Security Engineer - Network Edge Security

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, youll 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 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. However, there is also a need at times to respond quickly to emerging threats to take action at the edge to provide immediate relief. 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. 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
5+ years of software or security engineering experience developing scalable production software incorporating testing, evaluation, and monitoring
~ Bachelors 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

Java/Kotlin, Javascript/Typescript, Python
Snowflake, MySQL, DynamoDB, Databricks
AWS
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. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances.
Application Guidelines
Candidates 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 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.
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.

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.

Together, we’re helping build a financial system that is open to everyone.
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