Jobs C# / .NET

Job Title: 
Senior Windows Software Engineer (C# / .NET)
 

About the Role & Product: 
Adaptiq is looking for a Senior Windows Engineer to join an international product team developing a mature commercial enterprise platform. You will work on a substantial codebase, driving features from investigation through implementation to production support, while optimizing system performance and modernizing core components.
 

Key Responsibilities:

• Develop and maintain Windows-based software primarily using C#/.NET.
• Investigate complex issues, debug, and optimize software performance across a mature codebase.
• Work with legacy components, including C++ code when necessary.
• Take end-to-end technical ownership of feature delivery and problem resolution.
• Use AI-assisted development tools (Copilot, Cursor, etc.) in your daily engineering workflow.
   

Required Skills:

• 6+ years of professional software engineering experience with strong expertise in C#/.NET.
• Proven track record in developing and maintaining Windows-based desktop/system software.
• Strong debugging, performance profiling, and problem-solving skills in complex codebases.
• Readiness to read, debug, and modify existing C++ code.
• Practical experience with modern AI coding tools.
• Upper-Intermediate English level (or higher) with strong communication skills.
   

Nice to Have:

• Experience developing endpoint agents, background services (Windows Services), or long-running software.
• Hands-on C++ development experience.
• Background in virtualized desktop environments (VDI).
   

We Offer:

• 100% Fully Remote work model + hardware/coworking support.
• 20 business days of paid vacation + national holidays.
• Full legal and B2B accounting support in Poland.

Job Title:

Senior Windows Engineer
 

About the Role: 
Join an international product team working on a mature, large-scale enterprise platform. You will take full ownership of feature development, performance optimization, and gradual code modernization.
 

Key Responsibilities:

• Develop and optimize Windows software using C# / .NET.
• Debug, profile, and fix performance issues in a large codebase.
• Work with existing C++ components when required.
• Use AI coding tools daily (Cursor, Copilot, etc.).
   

Requirements:

• 6+ years of commercial experience in C# / .NET.
• Strong background in Windows software/services development.
• Hands-on debugging & performance profiling skills.
• Ability to read/modify C++ code.
• B2+ English.
   

Nice to Have:

• Experience with endpoint agents, Windows Services, or VDI.
   

We Offer:

• Fully remote work model + powerful workstation.
• 20 paid vacation days + holidays.
• B2B accounting support in Poland.

About the Company

Digis is a European IT company, part of Fiverr (NYSE: FVRR), with 250+ specialists delivering high-load SaaS platforms, enterprise solutions, and cloud-native products worldwide. We build long-term engineering teams and ensure transparency, stability, and professional growth for every talent.

About the Project

An established international technology platform that processes large volumes of real-time data and transforms complex information into intuitive, high-performance desktop applications.
The product is actively evolving, with new features, advanced visualization capabilities, and integrations being continuously introduced. We are looking for a C# Developer who enjoys building sophisticated desktop interfaces and solving challenging UI performance problems.
This is an opportunity to take ownership of desktop UI development, influence product decisions, and work closely with the CTO and experienced engineers on a mature, actively growing product.

Responsibilities

• Develop and enhance high-performance desktop applications using C#.
• Develop and implement intuitive, responsive desktop interfaces.
• Build interactive dashboards and advanced real-time data visualizations.
• Integrate live data streams and optimize UI performance.
• Collaborate with the engineering team to develop new features and improve the user experience.

Requirements

• 3+ years of C#/.NET development experience.
• 1+ year of WPF desktop development experience.
• Hands-on experience with real-time data visualization or dynamic UI development.
• English: B2 level or higher.

What We Offer

• Work on an established international product with complex technical challenges.
• Take ownership of desktop UI development and influence product decisions.
• Gain hands-on experience with real-time data processing and advanced visualization.
• Collaborate directly with the CTO and experienced engineers.
• Fully remote work with flexible working hours.
• Long-term cooperation and professional growth.
• Competitive compensation and benefits.

We welcome applications from candidates who believe their experience and skills could bring value to our team.

About Leadature

Leadature is a B2B event-technology platform that has operated since 2008, with Fortune 500 clients and a 17-year track record. We run on-site intelligence for live events: badge scanning, lead capture and retrieval, session and booth tracking, badge printing, RFID, AI enrichment, and post-event reporting. We serve both sides of an event – the organizer running the show and the exhibitors on the floor.

We are a small, senior, fully distributed team. Decisions are fast, and we work dynamically.

Why this role exists

Our platform works, and it delivers for enterprise clients and SMBs, and has done for years. Over time, it inherited a lot of per-client customisations; product direction is currently split across several owners, which means we build reactively and our roadmap is decided by whichever event is next.

We are deciding now how much of it to modernise and how much to rebuild. Whoever takes this role will be one of a small number of people who genuinely understand how the product works – and central to what we build next.

If you like inheriting a real system with real clients on it, and turning manual work into product, this is that job. If you want greenfield only, it isn't.

What you will do

Support our clients

• Be the technical voice in client conversations, alongside customer success and sales
• Own client technical issues end to end — troubleshooting, data exports, configuration questions — with a client waiting
• Run and improve the enrichment delivery for client events
• Support live events. Events do not respect office hours, and during a show you will be reachable and responsive
• Travel to a small number of client events a year to see the product in the environment it runs in

Build and customise

• Ship the customisations enterprise clients ask for, hands-on
• Stand up client registration and event pages quickly – we are comfortable with AI-assisted development where it gets a working thing in front of a client faster
• Look for the places where AI removes manual work altogether — our enrichment pipeline, badge data cleanup, and reporting are all still done by hand and should not be
• Improve the enrichment pipeline, which we currently run largely by hand

Make the knowledge transferable

• Document how the platform works – campaign structures, data models, integrations, exports
• Replace tribal knowledge with automation, tooling and sane technical governance
• Get us to a point where we can add engineers without a two-month ramp

Support clients directly

• Be the technical voice in client conversations, alongside our customer success and sales team
• Support live events. Events do not respect office hours, and during a show you will be reachable and responsive
• Occasionally travel to client events to see the product in the environment it runs in

Your first 90 days

This is real work waiting, not an onboarding exercise.

1. Document the campaign architecture – how primary, lookup and vertical campaigns interconnect
2. Produce a field dictionary for our event data exports, so anyone can pull a clean file
3. Take ownership of our platform integrations and move them onto proper service accounts
4. Come back with a prioritised product roadmap and tell us what you would change first

What we are looking for

Must have

• Strong .NET / C# engineering, and no fear of a legacy codebase. Our platform is an older ASP.NET application – you should be able to read it, ship into it, and say honestly what is load-bearing and what should be replaced
• Fluent in a modern stack too, because that is where we are heading: current .NET (8 or later) with ASP.NET Core, Entity Framework Core, SQL Server or PostgreSQL, React with TypeScript, and containerised deploys with CI/CD. You don't need every one of these, but you should have built and shipped on a current stack recently – not only maintained an old one
• Excellent written English, and comfort being in front of enterprise clients
• Willingness to be available during live events, including outside normal hours
• Genuine AI proficiency, not curiosity. You use coding assistants and agentic tools daily and have opinions about which ones earn their place. You have used LLMs on real data work
• Self-direction. Nobody here will manage your calendar

Nice to have

• Event technology, ticketing, registration, or conference-tech background. This is a genuine advantage, and we will weight it heavily
• Experience with badge and registration APIs generally
• Data work: reporting, enrichment, moving messy data between systems
• Having built something with an LLM in the product itself, not just in your own workflow

Working setup

• Fully remote. We work across US and European hours
• Contract engagement to start, with scope for it to grow as the platform does
• A few events a year might involve travel, fully covered

How we hire

1. Short screening call
2. Technical conversation with one of our senior engineers
3. Test task / a working session on a real problem from our backlog
4. Final conversation with our CEO

We’re looking for a .NET Engineer to join a product team developing a platform for voice communications and Microsoft Teams integrations.

You’ll work primarily on the backend, building services that support Teams calls, meetings, recordings, and communication data. A key part of the role is integrating the product with Microsoft Teams and ensuring these integrations remain stable and reliable in production.

What you’ll do

• Build and enhance backend services with C#, .NET, and ASP.NET Core
• Develop integrations with Microsoft Teams
• Work extensively with Microsoft Graph API and Teams communication APIs
• Implement functionality related to calls, meetings, recordings, and communication data
• Create and maintain REST APIs and integrations with external services
• Investigate and fix production issues related to Teams and voice functionality
• Help improve the platform’s performance, reliability, and scalability
• Contribute to architectural discussions and technical improvements

What we expect

• 3+ years of commercial experience with C# / .NET
• Strong experience building backend applications with ASP.NET Core
• Proven commercial experience integrating products with Microsoft Teams
• Hands-on knowledge of Microsoft Graph API
• Experience with Teams calls, meetings, recordings, or communication APIs
• Experience building integrations with third-party systems and APIs
• Solid understanding of SQL, databases, and backend architecture
• Ability to troubleshoot and solve technical issues independently

• English — B2+

   

Good to have

• Microsoft Graph Communications / Calls & Meetings APIs
• Experience with Teams compliance recording or call-recording solutions
• Previous work with VoIP, telephony, voice, or contact center products
• Knowledge of real-time audio or media processing
• WebRTC, SIP, RTP
• SignalR / WebSockets
• Azure

You’re a backend-oriented .NET Engineer who has already worked with Microsoft Teams integrations in a commercial environment and understands the challenges of communication-focused products.

Beyond strong .NET skills, we’re looking for someone familiar with the practical side of calls, meetings, recordings, and voice integrations, including supporting and troubleshooting them in production.

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.

.NET Engineer | Microsoft Teams & Voice Communications

We are looking for a .NET Engineer to join our product team working on a voice communication platform with deep Microsoft Teams integration.

This role is focused on backend development and communication-related functionality, including calls, meetings, recordings, and communication data. You will work with Microsoft Teams and Microsoft Graph APIs, develop new features, maintain existing integrations, and troubleshoot production issues.

We are looking for an engineer with commercial experience in Microsoft Teams integrations and a good understanding of how communication and voice functionality works in real-world products.

What you’ll do

• Develop, maintain, and optimize backend services using C#, .NET, and ASP.NET Core.
• Design and support integrations with Microsoft Teams, Microsoft Graph API, and Teams communication APIs.
• Build and enhance functionality for calls, meetings, recordings, and communication data.
• Design, develop, and maintain Microsoft Teams bots hosted on Azure, including real-time activity processing and notifications.
• Implement and improve Teams activity feed notifications using Microsoft Graph API.
• Develop and maintain REST APIs and third-party integrations.
• Deploy, configure, and manage bots and backend services on Azure (Bot Service, App Service, AKS).
• Configure bot authentication, authorization, and permissions using Microsoft Entra ID (Azure AD).
• Troubleshoot production issues, monitor system performance, and ensure service reliability.
• Improve the performance, stability, and scalability of the platform.

• Collaborate with the team on technical solutions, architecture, and continuous platform improvements.

   

What we’re looking for

• 3+ years of commercial experience with C# / .NET
• Strong experience with ASP.NET Core
• Commercial experience with Microsoft Teams integrations
• Hands-on experience with Microsoft Graph API
• Experience with Teams calls, meetings, recordings, or communication APIs
• Experience building REST APIs and integrations with external services
• Good knowledge of SQL and relational databases
• Solid understanding of backend architecture and integration patterns
• Experience troubleshooting production issues
• Ability to work independently and take ownership of technical tasks

• English — B2+

   

Experience that will be highly relevant

For this role, we are particularly interested in experience with:

• Microsoft Graph Communications API
• Microsoft Teams Calls & Meetings APIs
• Teams compliance recording or call-recording solutions
• VoIP and telephony systems
• Voice communication or contact center products
• Real-time audio or media processing
• WebRTC
• SIP / RTP
• SignalR / WebSockets

• Azure

   

What we offer

• Flexible work format — remote or hybrid, with an office in Lviv
• 18 paid vacation days + 5 sick days
• 10 additional days off per year
• Regular performance reviews and feedback
• Professional growth and development opportunities
• Mentorship and support from experienced colleagues
• Accounting support
• Free lunches at the office
• Team events and company gifts

• Anniversary gifts

   

If you have strong .NET backend experience and have worked hands-on with Microsoft Teams, Microsoft Graph, calls, meetings, recordings, VoIP, or voice communication systems, we’d be happy to hear from you.

Solead Software is looking for an experienced .NET AI engineer to join our growing team to extend our custom software platform for information management industry with modern AI capabilities.

The primary goal is to make information management services more efficient and reduce manual work by means of introducing AI automation. The existing software platform is built on MS .NET and SQL Server technologies, using Azure services and integrations with multiple third-party systems. Multiple AI assistants and agents should be added into existing architecture via MS Agent Framework and Azure AI Foundry. The first practical tasks will be in building an AI powered PDF invoice parser and creating an AI agent for customer support via email.

Currently, Solead team consists of seven professionals split into three small subteams, and tightly collaborating with team mates in Europe and USA. Agile workflow assumes intense collaboration within the team, regular communication with project stakeholders, daily code commits and weekly releases. The entire software engineering process is based on GitLab environment with AI assistants and very high attention to code quality and documentation.

Join our amazing team and work on a large-scale project utilizing best practices and approaches in software development industry. You’ll meet great people and software professionals who will share with you valuable knowledge and expertise. You’ll be creating real software for real users, and seeing how your products help them in daily work.

This is a full-time position in Lviv, Ukraine. We combine work in our modern and spacious office with work at home.

Technology Stack

• Frontend: React, TypeScript, TanStack Query, Tailwind CSS, ASP.NET MVC, Bootstrap, jQuery, WPF, XAML
• Backend: .NET 10, C# 14, ASP.NET Core Web API, REST, Entity Framework Core, RabbitMQ, JWT Bearer Authentication, SQL Server, Microservices, Docker, Azure Cloud
• Tools: Consul, Swagger, GitLab, CI/CD, Visual Studio, Teams, MS Copilot / GitLab Duo

• AI: MS Agent Framework, Azure AI Foundry, LLM, RAG, MCP

   

Duties and Responsibilities

• Design, implementation and maintenance of various AI automation capabilities for the existing .NET based custom software platform
• Following well-established development process and practices, such as code review and documenting, code testing and merging, etc.
• Participation in Agile/Scrum workflow, iteration planning, team meetings, technical brainstorming, peer reviews, etc.
• Regular communication to other team members and project stakeholders, work progress and status reporting

• Proactive suggestions on how to improve the product, optimize workflow and enhance usability

   

Skills and Qualifications

• B.Sc. or M.Sc. degree in computer science, applied math, or similar
• 7+ years of experience in building commercial software systems
• Strong expertise in modern AI models, techniques, frameworks and engineering practices to build AI solutions and automate business workflows
• Good understanding of different LLMs, RAG and MCP technologies
• Experience in creating AI agents and assistants using MS Agent Framework and Azure AI Foundry
• .NET (Framework/Core) and C# programming skills
• Solid expertise in modern cloud technologies and software integration methods
• Git/GitLab and CI/CD working experience
• Agile/Scrum approach knowledge and practice
• High attention to details, accuracy, analytical and troubleshooting skills
• Smartness, agility and ability for quick ramp-up
• Upper-intermediate or better English communication skills (B2+)

.NET Full-Stack Engineer -  Microsoft Teams Bots & Communications
 

We’re looking for an experienced .NET Full-Stack Engineer to join a long-term product team working within the Microsoft Teams ecosystem.
 

The role is primarily backend-focused and combines Microsoft Teams bots, Microsoft Graph integrations, real-time activity processing, notifications, and communication-related functionality.
 

You’ll work on production features inside Microsoft Teams, including bot interactions, activity feeds, communication events, and integration with Microsoft 365 services.
 

What you’ll work on

• Design, develop, and maintain Microsoft Teams bots that process user and system activity in real time.
• Build and improve a real-time activity feed bot that sends timely notifications to users’ Teams activity feed through Microsoft Graph.
• Develop integrations with Microsoft Graph API, Microsoft Teams APIs, and Microsoft 365 services.
• Work with Teams-related functionality such as calls, meetings, participants, recordings, call records, notifications, and communication data.
• Build backend services for collecting, processing, and exposing Teams activity and communication data.
• Implement real-time functionality using SignalR / WebSockets where applicable.
• Set up and manage bot authentication and permissions with Microsoft Entra ID (Azure AD).
• Contribute to frontend functionality using React / Angular / TypeScript when needed.
• Troubleshoot application-level integration issues and improve reliability and performance.
   

Core stack

• C# / .NET / ASP.NET Core
• Microsoft Graph API
• Microsoft Teams APIs
• Microsoft Graph Communications / Cloud Communications APIs
• Microsoft Bot Framework / Teams bots
• Microsoft Entra ID
• SignalR / WebSockets
• SQL
• REST APIs
• React / Angular / TypeScript
   

Requirements

• 5+ years of commercial experience with C# / .NET
• Strong backend experience with ASP.NET Core
• Commercial experience with Microsoft Graph API
• Hands-on experience with Microsoft Teams integrations
• Experience developing or supporting Teams bots
• Understanding of Teams activity feed notifications, Graph permissions, authentication, and event-driven integrations
• Experience with Microsoft Entra ID / Azure AD authentication and permissions
• Experience with SQL and REST APIs
• Ability to independently deliver integrations and troubleshoot production issues
• English B2+
   

Strong advantage

• Microsoft Graph Communications / Cloud Communications APIs
• Teams calls / online meetings / call records / recordings / participants
• Real-time audio/media
• VoIP / telephony
• WebRTC
• SIP / RTP
• Direct Routing
• Azure Communication Services
• High-load or distributed systems
   

About the project

This is a long-term product, not a short-term integration project. You’ll join a stable development team with an ongoing roadmap and deep involvement in the Microsoft Teams ecosystem.

The role combines backend engineering, cloud infrastructure, Microsoft Graph integrations, Teams bot development, and real-time communication functionality.
 

What we offer

• Long-term cooperation
• Full-time engagement
• Stable US-based client
• Predictable workload
• Paid vacation and sick leave
• Professional development support
• Equipment provided
• Office lunches
• Anniversary and baby bonuses

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 looking for an AI Software Engineer to design, build, evaluate, and operate AI-powered capabilities within the Creatio platform.

You will join the AI teams building the agent platform that enables AI agents to safely perform real work in the product: call tools and APIs, read and write data, maintain context, follow permissions, and escalate to humans when needed.

The team also owns the core infrastructure for testing, monitoring, logging, observability, and cost/performance control, ensuring AI agents are reliable, scalable, secure, and production-ready.

This role combines strong software engineering expertise with hands-on AI engineering experience. You will work on enterprise-grade AI solutions, including assistants, copilots, knowledge systems, semantic search, RAG-based capabilities, and agentic workflows.

Responsibilities:

• Design and implement AI-powered product features within the Creatio platform.
• Build assistants, copilots, agentic workflows, knowledge systems, RAG, and semantic search capabilities.
• Integrate LLM providers, tools, enterprise data sources, and MCP-based solutions.
• Develop and maintain backend services using C# and .NET.
• Build evaluation frameworks, quality gates, and observability practices for AI solutions.
• Monitor and improve the quality, latency, cost, reliability, and security of AI capabilities.
• Apply AI coding assistants and engineering agents as part of the daily development workflow.

Requirements:

• Strong experience with C# and .NET.
• Hands-on experience with LLMs, prompt engineering, function calling, and structured outputs.
• Understanding of agent architectures, MCP, RAG, embeddings, vector search, and semantic search.
• Experience with AI evaluation, observability, security, and Responsible AI practices.
• Solid understanding of API design, distributed systems, and software architecture.
• Experience with SQL databases, testing, CI/CD, and cloud-native development.
• DevOps fundamentals, including Docker containerization and basic Kubernetes knowledge.
• Strong knowledge of engineering best practices and production-grade software development.

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.

We are looking for an experienced Senior .NET Developer to join our engineering team and help build a modern FinTech platform. You'll play a key role in designing scalable solutions, driving technical decisions, and mentoring other developers.

Responsibilities:

- Design, develop, and maintain scalable backend applications.

- Build and optimize high-performance APIs and services.

- Contribute to system architecture and technical strategy.

- Conduct code reviews and mentor team members.

- Collaborate with Product, QA, and DevOps teams.

- Ensure high code quality and system reliability.

Requirements:

- 5+ years of commercial experience with C#/.NET.

- Strong expertise in .NET Core / .NET 8 and ASP.NET Core.

- Extensive experience designing REST APIs.

- Strong knowledge of SQL and database optimization.

- Experience with Entity Framework Core.

- Solid understanding of microservice architecture.

- Hands-on experience with Docker and Kubernetes.

- Experience with Azure or AWS.

- Deep understanding of OOP, SOLID, and design patterns.

- Upper-Intermediate English or higher.

Nice to Have:

- Experience with message brokers (RabbitMQ, Kafka, Azure Service Bus).

- Experience with Redis.

- Background in FinTech, banking, or payment systems.

- Experience mentoring developers and leading technical initiatives.

We are looking for a  Senior/Str Middle .Net developer to join a product engineering team and work on the modernization and scalability of a large-scale backend platform.

You’ll be working with distributed systems, event-driven architecture, microservices, and real-time data processing, helping migrate legacy components to modern, cloud-ready services.

What you’ll do

• Develop and maintain containerized .NET Core microservices.
• Build event-driven communication and streaming flows using Kafka, RabbitMQ, and MassTransit.
• Design scalable solutions together with product and engineering teams.
• Drive migration from legacy .NET Framework and MSMQ components to modern services.
• Work with both relational and NoSQL databases.
• Participate in architecture and design reviews.
• Apply Domain-Driven Design and clean code principles.
• Improve system reliability, scalability, and performance.

• Mentor less experienced engineers and contribute to engineering best practices.

   

What we’re looking for

• 5 - 8+ years of backend development experience.
• Strong commercial experience with C# and .NET Core/.NET Framework.
• Kafka and RabbitMQ — mandatory.
• Solid understanding of microservices, distributed systems, and event-driven architecture.
• Experience with MSSQL, PostgreSQL, MongoDB, and Redis.
• Experience designing and working with APIs.
• Understanding of security practices such as OAuth2, JWT, and secrets management.
• Strong debugging, profiling, and performance optimization skills.
• Experience with testing, clean code, and continuous improvement.
• Strong communication skills and a proactive approach.

• Ability and willingness to mentor other developers.

   

Nice to have

• AWS — ECS/EKS, Lambda, RDS, S3, CloudWatch.
• MassTransit or similar orchestration libraries.
• Experience with infrastructure and cloud-native systems.
• MSMQ and legacy system migration experience.
• CI/CD, Docker, and Infrastructure as Code.
• JavaScript/React for cross-layer collaboration.

We're seeking a talented .NET Developer to help shape the future of blockchain technology in innovative startup. If you're ready to make a real impact in a cutting-edge industry, we'd love to hear from you!
 

Core Competence:
 

• At least 2 years of professional experience in software development with a strong foundation in C#, ASP.NET Core, and Entity Framework.
• Proficiency in managing IIS, MS SQL, Visual Studio, and Docker environments.
• Familiarity with ODBC, LINQ, NUnit, xUnit, NuGet, and RESTful APIs, alongside Git for version control.
• Sound understanding of client-side and server-side architectures.
• Strong analytical thinking, with a structured, math or engineering-oriented mindset and a focus on delivering results.
   

Preferred Qualifications:
 

• Knowledge of ReSharper, experience with Azure, and familiarity with NoSQL databases.
• Experience with AWS and Linux system administration is an asset.
• Active participation in hackathons demonstrates innovative thinking and problem-solving skills.
• Upper-intermediate level of English for clear and effective communication in a global team.
   

What We Offer You:
 

• Competitive Compensation: Your skills and experience will be rewarded with a salary aligned with industry standards and your career ambitions.
• Innovative Work Environment: Be part of a forward-thinking FinTech startup with a culture of continuous learning, including tech talks and participation in hackathons.

• 20 paid vacation days, 3 paid sick days, and a flexible schedule for work-life balance.

   

We are looking for a .NET WPF Engineer to take full technical ownership of a Windows desktop application within a well-established software product.

Our customer is one of the world’s top 10 leading software publishers, and the product competes with well-known global brands.

This is an autonomous role for an engineer who is comfortable taking responsibility for an existing application, making technical decisions, developing new functionality, improving architecture, and maintaining the product’s stability and performance.

You will have significant ownership over the application and will be expected to independently drive development from requirements through implementation and delivery.

Responsibilities

• Take full technical ownership of the assigned Windows desktop application
• Design, develop, maintain, and improve WPF/.NET applications
• Independently analyze requirements and translate them into effective technical solutions
• Make technical decisions related to application architecture and development
• Work with MVVM, Prism, and Dependency Injection
• Develop new features and improve existing functionality
• Take ownership of existing and legacy components, identifying areas for refactoring and improvement
• Integrate the desktop application with backend services and REST APIs
• Investigate and resolve complex technical issues, bugs, and performance problems
• Ensure application stability, performance, and maintainability
• Take responsibility for the technical quality and delivery of your work

Requirements

• 4+ years of commercial software development experience
• Strong hands-on experience with .NET
• Strong expertise in WPF
• Solid understanding and practical experience with MVVM
• Experience working with Prism and Dependency Injection
• Strong knowledge of SOLID, Clean Code, and design patterns
• Good understanding of async/await, multithreading, and concurrency
• Strong debugging and problem-solving skills
• Experience integrating desktop applications with REST APIs and backend services
• Experience working with existing/legacy codebases and improving them
• Ability to work independently and take ownership of technical decisions
• English — B2 or higher

We Offer

• Competitive compensation
• Flexible working hours
• Remote / Office / Hybrid work options
• Technical equipment
• Professional development and Performance Appraisals
• English courses
• Health Insurance
• Online courses
• Corporate events, tech talks, and more

Deep backend expertise is required.

Core Tech Stack & Architecture

• Primary Language / Backend (90%): C# / .NET Core (Senior level)
• Architecture: Headless architecture, Microservices
• Orchestration & Cloud: Kubernetes, Cloud environments
• Frontend: Vue.js (minor client-side component)

Key Backend & Engineering Requirements

• Security: Building and securing systems handling sensitive and enterprise data.
• System Design & Optimization: High performance, scalability, and efficiency.
• Concurrent Programming: Parallel/concurrent processing.
• Memory Management: Low-level resource and proper memory management.

AI & LLM Integration Requirements

• Platforms & Tools: Amazon Bedrock, diverse AI/LLM models.
• API & Integration: Model APIs, reading documentation, and integrating new AI models.
• Operations & Cost Management: Prompts, tokens, token usage tracking, and cost optimization.
• Model Selection: Evaluating and selecting appropriate AI models based on task requirements.
• Mindset: Strong capacity and enthusiasm to learn new AI areas rapidly (deep AI expertise is secondary to strong C#/.NET foundations).

.NET Full-Stack Engineer & Microsoft Teams Audio & Communications

We’re looking for an experienced .NET Full-Stack Engineer to join a long-term product development team working on communication functionality within the Microsoft Teams ecosystem.
 

This is not a short-term integration project. You’ll be joining a stable, long-term product where Microsoft Teams communication, audio, meetings, and related data are core parts of the platform.

The role is primarily backend-focused, but you’ll also contribute to frontend functionality when needed.

What you’ll be working on

You’ll develop and maintain functionality around Microsoft Teams voice and communication workflows, including:

• Teams calls and online meetings
• Audio and communication data
• Meeting participants and call-related metadata
• Recordings and communication events
• Microsoft Graph and Graph Communications integrations
• Backend services responsible for collecting, processing, and exposing communication data
• Real-time functionality and integrations with other product components
• Supporting frontend features in React 
   

Core technologies

• C# / .NET / ASP.NET Core
• Microsoft Graph API
• Microsoft Graph Communications / Cloud Communications APIs
• Microsoft Teams APIs
• Azure
• SQL
• REST APIs
• SignalR / WebSockets
• React
   

What we’re looking for

• 5+ years of commercial C#/.NET experience
• Strong backend development experience with ASP.NET Core
• Commercial experience with Microsoft Graph
• Experience with Microsoft Teams communication APIs
• Practical experience working with Teams audio, calls, meetings, recordings, participants, or call data
• Microsoft Graph Communications / Cloud Communications APIs is a must!
• Solid SQL knowledge
• Ability to work independently with integrations and production functionality
• English B2+
   

You’ll get:

• A stable product with a long-term roadmap
• Direct cooperation with a US-based client
• Predictable, long-term workload
• Transparent compensation
• Paid vacation and sick leave
• Professional development support
• High-quality equipment
• Paid office lunches
• Anniversary gifts and baby bonus
   

Full-time · Long-term cooperation · Remote/Hybrid