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Senior MuleSoft Integration Developer – Managed Services @ SquareOne
  • Warsaw
Senior MuleSoft Integration Developer – Managed Services @ SquareOne
Warszawa, Warsaw, Masovian Voivodeship, Polska
SquareOne
5. 2. 2026
Informacje o stanowisku

Join our Managed Services team as a Senior MuleSoft Integration Developer, supporting enterprise-grade integrations and API solutions. You will work closely with Service Delivery Managers, Architects, and clients to maintain, enhance, and optimize MuleSoft-based integration landscapes. This role focuses on ensuring high availability, performance, and scalability of integrations across cloud, hybrid, and on-premises environments while adhering to ITIL processes and managed service standards.


Technology Stack:

  • MuleSoft & Integration: Mule 4, Anypoint Platform (Studio, Design Center, API Manager, Exchange), DataWeave, Salesforce Integration
  • API & Standards: REST, SOAP, RAML, OpenAPI, API-led connectivity
  • Messaging & Connectors: JMS, Kafka, MuleSoft connectors/protocols
  • Security: OAuth 2.0, JWT, mTLS/TLS, client credential management, API gateway policies
  • Deployment & Infrastructure: CloudHub/CloudHub 2.0, Runtime Fabric (Kubernetes), hybrid/on-prem topologies, VPC, VPN, Private Spaces, environment promotion strategies
  • Monitoring & Observability: Anypoint Monitoring, Anypoint Visualizer, ELK, Prometheus, Grafana, Datadog
  • Performance & Stability: Resiliency patterns (retries, Dead Letter Queues, idempotency), performance tuning
  • ITIL / Managed Services: Incident, problem, and change management experience

Requirements – Must Have:

  • Proven experience integrating Salesforce with MuleSoft and understanding Salesforce-MuleSoft integration patterns.
  • MuleSoft certifications: MCD Level 1, Integration Architect, Platform Architect, API Design Associate.
  • Expertise in Mule 4 and Anypoint Platform, with strong DataWeave skills.
  • Deep understanding of API-led connectivity and integration patterns.
  • Experience with REST/SOAP, RAML/OpenAPI, messaging (JMS/Kafka), and connectors/protocols.
  • Strong knowledge of security best practices: OAuth 2.0, JWT, mTLS/TLS, client credential management, and API gateway policies.
  • Hands-on experience with deployment topologies: CloudHub, Runtime Fabric, hybrid/on-prem; familiarity with VPCs, VPNs, Private Spaces, and environment promotion strategies.
  • Proficiency in monitoring and debugging tools, performance tuning, and resiliency patterns.
  • Proven track record in managed services or IT support projects in an international environment.
  • Leadership skills with a collaborative and team-oriented mindset.

Requirements – Nice to Have:

  • Experience managing a small project team, including task assignment, progress supervision, and end-to-end solution quality ownership.
  • Willingness to learn and adopt new technologies and integration solutions.

Join our Managed Services team as a Senior MuleSoft Integration Developer, supporting enterprise-grade integrations and API solutions. You will work closely with Service Delivery Managers, Architects, and clients to maintain, enhance, and optimize MuleSoft-based integration landscapes. This role focuses on ensuring high availability, performance, and scalability of integrations across cloud, hybrid, and on-premises environments while adhering to ITIL processes and managed service standards.

,[Drive technical support, maintenance, and enhancement of MuleSoft integrations and APIs in collaboration with the Service Delivery Manager, ensuring alignment with business objectives., Support platform upgrades (Mule runtime, Anypoint Platform) including impact analysis, development/configuration, testing, and deployment., Create and maintain technical documentation, runbooks, and operational procedures., Mentor junior developers and promote a culture of learning, quality, and technical excellence., Identify and lead initiatives to improve performance, reliability, cost-efficiency, and developer productivity across the integration landscape., Collaborate with clients, architects, and stakeholders to translate business requirements into scalable API-led MuleSoft solutions; provide estimates and design guidance., Troubleshoot complex incidents, conduct root cause analysis, and implement preventive measures to enhance system stability., Improve observability of integrations through logging, metrics, tracing, dashboards, and alerts. Requirements: MuleSoft, MCD Level 1, Integration Architect, Platform Architect, API Design Associate, Mule 4, Anypoint Platform, DataWeave, REST/SOAP, RAML, OpenAPI, JMS, Kafka, oAuth 2.0, JWt, mTLS, TLS, CloudHub, Runtime Fabric, VPCs, VPNs, Monitoring, Debugging, Collaborative skills

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