Jobs C# / .NET

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

Requirements:

• 2+ years of commercial software development experience.
• Strong production experience with .NET / C#.
• Strong production experience with React, TypeScript, JavaScript, HTML, and CSS.
• Experience with Redux Toolkit / RTK Query, REST APIs, and complex application state.
• 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 Azure technologies, including Azure Entra ID, Azure Storage Accounts, Azure Service Bus, and Azure Container Registry.
• Knowledge of design and architectural patterns.
• Familiarity with React Router, React Hook Form, Zod, and frontend testing.
• Understanding of authentication, permissions, accessibility, and responsive UI.
• Upper-Intermediate English.

Nice To Have:

• Experience with Kubernetes, Docker, and RabbitMQ.

Responsibilities

• Develop and maintain high-quality software solutions using .NET 10.0 and React.
• Take full ownership of delivering new features to end users, including designing architecture, implementing, testing, and onboarding the customer support team with new functionality.
• Build and maintain complex features across customer and admin portals.
• Integrate APIs and deliver reliable, tested user experiences.
• Implement access controls, feature flags, and real-time UI updates.
• Collaborate with product owners, the support team, end users, product, design, backend, and QA teams 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).

Build technology that brings travel together!

Imagine working on a platform that helps people plan and enjoy trips around the world. EasyOTA brings hotels, tours, flights and multi-day packages together in one place, supporting the full journey from availability and pricing to booking and payment.

As a Middle .NET Backend Developer, you’ll help make that experience work behind the scenes. You’ll build reliable backend features, connect the platform to travel suppliers and payment providers, and solve technical challenges that have a real impact on how travel businesses operate.

What you’ll do

• Build and maintain backend features using ASP.NET Core Web API.
• Integrate the platform with external travel suppliers and payment providers through REST and SOAP APIs.
• Design database changes and write efficient queries using EF Core, LINQ and SQL Server.
• Investigate and resolve production issues.
• Improve performance by tuning queries and working with large tables.

• Collaborate with the team to clarify requirements and make thoughtful technical decisions.

   

Must have

• 3+ years of commercial experience with C# and .NET, including .NET 8–10 and ASP.NET Core Web API.
• Strong SQL skills, including query tuning and indexing.
• Experience writing LINQ queries that EF Core can translate into efficient SQL.
• Hands-on experience with EF Core, including migrations and performance optimisation.
• Experience integrating third-party REST and SOAP APIs.
• Knowledge of unit testing with MSTest, NUnit or xUnit, and experience with mocking.
• Experience working with Azure services such as App Service, Functions and Storage.
• Familiarity with Cosmos DB.
• Experience with Git and CI/CD, preferably GitHub Actions.

• English at B2 level or higher.

   

Nice to have

• Experience with Angular and TypeScript.
• Experience in the travel industry or with travel-related platforms.

What you can look forward to

• Remote work and flexible hours 
• Competitive compensation and bonuses
• Interesting projects and an expert team 
• Room to grow 
• Regular feedback 
• Flexible vacation policy and paid sick leave.
• English and psychology classes 

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

Ever wanted to be the engineer who modernizes the core of a real business?

Not just building features - but transforming a mission-critical ERP system that runs real operations, real money, and real workflows every day?

Where your code isn’t a side experiment, but the backbone of how a company operates?
Where you don’t rewrite for the sake of rewriting - but lead a thoughtful, long-term migration from legacy Delphi to modern .NET architecture?

If you enjoy deep systems, complex business logic, and long-term ownership of a large product - this role is built for you.
 

At AlphaDevs

We don’t just build remote teams - we build long-term engineering partnerships.
We work with product companies that care about stability, quality, and long-term evolution of their systems - not quick fixes.

This role is part of a long-term product engagement focused on maintaining and gradually modernizing a large ERP platform used in real business operations.

We are committed to supporting Ukraine 🇺🇦 and are hiring Ukrainian engineers only for this role.
No strong English is required - 90% of the team is Ukrainian, and daily communication happens in Ukrainian.
 

About the Product

You will work on a large, mature ERP system that:

• Has been developed and evolved over many years
• Contains complex business logic, data flows, and integrations
• Is mission-critical for daily operations
• Is planned for gradual migration from Delphi to modern .NET (C#) architecture

This is not a greenfield project - it’s real engineering on a real system with real impact.
 

The Role

We’re looking for a Senior Developer who can take ownership of:

• Maintaining and extending an existing Delphi-based ERP system
• Deeply understanding the legacy codebase and business logic
• Driving the future migration of the system to C# / .NET
• Bringing structure, documentation, and engineering discipline to a long-living product

This is a very long-term role with growth in responsibility, technical influence, and compensation.
 

What You’ll Do

• Develop new functionality on existing ERP products
• Maintain and improve a large Delphi codebase
• Gradually participate in the migration from Delphi to .NET (C#)
• Design and implement efficient algorithms and business logic
• Work with MSSQL databases and complex data models
• Produce proper documentation and technical reporting
• Collaborate closely with Ukrainian engineering teammates
   

What You Bring

• 15+ years of professional software engineering experience
• Strong mathematical thinking and algorithmic problem-solving skills
• Solid experience with Delphi and MS SQL
• Strong knowledge of OOP and understanding of MVC concepts
• Hands-on experience with C# and Microsoft .NET technologies
• Experience with ERP systems is a strong advantage
• Excellent analytical thinking and problem-solving mindset
• Team-oriented, self-driven, and responsible engineer
   

Qualifications & Eligibility

• Computer Science degree from a strong university with high academic performance
• Strong background in algorithms and data structures
• Ability to implement efficient logical solutions in code (technical test in C#)
• Strong communication skills within a technical team
   

What You Get

• Long-Term Stability: Work on a product designed for years of development
• Real Impact: Your code directly affects business operations
• Modernization Mission: Lead the transition from legacy to modern .NET
• Growth Path: Technical growth, increasing ownership, and salary progression
• Ukrainian Team: комфортна комунікація українською мовою
• Meaningful Work: Build systems that actually run companies, not just demos
   

Ready to Modernize a System That Matters?

If you want to work on deep engineering problems, own a large ERP platform, and lead the evolution from Delphi to modern .NET - join AlphaDevs and become part of a long-term product journey.
 

👉 Apply now - build systems that real businesses rely on every day.

Ever wanted to grow as an engineer on a real product - not pet projects or short-term tasks, but a system that real businesses rely on every day?
Where you don’t just “code features”, but gradually learn how large, mission-critical systems are built, maintained, and modernized?
Where you can gain hands-on experience with legacy systems and be part of a long-term transition to modern .NET architecture?

If you’re a Junior/Middle- level C# developer with around 2 years of experience and curiosity about real-world systems - this role is a great growth opportunity.
 

At AlphaDevs

We don’t just build remote teams - we build long-term engineering partnerships.
We work with product companies that value stability, quality, and sustainable technical evolution - not quick fixes.

This role is part of a long-term product engagement focused on maintaining and gradually modernizing a large ERP platform used in real business operations.

We are committed to supporting Ukraine 🇺🇦 and are hiring Ukrainian engineers only for this role.
No strong English is required - most of the team is Ukrainian, and daily communication happens in Ukrainian.
 

About the Product

You will work on a large, mature ERP system that:

• Has been developed and evolved over many years
• Contains complex business logic, data flows, and integrations
• Is mission-critical for daily operations
• Is planned for gradual migration from Delphi to modern .NET (C#) architecture

This is not a greenfield project - it’s real engineering on a real system with real impact.
 

The Role

We’re looking for a Junior C# Developer who will:

• Work on maintaining and extending parts of an existing ERP system
• Learn to understand a legacy Delphi codebase with the support of senior engineers
• Gradually participate in the migration from Delphi to C# / .NET
• Grow technical confidence while working on a long-living product

This is a long-term role with a clear growth path in skills, responsibility, and compensation.
 

What You’ll Do

• Develop new functionality for ERP products under guidance of senior engineers
• Maintain and improve existing code (Delphi and C# parts)
• Participate in the gradual migration from Delphi to .NET (C#)
• Work with MSSQL databases and business data models
• Write clear code and basic technical documentation
• Collaborate closely with a Ukrainian engineering team
   

What You Bring

• 2+ years of commercial experience with C# / .NET
• Basic understanding of OOP and software design principles
• Basic knowledge of Delphi or strong motivation to learn it
• Experience working with SQL databases (MSSQL is a plus)
• Willingness to work with legacy code and learn complex business logic
• Responsibility, curiosity, and desire to grow as an engineer
   

Nice to Have

• Experience with ERP, CRM, or other business systems
• Understanding of MVC or layered architecture
• Any experience with system modernization or refactoring
   

What You Get

• Long-Term Stability: Work on a product designed for years of development
• Strong Learning Curve: Mentorship from senior engineers and real-world system experience
• Real Product Impact: Your work affects real business operations
• Modernization Journey: Be part of the transition from legacy Delphi to modern .NET
• Growth Path: Clear technical growth and salary progression
• Ukrainian Team: комфортна комунікація українською мовою
• Meaningful Work: Build systems that actually run companies, not just demos
   

Ready to grow on a real system that matters?
If you want to develop as a C# engineer, learn how large ERP systems work, and participate in real modernization - join AlphaDevs and become part of a long-term product journey.

👉 Apply now and grow your engineering career on real-world systems.

Project Responsibilities

Design and build .NET 8 microservices — FastEndpoints, clean architecture (Domain / Application / Infrastructure / API layers) 
Implement Temporal workflow orchestration — typed workflow and activity interfaces, cross-task-queue dispatch, signal/query patterns 
Build rules evaluation integrations with GoRules ZEN engine (GoRules.Zen NuGet, Rust FFI in-process) 
Develop platform capabilities — config registry, rules API, workflow gateway, payment and policy adapters 
Implement cross-cutting concerns — Managed Identity service-to-service auth, Cerbos authorization integration, structured logging via Serilog/Anotar 
Write and maintain xUnit tests — FakeItEasy for mocking, Shouldly for assertions; integration tests against real dependencies (no mock DB) 
Collaborate with platform and domain teams on API contracts, OpenAPI specs, and shared NuGet libraries

Working hours - BST 

Must-haves

5+ years hands-on .NET (v6+) experience; .NET 8 required 
FastEndpoints 7.x — endpoint-per-feature pattern, validators, mappers 
Clean architecture — strict layer dependency rules; no business logic in API layer; no throw for business errors (Result<T,E> pattern) 
Temporal .NET SDK — ITemporalClient, IWorkflow, IActivity, task queue registration, cross-TQ dispatch 
Azure — Key Vault, Managed Identity, Blob Storage, App Insights 
Result/Maybe monad pattern — Result<TSuccess, TError> throughout Application layer 
Entity Framework Core or equivalent — migrations, value objects, aggregate roots 
Testing — xUnit, FakeItEasy, Shouldly; integration test patterns 
Podman CLI — build service image locally (podman build), run container (podman run), inspect logs, exec into container for debugging 
Read and contribute to Dockerfile (multi-stage build — SDK build stage + runtime stage) 
Run full local stack with Podman Compose (service + Temporal + DB)

Nice-to-have

GoRules ZEN engine — JDM format, ZEN expression language, decision table compilation 
Cerbos .NET client — principal/resource construction, CheckResource middleware integration 
JSONata .NET (Jsonata.Net.Native) for data transformation 
Kafka consumer patterns 
SOAP/WCF client integration

Project Description:

Build software that runs real mining operations. See your work live on an open pit mine site. We are looking for a Senior Full Stack Developer or strong Backend Developer to help build and evolve a large scale software platform used in open pit mining operations.
This is not internal tooling or maintenance work. You will be building new features in a modern, distributed system where the changes you make are deployed into live mine sites and used every day by operational teams.
If you care about ownership, clean architecture, and seeing your work have real world impact, this role is worth a look.

Responsibilities:

You will join a cross functional product squad responsible for delivering new capabilities across a complex operational platform that supports fleet and equipment workflows in open pit mining.

Your work will include:
· Designing and building backend services using C# and .NET in a microservices and event driven architecture
· Building modern React applications focused on clarity, performance, and usability
· Owning features end to end from design through to production deployment
· Working closely with domain experts to turn complex operational problems into reliable software
· Contributing to architectural decisions, technical standards, and engineering best practice
· Improving reliability, observability, and performance in a mission critical system

Mandatory Skills Description:

• Strong experience with C# and .NET
• Experience designing and building microservices and event driven systems
• Solid SQL skills and experience with SQL Server
• Experience with Entity Framework or similar ORMs
• Comfortable owning APIs, service design, and data models
Frontend
• Strong experience with React
• Experience using modern component libraries such as MUI, Mantine, or shadcn
• Experience with state management libraries such as Redux, Zustand, or MobX
• A focus on building maintainable and user friendly interfaces

Nice-to-Have Skills Description:

• Docker and Kubernetes exposure
• Experience integrating with native or performance critical systems such as C++
• Previous experience in mining or industrial software
• Experience working with open pit mining systems

Languages:

English: B2 Upper Intermediate

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 are looking for an experienced AWS Engineer / .NET Developer with strong expertise in Amazon Web Services, .NET/C# web development, and AI technologies.

Must Have

• Strong hands-on experience with AWS (Amazon Web Services)
• Solid commercial experience with C# and .NET / .NET Core
• Strong experience with ASP.NET Core
• Experience with ASP.NET MVC
• Experience developing Web APIs / REST APIs
• Experience with web applications and web services
• Good knowledge of HTML, CSS, JavaScript / TypeScript
• Experience with modern web frameworks such as React and/or Angular
• Practical experience with AI technologies and AI-powered solutions
• Experience integrating AI capabilities into software applications
• Good understanding of cloud architecture and AWS services
• Experience with Git and CI/CD

• Good problem-solving skills and ability to work independently

   

Responsibilities

• Design, develop and maintain web applications using C#/.NET and ASP.NET Core
• Develop and maintain ASP.NET MVC applications
• Build and maintain Web APIs and REST APIs
• Develop backend services and cloud-based applications
• Work with AWS to deploy, maintain and scale applications
• Develop and integrate AI-powered functionality
• Integrate AI services and APIs into existing software products
• Work with frontend technologies such as JavaScript/TypeScript, React and/or Angular
• Improve application performance, scalability and reliability
• Participate in code reviews, technical discussions and architecture decisions
• Work closely with other developers, architects and technical teams

The candidate should have hands-on commercial experience with these technologies and be able to independently work on complex software and cloud-based solutions.

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.

We’re working on a product that powers real conversations — an intelligent call center platform built to handle serious communication volumes. Think smart call routing, live dashboards, VoIP, and deep CRM integrations. The system is already running, already growing, and needs an engineer who wants to help shape where it goes next.

📍 Lviv / Remote · Full-time · 3+ years · English Upper-Intermediate

Stack:

.NET 6+ / C# · React.js · TypeScript · MS SQL Twilio · WebRTC · SignalR · Azure (optional)

What You’ll Do:

→ Build and maintain features across the full stack

→ Integrate telephony and CRM systems via APIs

→ Work on performance and scalability

→ Take part in code reviews, estimations, and tech discussions

What We’re Looking For:

→ 3+ years with .NET (C#) and React.js in commercial projects

→ Good understanding of web architecture and client-server communication

→ Experience with REST APIs, relational databases, Git

→ English B2

What’s in It for You

✦ Stable long-term project

✦ Mentorship and regular growth conversations

✦ Remote or hybrid

✦ 18 vacation + 5 sick + 10 extra days off per year

✦ Accounting support, office lunches, team events

✦ Work Anniversaries -Special gifts to celebrate milestones.

.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.