Senior Software Engineer, Fullstack

FlexRemote - New York, New York, United States; Remote; San Francisco, California, United States$197k – $213k+ Equity3w ago

Remote Senior NA Cloud Computing Fintech Payments Software Senior Software Engineer Senior Full Stack Developer Java CDK TypeScript Spring JUnit

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Requirements

5+ years of professional software development experience.
5+ years
3+ years of hands-on experience with Java.
3+ years
3+ years of experience with React or React Native.
3+ years
3+ years of experience with TypeScript.
3+ years
Having experience building high-quality mobile and web UIs to specifications is a must to have.
mobile and web UIs
must to have
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.
Have the experience to build and improve user onboarding funnel and design the comprehensive experiment to drive metric improvements.
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.
Flex takes a market-based approach to pay, and compensation may vary depending on your primary work location. Work locations are categorized into one of three tiers based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be commensurate with their experience, qualifications, and Flex’s internal leveling guidelines and benchmarks.
Tier A (NYC/SF/Seattle): $172,000—$210,000 USD
Tier A (NYC/SF/Seattle):
Tier B: $154,000—$190,000 USD
Tier B:
Tier C: $146,000—$180,000 USD
Tier C:
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 & perks. For full-time U.S based positions we offer:
Competitive medical, dental, and vision available from Day 1
401(k) plan with company match (our company match kicks off at the beginning of 2026)
Unlimited paid time off + 13 company paid holidays
Flex Cares Program
Free Flex subscription
For full time non-US employees, we offer

Responsibilities

Focus on creating exceptional user and partner experiences that drive engagement and retention.
Partner closely with product managers, designers, and data scientists, data analysts to identify and solve critical user onboarding challenges.
Design, develop, test, and deploy robust APIs, services and data pipelines that enhance user onboarding and overall platform experience.
Implement changes through an agile methodology, prioritizing rapid iteration and continuous improvement.
Utilize data and analytics to measure the impact of your work and identify opportunities for optimization.

Benefits

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
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.
Competitive medical, dental, and vision available from Day 1
401(k) plan with company match (our company match kicks off at the beginning of 2026)
Unlimited paid time off + 13 company paid holidays
Flex Cares Program
Free Flex subscription
For full time non-US employees, we offer
Competitive compensation + company equity
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