Jobs in the United States

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Added 4 mins ago
Federal Principal Product Support Engineer, (Clearance Required - Secret), Oklahoma City, OK, Dallas or Houston, TX or Montgomery, AL
HPE
All, OK
Lead in-depth, hands-on diagnostics directly on the full infrastructure stack using log analysis, and service-level debugging:
Added 1 hour ago
Digital Engineer
MANTECH
Remote, United States
Lead full-stack software development efforts to create scalable, custom applications, microservices, and data pipelines supporting the Space Systems Command (SSC) and National Security…
Added 1 hour ago
Junior AI/ML Engineer
Node.Digital
Remote, United States
…against established baselines, and escalate findings to the AI/ML Lead Engineer and Fraud AI/ML…
Added 1 hour ago
Principal Backend / Fullstack Engineer (E-commerce & Platform Integrations)
Noble Panacea
Remote, United States
We are seeking a Principal Backend (or Full-Stack) Engineer to lead the architecture, development, and evolution of the backend and API platforms that power our ecommerce, loyalty, and…
Added 2 hours ago
Federal Principal Product Support Engineer, (Clearance Required - Secret), Oklahoma City, OK, Dallas or Houston, TX or Montgomery, AL
Hewlett Packard Enterprise
All, OK · All, TX
Lead in-depth, hands-on diagnostics directly on the full infrastructure stack using log analysis, and service-level debugging:
Added 3 hours ago
TT
Forward Deployed Engineer
True Talent Solutions Partners
New York, NY
- $170,000 to $220,000 USD / year
On-site in New York, New York, five days per week, with occasional client-site travel.
Added 4 hours ago
Solutions Engineer
Crogl
Remote, United States
- Working knowledge of at least one scripting or programming language (Python, TypeScript, or Go); you don't need to be a full-stack engineer, but you should be able to roll up your sleeves
Added 4 hours ago
Sr. Software Engineer, Pretraining Data
SpaceXAI
Palo Alto, CA
SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models,…
Added 5 hours ago
Physical AI Senior Engineer
Toyota
Georgetown, KY
Having a full-stack mindset while working in team environments building complete solutions, not just independent AI algorithms, demonstrations, and experiments.
Added 5 hours ago
Sr. Software Engineer I
Axon
WA
As a Senior Software Engineer I on VRCS, you will lead the technical execution of projects that help officers and their trainers get more out of every training session. Most of your time…
Added 5 hours ago
Engineer II
USA-Medtronic MiniMed, Inc 1017
Northridge, CA
Must Have: Minimum Requirements
Added 5 hours ago
Director, Product Management (Media)
Cars.com LLC
Remote, United States
…retail industry. As a product org leader, you will oversee the full lifecycle of product development for a suite of strategically important products. You will deliver industry leading…
Added 6 hours ago
Enterprise Data Cybersecurity Engineer, Lead
Booz Allen Hamilton_United States
McLean, VA
Enterprise Data Cybersecurity Engineer, LeadThe Opportunity:
Added 6 hours ago
Staff Software Engineer, Fraud & Payment Risk Platform
Flex
NY
Flex is looking for a Staff Software Engineer to build and scale our Fraud and Payment Risk Platform. You will lead the architecture and hands-on development of backend services and shared…
Added 6 hours ago
Full Stack Software Engineer
Ever.green
Remote, United States
This role is an excellent opportunity for someone with full stack software engineering experience who is passionate about sustainability and clean energy, and wants to make a huge impact on…
Added 6 hours ago
Sr.Principal Engineer-Full Stack
TCC Toyota Motor Credit Corporation Company
Plano, TX
Our team is seeking a highly motivated person to fill an opening as a Sr.Principal Engineer-Full Stack to help our growing needs.
Added 6 hours ago
Senior Staff Forward Deployed Engineer - Flow
ServiceNow
Remote, United States
We are hiring a Senior Staff Forward Deployed Solutions Engineer to be the most senior technical authority for Flow customers, guiding strategic and enterprise accounts from first demo and…
Added 6 hours ago
Software Engineer
Equifax, Inc
GA
Mentor other engineers to lead in defining challenging technical culture and assist in building a fast-growing team. **Multiple positions available.**
Added 6 hours ago
T
End User Computing Manager
TEKsystems
New York, NY
- $200,000 to $225,000 USD / year
Fulltime position - hybrid in midtown NYCOur financial client is looking for a strong, practical manager to lead the EUS technical team responsible for Citrix, desktop, virtual compute, and…
Added 6 hours ago
T
Remote IP Network Engineer II (SD-WAN Palo Alto & Firewall Engineering)
TEKsystems
Atlanta, GA
- $50 to $61 USD / hour
…across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive…
Added 6 hours ago
E
Lead Software Engineer
EverCommerce
Remote, United States
- $203,798 USD / year
Must have U.S
Added 6 hours ago
Lead Product Software Engineer
Wolters Kluwer DXG U.S., Inc.
Coppell, TX
We are seeking a hands-on Lead Product Software Engineer to lead a team of engineers while designing and delivering enterprise software products. This player-coach role combines full-stack…
Added 7 hours ago
Staff Software Engineer
Murmuration
Remote, United States
…we offer services that strengthen our partners' capacity to lead change in their…
Added 7 hours ago
Staff Data Platform Engineer
Murmuration
Remote, United States
As a Staff Data Platform Engineer, you will work across all engineering teams and report to one of our Directors of Software Engineering. You will define guidelines and processes for data…
Added 7 hours ago
M
Senior Software Engineer
Murmuration
Remote, United States
- $190,576 USD / year
The Senior Software Engineer is a full-time, salaried position with a comprehensive benefits package (detail below), open to candidates anywhere in the United States.

Flex

Staff Software Engineer, Fraud & Payment Risk Platform

NY, United States

Apply on job-boards.greenhouse.io About employer

Applications open in a new tab.

Job details

Posting language: English
Posted: Nov 10, 2026

Original job description

Flex is a growth-stage, NYC headquartered FinTech company that is building the payment layer for life's financial obligations, giving households one place to see, split, and pay their bills around how they live and get paid. By offering greater choice over how and when payments are made and allowing eligible on time payments to help build a positive credit history, Flex puts households back in control of their cash flow.

That work brings together people with different perspectives who challenge the status quo and take ownership of solving difficult problems. For you, that means doing the best work of your career next to people who make you better, and together bringing ideas to life that make a real impact for the people we serve.

About the role

Flex is looking for a Staff Software Engineer to build and scale our Fraud and Payment Risk Platform. You will lead the architecture and hands-on development of backend services and shared infrastructure for fraud prevention and payment risk decisioning.

The platform combines real-time, near-real-time, and offline/batch-computed risk features with business rules, machine learning model outputs, and experimentation. You will make these capabilities reliable, scalable, and observable, enabling teams to develop, validate, and launch risk strategies faster and more safely.

This is a hands-on backend and platform role with technical ownership from architecture through production. You will collaborate with product, risk policy, data science, and engineering teams to turn risk strategies into reusable platform capabilities. Your scope includes feature ingestion and integration, user acceptance testing (UAT), experimentation, and engineering infrastructure supporting the full machine learning (ML) lifecycle - from development and validation workflows through deployment, serving, and production monitoring - in partnership with data scientists who own model research and training.

What you’ll do

Lead backend architecture and development for the Fraud and Payment Risk Platform, including decisioning services, APIs, and shared infrastructure for evolving business needs.
Design for scalability, performance, and reliability, balancing latency, throughput, availability, data consistency, and cost.
Build capabilities for feature ingestion, integration, and serving, supporting real-time, near-real-time, and offline/batch-computed features with attention to freshness, correctness, and availability.
Develop infrastructure for rules and experimentation, enabling teams to configure and version risk strategies, perform user acceptance testing (UAT), evaluate changes, and safely roll them out.
Own engineering infrastructure across the ML lifecycle, supporting development and validation workflows, deployment, inference, versioning, safe rollouts, rollback, and integration of model outputs into risk decisions.
Own monitoring and alerting across the platform, covering service health, feature freshness and quality, rule and experiment execution, and model inference. Partner with risk policy and data science teams to monitor model behavior and decision outcomes.
Improve platform extensibility and usability, so teams can add features, rules, models, and experiments without duplicating infrastructure or tightly coupling systems.
Drive complex initiatives from design through production, including technical design proposals, hands-on implementation, performance testing, migration planning, and cross-team coordination.
Raise the engineering bar through design and code reviews, mentorship, and improvements to testing, documentation, deployment safety, and operations.

Our backend stack includes Java, Spring Boot, Python, and AWS.

Qualifications

Minimum qualifications

6+ years of professional software engineering experience, including substantial experience building and operating backend systems in production.
5+ years of hands-on Java experience, including building services with Spring Boot.
Experience leading the architecture and delivery of complex distributed systems or shared backend platforms.
Strong understanding of API design, service integration, data modeling, caching, and distributed-system failure modes.
Experience diagnosing performance bottlenecks and improving scalability and reliability through measurement, testing, and production troubleshooting.
Experience with cloud infrastructure, containerized deployments, and relational and NoSQL data stores.
Experience establishing observability, monitoring, and alerting for production systems.
Ability to lead technical decisions across teams, communicate architectural trade-offs clearly, and mentor other engineers.

Preferred qualifications

Experience building risk platforms, decision engines, or fraud/payment risk systems is a plus, though risk-domain experience is not required
Experience with feature platforms, configurable rules engines, experimentation infrastructure, or production model-serving systems.
Experience building shared platforms that other engineering or risk teams adopt and operate independently.
Familiarity with AWS services such as EKS, Aurora, ElastiCache, and DynamoDB.
Experience with infrastructure as code and CI/CD automation using tools such as Terraform, CDK, and GitHub Actions.
Familiarity with tools such as Datadog for observability and Snowflake for analytics.

Compensation

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 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 - $212,500 USD

Life at Flex

Building a successful company takes a diverse team of intelligent, curious, determined, empathetic, and self-aware people. Our headquarters is in New York City, with employees across the US, Australia, Canada, and South America. We’re growing quickly and deliberately, with a focus on building an inclusive culture. We value the perspectives our people bring and take pride in being an equal opportunity workplace.

Offices

Roles posted in New York, San Francisco, and Salt Lake City are hybrid positions with on-site expectations of 2-3 days per week in our local offices. For candidates outside of these areas, you may be eligible for our relocation assistance program.

Benefits

View our benefits and more at getflex.com/careers.

Apply on job-boards.greenhouse.io About employer

More about this job

Skills

Machine learning
ML
Research
Documentation
Oracle Java
Spring Boot
Python
AWS
API development
Data modelling
Troubleshooting
NoSQL
Amazon DynamoDB
Infrastructure as code
CI/CD
IBM Terraform
GitHub
Datadog
Snowflake

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Work requirements

Jobs in the United States