Description
Senior Software Engineer
Engineering • Bangalore, India (Hybrid) • Full-Time
Mission-Critical Core Banking Platform • Cloud-Native • Low-Latency Transaction Processing
About the Role

ACI Worldwide is seeking a Senior Software Engineer to join the team building and operating a mission-critical, low-latency core banking platform. Our product is architected cloud-natively and containerized from the ground up, deployed initially on Microsoft Azure / AKS with a transparent roadmap to Red Hat OpenShift, AWS, and Google Cloud Infrastructure (GCI). Every design decision — from threading models to deployment topology — is made with high throughput, sub-millisecond latency, and five-nines availability in mind.

This is a full-stack engineering role in the deepest sense: you will design and build features end to end, own the reliability and performance of what you ship, actively contribute to the CI/CD pipeline and quality strategy, and provide L3 production support when the platform counts on it. We are also on an active modernization journey,



migrating mission-critical COBOL logic to modern Java services, and your ability to read, understand, and translate legacy COBOL will be highly valued.

We are looking for self-motivated, driven engineers who take pride in craftsmanship, embrace AI as an accelerator across the full development lifecycle, and are genuinely excited to grow their careers at ACI Worldwide.
Location & Work Model

Location: Bangalore , India
Work Model: Hybrid — on-site on designated days; remote-eligible on other days per team and business needs
Key Responsibilities

1) Low-Latency Application Engineering
- Design, implement, and optimize high-performance Java services for real-time transaction processing: payments, authorization, clearing, and settlement workflows where latency and correctness are non-negotiable.
- Apply deep JVM knowledge — threading models, garbage collection tuning, lock-free data structures, and async I/O — to sustain predictable

📌 Sr Software Engineer (Bengaluru)
🏢 ACI Worldwide
📍 Bengaluru