Вакансії C# / .NET Developer

Plarium is looking for a talented .NET Developer to join our Game Server Development Department, which develops high-load, scalable game servers for our strategy games, and for a new cross-platform, third-person shooter.
The successful candidate will work with a team of specialists who create and implement tools for profiling, deployment, and monitoring our game servers, as well as develop architecture components that are used on several of our projects.
The department’s technology stack consists of: ASP.NET, MS SQL, C # .NET 8, Google Cloud, Docker, Kubernetes, NUnit, xUnit, Unity.

Responsibilities

• Maintaining and developing the server side of game projects
• Creating new gaming services
• Developing and optimizing game logic taking performance into account
• Cooperating with game designers and influencing decision-making on game mechanics
• Creating server-side solutions to improve the user experience
• Participating in the design and implementation of tooling for the current needs of projects
• Developing and customizing the infrastructure of game projects

What we expect

• At least 3 years of experience with C#, .NET, ASP. NET Core/Framework
• Experience developing multi-threaded and scalable solutions
• Understanding of the algorithms complexity and their optimization
• Knowledge of SQL databases (MS SQL, Postgres)
• Understanding of client-server application architecture
• Understanding of TCP\UDP\HTTP(S)\gRPC network protocols
• Understanding of the authentication and authorization principles, as well as ways to implement them
• Understanding of containerized applications cloud hosting in Kubernetes
• Fluency in Ukrainian
• English language skills at the intermediate level or higher

Desired

• Knowledge of tools for troubleshooting and profiling of backend solutions both in the cloud and on bare metal
• Knowledge of CI\CD systems
• Field-specific technical education

We’re a part of the team who has been developing software to help construction companies streamline their operations. Today, our product is recognized as a pioneer and leader in the market, serving thousands of construction companies across the nation. Year after year, they continue to innovate, refine, and expand their products as the industry evolves.
We develop a software that helps our client’s to manage every stage of the construction from pre-construction through construction to its final support.

Requirements

• 3+ years of development experience in .NET
• 3+ years of experience with web-development using React JS
• Strong knowledge of .NET 4.0+, .NET Core, C#, ASP.NET MVC, Javascript, Typescript, CSS, and React.JS v16.8+
• Solid working knowledge of SQL and associated database concepts (DB design and architecture, stored procedures, and basic TSQL queries)
• Experience designing RESTful APIs
• Experience with ORM such as Entity Framework or Dapper
• Experience with Bootstrap 3.0+
• Experience with Javascript bundlers (i.e. Webpack and Rollup)

Job responsibilities

• Work with the client’s team for building software solution for winning, planning, and managing construction projects.
• Collaborate with team members to estimate and plan for implementing large features.
• Web development.
• Create new or build upon existing features that solve complex customer problems.

Ciklum is looking for a Expert Full-Stack (.NET + React) Developer to join our team full-time in Ukraine.
We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As an Expert Full-Stack (.NET + React) Developer, become a part of a cross-functional development team working for one of the Ciklum’s client who develops a system designed to enhance learning, streamline school operations, and connect students, teachers, and parents in a unified digital environment. It provides real-time academic insights, and seamless integration with key educational tools.

Responsibilities

• Supervise and develop solutions using various approaches to deliver business value
• Design, code and review decisions applying high-quality standards
• Ensures process maturity and controls following them
• Lead a team in making technical decisions
• Communicate with the team and the client to share requirements and results
• Line manager responsibilities
• Team’s professional and career development. Assists the team members in their daily work

Requirements

We know that sometimes, you can’t tick every box. We would still love to hear from you if you think you’re a good fit!

• Software Design:
  • Proven background in designing and developing solutions using best practices and patterns
  • Experienced with monolithic, microservice, and event-driven architectural styles on commercial projects
  • Uses the established standards and algorithms for implementing the application
• Software Development:
  • Highly proficient in C# and able to produce secure and optimized software
  • Experienced with most of the industry standard communication mechanisms (message brokers, HTTP, WebSockets) and databases (SQL, NoSQL)
  • Proficient in HTML, CSS, and JavaScript
  • Practical use of advanced features in React
  • Deep knowledge of UI development
  • Experience with Agile development methodologies and DevOps practices
• Quality Assurance:
  • Proven experience in driving quality improvements for design and implementation decisions within a team
• Software Deployment:
  • Hands-on experience with software deployment and configuration in the Cloud (pipelines, deployment patterns) and Container Orchestrators (k8s, Docker Swarm)

Ciklum is looking for a Senior .NET Software Engineer to join our team full-time in Ukraine.
We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior .NET Software Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.
With almost 100 million active users across 25 countries, they’re a global food tech company Their tech ecosystem connects millions of active customers with hundreds of thousands of connected partners in countries across the globe. Their mission: To empower every food moment around the world, whether it’s through customer service, coding or couriers.

Responsibilities

As a Senior Software Engineer in the team

• You will play a vital role in collaborating with multiple development teams to design, implement, and maintain applications that meet business requirements
• You will develop and optimize backend solutions on AWS, including deploying services on Amazon Elastic Kubernetes Service (EKS) and leveraging AWS cloud services
• You will provision and manage cloud infrastructure using Terraform to ensure scalable and consistent environments
• You will define technical solutions through our ADR process
• Implement and manage CI/CD pipelines using GitHub Actions to ensure efficient and reliable software delivery
• Work with Docker containers for application packaging and deployment
• Implement and maintain messaging systems using SQS/SNS
• Design, develop, and optimise databases, including NoSQL and SQL databases, for data storage and retrieval
• Collaborate with cross-functional teams, including product management, and quality assurance, to deliver high-quality software solutions
• Stay updated on industry best practices, emerging technologies, and trends to contribute to the team's continuous improvement
• The team operates within the Agile – SCRUM framework, emphasising flexibility, continuous improvement, and high-impact collaboration. We engage in sprint planning, daily stand-ups, sprint reviews, and retrospectives, which are foundational to our approach in managing projects and driving innovation
• These are some of the key ingredients to the role:
  • Master the craft of writing high-quality, thoroughly tested code within a large team
  • Understand the finer points of maintaining an excellent codebase for web and server-side applications
  • Lead projects, mentor peers, and collaborate effectively. Introduce innovative ideas and develop robust, well-considered code
  • Adhere to and help refine the team’s standards and processes. Contribute to setting these standards to ensure continuous improvement
  • Pursue ongoing personal development by learning from teammates and applying this knowledge to benefit the team and enhance the applications
  • Clearly communicate the technical efforts of your team to other engineering groups
  • Own the responsibility for your updates from development through to their successful performance in production
  • Regularly release updates to production environments and oversee these changes to ensure they perform well for users
  • Play a role in reviewing and approving your team’s code changes once automated tests are passed. Generate and implement creative ideas to improve the applications
  • Experience owning streams of work, from design to support in production
  • Mentoring and supporting junior team members

Requirements

• Strong knowledge of C# .NET
• Proficiency in AWS cloud services, including experience with EKS, Lambda, RDS, and other relevant services
• Strong knowledge of Docker and containerization technologies
• Experience with CI/CD using tools like GitHub Actions
• Devops skills are a big plus as a lot of work will be in there
• Familiarity with API Gateway management and OpenAPI Specs
• Prior experience with messaging systems, preferably SQS/SNS
• Proficiency in working with both NoSQL (preferably DynamoDB) and SQL databases
• Strong problem-solving and debugging skills
• Excellent teamwork and communication skills
• Familiarity with Agile processes and team structure
• Microservice architectures and/or event-driven programming
• Strong attention to detail and understanding of when a pragmatic approach is needed
• An understanding of code design for efficiency and readability
• Commitment to writing tests as a definition of done

Desirable

• Design and build great software
• Move fast with confidence
• Secure, stable, scalable, fast and reliable platform
• Trust, control and transparency

We are looking for a Junior .NET Full Stack Engineer to take part in the analysis, design, development, and maintenance of a high-quality software solution.
Ready to grow and take part in developing impactful tech solutions?
We’re looking for a Junior .NET Full Stack Engineer to join our team and contribute to the development of a high-quality software solution for a leading global ICT provider. You’ll work on real-world challenges in mobile and fixed communication networks, sharpen your skills, and grow in a supportive environment.

Customer

Our Сustomer is one of the leading providers of information and communication technology (ICT) to service providers. It delivers products and services required for mobile and fixed communications, radio and transmission networks.

Project

The project is for one of the world’s largest telecom providers and assumes the development of web-based applications for network configuration, as well as the design and development of the software tools for a multi-domain software platform in radio, core and mobile backhaul domains, for various engineering activities such as site design, product configuration, integration, and quality assurance.

Requirements

• Experience in .NET development
• Familiarity with OOP / OOD and writing high-quality, maintainable code
• Understanding of Entity Framework / EF Core
• Familiarity with unit testing concepts, frameworks, and tools
• Familiarity with Front-end technologies (JavaScript / TypeScript)
• Basic knowledge of relational DB concepts and SQL Server
• Understanding of multi-tier application architecture
• At least an Upper-Intermediate level of English

Would be a plus:

• Experience of developing systems with a multi-tier application architecture

Personal Profile

• Strong ability to learn quickly
• Good analytical and problem-solving skills
• Strong communication skills

Responsibilities

• Design, implement, and debug your code under the supervision of Senior developers
• Learn how to cover your code using unit, integration, or component tests
• Learn and apply the best engineering and SDLC practices in daily work
• Participate in requirements clarification sessions and planning sessions with a client to help the Product team build a stable web application
• Perform code reviews of other team members using the development guidelines
• Get familiar with Agile by participating in Scrum events (daily, retrospective meetings, estimation and planning sessions, etc.)
• Contribute to build, deploy, and automation processes and learn how CI/CD works

About project:

Our Email team is at the forefront of building Spacemail.com - a cutting-edge email platform that's rapidly gaining traction. With our platform just a year into its journey, we've already attracted thousands of active clients and started generating revenue. But we're just getting started, and we need talented developers like you to help take Spacemail.com to the next level.
As part of our team, you’ll dive into full-stack development, working with a robust tech stack that includes .NET Core microservices on the backend, React micro frontends on the client side, and Terraform for infrastructure on AWS. We're all about pushing boundaries and continuously improving our platform. We’re a highly motivated, agile team of professionals who are passionate about delivering results. If you thrive in a dynamic environment and love the challenge of turning ambitious ideas into reality, we’d love to hear from you.

Your expertise:

• At least 7 years of software development experience
• Excellent knowledge of C#, .NET, .NET Core
• Excellent knowledge of Entity Framework
• Good frontend knowledge React, TypeScript, HTML, CSS
• Excellent knowledge of relational databases PostgreSQL / MSSQL
• Good experience with Integration / Unit testing
• Good experience with ASP.NET Core
• Good experience with AWS cloud services like RDS, SNS / SQS, S3 etc
• Experience developing microservices
• Knowledge of software design patterns
• Experience with Docker
• Understanding of SOLID and other OOP principles
• Understanding of REST, RPC
• Excellent communication and organization skills, product-oriented mindset, focus on team results, willingness to constant personal and team improvements, leadership qualities
• Understanding SDLC
• Upper-intermediate or higher level of English
• A team player who helps the team to grow

Will definitely be a plus:

• Experience in a lead position
• Experience with Kubernetes
• Experience with Terraform
• Experience with MobX
• Understanding of CI/CD and experience with Jenkins and Vault
• Experience with creating solution Architecture and solving nonstandard CRUD tasks
• Experience with monitoring systems like Grafana, Kibana, OpenSearch, NewRelic etc.

You will be involved into:

As a Senior Developer on our team, you’ll play a pivotal role in every phase of the Software Development Life Cycle (SDLC). From understanding and processing requirements to creating innovative solutions and breaking them down into actionable tasks, you’ll be deeply involved in the entire development process.
Your responsibilities will include:

• Writing high-quality code with at least 80% test coverage
• Participating in team refinements, code reviews, and deployments
• Monitoring deployed code using tools like Kibana, New Relic, and Grafana to ensure everything runs smoothly in production
• Handling the occasional rollback and bug fix – because let’s be real, no deployment is perfect the first time
• Collaborating with other teams to ensure seamless integration and operation across the platform
• Documenting the architecture for new features and discussing it with the architecture team and other stakeholders
• In a production environment like ours, where downtime is not an option, you’ll be at the forefront of ensuring that SpaceMail.com runs flawlessly – even during the most critical times. Plus, there’s an exciting opportunity to step into a Tech Lead position as you grow with us.

Avenga is looking for a skilled Senior .NET Engineer to join our American project. Our client is a global healthcare intelligence company that develops life-saving and life-improving drugs with comprehensive clinical development services, including data management, statistical analysis, clinical trial management, medical writing, and regulatory and drug development consulting.

This is you

• 5+ years of experience with .NET Core / .NET 8+ (C#);
• Strong ASP.NET Core skills (Web API, MVC, Minimal APIs);
• Deep understanding of Entity Framework Core (Code-First, Migrations, Performance Optimization);
• Experience with microservices architecture (API gateways, service discovery);
• Solid grasp of RESTful APIs and API security (OAuth 2.0, OpenID Connect, JWT);
• Hands-on experience with Docker and Azure DevOps;
• Proficiency in unit & integration testing (NUnit, xUnit, Moq, FluentAssertions);
• Experience with API contract testing & performance profiling (BenchmarkDotNet);
• English: Upper-intermediate or higher.

Nice-to-have skills:

• Experience with Fhir
• Familiarity with FakeItEasy library for unit tests

This is your role

• Design, plan, and develop new components;
• Release and proactive monitoring of components in production;
• Improvements to existing monitoring, alerting tooling, and playbooks;
• Contribution to performance improvements and R&D initiative;
• Participate in support duties and platform deployment rotations;
• Participate in development streams for re-architecture and refactoring activities;
• Implement new functionality with care for users, and hope for future expansion and support;
• Write code that will implement the expected desired behavior;
• Expand the system without losing support for existing features;
• Optimize system bottlenecks to reduce user dissatisfaction.

Halliburton AutoGS is a provisional name for Halliburton's initiative in automated geosteering during well drilling. The project aims to develop a system capable of independently managing the trajectory of horizontal and directional wells in real time with minimal human intervention. AutoGS combines Halliburton’s digital drilling technologies (including the LOGIX® platform for autonomous drilling) with intelligent algorithms and sensors integrated directly into the well construction process.
The AutoGS initiative fits into Halliburton’s broader strategy to develop digital solutions and automate field operations, alongside other efforts such as hydraulic fracturing automation (OCTIV® platform) and remote control of surface equipment. Thus, AutoGS is part of a comprehensive transformation aimed at increasing the efficiency and safety of drilling operations through artificial intelligence (AI) and automated control technologies.

Responsibilities

• Review and analyze tasks in Product Backlog Items provided by the Product owner
• Participation in grooming sessions and proactive task requirements and acceptance criteria clarification
• Work as part of a team using the Azure environment
• Work with the team on development and resolving issues
• Implement software changes from Product Backlog Items and technical requirements
• Work with the QA team to determine if the application fits Product Backlog Items and technical requirements
• Identify and fix bugs, find solutions to the problems
• Maintain code quality, organization, and automatization
• Maintain the developed software efficiently through a solid knowledge of software lifecycle

Must have skills

• 5+ years' experience using C#
• 1-2 yrs of experience in Python
• 1-2yrs experience with Azure technologies like Azure functions, Logic Apps, Service Bus, Blob storage.
• Experience with Active Directory Authentication
• Excellent analytical, problem solving, and debugging skills
• Familiar with Microsoft .Net Framework, and Windows application development and experience with Microsoft Visual Studio.
• Experience with Azure cloud development like building functions, blob storage, event bus.
• Experience using JSON, Web API, and in-app hosting development
• Experience/familiarity with using Message Queuing
• Experience with RDBMS including SQL. Experience using ORM tools such as Entity Framework
• Excellent analytical, problem solving, and debugging skills
• Software engineering experience in object-oriented design and applying loosely coupled distributed design patterns to realize mid-to-large size applications. Ability to apply Domain Driven Design in development.
• Must understand the need for and be willing to develop unit and integration tests. Experience with unit testing in application development.
• Experience in agile/scrum teams preferably using TFS
• Solid understanding of the software development process and experience working on agile teams
• Bachelor of Science degree in Computer Science, Computer/Electrical Engineering or other related field. Advanced degree is preferred.
• Experience with microservices a plus

Nice to have

• Full stack development experience
• Experience with Web development
• Oil and Gas experience including drilling or geological related applications development
• Experience with Scientific applications development
• Experience with using NoSQL database
• Experience with Angular 2+

We are currently looking for a Full-Stack Developer (.NET, Angular) to join our team and work on both ongoing and new projects. In our team, developers do more than just write code – they’re involved in the full product development cycle: from reviewing requirements and discussing tasks to launching the final product.

What we’re looking for:

• 3+ years of commercial experience in web development;
• English at Intermediate level (enough to work with documentation); higher levels are a plus;
• Experience with different frameworks;
• Experience working as part of a team on a project;
• Hands-on experience with Angular, JavaScript (ES6), TypeScript, RxJS, NgRx, HTML5, CSS3.

Hard skills:

• 3+ years as a Full-Stack Developer;
• Experience with at least one frontend framework (Angular, React, Vue.js);
• Strong knowledge of .NET Framework, .NET Core, ASP.NET, C#;
• Experience with Web API, ASP.NET Core, Entity Framework, MS SQL Server, MongoDB, PostgreSQL, MySQL, CI/CD, Docker, and Multithreading;
• Experience with JIRA or other task management tools, and Google Workspace;
• Strong analytical thinking (you can draw conclusions and learn from mistakes).

Soft skills:

• Organized and structured (you know how to prioritize and manage large amounts of information clearly);
• Responsible (you take deadlines seriously and will speak up early if something’s off track so we can solve it together);
• Proactive (you suggest improvements and bring ideas to boost the team’s work);
• Communicative (you’re open about challenges and work closely with the team);
• Attention to detail (your documentation is clear, easy to read, and straight to the point).

This role might not be for you if:

• You’re not interested in growing or learning new things;
• You give up when facing a tricky task that needs research or creative thinking;
• You stay silent when you run out of tasks.