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