Jobs C# / .NET

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.

The product that needs your engagement

The role is open as we grow the team building our new greenfield platform. We have invested in defining the architectural foundation upfront — including the layered structure, module boundaries, and core contracts — and are now moving into implementation. The first product built on this platform is an enterprise B2B offering at the intersection of AI and corporate data infrastructure. It enables organizations to securely connect modern AI agents and LLM-based assistants to their internal data sources — such as relational databases, data warehouses, and SaaS systems — while maintaining strict governance, access control, and auditability. A defining constraint is that data never leaves the customer’s perimeter: the product can be deployed fully on-premise within the customer’s infrastructure, which makes security, compliance, and admin experience first-class concerns alongside end-user value.

Your future team of professionals

You will join an ambitious and growing team that values collaboration, ownership, and thoughtful engineering. You will report directly to the Software Architect, and work alongside Frontend and QA Engineers on the team. Beyond your immediate team, you will interact closely with the Head of Engineering, and collaborate cross-functionally with a Product Manager, as well as with the Lead Engineering Manager of the team responsible for the engine and connectors that the platform builds on.

Your future challenges & opportunities
We are looking for someone strong in zero-to-one engineering who is comfortable working spec-first and ready to take ownership of key parts of the platform as it evolves from architecture into a working product.

Impact you will make 

• Build and maintain back-end modules and APIs using C# and the .NET ecosystem.
• Implement functionality within clearly defined architectural boundaries while contributing to their evolution where needed.
• Design clean and reusable contracts between modules and components.
• Develop secure, reliable, and testable server-side components following SOLID principles and established design patterns.
• Identify and resolve performance, scalability, and reliability issues.
• Work closely with frontend developers to design and integrate RESTful or GraphQL APIs.
• Write automated tests and ensure production-ready quality of delivered functionality.
• Participate in code reviews, technical discussions, and system design decisions.

Skills we are looking for 

• 5+ years of commercial experience with C# and the .NET ecosystem, including ASP.NET Core and Entity Framework Core.
• Strong understanding of OOP, SOLID principles, dependency inversion / IoC, design patterns, and client-server architecture.
• Experience designing clear interfaces, contracts, and boundaries between application components.
• Experience designing and building REST APIs.
• Strong experience with relational databases such as SQL Server or PostgreSQL and ORM tools such as Entity Framework Core.
• Understanding of authentication and secure application development, including OAuth 2.0 and JWT.
• Experience with automated testing using frameworks such as xUnit or NUnit and mocking tools such as Moq.
• Experience with Git-based development workflows, including pull requests and code reviews.
• Practical knowledge of Docker / Docker Compose and basic CI/CD practices.
• Experience profiling .NET applications, identifying bottlenecks, and improving application performance.
• Practical experience using AI-assisted development tools such as GitHub Copilot or ChatGPT, with an understanding of their limitations and appropriate use.

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
• Test Task
• 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.

About the role:

Are you a hands-on .NET engineer who has grown into technical leadership and wants to make a real difference in healthcare? We are looking for someone who can own the technical direction of a large .NET production system, keep quality high, and increasingly guide how the product evolve and adopts AI and agentic capabilities.

You will work on the .NET Core production of a large system alongside a strong and friendly team. You will spend most of your time on architecture, design, and coding, with a meaningful slice of team-lead responsibility — mentoring engineers, contributing to estimation and planning, and coordinating technical work across the back-end team. This is a tech lead role with *some* team lead responsibilities, not a pure management position.

Team: 5 back-end and data engineers, 1 front-end engineer, and 4 QA/BA.

Skills & Experience:

- Background in software engineering; a degree in Computer Science or a related technical discipline;

- 7+ years of commercial experience with .NET (strong .NET Core, ASP.NET Core);

- Proven track record as a technical owner — architecture, design decisions, and hands-on delivery on large, long-lived systems;

- 3+ years of leadership experience (tech lead, senior/mentor role, or similar) — comfortable guiding engineers with and without being a full-time people manager;

- Strong SQL skills (understanding of how SQL queries work in order to suggest consistent engineering solutions);

- Experience with large enterprise projects;

- In-depth understanding of Entity Framework / EF Core;

- Solid grasp of testing discipline — unit, integration, and performance testing as part of the development process;

- Self-starter who's able to see a piece of work through from A to Z;

- Upper-intermediate English or above.

Nice to have:

- Practical exposure to building or integrating AI/agentic features into production applications (LLM APIs, tool calling, RAG, or similar);

- Azure DevOps skills and CI/CD experience (Azure DevOps / GitHub Actions);

- Advanced front-end JS skills;

- Experience with JS frameworks (React / Angular / Ember, etc.);

- Experience in building SPAs;

- Experience in a regulated domain (healthcare, life sciences) and awareness of data-privacy/compliance considerations;

Responsibilities:

Technical leadership

- Own the technical design and architecture of back-end and AI/agentic components; make and document pragmatic build/buy and framework decisions;

- Stay hands-on: participate in design, development, and integration, and write production code for the most critical or complex parts of the system;

- Define, advocate, and enforce best practices and coding standards; lead code review and refactoring;

- Cover code with unit, integration, and performance tests, and build evaluation/testing approaches for AI-driven features;

- Investigate performance bottlenecks and drive code optimization proactively;

- Be a key contributor to new release deployments and the technical health of the delivery pipeline.

Team lead responsibilities 

- Mentor back-end engineers and help grow their .NET, SQL, and AI/agentic capabilities;

- Help distribute and coordinate back-end technical work; provide direction on how work should be built;

- Participate in grooming, estimation, and planning sessions; help plan and implement change requests;

- Support product owners and stakeholders in making sound technical decisions, and provide status updates on back-end development when needed;

- Collaborate with other team members and roles (front-end tech lead, TDM, BSA, architect, DevOps, DBAs, etc.) and troubleshoot issues as they arise.

Join a product-focused engineering team developing solutions for the European construction industry. We are looking for a Middle/Senior .NET Developer who is ready to contribute not only to implementation but also to architecture discussions, technical improvements, and product evolution.

CUSTOMER

Our Customer is a European technology company specializing in solutions for construction site security, access management, and operational transparency. Over the past 15+ years, the company has evolved from a smart-lock product into a large ecosystem of web, mobile, and server-side solutions supporting construction businesses across Europe. The engineering organization includes distributed international teams and long-term collaboration with Sigma Software specialists.

PROJECT

The project is part of a large-scale product ecosystem designed for the European construction market. The platform helps construction companies manage access control, subcontractor relationships, security compliance, and operational risks across construction sites.

In this role, you will contribute to a system focused on analyzing companies involved in the construction process. The product enables site operators to monitor subcontractors, maintain compliance standards, and reduce long-term reputational and operational risks. 

Project technologies: C#, .NET, REST APIs, SOAP, MS SQL Server, Entity Framework, Kafka, Angular, TypeScript, Azure.

Job Description

• Design, develop, and maintain robust Back-end solutions using C# and .NET
• Participate in architecture discussions and contribute to technical solution design
• Develop and integrate RESTful APIs and SOAP web services
• Work on core modules development and perform refactoring when necessary
• Collaborate closely with developers, QA engineers, DevOps specialists, architects, and Product Owners
• Clarify business and technical requirements with internal and Customer-side teams
• Write and maintain unit, API, and integration tests
• Participate in peer code reviews and follow engineering best practices
• Investigate and introduce new technologies and technical improvements
• Troubleshoot issues across application, infrastructure, and database layers
• Prepare and maintain technical documentation
• Contribute to Front-end-related tasks using Angular and TypeScript when needed

Qualifications

• 4+ years of commercial software development experience with C# and .NET
• Strong experience designing, developing, and integrating Web APIs, including RESTful APIs and SOAP services
• Solid understanding of OOP, SOLID principles, and common design patterns
• Strong knowledge of Microsoft SQL Server and T-SQL
• Practical experience with LINQ, ADO.NET, and Entity Framework
• Experience working with event-driven systems and message brokers
• Experience writing and maintaining unit, API, and integration tests
• Experience with Angular or another modern Front-end framework/library
• Good knowledge of TypeScript
• Understanding of Front-end architecture, maintainability, and performance optimization
• Strong troubleshooting and debugging skills across application, database, and infrastructure layers
• Confident Git usage, including branching strategies, pull requests, and code reviews
• Intermediate or higher English level
• Strong communication skills and ability to work collaboratively in a cross-functional environment

Wіll be a plus:

• Experience with NoSQL databases
• Experience using AI-assisted development tools such as GitHub Copilot or Claude

On behalf of our Client from France, Mobilunity is looking for an Azure DevOps Engineer.

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.

What you will do:

• Performance and stability work: Identify and resolve issues currently degrading the platform — missing or wrong SQL indexes on hot tables, N+1 Cosmos queries, EF Core query plans that fall off the optimiser, queue back-pressure, retry storms.
• Incident response: Act as the escalation point for the product support and dev team. Diagnose and fix issues spanning bookings, widgets, payments (Mollie / Bancontact / iDEAL), webhooks, SignalR notifications, Cosmos DB content, and SQL Server data.
• Production stewardship: Plan and execute releases to production, typically out of customer hours (releases usually go out late evening or around 2 a.m. CET to minimise blast radius). Own rollback strategies and smoke tests.
• Platform upgrade: Plan and execute upgrades to .NET, key NuGet packages (including private feeds), Azure services, and third-party integrations — without disrupting production.
• Targeted feature development: Pick up scoped backend features and changes and ship them safely.
• Internal tooling: Maintain and extend admin site
• Knowledge transfer: We want this role to actively reduce single-point-of-failure risk. You’ll pair with internal engineers, walk them through the system as you fix things, and leave behind enough context — in code comments, PR descriptions, short notes — that the platform is operable when you’re on holiday.

Tech Stack:

• .NET / C# (modern versions), Entity Framework Core, ASP.NET Web APIs
• Azure — App Service, Functions, SignalR Service, Service Bus / queues, Application Insights
• SQL Server (Azure SQL) with EF Core, plus direct query and index tuning
• Cosmos DB
• GitHub (Actions, private NuGet feeds), pre-prod and prod environments
• Mollie payments (Bancontact, iDEAL, cards) and other third-party integrations

Requirements:

• Deep Azure production ownership — ideally 8+ years where both the application layer and the cloud infrastructure are your domain. Azure is not a deployment target here — it’s part of the system you own.
• Strong DBA instincts. You can read an execution plan, recognise when EF Core is generating something the optimiser can’t use, and design indexes that match access patterns.
• Azure platform depth. Hands-on production experience with App Service / AKS, Azure SQL, Cosmos DB, Service Bus, Application Insights, and Key Vault. You know how to right-size resources, contain costs, and respond to platform-level incidents — not just application-level ones.
• Production maturity. Comfortable owning overnight releases, rollback plans, and the weight of a system where mistakes affect real restaurants in the morning service.
• Diagnostic mindset. At home in Application Insights, SQL DMVs, Cosmos metrics, and logs. Able to find root causes in a codebase you didn’t write, with significant historical complexity.
• Genuine AI-assisted developer. You use Claude Code, Cursor, Copilot, or equivalent daily — not occasionally. You know where the guardrails matter in a complex codebase, and you bring that judgment, not just the tool.
• Communication. Clear written English, transparent about risk, comfortable explaining technical trade-offs to non-technical stakeholders.
• Upper-intermediate to advanced English proficiency

Nice to have:

• Experience with restaurant tech, reservation systems, or any high-concurrency consumer-facing platform with payment flows.
• Experience leading the stabilisation or modernisation of a legacy .NET codebase.
• Familiarity with Mollie or similar PSPs and EU payment methods (Bancontact, iDEAL, SEPA).

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

N-iX warmly welcomes an experienced Senior Full Stack .Net Engineer to join our talented team.  

Our client brings extensive experience to EHR implementation and workflow redesign to improve clinical care. The company evolved as clinical needs and technology became more sophisticated, and with that, a greater demand for the ability to move health information efficiently and effectively. Our team provides unmatched expertise in interoperability, health information exchange and Direct services. 

Responsibilities:

• Write application, service, and system code following SES secure coding guidelines.
• Code, test, and troubleshoot applications and services using appropriate technologies and tools.
• Maintain and enhance existing applications by modifying program specifications, designing detailed programming logic, and implementing approved changes.
• Translate logical system and application specifications into physical system and application design
• Evaluate complex interdependencies between applications and services to ensure that changes in one do not cause unintended effects in others
• Write and execute unit tests; contribute to automated testing efforts to ensure software quality.
• Assess and implement improvements to processing efficiency within application systems. Analyze performance of applications and take action to correct deficiencies.
• Contribute to the development and maintenance of CI/CD pipelines to enable efficient, reliable, and secure build, test, and deployment workflows.
• Design infrastructure using Terraform as Infrastructure as Code (IaC), ensuring scalability, repeatability, and version control of environment configurations.
• Write and maintain comprehensive application and system documentation.
• Collaborate with team members and users to gather requirements, handle change requests, and develop effective solutions.
• Help define user stories and develop detailed plans to guide the team’s work.
• Participate in Agile development processes, contributing to sprints and collaborating with team members.
• Provide input during planning sessions and support team goals.
• Actively learn and apply new technologies to enhance user experience and improve productivity.

• Mentor junior members of the development team.

   

Requirements:    

• 7+ years of commercial experience developing applications in a Microsoft, .Net, or web services environment.
• 5+ years of hands-on experience developing solutions using .Net technologies and frameworks, particularly Dapper, Entity Framework, or similar ORM frameworks.
• 5+ years of experience with C#.
• 2+ years of experience with front-end technologies such as React, jQuery, jQuery UI, and AJAX.
• 3+ years of experience working with AWS (e.g., S3, Lambda, RDS, DynamoDB, SQS, OpenSearch). Experience with Azure or other cloud providers is a plus.
• Experience with relational databases (e.g., PostgreSQL) and exposure to NoSQL databases.
• Familiarity with continuous integration and delivery (CI/CD) pipelines and tools (e.g., GitHub Actions, Jenkins, GitLab CI, or AWS CodePipeline).
• Hands-on experience using Terraform for Infrastructure as Code to manage cloud resources in AWS.
• Experience using Visual Studio and GitHub for development and version control.
• Experience with front-end technologies such as React, jQuery, jQuery UI, and AJAX.
• Experience interpreting software specifications and participating in the design, development, and testing process.
• Experience developing high-throughput transactional systems, handling concurrency in distributed applications.
• Hands on experience designing cloud architectures, microservices, or event-driven architectures and distributed systems
• Ability to quickly learn and adapt to SES environment and clinical data exchange standards.
• Excellent problem-solving abilities and a willingness to continuously learn.
• Strong organizational skills with the ability to prioritize tasks, meet deadlines, multitask, and pay close attention to detail.

• Strong verbal and written communication skills, with the ability to ask insightful questions and actively listen.

   

Would be a plus:

• HIPAA Awareness
• AWS Certified Solutions Architect - Associate or others
• Familiarity with encryption, digital signatures and Microsoft Crypto API
• Python knowledge
• Familiarity with healthcare data integration technologies (e.g., HL7, JSON, XML), and an understanding of interoperability standards and SQL/database principles.

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

Stellar Logic specializes in custom IT solutions for international clients. We help businesses build internal systems and enterprise software that power their operations — from complex business logic to full-scale automation.

We’re looking for a hands-on Team Lead / Senior Full-stack .NET Developer to join an existing engineering team and help strengthen technical ownership, delivery clarity, and client communication.

This role is for someone who enjoys staying close to the code, but also wants to influence technical decisions, guide other developers, improve engineering standards, and act as a reliable technical point of contact.

What You’ll Do

Hands-on Development: Build and improve backend and frontend parts of the system using .NET / C# and Angular.

Technical Leadership: Take ownership of technical decisions, code quality, implementation approaches, and engineering standards.

Team Coordination: Support planning, estimation, task decomposition, code reviews, and technical alignment within the team.

Architecture: Participate in system design, distributed architecture, integrations, scalability, and maintainability improvements.

Cloud & Infrastructure: Work with cloud environments, Kubernetes, CI/CD, and infrastructure-related tasks.

Client Communication: Communicate directly with the client on technical topics, clarify requirements, explain risks, and propose solutions.

Mentoring & Support: Help developers of different seniority levels through technical guidance, knowledge sharing, and practical support.

What We’re Looking For

Must-have:

• 5+ years of commercial software development experience
• Strong hands-on experience with .NET / C#
• Practical experience with Angular
• Experience with APIs, integrations, backend services, and complex business logic
• Experience with relational and/or NoSQL databases, ideally PostgreSQL and/or MongoDB
• Understanding of distributed systems, scalability, maintainability, and technical trade-offs
• Experience with cloud environments, preferably Azure and/or AWS
• Understanding of CI/CD processes and modern development workflows
• Previous experience as a Team Lead, Tech Lead, Lead Engineer, or in a role with similar technical responsibility
• English B2+ for direct communication with international clients
• Ownership mindset: ability to take responsibility for technical decisions, delivery risks, and the final result

Will be a plus:

• Experience with Kubernetes, Azure DevOps, Terraform / ARM / CloudFormation
• Experience with retail, e-commerce, logistics, supply chain, pricing systems, or internal enterprise systems
• Experience working in outsourcing / outstaffing or another client-facing environment
• Experience mentoring developers or coordinating a small engineering team

Why Work with Us?

🛠 Built around custom solutions
At Stellar Logic, we work on systems shaped around real business processes, not templates. Our projects often involve complex logic, integrations, internal workflows, and product decisions that require thoughtful engineering.

🎯 Small teams, meaningful ownership
You won’t be one of many people in a large structure. We work in focused teams where each person has visible impact, takes ownership of their part, and can influence both technical and product decisions.

⭐ Quality over quick fixes
We care about building software that is clear, reliable, and maintainable. Good engineering for us means understanding the problem, thinking through the solution, and delivering work that the team can build on.

🤝 Close collaboration with clients and teams
Our work requires direct communication, trust, and context. You’ll collaborate closely with people who care about the result — from engineers and designers to business stakeholders.

🚀 Room to grow with responsibility
Growth at Stellar Logic comes through ownership: taking on more complex tasks, leading initiatives, improving processes, mentoring others, or deepening your technical expertise.

What We Offer

Remote-first cooperation: Work from anywhere while staying connected with your team and international clients.

Flexible working hours: We value autonomy and trust, with core meetings for team and client alignment.

Paid vacation and sick leave: We support a healthy balance between work, rest, and personal life.

Tax and accounting support: We help with the administrative side so you can focus on your work.

Professional development: We support learning, certifications, and growth within your role.

Long-term collaboration: We aim to build stable cooperation, transparent communication, and a working environment where people can do their best work.

Not Meeting Every Skill?

Don’t worry if you don’t match every single requirement.
If your experience is close to what we’re looking for, you enjoy solving complex problems, and you’re ready to take ownership, we’d still be happy to talk.

The Defense Procurement Agency (DOT) is a state-owned enterprise responsible for procuring military equipment, ammunition, UAVs, fuel, food, clothing, and other critical supplies for the Armed Forces of Ukraine and the Defense Forces.

Our mission: Strengthening Ukraine's defense capabilities by ensuring reliable procurement and supporting the development of the national defense industry.

Our vision: To become the driving force behind a modern defense procurement ecosystem built according to NATO standards.

We are looking for an ERP Developer (.NET) to help develop, maintain, and enhance our corporate ERP platform, automate business processes, build system integrations, and ensure the stable operation of mission-critical enterprise services.

Responsibilities

• Develop, maintain, and improve the corporate ERP system according to business needs.
• Analyze business requirements and participate in solution design and technical implementation.
• Configure and support business processes, workflows, documents, directories, reports, and approval routes.
• Develop and maintain integrations with internal and external systems using APIs, databases, file exchange, and other integration mechanisms.
• Work with relational databases, write and optimize SQL queries, validate data integrity, and troubleshoot data issues.
• Participate in testing, release management, incident investigation, bug fixing, and production support.
• Create and maintain technical documentation for implemented features, integrations, configurations, and data processing logic.

Requirements

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 2+ years of experience working with ERP or enterprise information systems.
• Experience analyzing business requirements and configuring business processes, workflows, documents, reports, or approval routes.
• Strong SQL skills and hands-on experience with relational databases.
• Understanding of system integration principles and experience with APIs or other data exchange mechanisms.
• Basic knowledge of C#/.NET or another backend technology is a plus.
• Experience with testing, troubleshooting, and technical documentation.
• Strong analytical and problem-solving skills.
• Attention to detail and commitment to system reliability and software quality.
• Willingness to work with both new development and legacy systems.
• Strong communication skills and ability to collaborate with technical teams and business stakeholders.
• Ability to work independently and take ownership of assigned tasks.
• Zero tolerance for corruption.

Nice to Have

• Hands-on experience with IT-Enterprise ERP.
• Experience developing or supporting IT-Enterprise modules.
• Experience automating document management and approval workflows.
• Experience with procurement, finance, warehouse, inventory, or accounting processes.
• Experience working in government institutions or large enterprise environments.

What We Offer

• Work that directly contributes to strengthening Ukraine's defense capabilities.
• Official employment with competitive salary and full social benefits.
• Professional development, learning opportunities, and career growth.
• Structured onboarding and dedicated mentorship.
• A collaborative, supportive, and mission-driven team.
• Modern office near the metro with reliable internet and equipped shelter.
• Opportunity to work on large-scale enterprise systems with real national impact.

By joining our team, you will contribute to one of Ukraine's largest digital transformation initiatives in the defense sector and help build the future of defense procurement.

Ready to make a real impact? We'd love to hear from you. Apply today!

* By submitting your CV, you consent to the processing of your personal data in accordance with applicable legislation.

** Due to the high volume of applications, only candidates whose qualifications best match the position will be contacted.

Codebridge is looking for a talented Junior .NET Developer to create the plugins for integration with the third-party services, compose the documentation for those plugins and help customers with plugins usage and workflows. 

Working Hours: 
5:00 PM – 2:00 AM Kyiv time (EET/EEST), aligned with Los Angeles business hours. 
 
Responsibilities: 

• Develop web-based applications based on .NET Core 
• Create plugins for integration with third-party services 
• Customize existing applications for customer needs 
• Communicate with stakeholders, provide support with building workflows for customers, help troubleshoot issues for end-users 
• Handle customer issues: understand the problem, reproduce it, fix minor bugs (with AI help), or escalate to the day team with clear documentation 
• Create the documentation 

Requirements: 

• Knowledge of C#, .NET Core (ASP.NET Core is a plus) 
• Knowledge of GitHub 
• 0.5+ years of commercial web development experience 
• Basic understanding of OOP and design patterns 
• At least Upper-Intermediate English for customer communication 
• Comfortable using AI tools (Cursor/Claude Code/GitHub Copilot, etc.) to help with debugging and coding 
• Motivated to learn and write quality code 

We Offer: 

• Collaborative Environment: Join a team that values collaboration, creativity, and mutual respect 
• Long-term Stability: A long-term, stable engagement on an AI product, working closely with an international client and development team 
• Cutting-Edge Tools: Access to premium AI tools (Cursor Pro / Claude Code / GitHub Copilot, etc.) 
• Career Growth: Performance reviews and constructive feedback 
• Generous Time Off: 20 paid vacation days and 15 sick leave days annually, ensuring you have the time to recharge 
• Professional Development: We support your growth by compensating for courses, certifications, and other educational opportunities 
• Flexible Work Options: Work remotely from the comfort of your home  

Recruitment Process: 
1. Initial Screening (Application Form) 

2. HR Interview 
3. Tech&Final Interviews 
4. Job Offer   

If you have any questions or need clarifications, feel free to reach out to our Talent Hunter Team by email. 

Наш клієнт, Growe, провідна консалтингова компанія та група сервісів у сфері iGaming і розваг. Вони створюють стратегії, що працюють, та рішення, які масштабуються. 

Ідеально для тих, хто прагне:

• Аналізувати та покращувати проектування системи для виявлення та усунення вузьких місць у продуктивності;
• Аналізувати завдання, розкладати їх на підзадачі та оцінювати час розробки;
• Виконувати рев'ю коду та дизайну;
• Керувати дослідженнями та зразками концепцій (POC) нових функцій;
• Допомагати з прототипуванням нової архітектури та міграцією на неї;
• Визначати області для покращення та керувати технічним боргом;
• Наставляти та керувати командою інженерів-розробників BE, сприяючи культурі технічної досконалості, безперервності розробки та високого рівня відповідальності;
• Підтримувати поточну функціональність та зворотну сумісність для релізів;
• Надавати виконані завдання для тестування та консультаційну допомогу QA під час тестування.

Досвід, який стане твоєю перевагою:

• 5+ років досвіду веб-розробки .NET;
• 2+ роки на посаді технічного керівника;
• Експертиза та глибоке розуміння технологій .NET 6+, ASP.NET Core та C#;
• Досвід роботи з мікросервісною архітектурою;
• Досвід роботи з широким спектром принципів та технологій бекенд-архітектури;
• Досвід роботи з SSE, Long Polling, WebSockets;
• Досвід роботи з модульними та інтеграційними тестами;
• Досвід роботи з GitLab CI або іншими технологіями CI/CD;
• Досвід роботи в процесі Agile/Scrum розробки;
• Досвід роботи з Kafka (буде перевагою);
• Гарне володіння письмовою та розмовною англійською мовою.

Ми цінуємо:

• Проактивне та орієнтоване на результат мислення;
• Хороші комунікативні навички;
• Багатозадачність, навички управління часом та планування;
• Бажання навчатися.

Наші клієнти пропонують конкурентні переваги для підтримки вашого професійного та особистого зростання, зокрема:

• Орієнтація на здоров’я та добробут;
• Глобальне медичне страхування;
• Можливості для зростання;
• Програми бенефітів (компенсація спорту / стоматології / психолога тощо);
• Бонуси за досягнення результатів;
• Динамічне робоче середовище.

English version:

Our client, Growe, is a leading business advisory and services group in iGaming and Entertainment. Сreators of strategies that work and solutions that scale. 

Perfect for those who aim to:

• Analyze and tune system designs to identify and fix performance bottlenecks;
• Analyze tasks, decompose them into sub-tasks, and estimate the development time;
• Perform code & design reviews;
• Lead research and POCs of new features;
• Help with new architecture prototyping and migration on it;
• Identify areas for improvement and manage tech debt;
• Mentor and guide an engineering team of BE developers, fostering a culture of technical excellence, continuous delivery, and high ownership;
• Support the current functionality and maintain backward compatibility for the releases;
• Deliver completed tasks for testing and provide advisory assistance to QAs during testing.

Experience you’ll need to bring:

• 5+ years of .NET web development experience;
• 2+ years in a Tech Lead position;
• Expertise and deep understanding of .NET 6+, ASP.NET Core, and C# technologies;
• Experience with microservices architecture;
• Experience with a breadth of backend architecture principles and technologies;
• Experience with SSE, Long Polling, WebSockets;
• Experience with Unit and Integration tests;
• Experience with GitLab CI or other CI/CD technologies;
• Experience working in an Agile/Scrum development process;
• Experience with Kafka (will be a plus);
• Good written and spoken English.

It's a perfect match if you have those personal features:

• Proactive and result-oriented mindset;
• Good communication skills;
• Multitasking, time management, and planning skills;
• Desire to learn.

Our clients offer competitive benefits to support your professional and personal growth, including: 

• Health & Wellness Focus;
• Global Medical Coverage;
• Growth Opportunities;
• Benefits Programs (compensation for the gym/stomatology/psychological service & etc.);
• Performance-Driven Rewards;
• Dynamic Work Environment.

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 · 1+ 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

→ 2+ 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.

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.

About Us

DNSai LLC is an independent technology company focused exclusively on building practical, high-performance tools for understanding and working with the Domain Name System (DNS). We are not an email security company. DNSai is a Cyber Security DNS Utility, a purpose-built set of utilities that make DNS data easier to access, interpret, and apply to real-world workflows across IT, security operations, research, and digital operations.

We are looking for a highly skilled and motivated Senior C#/.NET Full Stack Engineer with extensive experience across the C#/.NET ecosystem, AWS, Azure, Docker, and Kubernetes to join our growing team. You will play a key role in developing and maintaining both frontend and backend systems behind our DNS utilities — services that must stay fast, accurate, and reliable while processing large volumes of DNS data.

Responsibilities

• Design, develop, and maintain scalable and secure applications and DNS utilities using C# and .NET technologies.
• Build and maintain cloud-based infrastructure on AWS and Azure for high-throughput, low-latency DNS data processing.
• Develop and implement RESTful APIs that expose DNS lookup, enrichment, and analysis capabilities to internal and external consumers.
• Collaborate with product, research, and design teams to turn complex DNS data into clear, usable tooling.
• Utilize Docker and Kubernetes to containerize applications and ensure smooth deployment pipelines.
• Troubleshoot, debug, and optimize applications for performance and reliability at scale.
• Write efficient, maintainable, and testable code following best practices.
• Participate in code reviews and ensure adherence to coding standards.
• Implement CI/CD pipelines to streamline deployments using AWS and Azure services.
• Ensure security and data protection across applications and services, in line with the expectations of a cyber security utility.
• Stay up-to-date with DNS standards, security trends, and platform technologies to enhance development practices.
•  

Requirements

• Proven experience as a Full Stack Developer, with a focus on C# and .NET technologies.
• Solid understanding and hands-on experience with AWS and Azure cloud services.
• Expertise in containerization technologies such as Docker and Kubernetes.
• Strong experience with SQL and NoSQL databases (e.g., SQL Server, MongoDB).
• Familiarity with frontend technologies (e.g., JavaScript, React.js, Angular) is a plus.
• Experience in building and consuming RESTful APIs.
• Knowledge of version control systems like Git.
• Strong problem-solving skills and the ability to debug complex issues.
• Familiarity with agile methodologies and CI/CD processes.
• Excellent communication and collaboration skills to work with cross-functional teams.

Preferred Qualifications

• Working knowledge of DNS concepts and protocols (record types, resolvers, zone data, DNSSEC, passive DNS), or a strong interest in learning them quickly.
• Experience with microservices architecture and serverless computing.
• Familiarity with DevOps practices and infrastructure-as-code tools (e.g., Terraform).
• Understanding of security best practices and cloud-native security services.
• Experience with high-volume data pipelines or network/telemetry data.
• Experience with testing frameworks (unit, integration, and UI testing).

Why DNSai?

• Competitive salary and flexible payment method.
• Deep, focused work in a single problem domain — DNS — rather than scattered consulting projects.
• Opportunities for growth and professional development.
• Flexible working hours and full remote work opportunity.
• Work in a collaborative, innovative and inclusive environment.

We are looking for a Middle .NET Developer to join our team and work on an exciting FinTech project. You'll collaborate with experienced engineers to build scalable, secure, and high-performance backend solutions.

Responsibilities:

• Develop and maintain backend services using C# and .NET.
• Design and implement RESTful APIs.
• Participate in architecture discussions and code reviews.
• Collaborate with cross-functional teams to deliver high-quality software.
• Write clean, maintainable, and well-tested code.
   

Requirements:

• 3+ years of commercial experience with C#/.NET.
• Strong knowledge of .NET Core / .NET 6+ and ASP.NET Core.
• Experience with REST APIs.
• Solid understanding of SQL databases (MS SQL Server or PostgreSQL).
• Experience with Entity Framework Core.
• Knowledge of OOP, SOLID principles, and design patterns.

Nice to Have:

• Docker and Kubernetes.
• Azure or AWS.
• Experience with microservices.
• Previous experience in the FinTech domain.

We Offer:

• Remote work and flexible working hours.
• Legal support.
• Paid sick leaves.
• Paid vacations.
• Medical insurance. 
• Free English classes.

TemaBit Fozzy Group is an IT company that develops unique solutions for more than 40 businesses of Fozzy Group. We specialize in web and mobile development, as well as software for managing business processes and infrastructure projects.

In addition, we experiment and care about the team and the Guest, we value cooperation, we preach honesty and openness.

You will play a major role in our engineering team by designing, developing, and maintaining high-quality backend systems and applications. Your expertise in .NET and Cloud Native development, coupled with a solid understanding of backend architectures, will drive the creation of scalable, efficient, and secure software solutions.

In this role, you will also leverage modern AI-powered tools and practices to improve productivity, code quality, and decision-making across the software development lifecycle.

Key Responsibilities:

• Develop backend systems using .NET (with focus on Cloud Native development), ensuring code quality, performance, and scalability
• Collaborate within cross-functional engineering team to design and develop high-quality web applications
• Drive engineering excellence by adopting and following engineering best practices in your team
• Participate in the entire software development lifecycle, from concept to deployment
• Contribute to the architecture and implementation of scalable and efficient solutions
• Support junior and middle developers, guiding them through code reviews, and fostering a culture of continuous learning and improvement
• Leverage AI-driven tools (e.g., GitHub Copilot, Amazon Q, ChatGPT) to assist in coding, documentation, testing, troubleshooting, and optimizing development workflows
• Promote responsible and ethical AI usage, ensuring compliance with company policies and data privacy standards

Requirements:

• 4+ years of .NET development
• Proficiency in .NET 8+
• Experience using AI-powered development tools to enhance productivity, code quality, and testing efficiency
• Experience of AWS Cloud Native development, familiarity with AWS services (i.e. Lambda, API Gateway, S3, Fargate)
• Track record of implementing microservices based back-ends
• Knowledge EF Core / RDS Postgres
• Knowledge of messaging (preferable Kafka) 
• Knowledge of DDD, Event Sourcing, CQRS
• Understanding of relational and non-relational databases
• Experience with Unit/Integration testing
• Experience with containerization technologies (Docker)
• Understanding of Infrastructure as Code principle (experience with CDK will be a plus)
• Understanding of Agile/Scrum methodologies and experience working in an Agile environment
• Intermediate/B1 English Level, ability to read & write tech documentation
• Strong communication skills

Nice-to-have Skills & Experience:

• Experience building Gitlab CI/CD pipelines
• Experience with DynamoDB
• TypeScript

We propose:

• The ability to generate and influence decision-making
• Competitive salary discussed based on the results of the interview with the successful candidate
• Medical insurance
• Discounts for network employees
• Remote work mode, and if you want to work in the office — there is a cozy co-working space in the Silver Breeze business center in Kyiv

Requirements:
• 5+ years of experience designing, building, and operating production-grade serverless applications on AWS
• Strong hands-on experience with AWS CloudFront, API Gateway, Lambda, Cognito, and DynamoDB
• Proven experience deploying and managing infrastructure across multiple AWS regions
• Solid Infrastructure as Code expertise using Pulumi or Terraform
• Experience with near-real-time event streaming and push notification systems
• Strong knowledge of CI/CD pipelines, release management, rollback strategies, and multi-environment deployments
• Strong software engineering fundamentals (IoC, DRY, KISS, Single Source of Truth)
• Experience creating integration and end-to-end tests for backend, frontend, and infrastructure components
• Experience working with AI-powered development tools, prompt engineering, and multi-agent systems
• Strong troubleshooting and performance optimization skills in distributed, event-driven architectures
• English: Upper-Intermediate +

Nice to have:
• Experience with AI-driven multi-agent orchestration and conversational platforms
• Commercial experience with C#, Rust, and/or Flutter
• Experience using Pulumi with C#
• Background in EdTech, audio/video streaming, or real-time communication platforms