Senior Developer Applications - API

Position Summary

The Senior Developer, Applications - API is responsible for designing and building business applications and support functions based upon identified business requirements and best practice. The role leads to the implementation of strategic business objectives with an emphasis on application architecture and applies advanced analysis skills and experience in principles of architecting, designing, demonstrating, and positioning. This position will help plan, coordinate, architect, and develop all activities related to the integration of software programs, applications, and third-party solutions as required to meet the business requirements of the organization.

Essential Functions

• Design and implement end-to-end API integrations, including authentication, error handling, rate limiting, and retries.
• Build and maintain scalable, secure, and well-documented RESTful and GraphQL APIs for internal and external consumption.
• Evaluate and integrate with third-party APIs from partners, vendors, and platforms (e.g., Stripe, Salesforce, Shopify, AWS, Twilio).
• Adhere to secure coding practices and ensure all integrations adhere to security and compliance standards (e.g., OWASP Top 10, data encryption, access control).
• Conduct regular code audits and security reviews of API implementations, both internal and third-party.
• Design authentication and authorization flows using best practices such as OAuth 2.0, API tokens, and JWT with expiration / refresh strategies.
• Develop reusable integration patterns and middleware services to streamline future API work.
• Ensure integration reliability with automated testing, monitoring, logging, and alerting.
• Collaborate with DevOps teams to manage API gateway configurations, reverse proxies, and load balancing (e.g., AWS API Gateway, NGINX, Kong).
• Secure API endpoints using industry-standard practices (e.g., OAuth2, OpenID Connect, HMAC, API key management).
• Optimize API performance and scalability using caching (e.g., Redis, CDN), pagination, and asynchronous processing where appropriate.
• Work with large datasets in transit and build resilient data synchronization mechanisms.
• Maintain backward compatibility and version control for public-facing APIs.
• Perform code reviews and enforce best practices around integration architecture and error handling.
• Create and maintain comprehensive documentation on all integrations, development, and changes.
• Participate in incident response and postmortems related to API outages or third-party failures.
• Create, edit and adhere to Standard Operating Procedures (SOPs), process improvements, and standardization of templates.
• Perform ad-hoc and cross-functional projects assigned to support business needs and provide developmental opportunities.

Education & Experience

Knowledge, Skills, & Abilities

Working Environment / Physical Environment

This position is eligible for a discretionary bonus and equity award. The annual base pay range for this position is below. The specific rate will depend on the successful candidate’s qualifications, prior experience as well as geographic location.

$153,000 (entry-level qualifications) to $170,000 (highly experienced) annually

The application window is anticipated to close on 60 days from when it is posted or sooner if the position is filled or closed.

ImmunityBio employees are as valuable as the people we serve. We have built a resource of robust benefit offerings to best support the total wellbeing of our team members and their families. Our competitive total rewards benefits package, for eligible employees, include : Medical, Dental and Vision Plan Options