#130515 - Mid-Level Java/MuleSoft Integration Engineer

Upwork • English • Artificial Intelligence • Design & Creative • Java • Apex • 9 hours ago
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≈ $77k – $188k per year (Estimated)
Location
Remote (LATAM)
Seniority
Middle · 3+ years exp
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Upwork

Upwork is an American freelance marketplace formed in 2015 from the merger of Elance and oDesk, and it connects businesses with independent professionals in software development, design, writing, marketing and increasingly artificial intelligence work. Its revenue comes from taking a percentage of what clients pay freelancers, which means it has spent years balancing take rate against the incentive for established pairs to leave the platform and transact directly. Headquartered in San Francisco and listed on Nasdaq, it has been positioning itself around higher-value professional work rather than competing at the commodity end of the market.
upwork.com • HQ: San Francisco, United States • Design & Creative • Sales & Marketing • Artificial Intelligence • 501-1000 employees • Est. 2015

We are seeking a mid-level Java Backend Engineer to build and support service logic, data processing, integrations, and platform-reliability capabilities for business-critical workflows. This contract role combines hands-on development with production troubleshooting, monitoring, incident support, and cross-functional collaboration.

Enterprise experience strongly preferred.

Key Responsibilities

  • Build, maintain, and improve backend Java services and platform components.

  • Develop service logic and data-processing capabilities supporting business-critical workflows.

  • Contribute to integration-layer services and middleware capabilities.

  • Partner with technical and operational stakeholders to resolve integration issues.

  • Diagnose and resolve API and integration failures affecting downstream Salesforce Service Cloud processes.

  • Participate in a developer production-support rotation and operational review process.

  • Triage critical alerts and monitor health indicators for Java services and platform components.

  • Handle urgent operational work, track open incidents, and document findings.

  • Keep sprint data and work status current through tickets, standups, and team communication channels.

  • Follow established engineering and DevOps processes and complete assigned work reliably and on schedule.

Must-Have Skills

  • 3-5 years of relevant experience.

  • Hands-on Java development experience.

  • Backend software engineering experience.

  • Hands-on API and integration experience.

  • Production troubleshooting and incident-support experience.

  • Experience with production monitoring, alert triage, and service or platform health.

  • Experience diagnosing and resolving API or integration failures.

Nice-to-Have Skills

  • MuleSoft experience, strongly desired.

  • Salesforce Service Cloud integration experience.

  • Enterprise integration or middleware experience.

  • Message-based or asynchronous integration experience.

  • Data-processing or data-transformation experience.

  • CI/CD and DevOps experience.

  • Experience with monitoring or observability tools.

Required Tools & Platforms

  • Java.

  • Backend service-development environments.

  • API and integration environments.

  • Production monitoring and alerting environments.

Location, Time & Engagement

  • Remote contract opportunity.

  • Candidates must be based in an eligible LATAM location.

  • Full US Central Time working hours are required.

  • 100% allocation, assumed to be 40 hours per week.

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