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About the Role

Flex is seeking a Staff Software Engineer to join its MarTech team. This role will lead the implementation of platforms, services, and customer-facing web experiences that support customer acquisition and retention. The MarTech team acts as a crucial link between ad platforms, website, messaging systems, analytics, and product data, transforming marketing spend into a measurable growth engine and enabling marketing teams to launch and personalize campaigns independently.

Responsibilities

Build and own full-stack marketing services and web experiences that drive customer acquisition and retention.
Design and develop 24/7 high-scale APIs, event-driven services, and data pipelines.
Build measurement into all deliverables and integrate third-party ad, analytics, and messaging platforms.
Collaborate with marketing, data, product, design, and engineering peers to launch features and experiments.

Requirements

8+ years of professional software development experience.
6+ years of hands-on experience with Java.
3+ years of experience with TypeScript.
3+ years of experience with React (or React Native), including modern architectures and tooling.
Excellent written and verbal communication skills, with experience in cross-functional collaboration.
Proven experience building high-quality, high-performance web and mobile UIs to spec.
Proficient in Java frameworks and tools including Spring, Gradle, JUnit, and JVM tuning.
Experience with service-oriented architecture, REST APIs, webhooks, message queues, event-driven design, and scalable architectures.
Experience with AWS (EKS, Aurora RDS, Elasticache, DynamoDB) and containerization tools.
Comfort integrating and debugging third-party APIs and SDKs.

Skills

Java
Spring Boot
TypeScript
React
React Native
AWS
Service-oriented architecture
REST APIs
Message queues
Event-driven design
Scalable architectures
Containerization
Spring
Gradle
JUnit
JVM
Braze
Singular/AppsFlyer/Branch
Google Tag Manager
Amplitude
LaunchDarkly
Meta/Google/TikTok/Apple ad and conversion APIs
Attribution
Identity resolution
Conversion tracking
A/B testing
Experimentation frameworks
Web performance optimization
Big data platforms
Snowflake
CI/CD systems
GitHub Actions
Git
Automation
Observability tools
DataDog
Infrastructure as Code
CDK
Terraform

Location

NYC
US
Australia
Canada
South America

Work Type

Hybrid

Experience Level

Staff

Salary/Compensations

Tier 1 (NYC/Bay Area, Los Angeles, Seattle): $200,000—$250,000 USD
Tier 2 (Austin, Washington D.C. Philadelphia, San Diego, Chicago, Atlanta): $180,000—$225,000 USD
Tier 3 (Salt Lake City, all other USA cities): $170,000—$212,000 USD

Benefits

Competitive medical, dental, and vision
Company equity
401(k) plan with company match
Unlimited paid time off + 13 company paid holidays
Parental leave
Free Flex subscription
Competitive compensation + company equity (non-US)
Unlimited PTO (non-US)

About the Company

Flex is a growth-stage, NYC headquartered FinTech company creating the best rent payment experience.
Flex enables users to pay rent throughout the month on a schedule that better fits their finances and budget.
Our mission is to empower renters with flexibility over their most significant recurring expense.
We have unprecedented investor support and an enthusiastic user base.
We are growing quickly, but deliberately, with a focus on building an inclusive culture.
Our dynamic team has incredible perspectives to share.

Equal Opportunity

We take great pride in being an equal opportunity workplace.