Security Engineer - Network Edge Security Bay Area, CA, US

Block, Inc.; United States; Remote; USD 190,000 - 310,000; Full time

Benefits offered by this job

Remote work

Medical insurance

Flexible time off

Retirement savings plans

Family planning support

Job summary

Block, Inc. seeks a Security Engineer for Network Edge Security in a remote-first environment based in the US. You will harden API security, build streaming analytics, and evolve ML models to classify threats at the edge across multiple brands. Strong coding in Java/Kotlin/Python and CDN/AWS experience are required.

You will collaborate with engineering and operations to monitor, deploy, and respond to threats, leveraging WAFs, CDN tools, and vendor integrations as needed.

Qualifications

• 5+ years of software or security engineering experience in production systems.
• Bachelor’s degree in Computer Science or equivalent practical experience.
• Proficiency in Java, Kotlin, TypeScript and Python; strong SQL and Spark skills.

Responsibilities

• Respond and mitigate threats at the network edge using WAF rules and CDN-native tech.
• Build a real-time streaming analytics pipeline and maintain monitoring.
• Develop ML labeling and model improvements for security posture.
• Integrate vendor systems with in-house solutions and manage deployments.
• Support edge security automation to classify and mitigate abusive traffic.

Skills

Security engineering

Java

Kotlin

Python

SQL

Spark

Education

Bachelor's degree in Computer Science or equivalent

Tools

Cloudflare

Fastly

AWS

Snowflake

Databricks

Datadog

Job description

Security Engineer - Network Edge Security

Remote Bay Area, CA, US

Posted Date: 10/15/26

Remote Bay Area, CA, US Req ID: R0007019 Posted Date: 10/15/26 Posted yesterday

Block is one company built from many blocks, all united by the same purpose: economic empowerment. We build technology that increases access and independence for sellers, individuals, and artists around the world. Working at Block means working on and across our brands—Square, Cash App, Afterpay, TIDAL, Spiral, and Proto— in roles that connect, enable, and push all of them forward faster.

We’re remote-first by design and operate with intelligence at the center of everything we do. At Block, you'll be challenged by some of the brightest, most creative minds in the industry and have the tools and autonomy to do the most meaningful work of your career

The Role

The Network Edge Security team builds the tools that provide important insights to our API Security posture and trustworthiness of traffic flowing into our systems. Our capabilities use machine learning, streaming analytics, and significant data analysis to provide insights into understanding our network edge risk exposure and the true sources of our request flows. The team’s primary focus is up-leveling our API security posture for downstream products and services. However, there is also a need at times to respond quickly to emerging threats to take action at the edge to provide immediate relief. The team is small, requiring nimbleness and flexibility to stay ahead of threat actors. You should have a strong passion for the problem space – needing to understand a significant range of knowledge around Content Distribution Networks (CDN), analytical tools, network protocols and behavior, as well as authentication and authorization systems. You will work closely with many teams across the organization both engineering and operational to gain the insights required to understand the problem space as well as monitor the effectiveness of our solutions.

You Will

• Respond and mitigate emerging threats and attacks at our network edge by leveraging WAF rules, bot vendors, and other CDN-native technologies
• Help build out infrastructure that gives us better inventory of our network edge security posture
• Build out and maintain a near-real time streaming analytics data pipeline and application
• Contribute to the evolution of our labeling and ML model development.
• Help manage and maintain our systems across build, deploy, and production monitoring,
• Be flexible with respect to computer languages as we use Java, Kotlin, Python, TypeScript, PySpark and others as needed or appropriate
• Evaluate and build integrations with vendor systems that may be used in addition to in-house solutions
• Develop and implement AI-driven capabilities to automatically classify and mitigate abusive traffic patterns
• Significant experience with bot/fraud identification and mitigation systems is a strong plus

You Have

• 5+ years of software or security engineering experience developing scalable production software incorporating testing, evaluation, and monitoring
• Bachelor's degree in Computer Science or equivalent practical experience
• Proficient in Java, Kotlin, Typescript, and Python
• Proficient in data analysis using SQL and Spark
• Experience implementing and maintaining applications in both a CDN (Cloudflare and Fastly) and Amazon Web Services (AWS) ecosystems
• Familiarity with Snowflake, Databricks, and Datadog are a strong plus

Technologies We Use and Teach

• CDN (Cloudflare and Fastly)
• Snowflake, MySQL, DynamoDB, Databricks
• AWS
• Kafka

We’re working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we’re doing to build a workplace that is fair and square? Check out our I+D page .

While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.

Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

To find a location’s zone designation, please refer to this resource . If a location of interest is not listed, please speak with a recruiter for additional information.

Zone A:

$207,000 — $310,400 USD

Zone D:

$185,200 — $277,800 USD

Use of AI in Our Hiring Process

We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws.

Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.

Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Squaremakes commerce and financial services accessible to sellers.Cash Appis the easy way to spend, send, and store money.Afterpayis transforming the way customers manage their spending over time.TIDALis a music platform that empowers artists to thrive as entrepreneurs.Bitkeyis a simple self-custody wallet built for bitcoin.Protois a suite of bitcoin mining products and services. Together, we’re helping build a financial system that is open to everyone.