Senior Integration & Composition EngineerGo Lang

Senior Integration & Composition EngineerGo Lang

Client Job Title: Senior Integration & Composition Engineer
Rate : 70/hr
Location Denver/Englewood CO OR West Chester PA- 3 Days Onsite

Mandatory Skills
JQ Go Template REST API JSON

Skill 1 - 7Yrs of Exp - JQ GO

Skill 2 - 7Yrs of Exp - OOPS Python
Skill 3 - 5Yrs of Exp Scripting AWS REST API Payments

Preferred Skills (Preferred Experience)
Python GO Language Java CI/CD

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:

GO LangJava QueryPythonOOPSPayments