ready for AWS cloud deployment. You will collaborate closely with DevOps and database engineers as part of a cross-functional Agile team delivering a phased, production-safe migration.

Responsibilities:

• Migrate a .NET Framework 4.8 application to .NET 10.
• Migrate a large database-first Entity Framework 6 model to EF Core 8 across multiple bounded contexts, one domain at a time.
• Identify and replace Windows-only libraries and assembly references that prevent building and running on Linux.
• Establish unit test coverage measurement and enforce quality gates as part of the migration pipeline.
• Collaborate with the DevOps engineer on Dockerfile authoring, environment configuration, and secrets injection.
• Participate in Agile/SCRUM processes, conduct code reviews, and document migration decisions.

Must-Have Qualifications:

• 5+ years of C# and .NET backend development with strong knowledge of ASP.NET and ASP.NET Core.
• Proven, hands-on experience migrating .NET Framework applications to .NET Core / .NET 8, 10 in production.
• Solid experience with Entity Framework Core.
• Solid knowledge of DDD, CQRS, and repository patterns in layered .NET architectures.
• Familiarity with Docker multi-stage builds and Linux container fundamentals for .NET applications.
• Proficient with xUnit and Moq for unit testing; comfortable with container-wired test setups.
• Experience with AWS ECS / Fargate and ECR for deploying containerized .NET applications.
• Familiarity with MassTransit and RabbitMQ or Amazon MQ for event-driven messaging.
• Experience with Hangfire or similar background job processing frameworks.
• Proficient in Git and familiar with Agile/SCRUM team processes.

Nice-to-Have Skills:

• Experience building CI/CD pipelines for .NET projects.
• Familiarity with micro-frontend architecture and Angular-based single-page applications.
• Experience with automated code coverage tooling and enforcing coverage thresholds in CI.
• Experience with performance optimization and scalable enterprise backend systems.

N-iX is looking for Lead .Net Engineer to join the team

Position Overview:  

As a .NET Engineer you will drive the technical modernization of a large-scale system from .NET Framework 4.8 to .NET 10. Your work will span the full backend stack — replacing Windows-only dependencies, refactoring legacy patterns, migrating data access to EF Core, and ensuring every service is portable, containerizable, and ready for AWS cloud deployment. You will collaborate closely with DevOps and database engineers as part of a cross-functional Agile team delivering a phased, production-safe migration.

Responsibilities:

• Migrate a .NET Framework 4.8 application to .NET 10.
• Migrate a large database-first Entity Framework 6 model to EF Core 8 across multiple bounded contexts, one domain at a time.
• Identify and replace Windows-only libraries and assembly references that prevent building and running on Linux.
• Establish unit test coverage measurement and enforce quality gates as part of the migration pipeline.
• Collaborate with the DevOps engineer on Dockerfile authoring, environment configuration, and secrets injection.
• Participate in Agile/SCRUM processes, conduct code reviews, and document migration decisions.

Must-Have Qualifications:

• 5+ years of C# and .NET backend development with strong knowledge of ASP.NET and ASP.NET Core.
• Proven, hands-on experience migrating .NET Framework applications to .NET Core / .NET 10 in production.
• Solid experience with Entity Framework Core.
• Solid knowledge of DDD, CQRS, and repository patterns in layered .NET architectures.
• Familiarity with Docker multi-stage builds and Linux container fundamentals for .NET applications.
• Proficient with xUnit and Moq for unit testing; comfortable with container-wired test setups.
• Experience with AWS ECS / Fargate and ECR for deploying containerized .NET applications.
• Familiarity with MassTransit and RabbitMQ or Amazon MQ for event-driven messaging.
• Experience with Hangfire or similar background job processing frameworks.
• Proficient in Git and familiar with Agile/SCRUM team processes.
• Upper-Intermediate/Advanced English level 

Nice-to-Have Skills:

• Experience building CI/CD pipelines for .NET projects.
• Familiarity with micro-frontend architecture and Angular-based single-page applications.
• Experience with automated code coverage tooling and enforcing coverage thresholds in CI.
• Experience with performance optimization and scalable enterprise backend systems.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Full Stack .NET Engineer (Voice / Telephony Platform)

We are looking for a .NET Engineer to join a product development team working on a voice communication and conversation analytics platform.

The product supports real-time voice communications, call recording and processing, and integrations with telephony providers, contact center solutions, and CRM platforms.

The role is primarily focused on backend development with C#/.NET. We are looking for an engineer with solid backend expertise who is comfortable working with APIs, integrations, databases, and real-time systems.

Experience in telephony, VoIP, WebRTC, SIP, UCaaS/CCaaS, or contact center solutions would be a strong advantage.

Tech Stack

C# / .NET 6+ · ASP.NET Core · MS SQL · REST APIs · SignalR · WebSockets · Twilio · WebRTC · Azure · React.js / TypeScript

Responsibilities

• Develop and maintain backend services using C# / .NET
• Build new functionality for voice communication and call recording
• Work with end-to-end call flows, including call initiation, routing, recording, storage, and retrieval
• Design, develop, and maintain REST APIs
• Build integrations with telephony providers, communication platforms, contact center systems, and CRMs
• Develop real-time functionality using SignalR, WebSockets, WebRTC, and Twilio
• Work with relational databases and optimize data access
• Troubleshoot issues related to call flows, third-party integrations, and real-time communications
• Improve application performance, reliability, and scalability
• Participate in technical discussions, estimations, and code reviews

• Collaborate with Product, QA, and Engineering teams throughout the development lifecycle

   

Requirements

• 3+ years of commercial software development experience
• Strong commercial experience with C# / .NET
• Good knowledge of ASP.NET Core
• Solid understanding of backend development and client-server architecture
• Experience developing and integrating REST APIs
• Experience with relational databases and SQL
• Good understanding of asynchronous programming and concurrency
• Experience working with integration-heavy and/or real-time systems
• Understanding of software architecture principles, design patterns, and clean code practices
• Experience with Git and modern development workflows

• English — B2+

   

Key Experience

• Experience with telephony, VoIP, UCaaS/CCaaS, contact center, or voice communication products
• Knowledge of SIP and RTP
• Experience with WebRTC
• Experience with call recording, audio/media processing, or real-time media streaming
• Experience with Twilio or similar communication APIs
• Experience with SignalR / WebSockets
• Integration experience with RingCentral, Microsoft Teams, Zoom, Cisco Webex, Avaya, 8x8, Genesys, Five9, or similar platforms
• Experience troubleshooting network, connectivity, or voice communication issues
• Experience with Azure
• Experience with microservices or distributed systems
• Docker and CI/CD experience
• React.js / TypeScript knowledge
• Experience with transcription, speech-to-text, conversation analytics, or AI/NLP solutions

What’s In It for You?

• Career Growth – Opportunities to develop and advance.
• Performance Reviews – Regular feedback and support.
• Work Anniversaries – Special gifts to celebrate milestones.
• Flexible Work – Hybrid or remote (Lviv office available).
• Mentorship – Guidance from experienced professionals.
• Accounting Support – We handle the paperwork.
• Paid Time Off – 18 vacation days + 5 sick days per year.
• Extra Leave – 10 additional days off annually.
• Free Office Lunches – Enjoy meals on us.
• Team Events – Gatherings, gifts, and a welcoming atmosphere.