Jobs C# / .NET

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.

UNITY-BARS - українська ІТ компанія, яка спеціалізується на розробці та впровадженні банківського програмного забезпечення та фінансових установ, у пошуках  Middle - Senior .NET Developer 

Необхідно:

• .NET, .NET Core; 
• Web API; 
• RxJS; 
• Entity Framework; 
• Angular; 
• NgRx; 
• Reactive Forms; 
• REST API; 
• EF Core; 
• DI (dependency injection); 
• SOLID principles; 
• HTML & CSS;
• JWT; 
• Досвід роботи від 2х років. 

Буде перевагою: 

• Технічна освіта (Інформаційні технології, комп’ютерні науки та ін.); 
• Досвід роботи з Kafka (на рівні принципів producer/consumer) та SignalR. 

Що будемо робити:

• Розробка інтеграційного модуля; 
• Адаптація існуючих рішень. 

Ми пропонуємо: 

• Офіційне працевлаштування;
• Змішаний графік роботи;
• Медичне страхування;
• Корпоративні курси англійської;
• Проєкти для країни та комерційного ринку, а також можливість постійного навчання та розвитку. 

Етапи підбору: співбесіди (онлайн) soft skills /hard skills / final

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.

Overview 

We are supporting a digital asset infrastructure company whose platform uses cryptographic security and multi-party computation (MPC) to protect and sign digital-asset transactions.

The company is looking for a Senior Backend C#/.NET Engineer to replace a business-critical Excel/VBA spares booking tool with a maintainable application. The engineer must be capable of shaping partially documented requirements, building the application and integrating it with existing stock and ERP processes.

Practical experience using AI coding tools or agents is required, alongside strong independent engineering judgement, testing and verification.

About the Project
Four Excel/VBA workbooks currently support three operational workflows:
1. Spares booking.
2. Substrate stock counting.
3. Label generation.

Spares booking is the first delivery priority. The current workflow records stock withdrawals in Excel for subsequent ERP updates.

The replacement application will:
— Retrieve stock information through an agreed Microsoft Dynamics NAV integration.
— Record booking transactions promptly in a designated SQL table when an operator books stock out.
— Use the client’s existing posting mechanism for subsequent ERP processing.
— Integrate enterprise single sign-on.
— Support existing 2D barcode scanners, subject to confirming device compatibility and input behaviour.

A desktop application is preferred. The .NET version, desktop framework, stock-read interface and detailed integration contract remain to be agreed.

The initial rollout will cover two UK sites. There is interest in wider international use, but the scope and timing of this remain unconfirmed.

Stock counting and label generation will be assessed next to determine whether each should be repaired, retained or replaced. Completion of all workflows within the initial four-month engagement is not guaranteed.
 

Must-Have Experience and Skills
Technical:
— Strong commercial C#/.NET development experience.
— Experience delivering maintainable desktop applications in C#/.NET.
— Strong SQL capability, including reliable transaction writes.
— Integration with ERP or comparable transactional business systems.
— Ability to read and understand Excel formulas and VBA.
— Enterprise single sign-on integration.
— Practical experience configuring and directing AI coding tools or agents.
— Independent review, debugging and testing of generated code.
— Understanding of data validation, concurrent operations, failed transactions and duplicate submissions.
— Ability to make pragmatic architectural decisions where requirements are

incomplete.

Business and Delivery
— Clear technical English.
— Effective remote working and stakeholder collaboration.
— Ability to work directly with operational users to validate business processes.
— Comfortable owning delivery with limited day-to-day direction.
— Clear communication of dependencies, risks, trade-offs and progress.

Desirable Experience
— Microsoft Dynamics NAV.
— Barcode scanner integration, particularly 2D scanners.
— Stock, inventory, warehouse or manufacturing applications.
— Replacing Excel/VBA tools with supported business applications.
— Delivering software through QA, user acceptance testing and operational

handover.
— No mandatory sector/market experience is required.

Responsibilities 
— Analyse the existing workbooks, formulas, VBA and supporting processes.
— Validate intended behaviour with the applications team and operational users.
— Identify defects and obsolete workarounds that should not be carried into the

replacement.
— Agree a prioritised backlog and realistic delivery increments.
— Design and build the C# application using an approved AI-assisted development

workflow.
— Own generated-code review, engineering decisions and testing.
— Implement stock retrieval and booking transaction writes through the agreed

integration.
— Integrate single sign-on and confirm barcode scanner compatibility.
— Agree permissions, transaction history and safeguards during design.
— Support client QA and business user acceptance testing.
— Provide the tested application, deployment instructions and maintenance

documentation.
— Assess the remaining workflows and recommend proportionate next steps.
— Escalate dependencies and scope constraints early.

Team and Client Support
The engineer will work closely with a dedicated member of the client’s applications team, who will:

— Act as the primary link between the developer and business users.

— Own requirements and prioritisation with the business.
— Support SQL integration.
— Perform QA testing.

Business users will undertake UAT. Completion will be signed off by the client’s nominated IT stakeholders. The client owns hosting, identity/access, backups, production deployment and ongoing support. The engineer is responsible for preparing the application and supporting testing and handover
 

Assessment Process
1. CV Review
2. Screening Call (30 mins) – Technical screening to understand experience 
3. Technical assessment/challenge. (1 hr)
4. Final Interview (30 mins) – Cultural fit, collaboration instincts, MVP mindset 

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.

   

Deviark is an international software development company specializing in IT consulting, project management, and software development.

The main areas of expertise are native Android/iOS apps and web solutions. We also cover the full software development lifecycle, mobile app development, UI/UX design, business analysis, embedded systems, and more.

Our mission is to provide our clients with solutions that help them succeed. We work at the highest level of quality and productivity.

Our team is expanding, and we are looking for new talent. This time we are actively looking for a FullStack Engineer (TypeScript/.NET).

You are our ideal candidate if:
— You have at least 4-5 years of commercial experience;
— Experienced in ASP.NET, React (NextJS), TypeScript;
— Experienced with Azure, IoT/IoT Hub (would be a huge plus);
— Understand the entire web development process (design, development, and deployment);
— Have an Intermediate English level (at least).
— Collaborative approach to teamwork and the ability to clearly communicate and justify decisions to clients.

What we can offer:
💰 Competitive compensation
📈 Regular salary and performance reviews
🇬🇧 Free English language courses
🌱 Professional development and career growth
🎓 Company-funded conferences, certifications, and seminars

If you recognize yourself in the description, send your resume as soon as possible. If your experience is relevant to the position, our recruiter will contact you within 5 working days.

Join us and become a part of our Deviark Team of Professionals!

We are looking for a motivated Junior .NET + React Developer with 1+ years of commercial experience to join our development team.

The ideal candidate has a solid backend development foundation, experience with React, and a willingness to grow as a Full-Stack Developer.
 

Requirements

• 1+ years of commercial software development experience.
• Good knowledge of C# and .NET / ASP.NET Core.
• Solid understanding of backend development principles, REST APIs, and database integration.
• Practical experience with React.js, JavaScript, or TypeScript.
• Experience working with relational databases (SQL Server or PostgreSQL).
• Familiarity with Microsoft Azure and cloud-based services.
• Understanding of Git and software development best practices.
• English level: B1–B2.
   

Nice to Have

• Experience with Azure App Services, Azure Functions, or Azure DevOps.
• Knowledge of Entity Framework Core.
• Experience with unit testing.
• Understanding of CI/CD processes.
• Work in a hybrid format.
   

Responsibilities

• Develop and maintain web applications using .NET and React.
• Build and integrate RESTful APIs.
• Work on both backend and frontend features, with a stronger focus on backend development.
• Collaborate with developers, QA engineers, and other team members.
• Participate in code reviews and technical discussions.
• Troubleshoot issues and improve application performance.

• Continuously learn and apply modern development practices.

   

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