Senior Backend Cloud Engineer (Rust/Scala) – Security Data

Halcyon; United States; Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

Healthcare

401k

Disability insurance

FSA

Flexible PTO

Parental leave

Equity

Job summary

Halcyon is seeking a Senior Backend Engineer for our cloud team. You will lead the development of the data platform and API services, focusing on Rust and Scala, with Python support for security analysis workflows.

Join a remote-first, distributed team building an adaptive ransomware prevention platform. Responsibilities include designing scalable systems, migrating APIs to Rust, and upholding code quality and reliability across production services.

Qualifications

• 5+ years backend engineering experience with JVM stack.
• Track record designing and owning distributed systems.
• Experience with Rust or guiding a Rust migration.
• Strong APIs, Kafka, and data stores (PostgreSQL, DynamoDB, OpenSearch).
• Experience building cloud-native services, preferably AWS.
• Kubernetes and containers knowledge.
• Comfortable in a remote-first, asynchronous team.

Responsibilities

• Lead design and delivery of data platform features and public API services.
• Drive system design and data flow decisions with product and platform teams.
• Build and own Scala-based backend services in production for reliability and security.
• Migrate APIs from Scala to Rust while maintaining continuity.
• Set code quality, docs, and operational standards.
• Lead design reviews, code reviews and participate in on-call incidents.
• Support Python-based security analysis platform and ML workflows.

Skills

Backend engineering

JVM stack

Distributed systems

Rust language

APIs

Kafka messaging

AWS cloud

Kubernetes

Remote teamwork

Scala familiarity

Databricks

Terraform/Helm

Observability tools

Python for security tools

ML workflows (MLflow)

Binary analysis tooling

Tools

PostgreSQL

DynamoDB

OpenSearch

AWS tooling

Job description

Halcyon is seeking a Senior Backend Engineer for our cloud team. You will lead the development of the data platform and API services, focusing on Rust and Scala, with Python support for security analysis workflows.

Join a remote-first, distributed team building an adaptive ransomware prevention platform. Responsibilities include designing scalable systems, migrating APIs to Rust, and upholding code quality and reliability across production services.