United Therapeutics Software Engineer interview questions & guide 2026

The interview questions at United Therapeutics are designed to evaluate both your technical proficiency and your ability to collaborate in a highly multidisciplinary environment. The following questions are compiled from real interview experiences and represent the patterns you should prepare for.

Project Walkthroughs & Technical Presentation

Because much of your work will involve translating complex requirements into software solutions, interviewers place a heavy emphasis on your past work and your ability to explain your technical decisions.

• Walk me through a complex software project you designed and implemented from scratch. What were the architectural challenges?
• Describe a time when you had to integrate a new technology (such as an AI model or a cloud service) into an existing legacy system.

To succeed in the United Therapeutics interview process, you must prepare to showcase a blend of deep technical capabilities, strong communication skills, and a genuine interest in the company’s biotechnology mission.

Cross-Disciplinary Communication – You will be interviewing with, and eventually working alongside, professionals outside of computer science, including chemical engineers, biologists, and production directors. You must be able to explain complex technical concepts clearly without relying on excessive software jargon. Practice describing your past technical achievements in a way that highlights business and operational value.

System Architecture & Best Practices – Be ready to demonstrate your knowledge of enterprise-grade software design. Brush up on UML diagramming, software requirements documentation, and cloud architecture (specifically Microsoft Azure). The team values engineers who do not just write code but who can also design sustainable, scalable systems that adhere to strict regulatory and compliance standards.

The Microsoft & AI Stack – If you are interviewing for modern software roles within the organization, ensure you are comfortable discussing C#, .NET, Blazor, SQL, and cloud-native development. Additionally, having a solid understanding of how to integrate and manage modern AI APIs, vector search, and LLMs will give you a significant competitive advantage.

The interview process at United Therapeutics typically spans three to four weeks. It is structured to evaluate your technical competence, your ability to present your work, and your cultural fit with both the engineering and scientific teams.

The process generally begins with a standard HR screening call, which focuses on your background, daily tasks in your current role, and your interest in the company. This is followed by a technical screening or a call with the hiring manager, which may involve a structured walkthrough of your resume. In some specialized or research-focused roles, you will be asked to deliver a 30-to-60-minute presentation of your past work or research to a panel of future supervisors and team members, followed by a Q&A session.

The final stage is typically a comprehensive panel interview, which can be conducted via Microsoft Teams or in person at one of their primary facilities (such as Silver Spring, MD, or Durham, NC). If you interview in person, the day often includes a tour of their state-of-the-art facilities, giving you a firsthand look at their manufacturing and R&D operations. The panel interviews are highly cross-functional, meaning you will meet with a mix of software engineers, department heads, and scientific team leaders.

The timeline above outlines the typical progression from your initial application to the final offer. Candidates should note that because the panel stage involves coordinating with busy scientific and clinical directors, scheduling can sometimes take a week or two between rounds. Use the presentation and onsite stages to demonstrate not just your coding skills, but how your software solutions can solve real-world operational and scientific challenges.

Past Work Presentation & Technical Walkthrough

For many engineering positions, United Therapeutics utilizes a presentation-based evaluation. This stage is designed to assess your technical depth, communication clarity, and how you handle live technical scrutiny.

Be ready to go over:

• Project Context – Clearly defining the business or scientific problem you were trying to solve, the scale of the project, and the constraints you faced.
• Architectural Decisions – Explaining why you chose specific technologies, frameworks, or cloud services, and what trade-offs you made.
• Individual Contribution – Being explicit about what you personally designed, wrote, and delivered, rather than just speaking generally about your team's work.
• Advanced concepts (less common) – Integrating specialized data pipelines (like Databricks), deploying custom machine learning models, or optimizing high-performance computing workloads.

Example scenarios:

• "Present a 30-minute slide deck detailing a complex software system you architected, focusing on data flow, security, and scalability."
• "Walk the panel through a UML diagram or system architecture document you created, explaining how you handled potential points of failure."

Cross-Functional Collaboration & Domain Integration

Because software engineers at United Therapeutics build tools for scientists, clinical researchers, and production managers, you must prove that you can operate effectively in a highly interdisciplinary environment.

Be ready to go over:

• Requirement Gathering – Translating vague or non-technical requests from scientific teams into concrete software requirements.
• Regulatory & Compliance Awareness – Understanding how software must be developed, tested, and documented within a regulated biotech or medical environment.
• Empathy and Usability – Designing front-end interfaces (such as Blazor-based dashboards) that are accessible and intuitive for users who are not software engineers.

Example scenarios:

• "Describe a time you had to build a tool for a user group that did not understand software development. How did you ensure the final product met their needs?"
• "How do you handle a situation where a scientific stakeholder requests a feature that conflicts with software engineering best practices or system security?"

System Architecture & Modern Web/AI Stack

This technical evaluation focuses on your ability to build enterprise-grade, secure, and scalable applications, with a strong emphasis on the Microsoft Azure ecosystem and modern AI integrations.

Be ready to go over:

• Cloud Infrastructure – Designing hosting, storage, and security configurations in Microsoft Azure.
• API Design – Creating clean, performant, and secure RESTful APIs to connect front-end interfaces with backend services and AI models.
• AI & LLM Integration – Implementing custom AI applications utilizing modern GPT models, managing model context, and optimizing API costs.
• Advanced concepts (less common) – Implementing Model Context Protocol (MCP), designing complex star schemas for relational databases, or building custom CI/CD pipelines for automated compliance checks.

Example scenarios:

• "How would you design a system that securely processes and indexes large volumes of scientific documents for a custom retrieval-augmented generation (RAG) AI application?"
• "Explain how you would architect a web application to ensure high availability and low latency for users spread across multiple geographic manufacturing sites."

As a Software Engineer at United Therapeutics, your day-to-day work will bridge the gap between software development, cloud architecture, and biotechnology.

You will be responsible for designing, developing, and maintaining scalable, enterprise-grade web and AI-enabled applications. This includes writing clean, testable code in modern frameworks (such as .NET, C# Blazor, and Python) and managing system integrations across multiple services, agents, and models. You will establish reusable design patterns and shared services to ensure technical consistency and maintainability across all internal platforms.

Collaboration is a core part of the role. You will work closely with product owners, business stakeholders, and cross-functional scientific teams to translate complex business and research requirements into reliable technical solutions. Additionally, you will build and maintain robust CI/CD pipelines in Microsoft Azure to automate testing, security checks, and deployments across development, staging, and production environments.

In addition to core development, you will build proof-of-concept prototypes to evaluate emerging technologies, optimize application performance and search efficiency, and ensure all systems adhere to strict security, compliance, and governance requirements appropriate for a regulated healthcare environment.

To be competitive for a Software Engineer position at United Therapeutics, candidates must possess a strong foundation in computer science and demonstrated experience in modern enterprise software development.

• Must-Have Technical Skills:

  • Strong proficiency in object-oriented development, preferably using C#/.NET or Python.
  • Experience building web applications using modern web stack technologies (such as Blazor, MVC, HTML/CSS, or Node.js).
  • Hands-on experience developing, deploying, and monitoring cloud-native applications, preferably in Microsoft Azure.
  • Experience designing and querying relational databases (SQL) and working with web APIs.
  • Familiarity with agile software development methodologies (such as Scrum or Kanban).

• Nice-to-Have Skills:

  • Experience with data pipeline and engineering technologies like Databricks.
  • Experience developing custom AI applications utilizing modern GPT large language models (LLMs).
  • Strong technical writing skills, including the ability to produce UML diagrams and IEEE-standard software engineering documents.
  • Background or interest in biotechnology, pharmaceuticals, or medical devices.

• Experience Levels:

  • For standard engineering roles: A Bachelor’s degree in Computer Science or a related field with 3+ years of professional software engineering experience.
  • For senior-level roles: 5+ years of experience with a Bachelor's degree, or 3+ years of experience with a Master's degree, including demonstrated technical leadership or system architecture ownership.

Q: How technical is the interview process for Software Engineers? **A: ** The technical rigor at United Therapeutics focuses heavily on system architecture, past project execution, and domain-specific knowledge rather than rapid-fire algorithmic coding puzzles. Expect to dive deep into how you build, test, and deploy real-world systems, and be ready to present your past work in detail.

Q: What is the company culture like for engineering teams? **A: ** The culture is highly collaborative, mission-driven, and supportive. Because the company operates as a public benefit corporation, there is a shared passion for helping patients and solving incredibly difficult medical challenges. It is a highly professional environment that values continuous learning, creativity, and cross-functional respect.

Q: Does United Therapeutics offer remote or hybrid work options? **A: ** Many software engineering roles operate on a hybrid model, requiring some days in the office to collaborate with local teams and scientific stakeholders. Primary engineering locations include Silver Spring, MD, Durham/RTP, NC, and Seattle, WA. Specific remote flexibility depends on the team and the nature of the projects.

Q: What is the typical timeline from the first interview to an offer? **A: ** The entire process usually takes about three to four weeks. However, because final rounds often involve panel interviews with upper management and scientific directors, scheduling can occasionally take longer. Candidates are encouraged to maintain active communication with their recruiter.

• Understand the Mission: Spend time researching United Therapeutics’ pipeline, including their work in pulmonary arterial hypertension (PAH) and their organ manufacturing initiatives. Showing that you understand and care about their public benefit mission will set you apart from other candidates.
• Prepare for Non-Technical Panelists: Your panel interviewers will likely include leaders from process engineering, chemical R&D, or production. Frame your technical achievements in terms of how they improve operational efficiency, data reliability, or scientific progress, rather than just code quality.
• Document Your Work: Be ready to show how you approach the software development lifecycle. If you have examples of UML diagrams, technical specifications, or architectural documentation you have written, be prepared to discuss them.

• Follow Up Proactively: Because the company handles complex scientific operations, hiring managers can sometimes be pulled into urgent clinical or production matters. Send a polite thank-you email within 24 hours of your interview, and do not hesitate to follow up weekly if you are waiting on feedback.

Positioning yourself for a Software Engineer role at United Therapeutics requires demonstrating a unique combination of enterprise software expertise, architectural discipline, and a passion for biotechnology. By focusing your preparation on system design, cross-functional communication, and the Microsoft/Azure stack, you can show the hiring team that you are ready to build the software that drives their life-saving mission.

Take the time to refine your past project presentations, practice explaining your architectural choices, and align your stories with the collaborative, public-benefit ethos of the company. For more detailed insights, community interview reviews, and salary benchmarks, you can explore additional resources on Dataford to help you feel fully prepared.

The compensation data reflects United Therapeutics' commitment to attracting top-tier engineering talent to support its critical biotech initiatives. Base salaries are highly competitive, and as a public benefit corporation, the company also offers a comprehensive benefits package designed to support long-term employee wellness and financial security. Use this compensation range to guide your expectations during the final stages of the hiring process.