Hello, our name is Customertimes, but you can call us CT. We are a global digital engineering, product development, and technology consulting company. Headquartered in New York, we have a team of 1000+ experts working across 65+ countries.

About this job:

We are seeking a Senior Full Stack Engineer (.NET / React) to join a US-based healthcare client in the oncology domain. You will contribute to the maintenance, modernization, and continuous evolution of an Electronic Health Record (EHR) platform used in cancer treatment practices. The system manages sensitive patient and clinical data, including medical history, lab results, treatment plans, allergies, and appointment scheduling, requiring strong attention to performance, scalability, and data integrity.

This is a full-stack role with an expected split of approximately 60% backend (.NET) and 40% frontend (React), depending on project needs. You will work across both legacy and modern components, delivering new features while supporting system improvements, and collaborating closely with cross-functional teams in an agile environment to ensure a reliable and secure healthcare solution.

Location:

• Brazil;
• Colombia;
• Argentina;
• Peru;
• Uruguay;
• Costa Rica;
• Mexico.

How you'll make an impact:

• Develop and maintain features in a .NET (C#)-based application;
• Work with legacy ASPX Web Forms and participate in their gradual migration to React;
• Handle tickets independently based on Jira tasks;
• Write, debug, and optimize SQL queries;
• Occasionally make small updates or bug fixes in Python (rare);
• Use the AWS Console to troubleshoot errors, review logs, and verify service statuses;
• Collaborate with a generalist team on end-to-end solutions spanning frontend and backend;
• Participate in a rotating on-call schedule (approx. every 5 weeks, mostly during U.S. business hours);
• Optional: assist with maintenance tasks for a React Native iOS app (small, infrequent updates).

What makes you a great fit:

• Strong experience in .NET (C#) development;
• Familiarity with ASPX Web Forms or willingness to learn quickly;
• Professional experience with React.js in a production environment;
• Solid working knowledge of SQL and relational databases;
• Experience using Git for version control.

You are a star if you have:

• Experience with Python for basic scripting and small updates;
• Ability to navigate the AWS Console for basic debugging and log review;
• Familiarity with React Native and Apple App Store deployments;
• Exposure to monitoring tools like Splunk or Datadog;
• Openness to working with and improving legacy codebases;
• Willingness to gradually contribute to modernization initiatives.

What we offer you as a CTzen:

We call ourselves CTzens — a combination of the company's name and the word "citizen." This concept reflects who we are as coworkers and as people. Join our team and enjoy the perks that come with it:

• Be rewarded for your impact with a competitive salary;
• Enjoy the freedom to work remotely — 100% remote opportunity;
• Take time to recharge with paid time off (PTO), including sick leave and national holidays;
• Travel expenses are covered when applicable;
• Referral program;
• Paid certification program;
• Learn, explore, and expand your expertise with access to the language platform and a personal development plan;
• Stay connected through online team events, celebrations, and charity initiatives;
• Get recognized for your impact — earn CT points and exchange them for awesome merch;
• Benefits may vary depending on your location — we'll make sure you have all the details as you move through the application process.

If you're looking to contribute to global projects, grow your skills, shape the way you work, and be part of a connected international community — Customertimes is the place to build your next career chapter. Are you ready to spark the tech with us?

Job ID: JR-186652