Performance Engineer Architect(Non Functional Engineer)- Bangalore/Pune

FIS India Bangalore; India; On-site; INR 2,500,000 - 4,000,000; Full time

Benefits offered by this job

Competitive salary and benefits

Professional learning

Inclusive work environment

Privacy protection

Community support

Job summary

FIS India Bangalore is seeking an experienced Non-Functional Engineer to design, implement, and automate tests validating non-functional requirements of backend payment-processing software for large banks. You will work with architects, developers, DevOps, and stakeholders to identify bottlenecks and improve reliability and performance.

The role emphasizes testing across legacy IBM WebSphere and modern Open Liberty Java apps, cloud-native Kubernetes deployments, and CI/CD automation in

Qualifications

• Multiple years of non-functional, performance, load, stress, scalability, or resilience testing.
• Design automated tests for high-volume backend or distributed systems.
• Strong knowledge of Java and the JVM incl. memory, GC, threading, pools, dumps, and profiling.
• Experience with IBM WebSphere and Open Liberty servers.
• Cloud-native architectures; Kubernetes experience; CI/CD with Jenkins and Maven.
• Observability platforms: Grafana, Kibana, Elasticsearch.
• Analyze logs, metrics, JVM stats, and distributed-system behavior to find root causes.

Responsibilities

• Define test approaches for non-functional requirements such as throughput, latency, and scalability.
• Create and maintain automated non-functional test suites across WebSphere, Open Liberty, and Kubernetes apps.
• Translate requirements into measurable acceptance criteria and workload models.
• Automate test provisioning, execution, monitoring, and reporting in CI/CD pipelines.
• Analyze infrastructure and JVM metrics to identify bottlenecks and resolve issues.
• Produce clear test reports with objectives, environment, workloads, results, and recommendations.

Skills

Non-functional testing

Performance testing

Load testing

Stress testing

Scalability testing

Resilience testing

Java applications

JVM tuning

CI/CD pipelines

Kubernetes

Jenkins

Maven

Education

Bachelor’s or Master’s in computer science / software engineering / IT

Tools

IBM WebSphere

Open Liberty

Kubernetes

Jenkins

Maven

Grafana

Kibana

Elasticsearch

Job description

About us

At FIS, our technology and our people are moving forward. We advance the way the world pays, banks and invests. We believe in building inclusive, diverse teams. Together, we innovate to help our colleagues, clients and communities succeed. If you’re ready to grow your career and make an impact in fintech, we have one question: Are you FIS?

About the Role

We are looking for an experienced Non-Functional Engineer to join a team developing backend payment-processing software for large international banks. Our technology landscape includes legacy applications deployed on IBM WebSphere, modernized Java applications running on Open Liberty, and cloud-native applications deployed on Kubernetes. Our payment solutions are standardized around SWIFT messaging and must meet demanding requirements for performance, scalability, resilience, availability, and operational stability. The Non-Functional Engineer will be responsible for designing, implementing, maintaining, and automating tests that validate the non-functional requirements of our software. You will work closely with architects, developers, DevOps engineers, and other stakeholders to identify bottlenecks, investigate failures, and improve the overall reliability and performance of the platform. You will also support the analysis and resolution of non-functional issues reported by customers in production environments.

What You Will Be Doing

Define test approaches and test scenarios for non-functional requirements, including:

• Transaction throughput
• Network bandwidth and data volume
• Response times and latency
• Scalability
• Resilience and fault tolerance
• High availability and recovery
• Resource consumption
• Stability under sustained load
• Behaviour during infrastructure or dependency failures

Create, maintain, and execute automated non-functional test suites for:

• Legacy Java applications running on IBM WebSphere
• Java applications deployed on Open Liberty
• Cloud-native applications running on Kubernetes

Translate architectural and business requirements into measurable non-functional acceptance criteria. Develop realistic workload models that represent payment-processing patterns used by large banks. Validate application behaviour under normal, peak, stress, endurance, and failure conditions. Automate the provisioning, execution, monitoring, and reporting of non-functional tests. Integrate non-functional testing into Maven and Jenkins-based CI/CD pipelines. Analyse application, infrastructure, JVM, network, and container-level metrics to identify bottlenecks and abnormal behaviour. Use logs, metrics, traces, and test results to perform root‑cause analysis. Work with architects and developers to diagnose and resolve issues identified during non-functional testing. Reproduce and investigate performance, capacity, resilience, and stability issues reported by customers.

Provide clear test reports containing:

• Test objectives and assumptions
• Environment and configuration details
• Workload characteristics
• Results and observations
• Identified bottlenecks
• Risks and limitations
• Recommended corrective actions

Establish performance baselines and detect regressions between software versions. Contribute to standards, reusable test components, automation frameworks, and engineering best practices for non-functional validation. Support capacity planning and provide evidence-based recommendations for application and infrastructure sizing.

Required Qualifications

Strong experience with non‑functional, performance, load, stress, scalability, or resilience testing. Experience designing automated tests for high‑volume backend or distributed systems. Strong knowledge of Java applications and the Java Virtual Machine, including:

• JVM memory management
• Garbage collection
• Threading and concurrency
• Connection pools
• Heap and thread dump analysis
• CPU and memory profiling

Experience testing applications deployed on one or more Java application servers, preferably:

• IBM WebSphere Application Server
• Open Liberty

Good understanding of cloud‑native and containerized application architectures. Practical experience with Kubernetes, preferably standard or vanilla Kubernetes distributions. Experience with CI/CD and build automation tools, particularly:

• Jenkins
• Maven

Experience using observability and analysis platforms such as:

• Grafana
• Kibana
• Elasticsearch

Ability to analyse application logs, infrastructure metrics, JVM statistics, and distributed‑system behaviour. Good scripting or programming skills for test and workflow automation. Good understanding of networking concepts relevant to non‑functional testing, including:

• Bandwidth
• Latency
• TCP connections
• Load balancing
• Timeouts
• Retries
• Network saturation

Experience working with relational databases, messaging systems, REST APIs, or other backend integrations. Strong analytical and problem‑solving skills.

Preferred Skills

Knowledge of OpenTelemetry, including metrics, logs, distributed traces, instrumentation, and context propagation. Experience with payment‑processing systems, financial services, or large banking environments. Knowledge of SWIFT messaging and payment standards. Experience testing high‑throughput, business‑critical, or highly available systems. Experience with resilience and failure testing, including:

• Pod or process termination
• Network disruption
• Dependency unavailability
• Database or messaging failures
• Resource exhaustion
• Rolling upgrades and failover

Experience with performance‑testing tools such as JMeter, Gatling, NeoLoad, k6, or equivalent platforms. Experience with infrastructure or environment automation. Knowledge of Kubernetes observability, resource management, autoscaling, health checks, and scheduling. Experience with JVM profiling and diagnostic tools. Familiarity with site reliability engineering, capacity engineering, or chaos‑engineering practices.

Collaboration and Stakeholder Responsibilities

The Non‑Functional Engineer will work closely with:

• Solution and application architects to define measurable non‑functional requirements.
• Developers to identify bottlenecks and implement corrective actions.
• DevOps and platform engineers to create representative and repeatable test environments.
• Test engineers to align functional and non‑functional validation.
• Support teams to investigate customer‑reported issues.
• Product and delivery stakeholders to communicate risks, results, and release readiness.

The engineer is expected to communicate technical findings clearly and to turn test results into practical recommendations for both development teams and stakeholders. Approaches performance and resilience testing as an engineering discipline rather than a one‑time test activity. Is comfortable working across application code, JVM behaviour, infrastructure, Kubernetes, networking, and observability. Can independently investigate complex problems involving multiple components. Values automation, repeatability, measurable acceptance criteria, and evidence‑based conclusions. Can collaborate constructively with developers and architects to resolve issues rather than only report them. Understands the quality and reliability expectations associated with software used by large financial institutions. Can work effectively in an environment containing legacy, modernized, and cloud‑native technology stacks.

Qualifications

Bachelor’s or master’s degree in computer science, software engineering, information technology, or equivalent professional experience. Several years of experience in non‑functional testing, performance engineering, software engineering, DevOps, site reliability engineering, or a related technical role. Professional working proficiency in English.

What We Offer You

At FIS, you can grow your career as far as you want to take it.

Here’s what else we offer:

• Opportunities to make an impact in fintech
• Personal and professional learning
• Inclusive, diverse work environment
• Resources to give back to your community
• Competitive salary and benefits
• Privacy Statement

FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice.

Sourcing Model

Recruitment at FIS works primarily on a direct sourcing model; a relatively small portion of our hiring is through recruitment agencies. FIS does not accept resumes from recruitment agencies which are not on the preferred supplier list and is not responsible for any related fees for resumes submitted to job postings, our employees, or any other part of our company.

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