Staff Software Engineer, Backend

Flex

full-time

Posted on: 9/3/2025

Location: 🇺🇸 United States

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💰 $199,000 - $262,000 per year

Lead

AWSDistributed SystemsDockerDynamoDBGradleJavaJUnitKubernetesMySQLNoSQLPostgresRuby on RailsSpringTerraform

About the role

Help set technical direction and shape the long-term architecture of backend services while remaining hands-on with coding and delivery
Design, build, and scale backend services and APIs that power Flex’s consumer apps, partner integrations, and core platforms
Collaborate across engineering, product, design, and other stakeholders to ensure scalable, reliable, and impactful systems
Provide technical leadership and guidance on system architecture, long-term vision, and team best practices
Lead the delivery of highly impactful products end-to-end, from requirements gathering to rollout, with high quality and timeliness
Mentor and support engineers, elevating technical standards and fostering growth
Build robust, fault-tolerant systems with multiple external dependencies in distributed environments
Drive adoption of best practices across the engineering org, including testing, observability, automation, and CI/CD
Operate services in production with high availability, leveraging monitoring and observability tools
Contribute to evolving Flex’s service-oriented architecture, REST APIs, message queues, and scalable system design

6–8+ years of professional software engineering experience, with a focus on backend development
4+ years of hands-on Java experience (Spring core/web/boot, Gradle, JUnit, JVM tuning & performance)
Strong computer science fundamentals and proven experience designing scalable, distributed systems
Experience leading the delivery of multiple high-impact projects end-to-end
Skilled at working with both technical and non-technical stakeholders, aligning on scope and delivery
Ability to write high-quality, testable, maintainable, and secure code
Hands-on experience with AWS (EKS, Aurora RDS, Elasticache, DynamoDB), containerization (Docker/Kubernetes), and relational + NoSQL databases (MySQL, PostgreSQL, DynamoDB)
Proficient with CI/CD pipelines (GitHub Actions preferred), git, and build automation
Familiar with observability and monitoring tools (e.g., DataDog)
Excellent communicator, comfortable collaborating in globally distributed teams
Track record of mentoring engineers and raising team standards through best practices
Bonus: Experience in FinTech and familiarity with major payment rails; experience with big data platforms (e.g., Snowflake); Infrastructure as Code (CDK/Terraform)