Onco360 Software Engineer Interview Questions + Guide in 2025

Onco360 is a pioneering oncology pharmacy committed to enhancing the lives of patients battling cancer and rare diseases through innovative pharmaceutical solutions.

As a Software Engineer at Onco360, you will play a critical role in the analysis, design, development, implementation, quality assurance, and maintenance of APIs and web-based applications. Your responsibilities will include creating robust, scalable, and secure RESTful APIs and microservices while leveraging tools like Postman and Swagger. You will work extensively with C#/VB.Net, Visual Studio .Net, SQL Server, and modern development practices, ensuring high code quality and adherence to development standards. An understanding of API security best practices and experience with cloud services such as AWS or Azure will be beneficial. The ideal candidate will exemplify Onco360's core values of compassion, teamwork, respect, integrity, and passion, reflecting a commitment to improving patient care.

This guide is designed to equip you with the necessary insights and knowledge to excel in your interview, giving you the confidence to showcase your skills and alignment with Onco360's mission.

The interview process for a Software Engineer at Onco360 is structured to assess both technical skills and cultural fit within the organization. Here’s what you can expect:

1. Initial Screening

The first step in the interview process is an initial screening, typically conducted via a phone call with a recruiter. This conversation lasts about 30 minutes and focuses on your background, experience, and motivation for applying to Onco360. The recruiter will also provide insights into the company culture and the specifics of the Software Engineer role, ensuring that you understand the expectations and values of the organization.

2. Technical Assessment

Following the initial screening, candidates will undergo a technical assessment. This may take place over a video call and will involve a series of coding challenges or problem-solving exercises. You will be expected to demonstrate your proficiency in relevant programming languages, particularly C#/VB.Net, and showcase your understanding of API development, database management, and software design principles. Be prepared to discuss your previous projects and the technologies you used.

3. Behavioral Interview

After successfully completing the technical assessment, candidates will participate in a behavioral interview. This round typically involves one or more interviewers from the engineering team and focuses on your past experiences, teamwork, and how you align with Onco360's mission and values. Expect questions that explore your problem-solving abilities, communication skills, and how you handle challenges in a collaborative environment.

4. Final Interview

The final interview is often a more in-depth discussion with senior management or team leads. This round may include both technical and behavioral components, allowing you to further demonstrate your expertise and fit for the team. You may also be asked to present a past project or discuss a technical problem you solved, showcasing your thought process and technical acumen.

5. Offer and Negotiation

If you successfully navigate the previous rounds, you will receive an offer. This stage may involve discussions about salary, benefits, and other employment terms. Onco360 values transparency and aims to ensure that candidates feel comfortable with their offer.

As you prepare for these interviews, it’s essential to familiarize yourself with the types of questions that may be asked, particularly those that relate to your technical skills and experiences.

Here are some tips to help you excel in your interview.

Emphasize Your Passion for Healthcare

Onco360 is deeply committed to improving the lives of patients battling cancer and rare diseases. During your interview, express your passion for healthcare and how your technical skills can contribute to this mission. Share any personal experiences or motivations that drive your interest in working for a company that prioritizes compassion and patient care.

Showcase Your Technical Proficiency

Be prepared to discuss your hands-on experience with the technologies mentioned in the job description, such as C#/VB.Net, SQL Server, and API management tools. Highlight specific projects where you designed, developed, or maintained APIs or applications. Demonstrating your technical expertise with real-world examples will help you stand out.

Understand the Importance of Teamwork

Onco360 values teamwork, respect, and integrity. Be ready to discuss how you have successfully collaborated with others in past projects. Share examples of how you contributed to a team’s success, resolved conflicts, or supported colleagues in achieving common goals. This will show that you align with the company’s culture and values.

Prepare for Behavioral Questions

Expect behavioral interview questions that assess your problem-solving abilities and how you handle challenges. Use the STAR (Situation, Task, Action, Result) method to structure your responses. For instance, describe a time when you faced a technical challenge, the steps you took to resolve it, and the positive outcome that resulted.

Familiarize Yourself with API Security Best Practices

Given the focus on API technologies, be knowledgeable about API security best practices, including authentication and authorization methods like OAuth and JWT. Discussing your understanding of these concepts will demonstrate your readiness to contribute to the security and integrity of Onco360’s systems.

Highlight Your Adaptability

Onco360 offers options for hybrid and remote work, indicating a flexible work environment. Share examples of how you have adapted to changing work conditions or learned new technologies quickly. This will illustrate your ability to thrive in a dynamic setting and your willingness to embrace new challenges.

Ask Insightful Questions

Prepare thoughtful questions to ask your interviewers about the team dynamics, ongoing projects, and the company’s future direction. This not only shows your genuine interest in the role but also helps you assess if Onco360 is the right fit for you. Consider asking about how the company measures success in its software engineering team or what opportunities exist for professional growth.

Follow Up with Gratitude

After the interview, send a thank-you email expressing your appreciation for the opportunity to interview. Reiterate your enthusiasm for the role and how you can contribute to Onco360’s mission. This small gesture can leave a lasting impression and reinforce your interest in the position.

By following these tips, you can present yourself as a strong candidate who not only possesses the necessary technical skills but also aligns with Onco360’s mission and values. Good luck!

Onco360 Software Engineer Interview Questions

In this section, we’ll review the various interview questions that might be asked during an Onco360 software engineer interview. The questions will focus on your technical skills, problem-solving abilities, and understanding of software development principles, particularly in the context of API technologies and database management.

Technical Skills

1. Can you explain the process of designing a RESTful API?

Understanding the principles of RESTful API design is crucial for this role, as you will be responsible for creating scalable and secure APIs.

How to Answer

Discuss the key components of RESTful API design, including resource identification, statelessness, and the use of standard HTTP methods. Highlight your experience with tools like Swagger or Postman.

Example

“When designing a RESTful API, I start by identifying the resources and their relationships. I ensure that the API is stateless, meaning each request from the client contains all the information needed to process it. I also utilize tools like Swagger for documentation and Postman for testing, ensuring that the API adheres to best practices for security and performance.”

2. What are some best practices for API security?

Given the sensitive nature of healthcare data, API security is paramount.

How to Answer

Mention authentication methods like OAuth and JWT, as well as encryption techniques. Discuss how you have implemented these practices in past projects.

Example

“I prioritize API security by implementing OAuth for user authentication and JWT for secure token exchange. Additionally, I ensure that all data transmitted is encrypted using HTTPS, and I regularly conduct security audits to identify and mitigate vulnerabilities.”

3. Describe your experience with C#/VB.Net and how you have used it in your projects.

This question assesses your familiarity with the primary programming languages used at Onco360.

How to Answer

Provide specific examples of projects where you utilized C#/VB.Net, focusing on the challenges you faced and how you overcame them.

Example

“In my previous role, I developed a web application using C# and ASP.NET that streamlined patient data management. I faced challenges with data retrieval speed, which I addressed by optimizing SQL queries and implementing caching strategies, resulting in a 30% performance improvement.”

4. How do you approach debugging and resolving technical issues in your applications?

Problem-solving skills are essential for a software engineer, especially in a healthcare setting.

How to Answer

Discuss your systematic approach to debugging, including tools and techniques you use to identify and fix issues.

Example

“I approach debugging by first replicating the issue to understand its context. I then use tools like Visual Studio’s debugger to step through the code and identify the root cause. Once identified, I implement a fix and conduct thorough testing to ensure the issue is resolved without introducing new bugs.”

5. Can you explain the concept of microservices architecture?

Microservices are increasingly important in modern software development, especially for scalable applications.

How to Answer

Define microservices and discuss their advantages, particularly in relation to API development and deployment.

Example

“Microservices architecture involves breaking down an application into smaller, independent services that communicate over APIs. This approach allows for greater scalability and flexibility, as each service can be developed, deployed, and scaled independently. In my last project, we transitioned to a microservices architecture, which improved our deployment times and reduced downtime during updates.”

Database Management

1. What experience do you have with SQL Server and database optimization?

Database management is a key responsibility for this role, and optimization is critical for performance.

How to Answer

Share your experience with SQL Server, focusing on specific optimization techniques you have employed.

Example

“I have extensive experience with SQL Server, where I regularly optimize database performance by indexing frequently queried columns and analyzing execution plans. In one project, I reduced query response times by 40% by implementing proper indexing strategies and partitioning large tables.”

2. How do you design and implement ETL processes?

ETL (Extract, Transform, Load) processes are vital for data management in healthcare applications.

How to Answer

Discuss your experience with ETL tools and the steps you take to ensure data integrity and performance.

Example

“I design ETL processes by first identifying the data sources and the transformations required. I use tools like SSIS for implementation, ensuring that data is validated at each stage to maintain integrity. In a recent project, I automated the ETL process, which reduced manual errors and improved data availability for reporting.”

3. Can you explain the differences between relational and NoSQL databases?

Understanding the strengths and weaknesses of different database types is important for application design.

How to Answer

Discuss the characteristics of both types of databases and when to use each.

Example

“Relational databases, like SQL Server, are structured and use SQL for querying, making them ideal for applications requiring complex queries and transactions. In contrast, NoSQL databases, such as MongoDB, are more flexible and can handle unstructured data, making them suitable for applications with varying data types. I choose the database type based on the specific needs of the application.”

4. Describe a challenging database problem you encountered and how you resolved it.

This question assesses your problem-solving skills in a database context.

How to Answer

Provide a specific example of a database issue you faced, the steps you took to resolve it, and the outcome.

Example

“I once encountered a performance issue with a database that was causing slow response times. After analyzing the queries, I discovered that certain indexes were missing. I added the necessary indexes and optimized the queries, which improved performance by over 50%.”

5. How do you ensure data quality and integrity in your applications?

Data quality is critical in healthcare applications, and interviewers will want to know your approach.

How to Answer

Discuss the methods you use to validate and maintain data quality throughout the application lifecycle.

Example

“I ensure data quality by implementing validation rules at both the application and database levels. I also conduct regular audits and use automated testing to catch any discrepancies early. In my previous role, I established a data governance framework that significantly improved data accuracy and reliability.”