Jobs C# / .NET

Description

We’re working on a modernization project where Fortran and C are heavily used. The goal is to migrate it into C#. We’re building a set of technical solutions to speed up and streamline the transition. 

Requirements

We are seeking a specialized developer to participate in a critical legacy modernization project. Your primary goal is to analyze, document, and support the migration of legacy algorithms from Fortran and C into a modern C# .NET environment. This role requires a “software archaeologist” mindset – you must be able to understand complex scientific/mathematical logic written decades ago and preserve its integrity in a modern architecture.

Must-Have Qualifications

• Fortran Proficiency: Deep experience reading and writing Fortran (versions 77 through 95). You must understand common legacy patterns (COMMON blocks, EQUIVALENCE statements, fixed-format source).
• Some C# / .NET Expertise (or another oop/modern programming language)
• C Language Knowledge: Ability to read and navigate C code, particularly where it interfaces with Fortran.
• Refactoring Experience: Proven track record of working on code migration or modernization projects.

• Nice-to-Have
  Experience with mathematical or scientific computing libraries 
• Familiarity with Fortran-to-C interoperability

Job responsibilities

• Analyze & Reverse Engineer: Deeply review existing legacy codebases (Fortran 77/90/95 and C) to understand the underlying business logic and mathematical models.
• Code Migration: Support C# developers in porting functions, subroutines, and data structures from Fortran/C to clean, idiomatic C#.
• Validation & Testing: Support creation of distinct unit tests to ensure “bit-exact” or functionally equivalent outputs between the legacy executables and the new C# solution.
• Interop Management: Temporarily manage P/Invoke or C++/CLI wrappers if a phased migration strategy is required.
• Documentation: Document the logic of undocumented legacy modules for future maintainability.

About the Role

We are looking for a Full-Stack Developer strongly focusing on .NET and React or Angular.
You will develop robust backend services using modern .NET technologies and build scalable front-end applications using Angular or React.

Responsibilities

• Develop backend services using C#, .NET Framework, .NET Core, ASP.NET Core/MVC/WebAPI.
• Build scalable web applications with Angular or React.
• Develop and integrate REST APIs.
• Work with relational databases (SQL Server/PostgreSQL/MySQL).
• Implement data access using Entity Framework Core or similar ORMs.
• Design modular, maintainable, and scalable architecture (OOP, SOLID, patterns).
• Participate in CI/CD processes using Azure DevOps; work with Git, Docker, Kubernetes.

Required Skills

     Frontend

• Hands-on experience with JavaScript, TypeScript.
• Proficiency in React or Angular.
• Strong knowledge of HTML, CSS, JavaScript, TypeScript.

• Experience with UI/UX principles and responsive design.

   

     Backend (.NET — strong focus)

• Experience in backend development using:
  • C#
  • .NET Framework
  • .NET Core
  • ASP.NET Core (MVC, WebAPI)

• Strong understanding of OOP, OOD, SOLID, design patterns, software architecture styles.

   

     Database

• Experience with SQL databases (SQL Server, PostgreSQL, MySQL).

• Experience with Entity Framework Core or similar ORMs.

   

     Cloud & DevOps

• Familiarity with Azure Cloud.

• Experience with Git, Azure DevOps, CI/CD pipelines.

   

     Would Be a Plus

• Python, PHP

   

     Soft Skills

• Strong communication skills
• Analytical thinking
• Ability to work in a team
• Willingness to learn new technologies

• English: Upper-Intermediate+

   

     Education

• Bachelor’s degree in Computer Science or related field.

We’re looking for a Full-Stack .NET Developer who enjoys building real, modern web applications and wants to grow together with our team. If you’re comfortable working with both backend and frontend and like turning ideas into working solutions, this role is for you.

Your Responsibilities:

• Develop and improve web apps using C#, ASP.NET Core, and React
• Build and connect REST APIs
• Work with Azure and help manage deployments
• Keep the code secure, clean, and fast
• Collaborate with designers, PMs, and QA to deliver great products

What We Expect:

• 1+ years of experience with .NET Core, C#, and React
• Good understanding of SQL, REST, JWT/OAuth
• Some experience with Azure or another cloud platform
• A proactive mindset and attention to detail
• Strong English skills
• Full-time availability

Nice to Have:

• Experience with CI/CD, Docker, or microservices
• Interest in improving architecture and performance

We offer:

• Career growth — clear path to advance
• Feedback — regular reviews & support
• Celebrations — gifts for milestones
• Flexibility — remote or hybrid (Lviv office)
• Mentorship — learn from senior experts
• Accounting — full paperwork support
• Time off — 18 vacation + 5 sick days
• Extra leave — +10 days yearly
• Office perks — free lunches
• Team events — gatherings & gifts

We are looking for an enthusiastic and proactive Intern .NET + Angular Developer to join our dynamic team!

Requirements:
— Solid understanding of object-oriented programming (OOP);
— Good knowledge of C#, .Net Standard, .NET 6+, ASP Web API;
— Basic knowledge of Unit testing;
— Basic knowledge of MSSQL;
— Knowledge of Angular(React) + TypeScript;
— Upper-Intermediate English level (both written and spoken);
— Proficiency with Source Control tools such as Git.

Would be a plus:
— Basic understanding of GoF Design Patterns;
— Understanding of microservice architecture;
— Containerization (basics of Docker/Kubernetes) + Azure;
— Attention to details;
— Practice experience in pet projects.

Responsibilities:
— Develop project functionalities;
— Manage databases with MS SQL;
— Implement frontend features with Angular.

We offer:
— 3-month Internship schedule: Monday to Friday, 10.00-19.00;
— Office-based/remote work;
— No time trackers or other bureaucratic measures;
— Practical experience on internal projects;
— Networking with experienced professionals willing to share their knowledge and experience;
— Opportunity to obtain a contract with HYS Enterprise as a Junior specialist;
— Gifts for birthdays and professional holidays;
— Participation in internal and external events.
Upon successful completion of the internship and mutual agreement to proceed with a contract, the candidate is expected to commit to working with us for a minimum of one year.

About your key responsibilities and impact:

• Designing and implementing scalable and efficient software architectures;
• Writing, testing, and debugging complex code for new and existing software applications;
• Providing guidance and mentorship to junior engineers and team members;
• Conducting thorough code reviews to ensure code quality, security, and best practices;
• Creating and maintaining comprehensive technical documentation for software development and system design;
• Leading and managing software development projects, ensuring timely delivery and quality (shared responsibility with the Delivery Manager);
• Working closely with cross-functional teams, including product management, design, and operations, to align development efforts with business goals;
• Researching and implementing new technologies and methodologies to improve software performance and development processes;
• Identifying and resolving complex software issues and technical challenges;
• Driving continuous improvement in software development practices and processes;
• Communicating effectively with stakeholders, including presenting technical concepts and project updates;
• Delivering code to production in a timely manner according to business expectations.

Essential professional experience:

• 5+ years of experience in back end;
• System Design & Architecture – strong experience designing scalable, resilient .NET systems using microservices, event-driven and cloud-native architectures (Azure/AWS);
• Backend Expertise – advanced C# skills, RESTful API development, asynchronous programming, and deep understanding of design and resilience patterns (DDD, CQRS, circuit breaker, etc.);
• Database Mastery – proficiency in SQL optimization, data modeling, indexing, and experience with both relational and NoSQL databases;
• Messaging & Performance – hands-on Kafka expertise, high-load system optimization, caching, and distributed computing;
• DevOps & Cloud – solid experience with CI/CD pipelines, Docker/Kubernetes, and infrastructure automation;
• Quality & Observability – strong focus on testing (xUnit, NUnit), monitoring (Serilog, App Insights), and secure coding practices;
• Leadership & Collaboration – mentoring peers, driving technical decisions, and ensuring engineering excellence within Agile teams;
• Languages – Intermediate+ English, B2+ Ukrainian/Russian

What You’ll Be Driving:

• Leading tech team;
• Server-side developing of products using .NET 8, ASP.NET Core (Web API), EntityFramework Core, Redis, Kafka, PostgreSQL, Elasticsearch, Docker;
• Developing of high-load services;
• Application architecture design;
• Code reviewing and improving the current team's skills;
• Working in close collaboration with others in the team and across the business;
• Closely communicating with BAs and product managers, providing the best solutions and influencing the product.
   

What Makes You a GR8 Fit:

• Knowledge of .NET Core and ASP.NET Core, with 3+ years of commercial development experience;
• Software Design knowledge: SOLID, OOD, Design patterns;
• Experience with SQL, NoSQL database;
• Good understanding of the principles of distributed systems;
• Work experience in Agile environment;
• Experience with CI, UnitTests, Integration Tests;
• Upper-Intermediate+ English level.
   

Desirable skills:

• Experience with high-load projects;
• Experience with RabbitMQ, Redis, Kafka, SignalR;
• Experience with Kubernetes;
• Experience with ELK stack.

Requirements

🔹 5+ років досвіду у Backend розробці на .NET / C#
🔹 Обов’язковий досвід інтеграції з EMR/EHR або interoperability рішень;
🔹 Глибоке знання FHIR / HL7;
🔹 Робота з REST APIs, OAuth2/OpenID Connect;
🔹 Досвід із Azure або AWS;
🔹 English - від В2.

Responsibilities

• Design & development інтеграцій з EPIC / Cerner / Cebro API;
• Healthcare data exchange (FHIR, HL7);
• Security & privacy compliance (HIPAA/GDPR);
• Epic App Orchard / Cerner Ignite досвід;
• Healthcare domain expertise;
• Message queues, microservices, CI/CD;

Hiring Process: HR → Tech → Offer.

🎯 Що важливо:

Ми розглядаємо лише кандидатів з реальним досвідом в healthcare data interoperability
(EMR/EHR, FHIR/HL7 must-have)

About the job

Who We Are
A startup in the field of minimally invasive endovascular decision support, is seeking an experienced Engineering Manager to establish and lead a high-performing software and algorithm team. This role involves nurturing & building a multi-disciplinary team, managing external subcontractors, and driving the development of scalable, high-performance AI-powered solutions for medical technologies.

What Youʼll Do

• Design and implement user-friendly, responsive, and scalable Real-Time front-end applications that integrate seamlessly with Python-based AI models and network services.
• Collaborate with product managers, designers, and back-end engineers to translate requirements into elegant, efficient, and maintainable code, according to best practices of software engineering.
• Writing technical documentation.
• Drive technical decisions on application architecture, frameworks, and tooling for front-end development within a C# and Python environment.
• Optimize application performance, accessibility, and cross-browser compatibility to ensure a best-in-class user experience.
• Contribute to continuous improvement in development processes, including CI/CD, unit testing, production deployment and automation.
• Stay current with emerging front-end technologies and frameworks, and evaluate their potential adoption within the team.

Minimal Requirements

• 5+ years of front-end C# development — must.
• Extensive knowledge of building GUI with WinForms — must.
• Experience with Building Windows Services — must.
• Extensive knowledge of Multi-threading / Multi-Processing / Interprocess Communication — must.
• Extensive knowledge with Message Brokers like RabbitMQ — must.
• Excellent knowledge of software design patterns — must.
• Experience with unit testing — must.
• Experience with maintenance and deployment in C# and Python environments, working with artifactory like Nexus / nuget — must.
• Experience of building windows installers like MSI — must.
• High level of English — verbal & written — must.

Additional (Advantage) Requirements

• Experience with REST — advantage.
• Experience with PyTorch / TensorFlow / scikit-image / matplotlib — big advantage.
• Experience with Python — advantage.
• Experience with cross-platforms application — advantage.
• Experience with Deployment, including CI/CD — advantage.
• Software Engineering / Computer Science Bachelor Degree — advantage.
• Experience with Kiosk mode applications — advantage.
• Medical / healthcare companies experience — advantage.
• Knowledge of security best practices — advantage.

Personal

• Fire-and-Forget attitude.
• Strong sense of ownership and responsibility for both production environments and company IT.
• Detail-oriented mindset with a focus on security, compliance, and reliability.
• Problem-solver able to troubleshoot across DevOps, infrastructure, and IT domains.
• Comfortable working in a startup environment: flexible, hands-on, and willing to switch contexts between R&D support and internal IT.
• Excellent collaboration and communication skills, working closely with engineers, data scientists, clinicians, and non-technical staff.
• Ability to document and enforce policies in a way that balances compliance with usability.
• Proactive learner, always looking to adopt best practices and introduce improvements in DevOps and IT.
• Quick-learner, team player.

Who we are:

Glorium Technologies is an outsourcing company with an HQ in NJ and development centers in Ukraine, Poland, and Cyprus. We were founded in 2010 and have already expanded our team to over 180 sharp-minded people. The majority of our projects are within the Healthcare and Real Estate domains.

We are seeking a Senior .NET Developer with extensive experience in Docker and Kubernetes to lead the migration and deployment processes. The ideal candidate will have in-depth knowledge of .NET to .NET Core migration and will assist in automating deployment from Octopus Deploy to Docker/Kubernetes. You will collaborate with cross-functional teams to deliver high-quality and scalable solutions, playing a key role in modernizing our application infrastructure.

Does this relate to you?

• 5+ years of experience in .NET Development
• Strong knowledge of Docker containerization and deployment
• Hands-on experience with Kubernetes for container orchestration
• Proven experience in migrating projects from .NET Framework to .NET Core
• Strong knowledge of CI/CD pipelines, with a focus on automating the deployment process
• Experience with RESTful APIs, microservices architecture, and modern software design patterns
• Familiarity with AWS and AWS EKS with Karpenter is a plus
• Experience working with Octopus Deploy to manage deployments will be a plus
• Upper-Intermediate English level

This is a long-term Healthcare project involving SaaS application development and maintenance. The project focuses on creating a centralized workflow for processing appointments, invoicing payers and patients, managing documentation, and facilitating medical item deliveries. The software, designed for US-based home medical equipment providers (HME) and hospitals, streamlines daily operations and enhances efficiency.

A new team member will be in charge of:

•  Design, build, and maintain CI/CD pipelines using Octopus Deploy for deploying applications to Docker containers and orchestrating with Kubernetes
• Lead the migration of existing applications from .NET Framework to .NET Core
• Collaborate with DevOps and engineering teams to implement containerization strategies
• Optimize applications for performance, scalability, and security in a Docker/Kubernetes environment
• Troubleshoot and resolve issues related to application deployment, environment configuration, and Kubernetes orchestration

What we offer:

• Fully paid English classes with an in-house English teacher

• 25 paid days off per year in total

• Regular performance reviews

• Training and IT certification

• Special occasion bonuses (birthday, marriage, childbirth)

• Flexible schedule of cooperation with work-from-home or office options

We are looking for a .NET Developer to join our team and help build a modern, scalable platform using .NET 8+, web APIs, Azure cloud services, real-time communication tools, and AI integrations. The role involves backend development, frontend support, cloud infrastructure work, and system performance optimization.

Tech Stack

Backend

• .NET 8+, ASP.NET Web API
• Entity Framework Core
• MediatR (CQRS, request/command pipelines)
• SignalR (real-time communication)
• MySQL, SQL Server
• Redis Cache
• GitHub, GitHub Actions
• OpenAI API

Frontend

• HTML, CSS
• JavaScript / TypeScript
• Vue.js 2/3

Cloud / DevOps

• Azure Storage Accounts
• Azure App Services
• Azure Event Grid
• Azure Key Vault
• Azure Application Insights
• CI/CD pipelines (GitHub Actions)

Testing

• NUnit or xUnit

Responsibilities

• Develop and maintain services using ASP.NET Web API and .NET 8+
• Implement business logic using CQRS patterns and MediatR
• Work with Entity Framework Core, optimize SQL queries, and manage migrations
• Implement real-time features using SignalR
• Use MySQL or SQL Server for application data storage
• Apply Redis for caching and performance optimization
• Integrate with third-party services, including the OpenAI API
• Develop SPA components using Vue.js 2/3
• Work with Azure services such as Storage Accounts, App Services, Event Grid, and Key Vault
• Monitor and analyze system performance using Application Insights
• Write automated tests using NUnit or xUnit
• Participate in code reviews and contribute to CI/CD improvements

Requirements

• Strong experience with .NET and C#
• Practical experience with ASP.NET Web API and .NET 6+ or newer
• Solid understanding of EF Core and relational databases (MySQL/SQL Server)
• Experience using Redis
• Experience with SignalR
• Experience with Vue.js or similar modern JavaScript frameworks
• Practical knowledge of Azure cloud services
• Understanding of CI/CD workflows
• Experience writing unit tests
• Good communication skills and ability to work in a collaborative environment
• English at an intermediate level or above

Nice to Have

• Knowledge of Clean Architecture or CQRS principles
• Experience building scalable cloud applications
• Experience with AI/LLM integrations such as OpenAI
• Understanding of event-driven architecture

We Offer

• Competitive salary
• Remote-friendly work environment
• Opportunity to work with modern technologies and cloud solutions
• Professional growth opportunities
• Long-term project with active technical development

Our client is the leading SaaS provider of independent, highly automated financial aid management software solutions, that support diverse enrollment models for higher education institutions in the U.S. Our client's solutions interoperate with established student information systems to provide institutions with improved efficiencies, and fewer errors, new program growth opportunities, and enhanced financial aid services for students.
 
This position is to join the client's Product Development team, which focuses on delivering high-quality products to our customer base using a fast-paced Agile development model. The Sr .NET Software Engineer will participate in the design, implementation, and testing of multiple SaaS products geared toward the higher education market. Specifically, s/he will:

• Have expert-level knowledge of C#, data structures, and software patterns;
• Develop and automate unit tests;
• Develop queries and stored procedures within SQL Server;
• Contribute feedback and guidance to the development of functional and technical specifications;
• Address software defects with timely resolution;
• Effectively communicate and collaborate with various team members;
• Think outside the box and be able to thrive in a fast-paced environment.

Qualifications:

• 5+ years of experience in the complete software development lifecycle of business-focused software;
• Experience with C#, ASP.net MVC, ASP.net Web API with an understanding of RESTful API concepts and best practices, and SQL Server stored procedures, queries, etc;
• Experience developing software products with complex business rules and requirements;
• Demonstrated ability to work with both technical and non-technical individuals in the development of business systems and providing direction to the development team;
• Demonstrable skills in problem-solving and working in a fast-paced software development environment;
• Must be a team player and have excellent communication skills;
• Attention to detail and a commitment to quality work.

Preferred additional skills:-

• Experience with KendoUI;
• Experience with ReactJS;
• Experience with Azure or other cloud platforms;
• Experience in the Education space and/or with Financial Aid Services/Title IV;
• Experience with SaaS product development;
• Agile, Extreme, and Scrum experience preferred.

We offer:

• Competitive market salary;
• Fully remote work;
• Convenient and somewhat flexible work hours (you will have to work until 20:00 Kyiv time GMT+3, or 1 pm EST);
• 28 days of paid time off per calendar year;
• Working on a very socially valuable product, alongside a highly professional, US-based, international team;
• Interesting challenges and the ability to grow and learn.

We’re looking for a .NET Developer (Mid/Senior)
 

The role combines classic backend .NET development with DevOps/GitOps elements — automation, CI/CD, and infrastructure as code in Azure.

💼 Industry:
IT company delivering CRM/ERP solutions built on leading cloud platforms (mainly the Microsoft ecosystem).

💻 Tech stack / requirements:
Required:
• .NET Azure Development
• Terraform
• Azure Data Factory
• Strong experience with REST API

Nice to have:
• Microsoft Fabric / Dynamics 365 (Customer Engagement / Business Central) – not essential, good understanding of REST API is enough

✨ Key skills:
• Very good English
• Strong soft skills (communication, proactivity, independence)

We are looking for a Senior .NET Developer to join our team on an outsourcing basis. You will be responsible for designing, developing, and maintaining scalable, secure, and high-performance back-end systems for fintech products. The role includes architectural decision-making, solving complex technical challenges, and ensuring high code quality.
 

Project:
A regulated wealth platform that integrates banking, payments, digital assets, and yield products into a single ecosystem. The platform bridges traditional finance and digital markets by combining licensed financial partners with stablecoin infrastructure. It is built on a modular, compliant, and scalable architecture connecting fiat banking, blockchain infrastructure, and off-chain yield engines.

Requirements:

• At least 5 years of professional experience as a Software Developer
• Extensive hands-on experience with .NET / C# development
• Strong expertise in web architecture, microservices, REST APIs, and asynchronous workflows
• Deep knowledge of software design principles and patterns (SOLID, YAGNI, Clean Code)
• Experience designing and maintaining scalable, distributed systems
• Practical understanding of Kubernetes for deploying, scaling, and managing containerized applications in production environments
• Solid experience with SQL and EF Core
• Database experience:
  • SQL: PostgreSQL
  • NoSQL: Redis
• Strong ability to analyze, decompose, estimate, and deliver complex tasks
• Proven ability to write clean, maintainable, and testable code
• Good communication skills and ability to mentor less experienced developers 
  
  What skills will be a plus?
• Cloud: AWS
• Experience with banking or fintech projects
• Experience in working with grpc protocol.

Responsibilities:

• Design, develop, and maintain new features and enhancements for back-end systems.
• Investigate and resolve complex technical issues and bugs in a timely manner.
• Provide accurate task estimations and contribute to project planning.
• Conduct technical investigations and propose effective solutions.
• Collaborate closely with the development team to ensure smooth delivery and knowledge sharing.
• Participate in both verbal and written communication with clients, providing technical expertise and clear status updates.
• Contribute to architectural decisions and promote best engineering practices.
  
   

We have an exciting project with a scaling company headquartered in Europe and providing services that assist sustainable management of various technological devices.

Requirements:

• Location of the candidate must be NOT in Ukraine

• 5+ years of proven work experience as a .Net Developer

• Hands-on experience with Angular is a must (2+ years)

• Proven commercial work experience in software development

• Preferably the candidate has to be open to get the compensation on his Ukrainian Private Entrepreneur account

• Experience of working in multicultural environment

• Experience with pricing and finance would a benefit

• English level — B2

• Ukrainian level - native

Responsibilities:

• Writing clean, maintainable and efficient code

• Designing robust, scalable and secure features

• Contributing in all phases of the development lifecycle

We offer:

• Competitive salary based on your expectation

• Possibility to work remotely

Key Requirements:

- At least 4 years with .net

- At least 2 years of on-hands experience with Umbraco 8 , 9 , 10 versions

- At least B2 English level (C1 will be a HUGE plus)

Key Responsibilities:

* Develop and maintain backend services, APIs, and message-driven integrations.

* Write clean, scalable, and efficient code adhering to coding standards and best practices.

* Participate in the entire application lifecycle, focusing on coding, debugging, testing, and deployment.

* Troubleshoot, debug, and upgrade existing systems to ensure performance, reliability, and security.

We offer:

- Become a part of rapidly growing Ecommerce Agency

- NO russian clients, NO russian colleagues!

- Remote work

- Paid time-off

- Flexible schedule

- Ability for a constant financial and professional growth