Jobs in the United States

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Software Development Engineer, Customer Experience and Business Trends
Amazon.com Services LLC
Seattle, WA
Amazon's Customer Experience and Business Trends (CXBT) organization is seeking a Software Development Engineer (SDE) to shape the future of Amazon Web Services (AWS) customer experience by…
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Controls Design Engineer, Controls Design Engineering
Amazon Data Services, Inc.
Seattle, WA
…global data center design standards with a focus on controls, automation, and electrical power monitoring systems. As the primary owner of BMS/EPMS specifications, Controls Points Lists…
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Software Development Engineer, Amazon Dedicated Cloud, Early Career - 2027, Amazon Dedicated Cloud (ADC)
Amazon.com Services LLC
Jessup, MD · Seattle, WA · Arlington, VA · Denver, CO · Herndon, VA
At Amazon, our tech isn't just a tool, it's your playground. Our engineers work on scalable systems, cloud services, and customer-facing products that operate at global scale. This is an…
Added 4 mins ago
Sr. Manufacturing Engineer
Unigen
Newark, CA
Position Summary: The Senior Manufacturing Engineer leads the design, implementation, and continuous improvement of manufacturing processes and systems to optimize production efficiency,…
Added 5 mins ago
Staff Software Engineer, AI-Native Engineering - Flow
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 5 mins ago
Staff Software Engineer, AI-Native Engineering - Flow
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 5 mins ago
Senior Staff Software Engineer, AI-Native Engineering - Flow
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 5 mins ago
Senior Staff Software Engineer, AI-Native Engineering - Flow
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 5 mins ago
Senior Staff Software Engineer, AI-Native Engineering - Flow
ServiceNow
Remote, United States
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 5 mins ago
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IT Network & Security Engineer
Astiva Health
Orange, CA
- $85,000 to $130,000 USD / year
…coordinated care to its members. The IT Network & Security Engineer designs, maintains, and secures the enterprise network infrastructure and cloud environments connecting our offices,…
Added 6 mins ago
GRC Staff Engineer
Fivetran
Oakland, CA
…moves, through every transformation, to the context teams and AI systems rely on. Fivetran helps organizations automate data movement across the systems, clouds, engines, and tools they…
Added 6 mins ago
GRC Staff Engineer
Fivetran
Denver, CO · Oakland, CA
…moves, through every transformation, to the context teams and AI systems rely on. Fivetran helps organizations automate data movement across the systems, clouds, engines, and tools they…
Added 7 mins ago
AWS Security Engineer - Senior Associate
PWC US
TX-Dallas, TX · FL-Miami, FL · FL-Tampa, FL · GA-Atlanta, GA · CO-Denver, CO · IL-Chicago, IL · TN-Nashville, TN · OH-Cleveland, OH · MA-Boston, MA · PA-Philadelphia, PA · TX-Houston, TX
What You Must Have
Added 9 mins ago
Product Engineer
AFL Telecommunications
Duncan, SC
The Product Engineer is part of a high-performing team that designs and develops energy accessories and advanced manufacturing technologies. This engineer is responsible for accessory…
Added 12 mins ago
Senior Distribution Engineer 1 - Grid
Sargent & Lundy
Cary, NC
Develop your career via peer-learning by way of S&L’s systems of process and associated “Communities of Practice.”
Added 12 mins ago
Lead Information Security Engineer - Cyber Defense
Fifth Third Bank, National Association
United States
The Lead Information Security Engineer (ISE) will help lead our software, platform, and site reliability engineering work with the detection, response, and threat intel analysts to build,…
Added 12 mins ago
Director, Software Engineering
Fifth Third Bank, National Association
Cincinnati, OH
…data, and integration components. Promote containerization, automation, scalability, resilience, security, and efficient use of cloud and enterprise…
Added 14 mins ago
Experienced Infra Technology Project Controls Engineer
Samsung Austin Semiconductor, LLC.
1530 FM 973 Taylor, TX
Samsung Austin Semiconductor is seeking an Infrastructure Project Controls Engineer to join the Infra Integration team. This is a high-visibility role that blends technical project…
Added 16 mins ago
Systems Engineer, Lead
Booz Allen Hamilton_United States
Fayetteville, NC
You will provide hands-on technical leadership within the systems engineering team, reviewing designs, developing team capabilities, and communicating progress, recommendations, and risks…
Added 16 mins ago
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Lead Integration and Automation Engineer (Multiple Openings)
WA
- $119,700 to $125,700 USD / year
The Lead Integration and Automation Engineer will be required to maintain and deploy a detailed understanding of electric power system engineering integration, automation, and industrial…
Added 17 mins ago
Wi-Fi Dev Test Engineer
InnoPhase IoT
San Jose, CA
We are seeking a Wi-Fi Test Engineer to validate the performance, stability, and interoperability of our Wi-Fi IoT chipsets. This role focuses on hands-on chipset testing, automated test…
Added 18 mins ago
Senior Systems Engineer
Freestone Capital Management
Seattle, WA
We are seeking a Senior Systems Engineer to own the infrastructure that keeps our multi-office firm of over 130 people secure, connected, and productive. This person will be the technical…
Added 18 mins 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 20 mins ago
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Senior Platform Software Engineer
Oracle
Nashville, TN
- $87,800 to $209,500 USD / year
Software Engineer - OCI User Experience Engineering Platform
Added 20 mins ago
O
Platform Software Engineer 2
Oracle
Nashville, TN
- $81,000 to $166,100 USD / year
Assists in driving improvements, ensures automation, testing, and debugging of systems to ensure service/product availability, health, support, and reliability.

Flex

Staff Software Engineer, Fraud & Payment Risk Platform

NY, United States

Apply on job-boards.greenhouse.io About employer

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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