Senior Business Systems Engineer

Job title: Senior Business Systems Engineer

About the Role Block's Business Systems Integration team powers the end-to-end systems that drive CRM, Procurement, Finance, Hardware supply chain, logistics, fulfillment, and after-sales service. This hands-on role seeks a Senior Business Systems Engineer with strong API and integration expertise to design, build, and optimize integrations across CRM, Oracle Fusion Cloud, Salesforce, and related systems. You will collaborate with Sales, Support, Supply Chain, and Finance to translate business needs into scalable, high-impact solutions.

What You'll Do

• Design integrations across enterprise systems including Salesforce, Oracle Cloud, Snowflake, Looker, and external partner systems using MuleSoft or other Integration iPaaS platform.
• Design and build Python-based tools for supporting integrations and automations and process optimization.
• Write and optimize SQL scripts for data extraction, transformation, reconciliation, and analytics.
• Collaborate with partner engineering and operations teams to ensure integration robustness, security, and scalability.
• Create and execute unit, integration, and regression tests for custom components and data flows.
• Monitor and support launched integrations and automations, using metrics and logs to continuously improve reliability and performance of the platform.
• Contribute to technical documentation, design reviews, and version control using GitHub and modern DevOps practices.
• Lead incident response and root cause analysis for critical production applications and integrations.

What We're Looking For

• 8+ years architecting, designing, and scaling enterprise APIs and integrations in high-volume environments.
• 4+ years of hands-on experience in one of the iPaaS Integration platforms, preferably MuleSoft.
• 3+ years of recent hands-on experience with programming languages (Python, Kotlin, Java or Go).
• Experience leveraging Claude Code, Codex, Cursor, Windsurf or any of the LLM based tools for Productivity enhancements.
• Experience leveraging AI/ML-based automations for automating technical and business processes.
• Hands-on experience integrating with enterprise business systems such as Salesforce, Oracle Fusion Cloud, Workday or SAP.
• Advanced proficiency in SQL and familiarity with data pipelines in Airflow, Fivetran, Prefect or Databricks.
• Familiarity in working in Cloud platforms, preferably AWS, and services like S3, Lambda, SQS, RDS.
• Solid understanding of software engineering best practices including code reviews, CI/CD pipelines, and documentation.
• Excellent communication and collaboration skills able to translate functional requirements from stakeholders into a technical design.
• Proven track record of delivering complex integrations for procurement, finance, or supply chain systems.
• Deep commitment to delivering quality products.
• Experience managing complex applications and integrations in Production, providing KTLO support and root cause analysis.

Nice to Have

• Certifications in MuleSoft, AWS Experience or familiarity in building MCP servers, using Python or Typescript, for exposing tools and processes to Agentic workflows.

Compensation & Benefits

• Block takes a market-based approach to pay, and pay may vary depending on location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.