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