> Markdown version of [/jobs/ext/3535367-software-architect-sr-lead](https://www.wearedevelopers.com/jobs/ext/3535367-software-architect-sr-lead). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Architect Sr Lead - **Company:** FIS, Inc. - **Location:** Jacksonville, FL, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), IBM AIX, Amazon Web Services, Microsoft Azure, Databases, Linux, Distributed Systems, Memory Management, Payment Systems, IBM Websphere Application Server, Java Virtual Machine (JVM), PostgreSQL, OpenShift, Oracle (Applications), Performance Tuning, Software Architecture, Software Engineering, Transaction Processing (Computing), Diagnostic Tools, Java Application Server, Concurrency, Caching, Kubernetes - **Published:** October 2, 2026 - **Apply:** https://jobs.localjobnetwork.com/apply/add/88033736/1 ## About the Role * Strong hands-on software engineering background with deep Java/JVM expertise and a genuine interest in reading, understanding and improving code. * Proven experience in performance engineering, performance tuning or software architecture for complex enterprise systems. * Strong understanding of concurrency, garbage collection, memory management, I/O, thread pools, locking, asynchronous processing and distributed system behavior. * Experience using Java profiling and diagnostic tools such as Java Flight Recorder, async-profiler, JProfiler or equivalent tooling. * Ability to connect metrics with code behavior and convert evidence into clear, actionable technical recommendations. * Strong communication skills and the confidence to challenge design choices constructively with engineering, architecture and product stakeholders. Bonus if you have * Experience with payment platforms, banking systems, high-volume transaction processing or other mission-critical financial technology environments. * Knowledge of OPF, payment hubs, SEPA, SWIFT, instant payments, clearing, settlement or related payment processing concepts. * Experience with Oracle, PostgreSQL, MQ, Kubernetes, OpenShift, Azure, AWS, Linux/AIX, WebSphere or Open Liberty. * Experience leading technical investigations, mentoring senior engineers or driving architecture-level performance improvements across distributed teams. * Exposure to load, stress, endurance and resilience testing practices for large-scale enterprise platforms ## Description You will join FIS' Non-Functional Engineering (NFE) team, the group accountable for the performance, scalability and resilience of the OPF payments product line. Operating globally across EMEA, the US, APAC and India, the team defines and validates the non-functional requirements behind mission-critical payment platforms, engineers the load, stress and endurance testing that proves them, and translates measured evidence into tuning, sizing and architecture decisions. Our purpose is straightforward: ensure FIS products are fast, predictable and resilient at real production scale, long before a customer ever feels a bottleneck., As a Software Architect Lead, you will own deep technical analysis that explains how our payment platforms behave under load and how to make them significantly faster. You will profile running systems, dissect runtime behavior, challenge design decisions and work shoulder to shoulder with the engineers who build the product. You will not simply report findings. You will prototype, measure and prove optimizations that turn analysis into quantifiable gains in throughput, latency and cost. * Profile Java applications end to end across CPU, memory, threads and I/O, using tools such as Java Flight Recorder, async-profiler and JProfiler to isolate hot paths that constrain throughput. * Analyze thread dumps to diagnose lock contention, deadlocks, thread-pool exhaustion and blocking I/O, then reshape the concurrency model to remove the constraint. * Use performance test evidence, logs, telemetry and code-level analysis to identify bottlenecks across application, database, messaging, network and platform layers. * Prototype and validate technical improvements, including code, configuration, JVM, database, caching, messaging and deployment-level optimizations. * Translate measured performance results into practical architecture recommendations, sizing guidance and engineering actions for product and delivery teams. * Act as a technical reference point for non-functional architecture, coaching engineers on performance-aware design, scalability patterns and resilient implementation choices. ## Related Videos - [Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?](https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready) - [HTTP headers that make your website go faster](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Enterprise-Cloud-Native - Fast-Paced Development & Deployment in a Highly Secure Banking Environment](https://www.wearedevelopers.com/videos/671-enterprise-cloud-native-fast-paced-development-deployment-in-a-highly-secure-banking-environment) - [Event based cache invalidation in GraphQL](https://www.wearedevelopers.com/videos/433-event-based-cache-invalidation-in-graphql) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)