Toptal

Senior Integration Engineer for Enterprise API & Integration Products

Remote, United States remote Entry Salary not listed
remote Design & Creative Curated
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About the role

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Summary
We are looking for a Senior Integration Engineer to build and operate integration products connecting Salesforce, SAP, and a carrier data lake. This role combines hands-on integration development with end-to-end production ownership, including API design, data mapping, testing, monitoring, troubleshooting, and recovery.
General information
This role focuses on building reliable, maintainable integrations rather than creating new point-to-point integration debt. You will work across Salesforce, SAP, and carrier data lake environments, taking ownership of integrations throughout their lifecycle—from implementation and testing through production support and continuous improvement.
Strong experience with MuleSoft or a comparable enterprise integration/API platform is expected, along with practical experience integrating with SAP and working with data lake ingestion patterns.
AI-assisted engineering is an explicit expectation for this engagement. You will use AI copilots and agents as part of your daily workflow to accelerate discovery, development, testing, documentation, and operational troubleshooting. You will remain responsible for validating and hardening AI-generated output and for all production decisions.
Tasks and Deliverables
Design and implement MuleSoft/API integrations across Salesforce, SAP, and the carrier data lake.
Define and maintain API contracts, field mappings, transformations, and automated tests.
Use Data Modeler to develop and maintain accurate data mappings between systems.
Debug and resolve production integration failures independently, including root-cause analysis and preventative improvements.
Instrument integration pipelines with appropriate monitoring, logging, and alerting.
Support Marketing Portfolio transition integrations while avoiding unnecessary point-to-point dependencies and new integration debt.
Use AI tools to accelerate mapping drafts, API stubs, test generation, documentation, and error-handling boilerplate.
Review and harden AI-generated output to ensure it meets production standards for reliability, maintainability, and quality.
Automate replay, retry, alerting, and recovery runbooks to reduce mean time to recovery (MTTR).
Continuously improve the reliability, observability, and operational efficiency of the integrations you own.
Required experience
5+ years of integration engineering experience.
Hands-on experience with MuleSoft or an equivalent enterprise ESB/API integration platform.
Experience integrating with SAP, including IDoc, API, and/or BAPI patterns.
Experience with Salesforce integrations and enterprise API patterns.
Experience with data lake ingestion and integration patterns.
Strong understanding of API contracts, data mapping, transformations, testing, and integration architecture.
Demonstrated experience supporting integrations in production, including monitoring, troubleshooting, alerting, retry/replay, and incident resolution.
Ability to take ownership of production issues and drive them through diagnosis, recovery, and prevention, rather than simply handing them off to another team.
Experience using AI copilots or agents to accelerate software engineering workflows.
Strong engineering judgment and the ability to validate, test, and improve AI-generated code and artifacts before they reach production.

To apply: https://weworkremotely.com/remote-jobs/toptal-senior-integration-engineer-for-enterprise-api-integration-products

Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Role
Design & Creative API integration CRM Remote Collaboration Writing remote

Likely questions

  1. Tell us about work you have done that is close to the Senior Integration Engineer for Enterprise API & Integration Products role.
  2. How would you approach your first 30 days at Toptal?
  3. Which of API integration, CRM and Remote Collaboration have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you stay organised and communicate clearly when working remotely?

Prepare before the call

  • A recent example that proves your experience with API integration, CRM and Remote Collaboration.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior Integration Engineer for Enterprise API & Integration Products role because I can bring practical experience in API integration, CRM and Remote Collaboration, learn the team quickly, and contribute to the outcomes Toptal needs from this hire.

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