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Backend Engineer

Robert Half · Senior · Remote · USD 0k - USD 0k

About Robert Half

Global cybersecurity leader specializing in Endpoint Detection & Response (EDR) solutions is expanding its Tokyo engineering team. The company protects enterprise customers worldwide by analyzing massive volumes of threat data from millions of endpoints in real-time.

Key Responsibilities:

Join the core engineering team building a completely next-generation EDR platform that has secured board-level funding and is moving into production phase
Design and implement backend services in Rust that process data from 6 million sensors streaming 1,000 messages per minute with sub-second response times
Build data ingestion pipelines and microservices that maintain reliability under extreme throughput while optimizing cloud infrastructure costs
Architect scalable distributed systems using containerization, cloud-native technologies and streaming data platforms

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Develop APIs and integrations connecting security tools across enterprise IT environments

Collaborate with an international engineering team (English-speaking) to implement AI-driven threat detection capabilities

Work on genuinely complex technical challenges where system reliability isn't optional. It's mission-critical!

Requirements:

Production experience in Rust required (or exceptionally strong C++/Go/Java with immediate willingness to transition to Rust)
Proven track record building high-scale distributed systems handling millions of users or data points, not just thousands
Deep understanding of system reliability trade-offs: performance versus cost, speed versus fault tolerance
Hands-on experience with cloud platforms (AWS/GCP/Azure), containerization, and microservice architecture patterns
Solid foundation working with both SQL and NoSQL databases; streaming data systems experience is a bonus
Currently based in Japan or hold valid work authorization to work in Tokyo
English language proficiency for international team collaboration

Welcome Experience:

Background in cybersecurity, SIEM systems, or observability platforms
Experience with Kafka, Flink, Redpanda, or other data streaming technologies
Familiarity with ELK stack, time-series databases, or real-time analytics frameworks
Previous work optimizing cloud infrastructure costs at scale

Key Highlights of the Role:

Join at the perfect timing as team has grown to 15+ engineers and is establishing technical leadership layers, creating fast-track paths to Team Lead positions
Work on greenfield architecture where your technical decisions will shape the product for years to come
Solve genuinely hard problems: maintain performance while processing petabyte-scale threat data across distributed global infrastructure
Join a truly international team where English is the primary language and remote collaboration is built into the workflow
Modern tech stack from day one-no legacy monoliths, just cloud-native microservices and streaming pipelines
Competitive compensation package reflecting the urgency and strategic importance of these hires (budget available up to ¥15M for exceptional candidates)
Located in Otemachi, Tokyo with convenient access to multiple train and subway lines

Apply Confidentially

Send your resume with "Rust Engineer - Cybereason" in the subject line. All applications and conversations will be handled with complete discretion. Even if you don't meet every requirement but have strong systems-thinking and Rust capabilities, we encourage you to apply.