Go lang Developer/ Lead

Client Job Title: Senior Integration & Composition Engineer (Go lang Developer Lead)

Location:  Denver/Englewood, CO // West Chester, PA

Exp: 15+ Years

Relevant: 7+ Years

Payments/Finance Domain Must

Mandatory Skills

JQ, Go Template, REST API, JSON

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