Jobs C# / .NET

We are looking for a .NET Developer to join a SaaS platform focused on e-commerce analytics and product research for marketplace sellers.

The product helps users discover profitable products, analyze competition, estimate market demand, and make data-driven decisions using large-scale marketplace and sales analytics. The platform includes data aggregation, reporting, automation, and third-party integrations.

Project domain: e-commerce analytics / marketplace intelligence
Industry: SaaS, e-commerce, data analytics

Requirements:

• .NET / C# 2+ years
• ASP.NET Web API
• SQL
• Experience with Azure or AWS
• Experience with 3rd party integrations
• CI/CD (GitHub Actions, Azure DevOps, etc.)
• Git
• Docker

Nice to have:

• NoSQL
• CQRS

Who we are 

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

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

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

Product that needs your engagement 

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

Your future team of professionals 

You will join a young, ambitious, and growing team that thrives on collaboration and innovation. Currently, the team includes:

• 2 skilled Backend Engineers who ensure strong architecture and data handling
• 1 Product Manager driving the vision, roadmap, and priorities
• 1 QA Engineer guaranteeing product quality and reliability
• 2 JavaScript Developers responsible for building responsive user interfaces and front-end features

As we expand, this team will grow rapidly, and your role will be pivotal in shaping both the technical and cultural direction of our engineering organization.

Your future challenges & opportunities

Opportunities

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

Challenges

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

Impact you will make 

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

Skills we are looking for 

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

Benefits you get

• Maintain your work-life balance

Manage your own working hours with our flexible schedule

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

No overtimes required

• Hybrid type of cooperation

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

• Stay healthy

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

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

• Grow with us

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

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

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

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

• Stand with Ukraine!

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

We are a perfect match if you share our values

We are professionals in our field.

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

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

We create a calm and friendly atmosphere within the company.

We value the freedom of open and transparent communications.

Radical honesty is embedded in the foundation of our culture.

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

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

Our Hiring Process

• Recruitment Interview
• Technical Interview
• Offer Call

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

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

Pivdenny Bank is one of the leaders in the Ukrainian financial market and ranks third in the group of Ukrainian private banks in terms of assets. For 32 years, Pivdenny has been a reliable financial partner for individuals, small and medium enterprises, and corporations.

More than 1700 active and dedicated employees work for Pivdenny throughout Ukraine. For four years in a row, the bank has been included in the Forbes 50 Best Employers rating.

We are now looking for a Oracle/.Net Software Engineer to join our team.

Responsibilities:

• Develop fullstack solutions within electronic document management systems;
• Design, maintain, and optimize database structures;
• Write and optimize SQL/PL/SQL queries;
• Implement server-side and client-side application logic;
• Maintain and enhance existing solutions (bug fixing and improvements);
• Write automated tests and ensure code quality;
• Build Docker images and contribute to deployment processes (Docker/Kubernetes);
• Monitor system performance and optimize solutions;
• Collaborate with developers, analysts, and other stakeholders.

Requirements:

• 5+ years of experience with C# / ASP.NET Core;
• 5+ years of experience with Oracle (SQL, DML, PL/SQL, database objects, query optimization);
• Strong experience in database design (including partitioning, indexing, analytical functions);
• Experience in fullstack development;
• Experience with automated testing and understanding of TDD principles;
• Experience with Docker (Kubernetes is a plus);
• Experience with data and code migration between databases;
• Experience with Git;
• Solid understanding of system performance optimization;
• Ability to justify and defend technical decisions;
• Strong communication and teamwork skills.

Nice to have:

• Experience with electronic document management systems;
• Experience with high-load systems;
• Experience with Kubernetes;
• Understanding of microservices architecture.

What we offer:

• Competitive salary;
• Stable long-term projects;
• Opportunity to influence architecture and technical decisions;
• Professional growth and knowledge sharing within the team;
• Flexible working format;
• Social benefits (paid vacation, sick leave, etc.).

Please submit your application for more details.

We review resumes within 14 days. If you do not hear from us, it means that we cannot offer you a position at this time, but we have kept your resume in our database. We will contact you when we have a suitable opportunity.

We are looking for an AI Engineer to join a product engineering team focused on introducing LLM-based capabilities into enterprise software and building systems such as MCP servers and agents. The role involves working on AI-driven product features, backend services, and integrations that connect models with tools and data in a scalable production environment.

Location: Serbia (relocation support available), Croatia, Poland, Portugal

Tasks:

• Design and develop AI-powered product features with a focus on LLM-based capabilities;
• Build and maintain MCP servers and agent-based components;
• Develop enterprise-grade web services and backend integrations;
• Work with tools, data sources, and model interfaces across cloud environments;
• Collaborate with engineering teams to deliver production-ready AI solutions.

Requirements:

CORE

• AI Engineer profile with strong SDE background;
• Proficiency in C# or Python;
• Knowledge of Model Context Protocol (MCP) for connecting tools and data into models;
• Experience in developing enterprise-grade web services;
• Experience working with cloud platforms such as Azure, AWS, or GCP.

Nice to have

• Hands-on experience with LLM and RAG engineering, including retrieval design, chunking, vector stores, and structured outputs, using tools such as OpenAI, LangChain, or LlamaIndex;
• Experience in building and orchestrating agentic systems that call tools and reason over retrieved context, using frameworks such as LangGraph or AutoGen, and OpenAI tool calling or the Responses API;
• Familiarity with LLM evaluation and observability tools such as LangSmith or Langfuse;
• Experience with guardrails and security measures such as prompt injection defense and output validation.

On behalf of our client, we are looking for a Senior .NET Developer.

Responsibilities:

- Support and enhance existing .NET applications and internal systems

- Help migrate legacy code repositories from TFS to Git

- Contribute to DevOps / CI/CD pipeline setup and modernization

- Work on integrations between internal systems and third-party platforms

- Write, optimize, and troubleshoot MS SQL / T-SQL queries and stored procedures

- Debug application, data, and integration issues

- Document system logic, data flows, and technical decisions

- Collaborate directly with the client’s internal IT/development team

Requirements:

- 5+ years of commercial software development experience

- Strong experience with C# / ASP.NET / .NET

- Strong experience with MS SQL / T-SQL

- Experience with legacy systems and enterprise integrations

- Practical experience with TFS, Git, CI/CD, or DevOps pipelines

- Good understanding of relational databases and multi-tier application architecture

- Strong communication skills and ability to work independently in a client-managed environment

Nice to Have:

- COBOL.NET

- Java / JavaScript

- SQL Reporting Services / SSRS

- Insurance, fintech, or regulated industry experience

- Experience modernizing legacy enterprise systems

Company offers:

- Long-term employment with possibilities for professional growth

- Fully remote work

- Reasonably flexible schedule

- 15 days of paid vacation

- Regular performance reviews

About the Role

The company is a B2C gaming startup building a high-performance sweepstakes platform already serving real users. The system handles real-time transactions at scale in a regulated space — reliability, speed, and security are paramount. The company operates lean, with backend engineers owning their services from architecture to production. Engineers here don't just implement — they design, decide, and ship. The company is looking for a Senior Backend Developer with 5+ years of experience who wants real ownership over systems that matter. This isn't a ticket-taking role — you'll be driving system design, making tech stack decisions, and shaping the architecture of a live, real-money gaming platform. You'll design and build backend services using .NET 10, own features end-to-end from architecture through production, and work directly with product, business, and compliance stakeholders. You'll be expected to identify the right tool for the job — whether that's choosing between Postgres and MongoDB for a given flow, deciding when WebSockets beat HTTP, or deciding what doesn't need to be built at all.

Responsibilities

• Lead system design and architecture for backend services using .NET 10
• Choose the right tech stack for each problem and justify those decisions
• Architect scalable, secure, and high-performance APIs and real-time systems
• Design data models and flows across PostgreSQL and MongoDB based on access patterns, consistency needs, and scale
• Build real-time gameplay and transaction features using WebSockets and event-driven patterns
• Apply backend best practices — clean architecture, SOLID, KISS, testing, logging, and monitoring — pragmatically, not dogmatically
• Own features end-to-end — from architecture and implementation through deployment, monitoring, and iteration in production
• Manage CI/CD pipelines and AWS infrastructure for the services you own
• Collaborate directly with product, business, and compliance stakeholders to shape what gets built
• Use AI coding agents (Claude Code, Codex, Cursor, etc.) to raise both velocity and quality

Requirements

• 5+ years of backend development experience, with strong fluency in modern .NET (C# / .NET 6+)
• Demonstrated experience owning system design and architecture decisions on production systems
• Strong experience with both PostgreSQL and MongoDB — including schema design, indexing, and choosing between them based on workload
• Experience building real-time systems with WebSockets
• Track record of taking complex features end-to-end: design, implementation, deployment, and production ownership
• Ability to choose and justify a tech stack rather than just consume one
• Strong analytical and problem-solving skills, with a bias toward simple, correct solutions
• Comfortable with full ownership in a lean startup environment — no hand-holding, no hiding
• Experience with or strong willingness to adopt AI coding tools
• Independent, proactive, opinionated, and solution-oriented

Nice to Have: 

• Experience in gaming, sweepstakes, fintech, or high-scale B2C platforms
• Experience with AWS (ECS, RDS, etc.)
• Experience with message queues and event-driven / asynchronous architectures
• Experience designing for regulated environments (compliance, auditability, PII handling)

About the Company

The company is a B2C gaming startup building a high-performance sweepstakes platform already serving real users. The system handles real-time transactions at scale in a regulated space. They operate lean, with a small, senior team and minimal bureaucracy, allowing decisions to be made quickly. The environment is fast-paced and focuses on meaningful ownership over core systems.

About the Company
Digis is a European IT company (part of Fiverr) with 200+ specialists delivering high-load SaaS platforms, enterprise solutions, and cloud-native products for clients worldwide. We build long-term engineering teams and ensure transparency, stability, and professional growth for every talent.

About the Project
Our client is a hybrid insurance company and social movement, historically focused on supporting women and local communities since 1895.
This is a great opportunity for a developer who enjoys legacy modernization, enterprise systems, DevOps improvements, and practical problem-solving in a stable environment.

Responsibilities

• Migrate legacy repositories from TFS to Git.
• Help design and implement DevOps / CI/CD pipelines.
• Support and enhance existing .NET applications and integrations.
• Debug legacy application and data incidents.
• Write and optimize T-SQL queries and stored procedures.
• Document system processes, data structures, and integration logic.
• Support integrations between vendor products and internal policy / underwriting systems.
• Potentially advise internal developers on modernization best practices.

Requirements

• 5+ years of commercial experience with .NET/C#
• 2+ years of hands-on experience with MS SQL / T-SQL
• Basic JavaScript experience
• English level: Upper-Intermediate or higher

We Offer

• 20 paid vacation days per year
• 5 paid sick leaves per year (no medical documents required)
• Personalized development plan with training compensation
• English courses compensation
• Work equipment if needed (PC / laptop / monitor)
• Flat and transparent internal communication
• Opportunity to switch between projects and technologies within Digis
• Full accounting and legal support

If you’re interested, feel free to apply or contact us for more details.

• Project Description:

  Luxoft, a DXC Technology Company, is a digital transformation services and software engineering firm providing bespoke IT solutions that drive business change. In financial services we deliver complex projects with highly skilled engineering talents. If you would like to help us build engineering solutions that make difference for our global financial industry clients, this may be your opportunity. We are looking for C# engineers with experience in scalable system designs, to join the team developing a firm-wide Risk platform for our client US multinational investment bank. Working in this project will let you:
  - learn more about financial markets, products and risks.
  - verify and grow your skills in global diverse team.

• Responsibilities:

  - Design and develop software components for Equity Risk Platform built on C# and C++
  - Coordinate efforts with local developers and wider global team.
  - Do scalability and performance optimizations.
  - Manage the software development life cycle, from planning and prioritizing to testing and release.
  - Review, test and debug team members' code
  - Document development phases
  - Identify and analyze user requirements.
  - Selection of the most suitable solutions for creating a product
  - Compliance with deadlines

• Mandatory Skills Description:

  - 4+ years of hands-on experience using .Net technology stack and providing high-quality solutions.
  - Solid core .Net, multithreading, concurrency, design patterns.
  - Experience with SQL
  - Ability to apply modern security protocols and best practices.
  - Good delegation and time management skills
  - Problem-solving abilities
  - The ability to prove their point of view to the customer.
  - Excellent communication skills

• Nice-to-Have Skills Description:

  - C++ knowledge
  - Investment Banking experience

• Languages:
  • English: B2 Upper Intermediate

Luxoft, a DXC Technology Company, is a digital transformation services and software engineering firm providing bespoke IT solutions that drive business change. In financial services we deliver complex projects with highly skilled engineering talents. If you would like to help us build engineering solutions that make difference for our global financial industry clients, this may be your opportunity. We are looking for C# engineers with experience in scalable system designs, to join the team developing a firm-wide Risk platform for our client US multinational investment bank. Working in this project will let you:
- learn more about financial markets, products and risks.
- verify and grow your skills in global diverse team.

• Responsibilities:

  - Design and develop software components for Equity Risk Platform built on C# and C++
  - Coordinate efforts with local developers and wider global team.
  - Do scalability and performance optimizations.
  - Manage the software development life cycle, from planning and prioritizing to testing and release.
  - Review, test and debug team members' code
  - Document development phases
  - Identify and analyze user requirements.
  - Selection of the most suitable solutions for creating a product
  - Compliance with deadlines

• Mandatory Skills Description:

  - 4+ years of hands-on experience using .Net technology stack and providing high-quality solutions.
  - Solid core .Net, multithreading, concurrency, design patterns.
  - Experience with SQL
  - Ability to apply modern security protocols and best practices.
  - Good delegation and time management skills
  - Problem-solving abilities
  - The ability to prove their point of view to the customer.
  - Excellent communication skills

• Nice-to-Have Skills Description:

  - C++ knowledge
  - Investment Banking experience

Freelance Back-End Developer (.NET) — iGaming

About the Role:
We are looking for an experienced Back-End Developer (.NET) for freelance collaboration in the iGaming domain. The primary focus is supporting existing projects, developing new features, and working with game mathematics (RTP, simulations).



Technical Stack:

.NET 6 / C# 10
Backend services with IPC/protocol serialization patterns (paytable XML)
Deterministic RNG and probability-table driven logic
NUnit, FluentAssertions
Git, CI/CD, Argo, Kubernetes


Requirements:

3+ years of experience as a Back-End Developer (.NET 6 / C# 10)
Mandatory experience in iGaming (slots) — casino game server patterns
Strong understanding of backend service architecture and serialization/IPC patterns
Experience with deterministic RNG and probability-table driven game logic (paytable XML)
Solid unit & integration testing skills (NUnit, FluentAssertions), including deterministic tests for RNG-driven systems
Ability to propose safe fixes, add regression tests, and explain probabilistic side effects
Good Git habits, clean and reviewable code, test-first mindset
Upper-Intermediate English or higher (written communication, documentation)
Hands-on experience with AI tools as part of everyday work is a must


Personal Qualities:

Ability to onboard quickly into existing projects and codebases
Proactive and self-driven — comfortable working without micromanagement
Clear written communication and documentation habits
Analytical mindset with attention to probabilistic edge cases

Support and development of existing game backend projects
Design and implementation of new features and game mechanics
RTP testing and simulation runs
Performance optimization and system stability
Working with game logic and integrations

C++ interop or mixed-language system experience (project references C++ gating logic)
Performance profiling and low-latency optimizations
CI/CD, Argo, Kubernetes hands-on experience
Prior work on casino or gambling game logic

We are looking for a visionary Senior .NET Developer to take full ownership of the backend for our Cloud Analytics Platform. This role is perfect for a technical leader who is passionate about AI integration and wants to be a pioneer in using the Model Context Protocol (MCP). You will not only architect scalable solutions but also mentor other developers, ensuring technical excellence and driving the project’s success from day one.

The Project

You will be leading the development of a cutting-edge Cloud Analytics Platform that directly impacts the quality of medical training worldwide. The platform helps healthcare centers achieve prestigious SSH accreditation by leveraging AI-powered insights and secure data analytics. This is a mission-driven project where you will work with a leading-edge AI stack (Claude API, LLM agents) and high-standard security protocols.

Tech requirements:

• 5+ years of experience with C# / .NET 8 backend development.
• Mandatory experience with AI service integration (Claude API, LLM integration, or building AI-powered agents).
• Strong knowledge of Model Context Protocol (MCP) and building MCP Tool Servers using the .NET SDK.
• Proven track record of mentoring developers and conducting code reviews.
• Expertise in PostgreSQL and designing analytical data models (Star Schema).
• Strong understanding of RESTful API design, Dependency Injection, and Clean Architecture.
• Solid grasp of authentication (JWT + OAuth2) and strict multi-tenant isolation.
• Familiarity with CI/CD pipelines (GitHub Actions) and Docker.
• English — Upper-Intermediate (B2), Ukrainian — fluent.

Nice to have:

• Experience with reporting libraries like QuestPDF or ClosedXML.
• Knowledge of healthcare standards (GDPR, HIPAA, or SSH accreditation).
• Experience with Azure (App Service, Container Apps, Managed PostgreSQL).
• Experience with Python microservices for data exchange.

What you will do:

• Act as the Backend Owner, taking full responsibility for the technical design, scalability, and performance.
• Mentor and guide the Middle .NET Developer through regular code reviews and consultations.
• Design and maintain services for the Cloud Analytics Platform following Clean Architecture.
• Develop and optimize PostgreSQL databases (fact and dimension tables) for high-performance queries.
• Build and maintain the Metric Catalog as a single source of truth for business metrics.
• Develop MCP Tool Servers to securely expose metrics to the AI Query Assistant.
• Implement daily batch ingestion pipelines (ETL) using .NET Worker Services and Quartz NET.
• Integrate Claude API (via Microsoft.Extensions AI) for natural-language querying.
• Ensure GDPR compliance (PII pseudonymization, AES-256 encryption, audit logging).

What we offer:

• Access to internal and external training, certification reimbursement;
• 18 working days of paid vacation, 10 compensated public holidays, and up to 10 paid sick days;
• Partial reimbursement for external English classes / free internal courses / speaking clubs;
• Up to $180/year for sports activities;
• A strong culture of knowledge sharing with senior experts you can really learn from;
• New equipment provision, and accounting support if needed;
• Competitive market-level salary with regular performance and salary reviews;
• Extra perks such as an insurance fund, seasonal gifts, celebrations, and additional team compensations;
• A psychologically safe and supportive environment;
• Active social responsibility and continuous support for the Armed Forces.

📌 If you believe this role could be a great match for you, please send your CV — we will review it and get in touch with you if there’s a match.

About the Role:

• We are modernizing legacy line-of-business applications into scalable, cloud-native platforms using .NET 10, ASP.NET Core, and Microsoft Azure.

• Legacy source systems may include ASP.NET Web Forms, MVC, WCF, WinForms, classic ASP, and older .NET Framework applications. The goal is to transform them into modern, secure, and maintainable solutions running on Azure.

• The successful candidate will work on incremental modernization initiatives using the Strangler Fig migration approach, replacing legacy modules with modern components while ensuring production stability.

Key Requirements:

• 4+ years of experience with C#, .NET Framework, and modern .NET 6/8/10 development

• Hands-on experience with legacy technologies such as ASP.NET Web Forms, ASP.NET MVC, WCF, WinForms, or classic ASP

• Strong expertise in ASP.NET Core (MVC, Razor Pages, Minimal APIs, Blazor)

• Experience with Entity Framework Core, LINQ, dependency injection, and async/await

• Solid knowledge of SQL Server / Azure SQL, T-SQL, indexing, and query optimization

• Practical experience with Azure services including App Service, Azure SQL, Blob Storage, Key Vault, Managed Identity, and Azure Functions

• Experience using AI-assisted development tools such as GitHub Copilot, Claude, or ChatGPT

• Strong understanding of software engineering best practices, testing, Git workflows, and secure coding principles

• Ability to collaborate effectively with DevOps, QA, and product teams in an agile environment

• Excellent problem-solving and communication skills

Key Responsibilities:

• Analyze existing legacy applications and design modernization strategies for migration to .NET 10

• Migrate legacy UI components to Razor Pages, Blazor, and modern ASP.NET Core patterns

• Refactor legacy data access layers to EF Core 10 with code-first migrations and repository patterns

• Replace legacy authentication systems with ASP.NET Core Identity or Microsoft Entra ID

• Develop and maintain REST APIs using modern ASP.NET Core architecture and best practices

• Implement background processing and scheduled tasks using Azure Functions and Durable Functions

• Integrate solutions with Azure services such as Azure SQL, Blob Storage, Key Vault, Application Insights, and Service Bus

• Write and maintain unit, integration, and end-to-end tests using xUnit, NUnit, Playwright, or Selenium

• Leverage AI coding assistants to accelerate migration, refactoring, documentation, and testing activities while ensuring code quality and security

• Monitor, troubleshoot, and optimize applications using Application Insights, structured logging, and KQL queries

• Work closely with DevOps and QA teams on CI/CD pipelines, deployment readiness, environment management, and test automation.

Technical Skills:

• .NET Framework, .NET 6/8/10, C# (latest language features)

• ASP.NET Core, Razor Pages, Minimal APIs, Blazor

• Entity Framework Core, LINQ, dependency injection, async/await

• HTML5, CSS3, JavaScript (ES6+), TypeScript

• React, Angular, or Blazor experience

• SQL Server, Azure SQL, stored procedures, query tuning

• Azure App Service, Azure Functions, Blob Storage, Key Vault, Managed Identity

• Application Insights, Log Analytics, KQL

• GitHub Copilot, Claude, ChatGPT, AI-assisted development workflows

• Git, pull request reviews, trunk-based or GitFlow workflows

Nice to Have:

• Experience with Web Forms to Razor Pages or Blazor migrations

• Knowledge of Strangler Fig modernization patterns

• Experience with Durable Functions and event-driven Azure services

• Containerization using Docker or Azure Container Apps

• Knowledge of OAuth 2.0, OpenID Connect, and Microsoft Entra ID

• Performance profiling and diagnostics tools

• Experience in government, procurement, or enterprise modernization projects

Soft Skills:

• Strong analytical and problem-solving mindset

• Ability to balance modernization with business continuity

• Comfortable working in hybrid legacy and modern environments

• Excellent written and verbal communication skills

• Collaborative approach with cross-functional teams

• Mentorship mindset and willingness to support junior developers

• Focus on incremental, maintainable, and low-risk delivery

We are the company bringing together developers across various technologies, and currently we are looking for strong and experienced Senior .NET Developer, who can become a part of our progressive team. We are open for opportunities to expand our team and strength it with skilled specialists. We consider Ukrainian candidates both from abroad and from Ukraine.

Requirements 
- 5+ years in .NET development 
- strong knowledge of .NET / C# (ASP.NET, .Net Core, MySQL, MongoDB, PostgreSQL, etc.), Kubernetes, Docker 
- working with microservice architecture, RESTful APIs
- expertise in Azure (understanding of AWS, GCP will be a plus)
- good English skills (from Intermediate)
- experience with CI/CD will be a plus (Azure DevOps, GitHub Actions)

What we offer 
- working with us as an agency
- remote work and flexible schedule 
- career development: take courses
- English lessons 
- paid vacation and sick-leave days

Hiring steps: intro, technical interview or test task, meeting with CTO, offer. 

If everything mentioned below is about you - we are waiting for your application.

We are looking for a responsible and self-motivated .NET Engineer who will join our team. This is PCI DSS complaint payment gateway which works with e-commerce platforms and general web applications. We have 100+ integrations with different payment systems and a lot of international clients.  

Required skills: 

• 1+ working experience in .NET ; 
• .NET Core ; 
• MS SQL / Postgres ; 
• OOP, OOD, Design Patterns ; 
• Vanila JS / jQuery ; 
• Algorithms & Data structures ; 
• Entity Framework Core ; 
• Git, CI/CD understanding ; 
• REST, HTTP ; 
• Asynchronous Programming ; 
• English level – Intermediate + (you will need to communicate with developers from 3rd party companies).  

Responsibilities:  

• Integration with 3rd party API’s and systems: investigate and estimate documentation of Payment Solution partner-company, make integration according to the requirements in the documentation, communicate with developers from their side if some questions occurred. 
• Deliver high-quality code; 
• Participation in an estimation process; 
• Active collaboration with team (participation in grooming, daily meetings, planning sessions etc.).

Description

For Rail client to support design and development activities in migration of Windows stand alone application to cloud service on Azure Cloud.

Short background of the stack
Backend: 95% C# with asp.net core, C# med asp.net framework and a custom extension in Java.
Frontend: C# with either Maui blazor or asp.net core + signal r + typescript
Hosting: VMs in azure or customer hosted – future will be containers on linux.
Deployment: Linux docker containers, legacy windows services, with misc oss/cots products (mssql, postgres, hivemq, traefik, keycloak)

Requirements

MUST HAVE

5+ years of experience with Microsoft Technologies: .Net, WPF, C#

RESTful API design

Linux 

gRPC

Messaging / message-brokers

Technical debt management

Network communication (connection handling, timeouts, retries, basic TCP & UDP understanding)

TLS understanding

Container technologies

Advanced mathemathics – applied math

Passionate about learning new business areas and technologies.

Ability to adapt quickly to an existing, complex environment.

Strong communication skills (both verbally and in writing) with internal team members and external business stakeholders.

Strong knowledge of software development best practices and techniques

NICE TO HAVE

SignalR
OpenTelemetry
Azure DevOps
State-driven design
Event-driven design
Store-and-forward / buffering patterns

EXPERIENCE WITH

Integrating with external systems and protocols. Forward-compatability

Working in regulated environments

Ensuring reliability in unreliable runtime environments

Meaning of idempotence and invariant

Job responsibilities

Reverse engineering of .Net / C# stand alone application and porting it to Web, cloud based apll hosted on Azure

Participate in the design and development of scalable cloud solutions.

Develop new software products – design, code, test, package and document new products.

Work closely with Scrum teams and stakeholders to successfully bring the solution to production.

Work with the project lead and project team to plan, estimate, schedule and implement development project tasks.

Report development project status in accordance with project plans.

Participate in the planning of and execution of on-site customer testing.

Business trips to Copenhagen will be required for onboarding (2 weeks) and later – once per quarter