Senior Integration & Composition Engineer (Go lang Developer Lead) Payments

Senior Integration & Composition Engineer (Go lang Developer Lead)-Payments Domain
Rate : 70/hr

Location: Englewood CO Number of days onsite - 3days

Mandatory Areas
Must have Skills -
Skill 1 - 7Yrs of Exp - JQ GO
Skill 2 - 7Yrs of Exp - OOPS Python
Skill 3 - 5Yrs of Exp Scripting AWS REST API Payments

Good To have Skills -
Skill 1 - 3 Yrs of Exp - CI/CD
Skill 2 - 3 Yrs of Exp - Go Template
Skill 3 - 3 Yrs of Exp -
Skill 4 - 3 Yrs of Exp -

Job Description

• Senior Integration & Composition Engineer to design and implement dynamic payload transformations and configuration compositions to integrate multiple systems reliably and efficiently.
• This role focuses on payload composition transformation and system integration across internal systems and external partners.
• The engineer will use JQ and Go templates to implement dynamic request/response mappings configuration-driven workflows and environment-specific integrations while ensuring scalability resiliency and compliance.

Key Responsibilities

• Design and implement integration compositions across APIs services and platforms
  Transform filter and enrich JSON payloads using JQ
• Build reusable and parameterized templates using Go templating
• Compose requests/responses for downstream systems based on business rules
• Support system-to-system integration orchestration and data mapping
• Troubleshoot integration issues related to payload structure and transformations
  Collaborate with platform API and DevOps teams to ensure seamless deployments
  Maintain versioned reusable templates and transformation logic
• Build Go template-driven configurations to support reusable parameterized integrations across environments (DEV QA UAT PROD)
• Integrate 3rd party platforms with upstream channels and downstream providers
  Implement standardized error handling and decline mapping to ensure consistent customer and operational experiences
• Partner with product architecture QA and operations teams to ensure payment integrations meet business regulatory and performance requirements
• Troubleshoot production issues related to payment composition logic payload mismatches or partner integration failures
• Contribute to documentation best practices and reusable integration assets

Required Skills & Experience

• Hands-on expertise with JQ for JSON filtering mapping aggregation conditionals
  Strong proficiency with Go templating including conditionals loops and reusable templates (Helm-style experience is a plus) & payload generation
• Integration & APIs - Experience integrating REST-based payment APIs and event-driven flows. REST APIs JSON HTTP API gateways middleware or integration platforms
• Experience in programming and scripting languages such as GO/Java/Python
• Understanding of payment failure scenarios declines and reconciliation impacts
• Experience supporting high-throughput low-latency transaction systems
• Knowledge in DevOps such as Kubernetes Helm CI/CD Pipeline
• Familiarity with orchestration frameworks
• Strong debugging and problem-solving skills

Preferred / Nice-to-Have

• Prior experience with payment platforms and end-to-end payment lifecycles
• Knowledge of alternative payment methods recurring billing and subscription models
• Exposure to cloud-native deployments CI/CD pipelines and Kubernetes-based platforms

Required Skills:

JQueryPythonGO LangOOPSAWSREST APIPayments