Know ATS Score
CV/Résumé Score
  • Expertini Resume Scoring: Our Semantic Matching Algorithm evaluates your CV/Résumé before you apply for this job role: Senior Developer Applications API.
United States Jobs Expertini

Urgent! Senior Developer Applications - API Job Opening In San Diego – Now Hiring ImmunityBio

Senior Developer Applications API



Job description

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

  • Bachelor’s degree in computer science, Engineering, or a related field with 5+ years of backend development experience with a strong focus on API architecture and integration required.
  • Experience with API schema management tools like Swagger/OpenAPI, Postman, or Stoplight required.
  • Experience with API Gateway platforms (e.g., AWS API Gateway, Kong, Apigee, NGINX) required.
  • Experience with transport layer security (TLS), HTTPS, certificate pinning, and secure transmission of sensitive data required.
  • Experience using static and dynamic analysis tools for security testing (e.g., Snyk, SonarQube, Burp Suite, OWASP ZAP) preferred.
  • Knowledge, Skills, & Abilities

  • Proficiency in at least one backend language or framework: Node.js, Python (Django/Flask/FastAPI), Java (Spring Boot), or C# (.NET Core).
  • Deep understanding of REST, GraphQL, Webhooks, WebSockets, and gRPC.
  • Knowledge of HTTP/HTTPS protocols, status codes, CORS, content negotiation, and idempotency.
  • Proficiency working with OAuth 2.0, JWT, API keys, and secure token exchange mechanisms.
  • Familiarity with message brokers and event-driven architectures (e.g., Kafka, RabbitMQ, SNS/SQS).
  • Strong Git/GitHub (or GitLab/Bitbucket) workflow experience, including branching strategies and CI/CD.
  • Familiarity with serverless integration models using AWS Lambda, Azure Functions, or GCP Cloud Functions.
  • Proficiency with data transformation tools (e.g., JSONPath, JQ, XML/XSLT).
  • Understanding of OWASP API Security Top 10, with experience mitigating common vulnerabilities like injection, insecure object references, and excessive data exposure.
  • Familiarity with IAM (Identity and Access Management) principles and tools (e.g., RBAC, ABAC, AWS IAM).
  • Knowledge of API rate limiting, throttling, IP whitelisting, and other protective measures to prevent abuse.
  • Understanding of middleware platforms (e.g., MuleSoft, Workato, Dell Boomi) or iPaaS tools.
  • Exposure to monitoring and tracing tools like Datadog, New Relic, Prometheus, Grafana, or OpenTelemetry.
  • Working knowledge of Docker and basic container orchestration with Kubernetes or ECS/EKS.
  • Working Environment / Physical Environment

  • This position works in El Segundo, CA
  • Regular work schedule is Monday – Friday, within standard business hours.

    Flexibility is available with manager approval.
  • Must possess mobility to work in a standard office setting and to use standard office equipment, including a computer.
  • Lift and carry materials weighing up to 20 pounds.
  • 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 • Health and Financial Wellness Programs • Employer Assistance Program (EAP) • Company Paid and Voluntary Life/AD&D, Short-Term and Long-Term Disability • Healthcare and Dependent Care Flexible Spending Accounts • 401(k) Retirement Plan with Company Match • 529 Education Savings Program • Voluntary Legal Services, Identity Theft Protection, Pet Insurance and Employee Discounts, Rewards and Perks • Paid Time Off (PTO) includes: 11 Holidays • Exempt Employees are eligible for Unlimited PTO • Non-Exempt Employees are eligible for 10 Vacation Days, 56 Hours of Health Pay, 2 Personal Days and 1 Cultural Day • We are committed to providing you with the tools and resources you need to optimize your Health and Wellness.


    Required Skill Profession

    Computer Occupations



    Your Complete Job Search Toolkit

    ✨ Smart • Intelligent • Private • Secure

    Start Using Our Tools

    Join thousands of professionals who've advanced their careers with our platform

    Rate or Report This Job
    If you feel this job is inaccurate or spam kindly report to us using below form.
    Please Note: This is NOT a job application form.


      Unlock Your Senior Developer Potential: Insight & Career Growth Guide


    • Real-time Senior Developer Jobs Trends in San Diego, United States (Graphical Representation)

      Explore profound insights with Expertini's real-time, in-depth analysis, showcased through the graph below. This graph displays the job market trends for Senior Developer in San Diego, United States using a bar chart to represent the number of jobs available and a trend line to illustrate the trend over time. Specifically, the graph shows 200392 jobs in United States and 7801 jobs in San Diego. This comprehensive analysis highlights market share and opportunities for professionals in Senior Developer roles. These dynamic trends provide a better understanding of the job market landscape in these regions.

    • Are You Looking for Senior Developer Applications API Job?

      Great news! is currently hiring and seeking a Senior Developer Applications API to join their team. Feel free to download the job details.

      Wait no longer! Are you also interested in exploring similar jobs? Search now: .

    • The Work Culture

      An organization's rules and standards set how people should be treated in the office and how different situations should be handled. The work culture at ImmunityBio adheres to the cultural norms as outlined by Expertini.

      The fundamental ethical values are:
      • 1. Independence
      • 2. Loyalty
      • 3. Impartiality
      • 4. Integrity
      • 5. Accountability
      • 6. Respect for human rights
      • 7. Obeying United States laws and regulations
    • What Is the Average Salary Range for Senior Developer Applications API Positions?

      The average salary range for a varies, but the pay scale is rated "Standard" in San Diego. Salary levels may vary depending on your industry, experience, and skills. It's essential to research and negotiate effectively. We advise reading the full job specification before proceeding with the application to understand the salary package.

    • What Are the Key Qualifications for Senior Developer Applications API?

      Key qualifications for Senior Developer Applications API typically include Computer Occupations and a list of qualifications and expertise as mentioned in the job specification. Be sure to check the specific job listing for detailed requirements and qualifications.

    • How Can I Improve My Chances of Getting Hired for Senior Developer Applications API?

      To improve your chances of getting hired for Senior Developer Applications API, consider enhancing your skills. Check your CV/Résumé Score with our free Tool. We have an in-built Resume Scoring tool that gives you the matching score for each job based on your CV/Résumé once it is uploaded. This can help you align your CV/Résumé according to the job requirements and enhance your skills if needed.

    • Interview Tips for Senior Developer Applications API Job Success
      ImmunityBio interview tips for Senior Developer Applications   API

      Here are some tips to help you prepare for and ace your job interview:

      Before the Interview:
      • Research: Learn about the ImmunityBio's mission, values, products, and the specific job requirements and get further information about
      • Other Openings
      • Practice: Prepare answers to common interview questions and rehearse using the STAR method (Situation, Task, Action, Result) to showcase your skills and experiences.
      • Dress Professionally: Choose attire appropriate for the company culture.
      • Prepare Questions: Show your interest by having thoughtful questions for the interviewer.
      • Plan Your Commute: Allow ample time to arrive on time and avoid feeling rushed.
      During the Interview:
      • Be Punctual: Arrive on time to demonstrate professionalism and respect.
      • Make a Great First Impression: Greet the interviewer with a handshake, smile, and eye contact.
      • Confidence and Enthusiasm: Project a positive attitude and show your genuine interest in the opportunity.
      • Answer Thoughtfully: Listen carefully, take a moment to formulate clear and concise responses. Highlight relevant skills and experiences using the STAR method.
      • Ask Prepared Questions: Demonstrate curiosity and engagement with the role and company.
      • Follow Up: Send a thank-you email to the interviewer within 24 hours.
      Additional Tips:
      • Be Yourself: Let your personality shine through while maintaining professionalism.
      • Be Honest: Don't exaggerate your skills or experience.
      • Be Positive: Focus on your strengths and accomplishments.
      • Body Language: Maintain good posture, avoid fidgeting, and make eye contact.
      • Turn Off Phone: Avoid distractions during the interview.
      Final Thought:

      To prepare for your Senior Developer Applications API interview at ImmunityBio, research the company, understand the job requirements, and practice common interview questions.

      Highlight your leadership skills, achievements, and strategic thinking abilities. Be prepared to discuss your experience with HR, including your approach to meeting targets as a team player. Additionally, review the ImmunityBio's products or services and be prepared to discuss how you can contribute to their success.

      By following these tips, you can increase your chances of making a positive impression and landing the job!

    • How to Set Up Job Alerts for Senior Developer Applications API Positions

      Setting up job alerts for Senior Developer Applications API is easy with United States Jobs Expertini. Simply visit our job alerts page here, enter your preferred job title and location, and choose how often you want to receive notifications. You'll get the latest job openings sent directly to your email for FREE!