Integration Engineer

App Zen is the leader in autonomous spend-to-pay software. Its patented artificial intelligence accurately and efficiently processes information from thousands of data sources so that organizations can better understand enterprise spend at scale to make smarter business decisions. It seamlessly integrates with existing accounts payable, expense, and card workflows to read, understand, and make real-time decisions based on your unique spend profile, leading to faster processing times and fewer instances of fraud or wasteful spend.

Global enterprises, including one-third of the Fortune 500, use App Zen’s invoice, expense, and card transaction solutions to replace manual finance processes and accelerate the speed and agility of their businesses. To learn more, visit us at

The Integration Engineer is responsible for building, implementing, and maintaining integrations between App Zen and our customers' enterprise systems. This is a hands‑on technical role focused on delivering robust, scalable integration solutions. You will work directly with customer technical teams, write code, configure iPaaS platforms, troubleshoot production issues, and ensure data flows seamlessly across systems. If you enjoy rolling up your sleeves, solving complex integration puzzles, and seeing your work directly impact customers, this role is for you.

• Build and deploy integrations connecting App Zen with customer ERP, procurement, and financial systems using iPaaS platforms like Workato, Mule Soft, Boomi, or Celigo
• Develop, test, and maintain RESTful APIs, SOAP web services, webhooks, and flat file‑based integrations (CSV, XML, JSON)
• Write and maintain integration scripts and custom connectors using Python, JavaScript, or Java
• Configure and manage secure file transfers using SFTP, AS2, and cloud storage solutions
• Implement and troubleshoot Single Sign‑On configurations (SAML, OAuth 2.0, OIDC)
• Monitor integration jobs, investigate failures, and resolve production issues with urgency
• Write SQL queries for data validation, transformation, and troubleshooting
• Build reusable Workato recipes, Mule Soft flows, or equivalent automation workflows
• Create and maintain technical documentation including integration specifications, data mappings, and runbooks
• Participate in customer calls to gather requirements, demo solutions, and provide technical support
• Collaborate with Product, Engineering, and Customer Success teams to improve integration capabilities
• Perform root cause analysis on integration failures and implement permanent fixes

• 5–8 years of hands‑on experience building and supporting enterprise integrations
• Strong proficiency with at least one iPaaS platform:
  Workato, Mule Soft Anypoint, Dell Boomi, Celigo, or Snap Logic
• Solid programming skills in Python, JavaScript, or Java—you write production‑quality code
• Hands‑on experience with RESTful API development and consumption, including authentication methods (API keys, OAuth, JWT)
• Working knowledge of SOAP web services and XML/XSLT transformations
• Experience with SFTP, secure file handling, and batch processing workflows
• Familiarity with Finance and Procurement processes (Procure to Pay, Accounts Payable, Expenses) is a strong plus
• Exposure to enterprise systems such as Workday, Net Suite, Coupa, Microsoft Dynamics, or similar
• Experience with cloud platforms (AWS, Azure, or GCP)—comfortable navigating S3, Lambda, API Gateway, or equivalent services
• Strong troubleshooting mindset—you dig into logs, trace data flows, and don’t stop until you find the root cause

• Proficient in writing and debugging integration code in Python, JavaScript, or Java; hands‑on experience building Workato recipes, Mule Soft flows, or Boomi processes
• Strong SQL skills for querying relational databases (Postgre
  
  SQL, MySQL, SQL Server)
• Familiarity with No
  
  SQL databases (Mongo
  
  DB, Dynamo
  
  DB) is a plus
• Experience with EDI standards (cXML, ANSI X12) for supplier integrations
• Comfortable with API testing tools like Postman, Insomnia, or cURL
• Understanding of CI/CD practices and version control (Git)
• Experience with logging and monitoring tools (Splunk, Datadog, Cloud Watch, or similar)
• Familiarity with message queues (Kafka, Rabbit
  
  MQ, SQS) and event‑driven patterns is a plus

• Workato Automation Pro or Mule Soft Developer certification
• Experience with Temporal or similar workflow orchestration frameworks
• Prior experience in a SaaS product company supporting customer integrations
• Exposure to data transformation tools like dbt or Informatica

We are an equal opportunity employer and value diversity. All employment is decided on the basis of qualifications, merit and business need.