[Remote] Staff Software Engineer, Fullstack (Marketing)

Note: The job is a remote job and is open to candidates in USA. Flex is a growth-stage FinTech company headquartered in NYC, focused on creating the best rent payment experience. They are seeking a Staff Software Engineer to develop and scale platform and app experiences that empower users and partners, driving the company's growth trajectory.ResponsibilitiesFocus on creating exceptional user and partner experiences that drive engagement and retentionPartner closely with product managers, designers, and data scientists, data analysts to identify and solve critical user onboarding challengesDesign, develop, test, and deploy robust APIs, services and data pipelines that enhance user onboarding and overall platform experienceImplement changes through an agile methodology, prioritizing rapid iteration and continuous improvementUtilize data and analytics to measure the impact of your work and identify opportunities for optimizationSkills7+ years of professional software development experience3+ years of hands-on experience with Java3+ years of experience with React or React Native3+ years of experience with TypeScriptHaving experience building high-quality mobile and web UIs to specifications is a must to haveProficient in Java frameworks and tools used at Flex, including Spring (core/web/boot), Gradle, JUnit, and JVM (memory/performance tuning, GC)Experience with Service-Oriented Architecture, REST APIs, Message Queues, and scalable architecturesExperience with architectures and tools in React Native and React ecosystems (Hooks, Components, Context, Redux)Experience with AWS (EKS, Aurora RDS, Elasticache, DynamoDB) and containerization toolsHave the experience to build and improve user onboarding funnel and design the comprehensive experiment to drive metric improvementsProficient in CI/CD systems (preferably GitHub Actions), git, and automationSkilled in observability and monitoring tools, such as DataDog, to ensure high availabilityExperienced with big data platforms and tooling, including SnowflakeProficient in Infrastructure as Code, using tools like CDK and TerraformSkilled at elevating team standards through best practices, and mentoring junior engineersExcellent written and verbal communicator, with experience in cross-functional collaborationBenefitsCompetitive medical, dental, and visionCompany equity401(k) plan with company matchUnlimited paid time off + 13 company paid holidaysParental leaveFlex Cares Program: Non-profit company match + pet adoption coverageFree Flex subscriptionCompetitive compensation + company equityUnlimited PTORelocation assistance programCompany OverviewFlex enables people to pay rent bills on a schedule that fits their personal finances. It was founded in 2019, and is headquartered in New York, New York, USA, with a workforce of 201-500 employees. Its website is https://getflex.com.Company H1B SponsorshipFlex has a track record of offering H1B sponsorships, with 1 in 2025, 1 in 2024. Please note that this does not guarantee sponsorship for this specific role.