Integration Support Lead

Company Overview

Pay10 is building a next-generation, cloud-native fintech platform designed for scale, reliability, and regulatory compliance. As our platform grows, ensuring uninterrupted operations and seamless external integrations is critical to our success.

We are looking for a Lead Integration Support Engineer (Full Stack / L3) to act as the technical guardian of our live systems. This role goes beyond traditional application support. You will combine deep software engineering expertise with operational ownership, performing code-level diagnosis, guiding merchant integrations, and ensuring rapid resolution of complex production issues in a highly regulated payments environment.

You will work at the intersection of engineering, operations, and external partners , protecting platform uptime while enabling faster merchant onboarding and stable payment flows.

About Job

Key Responsibilities

• Own code-level diagnosis of production issues, performing deep debugging across backend services, APIs, frontend components, and databases to reduce MTTR .
• Act as the senior technical escalation point for L3 incidents , driving root-cause analysis and defining precise technical fixes in collaboration with engineering teams.
• Ensure merchant integration success by providing hands-on technical guidance for payment APIs, SDKs, and checkout flows, supporting onboarding through go-live.
• Support and troubleshoot Alternative Payment Method (APM) integrations/TPP SDK , including wallets, and instant payment methods.
• Monitor and investigate system health using observability and debugging tools , analyzing logs, metrics, and transaction flows to proactively identify and resolve issues.
• Support enterprise integrations through ESB (Enterprise Service Bus) / middleware layers , troubleshooting message routing, transformation, and connectivity issues.
• Assist with Identity Management and access-related issues, including SSO, authentication, and authorization flows for internal platforms.
• Apply DevOps fundamentals to production support, including environment configuration, release support, and basic automation using scripts or tools.
• Collaborate with engineering, DevOps, security, and product teams to improve platform reliability, stability, and operational readiness.
• Contribute to technical documentation and integration guides to reduce recurring support issues and improve developer experience.

Required Skills & Experience

• 10+ years of experience in software development and/or L3 production support .
• Strong full-stack debugging skills with Java-based backend systems and modern web technologies.
• Experience in banking, payments, or fintech environments .
• Hands-on exposure to observability, monitoring, and logging platforms .
• Working knowledge of SQL and NoSQL databases .
• Experience supporting merchant integrations, APIs, SDKs, and APMs .
• Familiarity with ESB / middleware architectures and identity management concepts .
• Strong ownership mindset and ability to operate effectively in high-availability, regulated environments .