Senior Software Architect

FIS; Warszawa; On-site; PLN 176,000 - 281,000; Full time

Benefits offered by this job

Impact in fintech

Learning & development

Inclusive, diverse environment

Community involvement

Competitive salary & benefits

Job summary

FIS in Warsaw seeks a Senior Software Architect to lead strategy and execution for performance, reliability, and resilience engineering of enterprise-grade payments applications.

You will drive non-functional quality, design tests, and optimize across Java apps, databases, and middleware while mentoring engineers and embedding quality in the SDLC. This role blends hands-on development with architectural leadership in a regulated fintech environment.

Qualifications

• Senior Software Architect responsible for performance, reliability and resilience engineering for enterprise-grade applications.
• Design CI-driven quality gates and automated tests to ensure software quality.
• Expertise in Java technologies (JDK 8/17, JEE, Maven, Hibernate, EJB, MQ, SQL, REST, XML/XSD, JSON).

Responsibilities

• Lead non-functional quality strategy across performance, scalability, resilience, and availability.
• Design and execute performance, load, stress, and endurance testing.
• Analyze system behavior using monitoring and observability tools.
• Partner with engineering and architecture teams to embed quality early in the SDLC.
• Drive performance optimization across Java applications, databases, and middleware.
• Establish CI-driven quality gates using automated functional and non-functional tests.
• Validate applications across application servers and containerized environments.
• Troubleshoot complex production issues and lead root-cause analysis.
• Mentor engineers on non-functional testing practices and quality standards.
• Extensive hands-on experience in application development and quality engineering.
• Strong expertise in Java (JDK 8/17), JEE, Maven, Hibernate, EJB, MQ, SQL, REST, XML/XSD, JSON.
• Proven experience monitoring and analyzing application performance.
• Advanced skills in performance, high-availability, and resilience testing.
• Experience with CI/CD pipelines and automated test frameworks (e.g., Jenkins).
• Knowledge of application servers (WebSphere, WebLogic, JBoss, Open Liberty).
• Strong database experience with Oracle or PostgreSQL, including performance tuning.
• Proficiency in Linux-based and containerized environments.
• Experience with Docker and Kubernetes in production.
• Knowledge of Kafka or event-driven architectures.
• Experience in payments domains (e.g., SEPA, SWIFT).
• Advanced REST API design and optimization skills.
• Deep PostgreSQL performance and scalability expertise.

Skills

Java

JEE

Hibernate

EJB

MQ

SQL

REST

XML/XSD

JSON

PostgreSQL

Oracle

WebSphere

WebLogic

JBoss

Open Liberty

CI/CD

Jenkins

Kubernetes

Docker

Linux

Monitoring/Observability

Performance Tuning

Event-driven architecture

Kafka

Tools

Maven

Jenkins

Docker

Kubernetes

WebSphere

WebLogic

Open Liberty

Oracle

PostgreSQL

Job description

Our technology powers the world’s economy, and our teams bring innovation to life. We champion diversity to deliver the best products and solutions for our colleagues, clients, and communities. If you’re ready to learn, grow, and make an impact with a career in fintech, we’d like to know:

Are you FIS?

About the Role

As a Senior Software Architect, you will lead the strategy and execution of performance, reliability, and resilience engineering for enterprise‑grade applications. You’ll ensure systems meet demanding non‑functional requirements for scale, availability, and security within a regulated payments environment. Success in this role is measured by predictable performance, high availability, and production stability across complex distributed systems.

What You Will Be Doing

• Lead non‑functional quality strategy across performance, scalability, resilience, and availability
• Design and execute performance, load, stress, and endurance testing
• Analyze system behavior using monitoring and observability tools
• Partner with engineering and architecture teams to embed quality early in the SDLC
• Drive performance optimization across Java applications, databases, and middleware
• Establish CI‑driven quality gates using automated functional and non‑functional tests
• Validate applications across application servers and containerized environments
• Troubleshoot complex production issues and lead root‑cause analysis
• Mentor engineers on non‑functional testing practices and quality standards
• Extensive hands‑on experience in application development and quality engineering
• Strong expertise in Java (JDK 8/17), JEE, Maven, Hibernate, EJB, MQ, SQL, REST, XML/XSD, JSON
• Proven experience monitoring and analyzing application performance
• Advanced skills in performance, high‑availability, and resilience testing
• Experience with CI/CD pipelines and automated test frameworks (e.g., Jenkins)
• Knowledge of application servers (WebSphere, WebLogic, JBoss, Open Liberty)
• Strong database experience with Oracle or PostgreSQL, including performance tuning
• Proficiency in Linux‑based and containerized environments
• Experience with Docker and Kubernetes in production
• Knowledge of Kafka or event‑driven architectures
• Experience in payments domains (e.g., SEPA, SWIFT)
• Advanced REST API design and optimization skills
• Deep PostgreSQL performance and scalability expertise

What We Offer You

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

“FIS is committed to providing its employees with an exciting career opportunity and competitive compensation. The pay range for this full-time position is 175,900.00 - 281,440.00 PLN Annual and reflects the minimum and maximum target for new hire salaries for this position based on the posted role, level, and location. Within the range, actual individual starting pay is determined by additional factors, including job-related skills, experience, and relevant education or training. Any changes in work location will also impact actual individual starting pay. Please consult with your recruiter about the specific salary range for your preferred location during the hiring process.”