Back-End Senior Software Engineer

As a Lead Software Engineer with strong back-end expertise, you’ll start your day aligning with designers, engineers, and product managers to set goals and clarify priorities. Your focus will be on driving Java and Spring Boot–based services, APIs, and integrations that power scalable fintech applications, while staying close enough to the front-end to guide smooth end-to-end delivery. You’ll also drive adoption of AI-assisted engineering practices, setting the tone for how others on your team should leverage AI for code quality, reviews, and system design.Throughout the day, you’ll lead technical design discussions, provide high-level estimates (LOEs), and prioritize features versus technical debt. You’ll unblock developers, assign work, and ensure test coverage and documentation are complete. You’ll coordinate across teams on large-scale service dependencies, guide code reviews, and troubleshoot complex production issues. By day’s end, you’ll review pull requests, mentor engineers, and refine sprint goals, balancing hands-on coding in the back-end stack with setting the technical direction of the team.

You will collaborate with cross-functional teams to drive innovation and enhance our platform’s capabilities, ensuring our systems are secure, scalable, and built for the future of financial technology.

• Drive technical designs for services, APIs, and integrations using Java and Spring Boot
• Provide LOEs, assess trade-offs between features vs. tech debt, and guide sprint planning
• Ensure robust unit/component/appflow test coverage and technical documentation

• Write clean, scalable, and secure back-end code powering microservices and APIs
• Integrate services with data stores (PostgreSQL, Redis) and event-driven systems (ActiveMQ, Temporal)
• Troubleshoot issues across distributed services, environments, and configs

• Assign and unblock work across sprints, ensuring the team delivers on priorities
• Conduct and coordinate code reviews for complex PRs
• Mentor engineers, raising the bar on technical depth and coding practices
• Partner with QA on test strategies and ensure high-quality releases
• Champion AI-forward best practices, mentoring engineers on integrating AI tools into their workflow

• Collaborate with product managers, architects, and other teams on release scope and dependencies
• Support release deployments, tenant configurations, and environment setup
• Lead post-mortem reviews and continuous improvement efforts
• Communicate technical status and project risks to stakeholders

• 8+ years of software development experience, with deep back-end expertise in Java, Spring Boot, and RESTful APIs/microservices
• Experience designing and integrating large-scale, service-oriented architecture
• Experience adopting or guiding teams in AI-driven development workflows
• Experience with several of the following present in the environment; Java, Spring Boot, Micronaut, Temporal, ActiveMQ, PostgreSQL, Redis, Kubernetes, AWS, Jenkins, Git, ReactJS
• Familiarity with event-driven systems (ActiveMQ, Temporal) and data stores (PostgreSQL, Redis)
• Some front-end exposure (JavaScript/TypeScript, React) to support end-to-end coordination
• Experience leading engineering teams or serving as a Tech Lead, mentoring, reviewing code, and driving technical strategy
• Strong understanding of performance tuning, scalability, and distributed system challenges
• Comfortable in agile environments with tools like Jira, Confluence, and Git

ReactJs, Java, Springboot, Micronaut, Temporal, ActiveMQ, Postgres, Redis, Kubernetes, AWS, Jenkins, Git

• Most positions are hybrid (3 days onsite) in our FIS Office locations in Chicago (Illinois), Milwaukee (Wisconsin), Atlanta (Georgia) and Jacksonville (Florida).
• Current and future sponsorship not available for this position

• 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.

• FIS is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, marital status, genetic information, national origin, disability, veteran status, and other protected characteristics. The EEO is the Law poster is available here supplement document available here
• For positions located in the US, the following conditions apply. If you are made a conditional offer of employment, you will be required to undergo a drug test. ADA Disclaimer: In developing this job description care was taken to include all competencies needed to successfully perform in this position. However, for Americans with Disabilities Act (ADA) purposes, the essential functions of the job may or may not have been described for purposes of ADA reasonable accommodation. All reasonable accommodation requests will be reviewed and evaluated on a case-by-case basis.

• 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.