Backend Developer (Python/.Net, Junior/Senior)

Company information

Headquartered in Massachusetts, USA, LizAI Vietnam is a premier AI powerhouse founded by world-class leaders and Ph.D. experts in artificial intelligence and security from Harvard University, USA. We deliver cutting-edge AI innovations and scalable solutions across over 63 industries-some highlights are healthcare, finance, and legal-serving a diverse global market from individual users to large-scale enterprises.

Our products

• Our products are an end-to-end innovative platform and help build multi-agentic AI apps, instantly. This is the most comprehensive platform with the most affordable fees in the global market, compared to n8n, Dify, and others. As we scale our platform, we want to enable domain-specific "agent builders" and "flow templates" that integrate data, APIs, ML models, automated decision logic, and user interfaces.
• Our expertise is a data operating platform for Healthcare Asset Management and Precision Health, which addresses critical problems of >$150B annual productivity loss and poor AI-readiness in healthcare due to fragmented clinical data. Learn more about us and request demo of other AI for healthcare products:

Your Role & Responsibilities

• Contribute to the design, development, and testing of software applications, collaborating with colleague engineers to align on architectural goals while independently driving implementation.
• Apply and uphold software development best practices, ensuring clean code, rigorous automated testing, and comprehensive documentation across features.
• Own and deliver core engineering tasks independently, managing timelines effectively to ship high-quality code.
• Diagnose, debug, and troubleshoot complex system issues, identifying root causes and deploying reliable fixes to maintain production stability.
• Conduct and participate in constructive code reviews, providing actionable feedback to peers while ensuring optimal code quality and team-wide technical growth.
• Enforce and comply with LizAI's data protection and storage policies to maintain strict security and compliance standards.
• Communicate progress and blocker status transparently, providing clear technical updates and proactive risk management to team leads and stakeholders.

Your skills & qualifications

• Apply strong object-oriented programming (OOP) principles, software design patterns, and industry-standard best practices to build scalable architectures.
• Deliver robust backend services using Python (FastAPI) and C# (.NET Core / ASP.NET Core), routinely prioritizing and implementing Python-based solutions to optimize performance.
• Develop and integrate frontend components using modern frameworks like Angular or React to support full-stack initiatives.
• Design and optimize RESTful APIs, relational databases (SQL), and non-relational data structures (NoSQL) using sound data modeling techniques.
• Execute deliverables across the full Software Development Life Cycle (SDLC), actively contributing to and driving Agile/Scrum team ceremonies.
• Implement and manage cloud-native technologies, utilizing AWS, Docker, and Kubernetes for containerization and deployment pipelines.
• Integrate AI-assisted development tools (e.g., Cursor, GitHub Copilot, Claude Code) into the workflow to accelerate productivity, refactoring, and test coverage-while maintaining strict code ownership and engineering oversight.
• Demonstrate advanced analytical thinking, structured problem-solving, and precise attention to detail under minimal supervision.
• Collaborate and communicate effectively across cross-functional teams to align technical implementations with business objectives.

Minimum qualifications:

• Bachelor's degree or equivalent practical experience.
• Minimum 2 years of backend development experience using Python (e.g., FastAPI) and/or C# (.NET Core / ASP.NET Core).
• Proven experience designing and building RESTful APIs and backend services.
• Experience working with at least one ORM:
• Python: SQLAlchemy (or equivalent)
• .NET: Entity Framework
• Solid experience with both SQL and NoSQL databases.
• Strong understanding of OOP, clean code practices, and maintainable software design.
• Familiar with Git-based development workflows and Agile/Scrum practices.
• Experience using AI-powered development tools effectively to accelerate development tasks such as implementation, debugging, code review, testing, and documentation generation while ensuring correctness and security.
• Good English communication skills.

Preferred qualifications

• Deep understanding of design patterns, microservices architecture, OOP, functional programming, asynchronous programming, and event-driven systems.
• Strong experience developing scalable backend systems using Python and frameworks such as FastAPI; experience with C# / ASP.NET Core is highly valued.
• Experience with containerization and orchestration technologies such as Docker and Kubernetes.
• Experience working with large datasets and complex data structures.
• Experience building workflow automation, agent-based systems, AI-enabled applications, and integrations through APIs and event-driven pipelines using Python.
• Leverage AI-enabled development practices and AI-assisted engineering tools (e.g., Cursor, GitHub Copilot, Claude Code) to accelerate implementation, automated testing, debugging, and code reviews, while enforcing strict standards for system correctness, security, and maintainability.
• Exceptional problem-solving skills and the ability to work independently with minimal supervision.
• Ability to collaborate effectively with diverse global teams across multiple locations and time zones.
• Demonstrated leadership, ownership, and teamwork capabilities.
• Excellent verbal and written communication skills, with the ability to manage multiple priorities, meet deadlines, and adapt to changing requirements.
• Strong organizational skills, high attention to detail, and the ability to thrive in a collaborative, cross-functional environment.

Why You'll Love Working Here

At LizAI, we believe in nurturing talent and providing a learning environment where you can grow rapidly as an engineer.

• Training and mentorship from experienced engineers and leaders from Harvard University, global corporations, and leading institutions.
• Access to technical and soft-skill training programs.
• Opportunities to work on real projects that make an impact.
• Competitive compensation based on your learning progress and performance.
• Transparent review and promotion process - your growth depends on your capability and dedication.
• Possible opportunities for domestic and international training based on performance.

Compensation:

Monthly (base) salary: Up to $800 - $2000, depending on experience and performance.
Additional benefits: bonus, 13th month salary, social insurance, performance-based incentives, team-building events/travels, and continuous learning support.