Jobs C# / .NET

The family-style company is looking for a talented  Optimizely developer to join our team. If you are looking for an awesome team, send us your CV!

What we are looking for

Must have:

• 6+ years of commercial experience with C# / .NET
• Strong English skills — you should feel comfortable communicating with an international client and team
• Experience in migrating or upgrading solutions from Optimizely CMS 11 to CMS 13 

• We also expect you to be a really self-driven person because micromanagement and total control are not about UKAD.

   

Project technical stack:

Backend: .NET 6/7, ASP.NET Core, C#, REST API, GraphQL
Frontend: HTML / CSS / SCSS, JavaScript / TypeScript, React / Vue
Nice to have: Azure (App Services, Azure SQL, Azure Storage), Docker, CI/CD: Azure DevOps / GitHub Actions, Optimizely CMS

Our typical tasks list:

• Develop well-designed, easily maintainable, scalable, and reusable software
• Develop the solution according to existing software architecture defined by the architect
• Maintain software architecture documentation: diagrams, code samples, API descriptions, etc.
• Research, study, and develop technical solutions and technologies
• Implement performance/load/stress testing procedures according to project needs
• Enhance knowledge of preferred technologies, methodologies, standards, and policies
• Review design prototypes, participation in tech review.

What we offer:

• Remote or hybrid work
• Flexible working hours. You can start your working day between 08:00 and 11:00
• Full-time employment
• Professional development and mentoring
• Support for conferences, courses, and meetups
• Equipment provided for work
• Social benefits package
• A friendly, collaborative team with minimal bureaucracy
• Challenging technical tasks and the opportunity to work with modern development and AI tools
•  Feel free to choose technologies and solutions, in which you believe, as well as to be creative and responsible for the results.

Some facts about UKAD to help you make a decision:

During 2022-2025, we only increased cooperation with our foreign partners.

UKAD combines benefits of family-sized companies, like no bureaucracy, easy access to the executives, with sustainable growth and vast opportunities.

Our company is strong enough to be not just a vendor but a tech partner. We can afford to choose customers that respect developers

UKAD is one of the leading employers in Kharkiv, according to DOU.

Aren't we the company you're looking for?

N-iX is looking for a Tech Lead to join a long-term product development initiative. In this role, you will be involved in the entire software development lifecycle, including architecture design, system development, deployment, and maintenance of both new and existing features. You will play a key role in driving backend development, ensuring system reliability, scalability, and high code quality while mentoring team members and contributing to technical decision-making.
 

Responsibilities:

• Design, develop, maintain, and support business-critical applications using C# and .NET
• Take ownership of backend architecture and technical solutions
• Lead and mentor developers, fostering engineering excellence and best practices
• Participate in system design, code reviews, and technical discussions
• Implement and promote best practices in software development, testing, version control, and CI/CD
• Build and maintain scalable APIs and distributed systems
• Collaborate closely with cross-functional teams to ensure high-quality product delivery
• Identify opportunities for innovation and continuous improvement
   

Requirements:

• 6+ years of experience in Backend Development using C#/.NET technologies
• Strong expertise in modern .NET ecosystem and backend application development
• Solid SQL skills and hands-on experience with PostgreSQL and/or MySQL
• Strong experience designing, building, and consuming APIs, including concepts such as caching, rate limiting, queues, and performance optimization
• Experience with messaging systems and asynchronous communication patterns (RabbitMQ, Kafka, Azure Service Bus, or similar)
• Deep understanding of software design principles, design patterns, and architecture best practices
• Experience with microservices architecture
• Hands-on experience with unit testing and integration testing
• Knowledge of authentication, authorization, and application security best practices
• Experience with structured logging and observability practices
• Experience using Git and GitHub workflows
• Knowledge of MVC architecture
• Understanding of HTTP protocols and web technologies
• Basic knowledge of frontend technologies, including HTML, JavaScript, and CSS
• Strong communication and leadership skills
• Upper-Intermediate or higher level of English, both written and spoken
• Positive attitude, strong ownership mindset, and ability to work effectively within a team
• Active GitHub profile with private repositories available for review
   

Nice to Have:

• Experience with Blazor
• Knowledge of gRPC
• Experience with Angular and reactive programming principles
• Understanding of Scrum/Agile development methodologies
• Experience with Test-Driven Development (TDD)

Numerical Technologies LTD is a provider of custom software solutions and services specializing in risk, limits, and regulatory capital. We are currently looking for a Senior C#/.Net Developer to join our team. 

What you will be doing:  

As part of the team, you will be participating in a client project focused on portfolio management solutions. You will help develop new software features, as well as support and maintain existing ones. You will be writing scalable and fault-tolerant code, debugging programs, and integrating applications with third-party web services. You will collaborate closely with the client and product manager to understand the system’s functional and non-functional requirements, and contribute to code quality through unit testing, integration testing, code reviews, and system design, helping deliver robust software aligned with the client's business needs.

What we are looking for:  

• 5+ years of commercial C#/.NET development experience.
• Deep understanding of object-oriented programming and software design principles.
• Proficiency in SQL databases.
• Strong problem-solving skills and ability to collaborate effectively in a team environment.
• Upper-Intermediate level of English or above.

What will be a plus:

• Experience with the Infragistics library.
• Experience developing desktop applications using WPF.
• Experience with other WPF UI libraries (e.g. DevExpress).
• Experience working with Java and Oracle.

What we offer: 

• Competitive compensation depending on experience and skills. 
• Regular assessments and salary reviews. 
• Paid personal days. 
• Mental health support program. 
• Language classes. 
• Flexible working schedule. 

Creatio is a global vendor of an agentic CRM & workflow platform with no-code and AI at its core. We help organizations automate customer and operational workflows achieving the fastest time-to-value and the highest ROI on the market. Millions of workflows run on Creatio daily, supporting thousands of clients in over 100 countries. Genuine care for our clients and partners is at the heart of our DNA. 

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.

Who We’re Looking For:

We invite an experienced Technical Lead to join our ALM Domain for collaborating within Scrum teams. ALM Domain teams build platform-level tools and capabilities that support the full Application Lifecycle of Creatio applications. This includes development and packaging frameworks, versioning, configuration management, delivery pipelines, testing, monitoring and alerting, building and integrating CI/CD tools, and lifecycle automation for internal teams and external customers/partners. The focus is on making application development and delivery and maintenance on Creatio predictable, repeatable, and safe across environments.

Team composition: 3 Developers, 1 QA, 1 Technical Lead, 1 Agile Coach, 1 Product Owner

Responsibilities:  

• Lead the design and development of architectural solutions and prototypes alongside the system architect and development team.
• Build, test, and debug high-quality back-end and front-end code.
• Support seamless product operation by addressing customer cases and ensuring system reliability.
• Continuously monitor and optimize development processes to enhance team productivity and quality.
• Drive adoption of innovative tools, standards, and best practices in software development.
• Collaborate closely with product managers, stakeholders, and leadership to align technical vision with business goals.

• Conduct technical interviews, mentor developers, and facilitate onboarding and professional growth.

   

Requirements: 

• Minimum 6 years of software development experience with full-stack expertise in .NET and Angular.
• At least 1 year in a technical lead or team lead role, guiding teams successfully.
• Strong mastery of object-oriented programming and solid application of KISS, SOLID, and DRY principles.
• Proficient in C# and modern .NET runtime environments (.NET 6+), including ASP.NET MVC, Core, and Web API development.
• Hands-on experience with microservices, containerization, Kubernetes, and Helm for orchestration.
• Deep knowledge of Angular 15+ with ability to build new components and optimize existing ones in a monorepo using RXJS and pipeline operators.
• Skilled in JavaScript, TypeScript, DOM manipulation, CSS/SASS, and UI styling per design specifications.
• Experience using Git and SVN with workflows involving branching, merging, and rebasing.
• Strong unit testing background including NUnit, mocking frameworks, and API testing with Postman.
• English proficiency at Upper-Intermediate level or above, both spoken and written.

What to expect from us: 

• Growth & Development: Clear career paths, mentorship opportunities, and access to continuous learning to help you reach your full potential.
• Flexibility & Well-Being: We provide flexible work arrangements and initiatives that empower you to manage your schedule effectively, stay productive, and thrive both personally and professionally.
• Recognition & Impact: A culture that celebrates achievements, values your ideas, and empowers you to make real contributions from day one.
• Innovative Culture: Be part of a company that embraces new ideas, modern technologies, and bold thinking to stay ahead of the curve.
• Benefits & Rewards Package: We provide competitive compensation and benefits designed to support you and your family. Our rewards approach goes beyond salary, recognizing your contributions and commitment. The exact package may vary depending on your country of residence and employment type. 

Creatio is an AI CRM and workflow platform where people and AI agents work together — with no limits on users, agents, or scale. We help midsize and large organizations run customer workflows in the AI era. With a global team and a large ecosystem of partners, Creatio serves thousands of customers in over 100 countries and automates tens of millions of workflows daily. Genuine care for our clients and partners is at the heart of our DNA.

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.

Who We're Looking For:

We are seeking a passionate, proactive, and results-driven .NET Technical Lead (Marketing area) who is excited to contribute to a fast-growing and innovative company. 

Here, the teams develop the Creatio Agentic Marketing Platform as an end-to-end, enterprise-level marketing automation product that enables intelligent, personalized engagement across the entire customer journey.

Creatio Marketing is developed as an AI-native platform, using intelligent automation and AI agents to generate, personalize, and optimize content for every segment, channel, and touchpoint - from first interaction to sales handoff.

Team composition: 1 Technical Lead, 3 Developers, 1 QA, 1 Agile Coach, 1 Product Owner

Responsibilities:

• Lead the design and development of architectural solutions and prototypes alongside the system architect and development team.
• Build, test, and debug high-quality back-end and front-end code.
• Support seamless product operation by addressing customer cases and ensuring system reliability.
• Continuously monitor and optimize development processes to enhance team productivity and quality.
• Drive adoption of innovative tools, standards, and best practices in software development.
• Collaborate closely with product managers, stakeholders, and leadership to align technical vision with business goals.
• Conduct technical interviews, mentor developers, and facilitate onboarding and professional growth.

Requirements:

• 6+ years of overall programming experience, strongly focusing on .Net
• At least 3+ years in a technical lead or team lead role, guiding teams successfully.
• 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, containerized services.
• 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.
• Nice to have: 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.

What to expect from us:

• Growth & Development: Clear career paths, mentorship opportunities, and access to continuous learning to help you reach your full potential.
• Flexibility & Well-Being: We provide flexible work arrangements and initiatives that empower you to manage your schedule effectively, stay productive, and thrive both personally and professionally.
• Recognition & Impact: A culture that celebrates achievements, values your ideas, and empowers you to make real contributions from day one.
• Innovative Culture: Be part of a company that embraces new ideas, modern technologies, and bold thinking to stay ahead of the curve.
• Benefits & Rewards Package: We provide competitive compensation and benefits designed to support you and your family. Our rewards approach goes beyond salary, recognizing your contributions and commitment. The exact package may vary depending on your country of residence and employment type.

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.
 

Why this role exists:

This role exists to design, develop, and maintain scalable .NET systems for the Payments Team. It ensures high performance, resilience, and alignment with business objectives while mentoring engineers and improving development practices.
 

What you’ll drive:

System design and architecture

• Designing and implementing scalable, resilient, and efficient software architectures using microservices, event-driven, and cloud-native approaches.

Development and code quality

• Writing, testing, and debugging complex code for new and existing applications.
• Conducting code reviews to ensure quality, security, and adherence to best practices.
• Delivering production-ready code in a timely manner.

Mentorship and collaboration

• Providing guidance and mentoring junior engineers and team members.
• Collaborating with cross-functional teams, including product management, design, and operations, to align development efforts with business goals.

Continuous improvement and research

• Researching and implementing new technologies and methodologies to improve software performance and processes.
• Identifying and resolving complex software issues and technical challenges.
• Driving continuous improvement in development practices.

Communication and documentation

• Creating and maintaining comprehensive technical documentation.
• Communicating effectively with stakeholders, presenting technical concepts and project updates.
   

What makes you a GR8 fit:

Must-have

• Strong experience in designing scalable and resilient .NET systems (microservices, event-driven, cloud-native).
• Advanced C# skills, RESTful API development, asynchronous programming, and mastery of design/resilience patterns (DDD, CQRS, circuit breaker, etc.).
• Proficiency in SQL optimization, data modeling, indexing, and experience with relational and NoSQL databases.
• Hands-on experience with Kafka, high-load system optimization, caching, and distributed computing.
• Solid experience with CI/CD pipelines, Docker/Kubernetes, and infrastructure automation.
• Strong focus on testing (xUnit, NUnit), monitoring (Serilog, App Insights), and secure coding practices.
• Proven experience mentoring peers and driving technical decisions in Agile teams.
• Upper-Intermediate+ English, B2+ Ukrainian/Russian.

Nice-to-have

• Experience leading or managing software development projects.
• Familiarity with cloud platforms (Azure, AWS, GCP) and cloud-native service design.
• Experience improving software development practices and SDLC processes.
   

Why you’ll love working here:

Benefits Cafeteria — annual budget you allocate to:

• Sports • Medical • Mental health • Home office • Languages.
   

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.
   

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.
 

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.

Why this role exists:

This role exists to design, develop, and maintain scalable .NET systems for the Sport Math Team. It ensures high performance, resilience, and alignment with business objectives while mentoring engineers and improving development practices.

What you’ll drive:

System design and architecture

• Designing and implementing scalable, resilient, and efficient software architectures using microservices, event-driven, and cloud-native approaches.

Development and code quality

• Writing, testing, and debugging complex code for new and existing applications.
• Conducting code reviews to ensure quality, security, and adherence to best practices.
• Delivering production-ready code in a timely manner.

Mentorship and collaboration

• Providing guidance and mentoring junior engineers and team members.
• Collaborating with cross-functional teams, including product management, design, and operations, to align development efforts with business goals.

Continuous improvement and research

• Researching and implementing new technologies and methodologies to improve software performance and processes.
• Identifying and resolving complex software issues and technical challenges.
• Driving continuous improvement in development practices.

Communication and documentation

• Creating and maintaining comprehensive technical documentation.

• Communicating effectively with stakeholders, presenting technical concepts and project updates.

   

What makes you a GR8 fit:

Must-have

• Strong experience in designing scalable and resilient .NET systems (microservices, event-driven, cloud-native).
• Advanced C# skills, RESTful API development, asynchronous programming, and mastery of design/resilience patterns (DDD, CQRS, circuit breaker, etc.).
• Proficiency in SQL optimization, data modeling, indexing, and experience with relational and NoSQL databases.
• Hands-on experience with Kafka, high-load system optimization, caching, and distributed computing.
• Solid experience with CI/CD pipelines, Docker/Kubernetes, and infrastructure automation.
• Strong focus on testing (xUnit, NUnit), monitoring (Serilog, App Insights), and secure coding practices.
• Proven experience mentoring peers and driving technical decisions in Agile teams.
• Upper-Intermediate+ English, B2+ Ukrainian/Russian.

Nice-to-have

• Experience leading or managing software development projects.
• Familiarity with cloud platforms (Azure, AWS, GCP) and cloud-native service design.

• Experience improving software development practices and SDLC processes.

   

Why you’ll love working here:

Benefits Cafeteria — annual budget you allocate to:

• Sports • Medical • Mental health • Home office • Languages.

   

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).

• Learning culture with internal courses + growth programs.

   

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

Workload: Full-time (160 hours/month)
Duration: 3–6 months
Location: Remote
Language: Ukrainian — Upper Intermediate
Start: ASAP
 

Requirements

• Senior-level commercial experience with .NET development.
• Strong expertise in C#.
• Experience developing, maintaining, and optimizing applications using the .NET ecosystem.
• Strong understanding of software architecture, OOP, SOLID principles, and design patterns.
• Ability to work independently and collaborate with a development team.

Responsibilities

• Develop and maintain applications using .NET and C#.
• Write clean, maintainable, and efficient code.
• Participate in technical discussions and code reviews.
• Troubleshoot and resolve technical issues.
• Collaborate with the team to deliver project requirements.

As our Senior AI Engineer, you'll own the intelligence layer of the platform — the gateway, tools, retrieval, and evaluation that let an AI assistant read and act inside a regulated ERP as the signed-in user, and never as anything more. In manufacturing that answers to auditors, an assistant that's confidently wrong, or that touches a record it shouldn't, is worse than no assistant at all. Your work is making AI trustworthy enough to put in front of a quality manager.

This isn't a role for working through a queue of well-specified tickets.

 You'll take large features from a loose problem statement to production — agentic workflows, AI on mobile for the shop floor, and the system and infrastructure changes underneath them. You'll decide what to build as much as how, and you'll push for the breakthrough features that make customers switch, not only the ones already on the roadmap.

The ideal candidate thrives in startup ambiguity, moves with real urgency, and has a track record of turning open-ended problems into shipped products without waiting to be told what's next.

What You'll Do

01 — Take large features from idea to production.

Own agentic workflows and AI on mobile end to end. Start from the user's problem, shape the solution, write the plan and the tickets, build the React and mobile interfaces that make AI output trustworthy and actionable, ship it, and measure whether it worked.

02 — Make and own large system changes.

Propose, defend, and carry through the architecture and infrastructure the AI layer depends on — background agents and job queues, observability, cost metering, per-tenant limits, and model version pinning.

Required Qualifications

- 8+ years building and shipping production software, including 2+ years shipping LLM-powered features to real users, and a track record of owning large features end to end.

- AI-native engineering practice — you've rebuilt how you work around agents rather than adding them to an old workflow. Claude Cowork as your primary tool, with strong hands-on experience using Claude Code, Cursor, Codex, or similar; you direct agents through most of the implementation and stay disciplined about the quality, stability, and extensibility of what they produce.

- Product sense and ownership — you work from problems, not specs. You figure out what users and the business actually need, write your own tickets, make the call when the answer isn't obvious, and drive work to done without needing direction repeated.

- Production LLM application engineering — tool calling, structured output, prompt and context design, and streaming, with Claude, OpenAI, or similar, via AWS Bedrock or direct APIs.

- Retrieval-augmented generation in production — chunking, embeddings, and hybrid search on pgvector or equivalent, with access control enforced at retrieval time.

- Evaluation and AI security discipline — you've built eval suites that gate releases, and you design against prompt injection, data leakage through tool output, and cross-tenant access from the start.

- Strong TypeScript, React, and Next.js in production — enough to own the AI experience end to end rather than hand it off.

- Production experience with PostgreSQL — schema design, query optimization, and operating it at scale.

- Hands-on with AWS services — Bedrock, RDS, Fargate, S3, VPCs, IoT Core, DynamoDB, and related infrastructure.

- Disciplined engineering fundamentals — SOLID, DRY, and Domain-Driven Design applied to complex business domains, with unit and integration tests as part of your normal workflow.

- B.S. in Computer Science, Mathematics, Physics, Engineering, or equivalent practical experience.

Preferred Qualifications

- Early-stage startup experience — you've shipped at weekly cadence, owned outcomes rather than tasks, and built something new that changed what the product could do.

- Shipped mobile applications — React Native or similar — for field, operator, or shop-floor use.

- Experience building manufacturing software or Industrial IoT systems — ERP, MES, or SCADA platforms, or machine connectivity over MQTT, OPC-UA, or similar.

- Hands-on with the Model Context Protocol — MCP servers or clients, and OAuth 2.1 authorization for agents.

- C# / .NET experience, as our core services move to a C# and AWS architecture.

- Exposure to compliance frameworks such as SOC 2, GAMP 5, ISO 13485, 21 CFR Part 11, or similar.

Readiness to work from 16:00 till 01:00 in order to have an optimal overlap of work hours with USA based teams.

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

About the Role 

We are looking for a .NET Backend Developer to join our team!  

We're building a large-scale, enterprise-grade web platform on a modular microservice architecture. As a backend engineer, you'll own the full lifecycle of domain services — from data modelling and business logic through API design, messaging contracts, database migrations, and production deployment.

You'll work in a multi-vendor setup alongside DevOps, architecture, and product teams.

Responsibilities: 

• Design, build, test, and operate microservices following a read/write service-pair pattern (read-only delivery APIs + write-capable update/ingestion services)
• Implement event-driven communication between services
• Own your domain end-to-end: schema design, API contracts, persistence, messaging, and production monitoring
• Contribute to shared platform libraries and tooling
• Document architectural decisions and service designs for both technical and non-technical stakeholders

Required Technical Skills and Experience

• C# / .NET 8 / .NET Framework 4.7 – Web API development, modern C# features (records, pattern matching, nullable reference types, async/await best practices), experienced in both worlds
• Entity Framework Core - code-first migrations, specification pattern, repository abstraction
• Microservice architecture - clear separation of concerns across layered services (controller → service → repository)
• Event-driven messaging - publishing and consuming messages on a service bus (MassTransit, NServiceBus, or similar), contract-first design, idempotency
• Entity Framework Core - code-first migrations, specification pattern, repository abstraction
• Authentication & Authorization - JWT validation, Azure AD / Entra ID, OIDC
• Third-party API integrations (DAM systems, CRM/marketing platforms, email dispatch)

Nice to have:

• Event-driven messaging - publishing and consuming messages on a service bus (MassTransit, NServiceBus, or similar), contract-first design, idempotency
• Azure - AKS (Kubernetes), Azure SQL, Blob Storage, Table Storage, Key Vault, Managed Identity, Azure Functions (isolated worker model), Azure AI Search
• Experience with CDN cache invalidation (e.g. Akamai FastPurge API)
• Redis caching strategies
• Roslyn Analyzers / Code Fix Providers
• PDF generation libraries

Other Requirements

• Fluent German skills strongly preferred
• Experience working in a client-facing role, interacting with both technical and non-technical stake-holders
• Experience working in agile, multi-vendor environments
• Must be fluent in English, written and verbal communications

About the Role 

We are looking for a Senior .NET Backend Developer to join our team!  
We're building a large-scale, enterprise-grade web platform on a modular microservice architecture. As a backend engineer, you'll own the full lifecycle of domain services — from data modelling and business logic through API design, messaging contracts, database migrations, and production deployment.

You'll work in a multi-vendor setup alongside DevOps, architecture, and product teams.

Responsibilities: 

• Design, build, test, and operate microservices following a read/write service-pair pattern (read-only delivery APIs + write-capable update/ingestion services)
• Implement event-driven communication between services
• Own your domain end-to-end: schema design, API contracts, persistence, messaging, and production monitoring
• Contribute to shared platform libraries and tooling
• Document architectural decisions and service designs for both technical and non-technical stakeholders

Required Technical Skills and Experience

• C# / .NET 8 / .NET Framework 4.7 – Web API development, modern C# features (records, pattern matching, nullable reference types, async/await best practices), experienced in both worlds
• Extensive experience with MS SQL, a solid understanding of the principles of relational databases, and proficiency in SQL/T-SQL
• Entity Framework Core - code-first migrations, specification pattern, repository abstraction
• Microservice architecture - clear separation of concerns across layered services (controller → service → repository)
• Event-driven messaging - publishing and consuming messages on a service bus (MassTransit, NServiceBus, or similar), contract-first design, idempotency
• Entity Framework Core - code-first migrations, specification pattern, repository abstraction
• Authentication & Authorization - JWT validation, Azure AD / Entra ID, OIDC
• Third-party API integrations (DAM systems, CRM/marketing platforms, email dispatch)
• Ownership across large functional areas
• Ability to guide and mentor less experienced team members

Nice to have:

• Azure - AKS (Kubernetes), Azure SQL, Blob Storage, Table Storage, Key Vault, Managed Identity, Azure Functions (isolated worker model), Azure AI Search
• Experience with CDN cache invalidation (e.g. Akamai FastPurge API)
• Redis caching strategies
• Roslyn Analyzers / Code Fix Providers
• PDF generation libraries

Other Requirements

• Fluent German skills strongly preferred
• Experience working in a client-facing role, interacting with both technical and non-technical stake-holders
• Experience working in agile, multi-vendor environments
• Must be fluent in English, written and verbal communications

Location:  Hybrid, Lviv 
Type: Full-time
Experience: 0,5+ years
English: Upper-Intermediate

We’re looking for a talented Full Stack Developer to join a long-term project focused on building an intelligent call center solution. The platform helps businesses manage high volumes of customer communication efficiently — including real-time dashboards, smart call routing, CRM integration, and VoIP services.

This is a hands-on development role where your ideas will matter — the client is open to improvements and values technical input.

Tech Stack:

• Backend: .NET 6+, C#
• Frontend: React.js, TypeScript
• Database: MS SQL
• Integrations: Twilio, WebRTC, SignalR

• Cloud: Azure (optional)

   

What You'll Do:

• Build new features and maintain existing functionality
• Integrate telephony and CRM systems via APIs
• Optimize application performance and scalability
• Participate in technical discussions, estimations, and code reviews

• Work closely with the product owner and distributed team

   

Requirements:

• 0.5+ years of experience with .NET (C#) and React.js
• Strong understanding of web architecture and client-server communication
• Experience with REST APIs, relational databases, and version control systems
• Good spoken and written English (B2 level or confident B1+)

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.

We are looking for 2–3 Senior C#/.NET Developers (2–3 FTE) to join a project for a client from Finland, focused on the development of Loyalty APIs.

📍 Work model: 100% Remote

🌍 Eligible location: Poland (candidates must be based in Poland)

🗣️ Language: English C1

📅 Start date: ASAP

👥 Team size: 2–3 FTE

🔹 Responsibilities:

Develop and maintain backend APIs using C# and .NET

Build and maintain serverless solutions using Azure Functions

Work with Azure Cosmos DB as the primary NoSQL database

Develop and integrate cloud-based services

Contribute to event-driven architecture and messaging solutions

Collaborate with the team on API development and system integrations

🔹 Requirements:

Strong experience with C#

Solid experience with .NET Core / .NET 6/8

Hands-on experience with Azure Functions

Strong knowledge of Azure Cosmos DB

Good understanding of backend development and API architecture

English C1

🔹 Tech Stack:

C#, .NET 6/8, Azure Functions, Azure API Management, Azure Cosmos DB, Azure Storage, Azure Event Hub, Azure Service Bus, Azure Key Vault, Azure Active Directory, Azure Data Factory.

Additional technologies in the project ecosystem: Node.js, Express.js, TypeScript, React.js, Next.js, Redux, JWT, OIDC, Contentful.

Blackthorn Vision is looking for a Middle/Middle Strong .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:

• 4+ 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 both SQL and 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.
• English level: Upper-Intermediate.

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 strong product mindset.
• 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).