Senior Full-Stack Engineer (AI-Native Development)

About the Position

Senior Full-Stack Engineer (AI-Native Development)

We're looking for a Senior Full-Stack .NET Engineer with strong backend and frontend expertise and hands-on experience using AI in software development. You'll join a greenfield product and work across the full development lifecycle, from technical design and implementation to testing and delivery. The role combines.NET, React, and AI-native development practices - we want someone who can use AI effectively to accelerate development while maintaining strong engineering judgment, code quality, and ownership. You'll work closely with architects, product managers, QA engineers, and DevOps engineers to build scalable, production-ready solutions.

About the Project

You'll be joining an online travel platform that takes travelers from hotel search through checkout, currently evolving into a multi-brand merchant-of-record platform integrated with major global hotel supply providers. The project is genuinely greenfield - it's currently wrapping up an initial discovery/elaboration phase, and no application code exists yet. As one of the first engineers on the build, you'll help stand up the first service skeleton, CI/CD pipeline, and cloud landing zone from scratch, on a stack built around.NET/ASP.NET Core services running on GCP (GKE), with Terraform, GitLab CI, and Argo CD driving delivery.

Responsibilities

• Design and develop backend services using C#,.NET, and ASP.NET Core
• Build modern frontend applications with React and TypeScript
• Design and implement scalable APIs and integrations
• Work with relational and NoSQL databases
• Write automated unit and integration tests
• Take part in technical design and architecture discussions
• Partner with DevOps engineers to keep applications containerized, deployed, and production-ready
• Analyze business requirements and translate them into technical solutions and implementation plans
• Use AI coding tools and agents as part of your daily development workflow - for code generation, refactoring, debugging, testing, documentation, and technical analysis
• Review and validate AI-generated code and technical solutions
• Continuously improve development efficiency and quality through AI-native engineering practices

Requirements

• 6+ years of professional software engineering experience
• Strong commercial experience with C# and.NET, including ASP.NET Core and REST APIs
• Strong hands-on experience with React and TypeScript
• Solid understanding of both frontend and backend architecture
• A strong grasp of software engineering fundamentals - clean code, SOLID principles, design patterns, testing, and system design
• Experience with SQL databases, preferably PostgreSQL
• Experience with Docker and containerized applications
• Experience working with GCP or a similar cloud platform
• A strong problem-solving mindset and sense of ownership
• Upper-Intermediate English or higher
• Hands-on experience using AI as part of the software development lifecycle, with tools such as Claude Code, Cursor, GitHub Copilot, Windsurf, or similar
• A good understanding of the capabilities and limitations of large language models (LLMs), including how to prompt and provide context for reliable results
• A willingness to keep adopting and experimenting with new AI-native development practices

Nice to Have

• Experience with NoSQL databases
• Experience building AI-powered features or applications
• Experience working with LLM APIs or AI agents
• Experience with RAG, vector databases, MCP, or similar AI technologies
• Experience with cloud-native and distributed systems
• Experience working on greenfield products
• Experience in travel, OTA, e-commerce, booking, or payment platforms
• Experience working in AI-first or AI-native engineering teams

We Offer

Work-life Balance

• Possibility to work remotely

Health Care

• Reimbursement of medical expenses
• Online morning exercise

Education

• Compensation for trainings, seminars, conferences
• Free access to the Pluralsight and ACloudGuru knowledge base
• Access to the AltexSoft library with top-notch materials
• A mentor for a probation period
• Engagement in our Mentorship Hub program as a mentor or a mentee to foster professional growth and development

Development

• Horizontally - master new technologies at internal courses
• Vertically - choose your own career path through Competency trees

Recognition Program

• All your activities are marked by points that can be exchanged for gifts to fit any taste.

About the Company

We're looking for a Senior Full-Stack .NET Engineer with strong backend and frontend expertise and hands-on experience using AI in software development. You'll join a greenfield product and work across the full development lifecycle, from technical design and implementation to testing and delivery. The role combines.NET, React, and AI-native development practices - we want someone who can use AI effectively to accelerate development while maintaining strong engineering judgment, code quality, and ownership. You'll work closely with architects, product managers, QA engineers, and DevOps engineers to build scalable, production-ready solutions.

To many people, the world is chaos. To us, it's something a few effective formulas can organize and even change.

Come along if you share our vision

• We were founded in 2007. Employer of the Year (2014, 2017, 2019).
• The AI Ukraine conference and the Know Your Onions meetups organizer.
• R&D centers in Ukraine (Kharkiv, Kremenchuk, Lviv) and Georgia (Tbilisi). We employ more than 300 people.