Backend Engineer, Halcyon
Data Platform & APIs
$120-170k
+ Equity; bonus target of 10%
Cybersecurity tools to protect against ransomware
Open for applications
Cybersecurity tools to protect against ransomware
201-500 employees
Open for applications
$120-170k
+ Equity; bonus target of 10%
201-500 employees
Company mission
Halcyon's mission is to defeat ransomware.
Role
Who you are
- 5+ years of backend engineering experience, with recent experience in a jvm-based codebase
- Exposure to C# or interest in learning it as part of a migration path
- Strong understanding of APIs, messaging systems (Kafka), and modern data stores (Postgres, DynamoDB, OpenSearch)
- Experience building services in a cloud-native environment, preferably AWS
- Working knowledge of containers and Kubernetes
- Comfortable working in a remote-first, asynchronous team environment
Desirable
- Familiarity with functional programming patterns and idiomatic Scala
- Experience with Terraform, Helm, and GitHub Actions
- Familiarity with observability tools (Prometheus, Grafana, CloudWatch)
- Prior work in security products, data pipelines, or high-availability systems
- Python development experience, particularly with security analysis tools and malware detection frameworks (YARA, PE analysis, binary analysis)
- Familiarity with machine learning workflows, AutoML, and MLflow for model deployment and management
- Experience with binary analysis libraries (LIEF, ssdeep, TLSH) and security tooling integration
What the job involves
- At Halcyon, we’re building a world-class anti-ransomware platform grounded in innovation and resilience. As part of that vision, we’re looking for a mid-level Backend Engineer to join our cloud team. You’ll contribute to the development and evolution of our data platform and API services, working within a modern tech stack that blends Scala and C#
- You’ll join a team focused on building scalable, maintainable backend systems that serve both internal and customer-facing functions. Your primary focus will be on Scala services, with opportunities to shape our transition to C# where it makes sense. Prior experience with identity management systems—especially Keycloak—is highly valuable
- Contribute to feature development across our data platform and public API services, including ingestion, transformation, and enrichment of security data
- Collaborate with product and platform engineers to align on system design, architecture, and data flow
- Develop, test, deploy, and monitor Scala-based backend services that are reliable, secure, and performant
- Support our gradual migration of certain APIs from Scala to C#, ensuring consistency and continuity
- Design systems with identity management and authorization best practices in mind; hands-on experience with OIDC or SAML providers is a plus
- Maintain high standards for code quality, documentation, and operational reliability
- Participate in design discussions, code reviews, and incident response
- Support and enhance our Python-based security analysis platform, including malware analysis engines, automated threat detection, and machine learning model workflows
Our take
As cyber attacks become increasingly complex, especially in the mode of ransomware, companies such as Halcyon are becoming an ever more important weapon in the fight for cybersecurity. Though only formed in 2021, its founders have extensive experience as researchers at cybersecurity unicorn Cylance, amongst other notable companies in the sector.
Halcyon’s product stands out from similar - and abundant - offerings thanks to its melding of multi-proprietary advanced prevention engines and AI models designed specifically to seek out and destroy ransomware threats. It's the flexibility and reactivity of these two multi-tiered facets that have made Halcyon a trusted partner for companies on the Forbes Global 2000 list.
With significant funding behind it, Halcyon will ramp up the development of its platform's features and continue expanding its customer base.
Kirsty
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 4 rounds)
Nov 2024
$100m
SERIES C
Dec 2023
$40m
SERIES B
Total funding: $204m
Company benefits
- A Remote Native Global Team - As a remote first, completely distributed team, we recognize great talent can exist anywhere. We invite you to apply to a job you’re interested in and we'll work a plan to meet your needs.
- Health & Wellness - We offer comprehensive health benefits to meet you and your family’s needs, including 100% covered Medical, Dental and Vision insurance for you and all your dependents.
- Competitive Compensation Packages - We offer competitive compensation packages with equity, depending on position, along with a generously matched retirement plan, unlimited PTO, paid sick time and holidays
- Future Planning & Time Off - We offer paid time off to take care of yourself! Relax and recharge on us. We also include paid parental leave, short & long term disability insurance, life insurance and more
Company HQ
Congress Avenue Historic District, Austin, TX
Leadership
Jon Miller
(CEO & Co-Founder)Previously CEO and Founder at Boldend, Advisory Board member at Cylance, Vice President at Accuvant LABS, Managing Consultant at IBM.
Ryan Smith
(CTO & Co-Founder)Currently Owner at Hustle Labs. Previously Chief Research Officer at Boldend, Advisory Board Member at Cylance.
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