Security Engineer - Network Edge Security

VulnU; California; Remote; USD 218,000 - 327,000; Full time

Benefits offered by this job

Remote work

Medical insurance

Flexible time off

Retirement savings plans

Job summary

Block, Inc. is seeking a Senior Network Edge Security Engineer to protect API traffic at the edge using WAFs, bot vendors, and CDN-native tools. You'll build scalable infrastructure and a near-real-time data pipeline to surface security insights and respond quickly to threats.

You will collaborate with multiple engineering and operations teams, contribute to ML labeling, and develop AI-powered defenses across Cloudflare/Fastly and AWS ecosystems.

Qualifications

• 5+ years of software or security engineering experience.

Responsibilities

• Respond to and mitigate threats at the network edge using WAF rules and bot vendors.
• Build and maintain infrastructure for inventory of network edge security posture.
• Develop near-real-time streaming analytics data pipeline and applications.
• Contribute to labeling and ML model development.
• Manage build, deploy, and production monitoring workflows.
• Evaluate integrations with vendor systems and in-house solutions.
• Develop AI-driven capabilities to classify and mitigate abusive traffic.

Skills

Java

Kotlin

TypeScript

Python

SQL

Spark

Cloudflare

Fastly

AWS

Snowflake

Databricks

Datadog

Education

Bachelor's degree in Computer Science

Tools

Snowflake

MySQL

DynamoDB

Databricks

Datadog

Terraform

Job description

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 careerThe RoleThe 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 WillRespond and mitigate emerging threats and attacks at our network edge by leveraging WAF rules, bot vendors, and other CDN-native technologiesHelp build out infrastructure that gives us better inventory of our network edge security postureBuild out and maintain a near-real time streaming analytics data pipeline and applicationContribute 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 appropriateEvaluate and build integrations with vendor systems that may be used in addition to in-house solutionsDevelop and implement AI-driven capabilities to automatically classify and mitigate abusive traffic patternsSignificant experience with bot/fraud identification and mitigation systems is a strong plusYou Have5+ years of software or security engineering experience developing scalable production software incorporating testing, evaluation, and monitoringBachelor's degree in Computer Science or equivalent practical experienceProficient in Java, Kotlin, Typescript, and PythonProficient in data analysis using SQL and SparkExperience implementing and maintaining applications in both a CDN (Cloudflare and Fastly) and Amazon Web Services (AWS) ecosystemsFamiliarity with Snowflake, Databricks, and Datadog are a strong plusTechnologies We Use and TeachJava/Kotlin, Javascript/Typescript, PythonCDN (Cloudflare and Fastly)Snowflake, MySQL, DynamoDB, DatabricksAWSKafkaDatadog, TerraformWe’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:$217,800 $326,800 USDZone B:$207,000 $310,400 USDZone C:$196,100 $294,100 USDZone D:$185,200 $277,800 USDApplication GuidelinesCandidates may submit up to 9 active applications within a 60-day period. Reapplications to the same role are accepted 90 days after a previous application has been reviewed.Use of AI in Our Hiring ProcessWe 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.Contact us here with hiring practice or data usage questions.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. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we’re helping build a financial system that is open to everyone.