Find your dream job faster with JobLogr
AI-powered job search, resume help, and more.
Try for Free
FL

Flex

via Greenhouse

Apply Now
All our jobs are verified from trusted employers and sources. We connect to legitimate platforms only.

Senior Software Engineer, Fullstack

Anywhere
full-time
Posted 10/8/2025
Direct Apply
Key Skills:
Java
React
TypeScript
Mobile Development
Web Development
API Development
Service-Oriented Architecture
AWS
CI/CD
Observability
Monitoring
Infrastructure as Code
Mentoring
Cross-Functional Collaboration
Agile Development
Fault-Tolerant Systems

Compensation

Salary Range

$177K - 213K a year

Responsibilities

The Software Engineer will implement backend and frontend systems that support business features. They will design, develop, test, and scale systems to enhance user and partner experiences.

Requirements

Candidates must have a minimum of 6 years of professional software development experience, including 4 years with Java and 3 years with React or React Native. Experience with building high-quality mobile and web UIs and working with technical and non-technical stakeholders is essential.

Full Description

Flex is a growth-stage, NYC headquartered FinTech company that is creating the best rent payment experience. It’s hard to believe that it’s 2025 and paying rent on time is expensive, inflexible, and difficult. We’re here to change that! Flex enables our users to pay rent throughout the month on a schedule that better fits their finances and budget. Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense. After deliberately keeping a stealth profile as we built up unprecedented investor support and an enthusiastic user base, we are looking for motivated individuals to help us keep our mission growing. Will you be a part of the team? About The Job Flex is looking for a Software Engineer (Fullstack) who will be responsible for implementing the various backend and frontend systems that support all business features. In this role, you will be part of the product engineering team, responsible for the services and integrations that power our products, such as Payment, Billing, Identity, partner integration, etc. You’ll be designing, developing, testing, and scaling systems needed to deliver great user and partner experiences. You’ll work closely with your product, design and engineering peers to solve our users' most pressing problems around rent payment. You’ll roll out changes to our customers in an agile manner with a delivery cadence that favors small, frequent iterations. The ideal candidate will be comfortable leading scoping, design and implementation for APIs they build and can drive their production rollouts to completion with minimum oversight. A minimum of 4 +years of experience with Java and 3+ with React/Typescript is required for this position. Qualifications Minimum Qualifications 6+ years of professional software development experience. 4+ years of hands-on experience with Java. 3+ years of experience with React or React Native. 3+ years of experience with TypeScript. Having experience building high-quality mobile and web UIs to specifications is a must to have. Ability to work on a globally-distributed team with a high degree of ownership Experience working with technical and non-technical stakeholders, successfully aligning and setting expectations on scope and delivery Ability to grow in a fast-paced and dynamic environment that will challenge you to always bring your best Experience building robust, fault-tolerant systems with multiple external dependencies Proficient 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 architectures. Experience with architectures and tools in React Native and React ecosystems (Hooks, Components, Context, Redux). Experience with AWS (EKS, Aurora RDS, Elasticache, DynamoDB) and containerization tools. Preferred Qualifications Proficient in CI/CD systems (preferably GitHub Actions), git, and automation. Skilled in observability and monitoring tools, such as DataDog, to ensure high availability. Experienced with big data platforms and tooling, including Snowflake. Proficient in Infrastructure as Code, using tools like CDK and Terraform. Skilled at elevating team standards through best practices, and mentoring junior engineers. Excellent written and verbal communicator, with experience in cross-functional collaboration. The salary compensation range for this role will be commensurate with the candidate's experience and Flex's internal leveling guidelines and benchmarks. For working locations in NY/NJ/CA, the base salary pay range will be $197,000-$213,000 For all other states, the base salary pay range will be $177,000-$192,000 Life at Flex: We understand that it takes a diverse team of highly intelligent, curious, determined, empathetic, and self aware people to grow a successful company. Our HQ is located in New York City, but we have employees located throughout the US, Australia, Canada and South America. We are growing quickly, but deliberately, with a focus on building an inclusive culture. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity workplace. We offer many employee benefits. For full time, U.S. based employees we offer: Competitive pay 100% company-paid medical, dental, and vision 401(k) + company equity Unlimited paid time off + 13 company paid holidays Parental leave Flex Cares Program Free Flex subscription For full time non-US employees, we offer Competitive Pay Company Equity Unlimited PTO

This job posting was last updated on 10/9/2025

Ready to have AI work for you in your job search?

Sign-up for free and start using JobLogr today!

Get Started »
JobLogr badgeTinyLaunch BadgeJobLogr - AI Job Search Tools to Land Your Next Job Faster than Ever | Product Hunt