Principal Software Engineer
About Us
Nebulock builds hunt-first, behavior-first security operations. Enterprise security teams use us to find attackers already inside their environment by spotting behavior that's abnormal for that organization, rather than by matching signatures of attacks someone has already seen. Attackers rotate tooling constantly and it costs them almost nothing; changing how they behave is much harder.
Series A, $34M total raised led by FirstMark, with Bain Capital Ventures, Decibel, Zetta, Step Function, and In-Q-Tel. Founding team out of CrowdStrike, Palo Alto Networks, and Arctic Wolf.
The platform is a closed loop:
A per-customer behavioral system of record that learns what normal looks like in a specific environment and gets more useful the longer it runs
Detections built from that context, re-baselining as environments shift, maintained by a detection engineering team rather than shipped and forgotten
Autonomous hunting agents that work from a hypothesis instead of an alert, and write the detection when they establish root cause
Detection engineering agents that take the context of threat hunts run to build, test, validate and deploy behavioral detections for Nebulock customers.
Position Overview
The Data Platform team is responsible for ingesting security telemetry data from our customers’ environments, transforming the data, and making it available to AI agents that continuously scan this data to look for malicious activities. We also tackle hard problems such as correlating entities across events from disparate sources and generating a queryable baseline view of activities that will allow agents to detect anomalies.
As aPrincipal Software Engineer on this team, you will lead cross-functional projects and drive architectural changes to meet strict latency and reliability requirements. You’ll co-own the data ingestion, transformation, and search layers that power agentic threat hunting workflows. We currently ingest terabytes of data per day and are growing fast. This role is ideal for engineers who have built large distributed systems from the ground up and scaled it to process billions of events/requests per day.
Expected Impact
Design, build, and maintain scalable data pipelines that ingest and process large volumes of security telemetry (TBs / day)
Own API and event stream integrations across a wide range of third-party data sources (EDR, IAM, Cloud, SaaS)
Partner with product stakeholders to build data solutions that will be consumed by both internal and external customers
Guide the future technical direction that allows rapid development of product capabilities and efficient scaling of backend systems
Use AI agents to build creative solutions to solve problems such as data mapping and entity correlation
Set and promote engineering standards and best practices, including observability, monitoring and automated testing
Be a mentor to junior engineers and help grow the engineering talent within the team
Qualifications
8+ years of experience building large-scale distributed systems supporting customer-facing products
Proficiency in Python, Java, Go, Rust, or similar
Hands-on experience designing large-scale event streaming systems such as Kafka or similar
Experience working on search or analytics products over large datasets
Strong systems thinking and understanding of performance, cost and complexity trade-offs
Experience with either AWS or GCP
Ability to adapt, iterate, and ship quickly
Hunger for growth and the desire to work in a low-ego environment
Nice to Haves
Experience building and scaling distributed systems from the ground up
DevOps or platform engineering experience
Cybersecurity experience
Startup experience
Compensation
We offer a competitive compensation package comprised of a base salary, equity and comprehensive benefits. The base salary for this role is $200,000 to $230,000. Compensation packages are determined based on a number of factors including but not limited to, role related experience, skillset, and geographic location.
Benefits
Health, dental, and vision coverage
Unlimited PTO
Remote working flexibility
Life Insurance
401k