Job Description

Job Title: Senior Software Engineer (Attack and User Emulation Team)
Location: Hybrid – San José, Costa Rica (2–3 days in office)
Type of Contract: Full-Time (EOR initially, transitioning to direct employment)
Salary Range: Market Rates + Transport Bonus + Medical & Dental (employee coverage; family coverage planned)
Language Requirements: Advanced English (Required)

We are seeking a skilled Senior Software Engineer with strong experience in backend development and cybersecurity software to join our growing Attack and User Emulation (AUE) team. You will play a key role in designing and building scalable microservices that simulate real-world cyberattacks and user behaviors. Your work will directly impact the realism, performance, and reliability of cutting-edge cyber range platforms.

Key Responsibilities

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  Design, develop, and maintain scalable, fault-tolerant microservices for cyber range simulation environments
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  Lead end-to-end development efforts, including architecture design, implementation, and deployment
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  Build and enhance event-driven systems and containerized services using modern backend frameworks
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  Collaborate with cross-functional teams (Product, UX) to translate requirements into robust technical solutions
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  Mentor junior engineers and promote best practices in coding, testing, and system design
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  Conduct code reviews to ensure high-quality, maintainable, and performant code
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  Implement monitoring, alerting, and security controls to ensure system reliability and compliance

Must-Have Qualifications

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  5+ years of experience in software engineering, with a focus on distributed systems and backend development
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  Strong proficiency in Kotlin and/or Java (required)
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  Proven experience building cybersecurity or security-related software (not security analysis or practitioner roles)
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  Hands-on experience with microservices architecture, APIs, and event-driven systems
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  Experience with containerization and orchestration tools (Docker, Kubernetes)
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  Solid understanding of Spring Boot and modern backend frameworks
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  Ability to clearly articulate technical decisions and walk through past projects with concrete examples

Preferred Qualifications

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  Experience with Python and/or Golang
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  Familiarity with VMware environments
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  Exposure to offensive and defensive cybersecurity concepts in a software development context
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  Experience working in high-performance or simulation-based platforms
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  Strong understanding of scalable system design, trade-offs, and performance optimization