Senior Full Stack Engineer

🕒 August 31

🇨🇷 Costa Rica – Remote

💵 ₡1.5M - ₡2.5M / month

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 2%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

Apply Now

Find Similar Remote Jobs

Set Up Email Alert For New Jobs

📊 Check your resume score for this job

Improve your chances of getting an interview by checking your resume score before you apply.

Upload Resume

SimSpace

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2015

💼 Consulting

🎖️ Defense

🔒 Cybersecurity

🔥 Funding within the last year

💰 $39M Venture Round - SimSpace on 2025-10

Consulting • Defense • Cybersecurity

SimSpace is a cybersecurity company that provides a realistic, intelligent cyber range platform for training, testing, and validating security teams, tools, and AI agents. Its platform enables live-fire exercises, threat emulation (full kill-chain and atomic), validation of controls and agentic workflows, and disaster recovery and compliance testing; it is used by enterprises and government customers to build cyber readiness and resilience. Founded by experts from U. S. Cyber Command and MIT Lincoln Laboratory, SimSpace focuses on upskilling individuals, strengthening teams, and evaluating AI-driven defenses in realistic, production-like simulations.

📋 Description

• Build the web-based operator experience for SimSpace’s internet simulation platform across multiple ranges and environments • Design and build frontend workflows using React and TypeScript • Create workflows for configuring simulated services, registering personas, managing topology, provisioning applications, delivering scenario content, and querying platform state • Build reusable frontend architecture, components, and design patterns • Integrate the frontend with the control-plane API, including authentication, authorization, validation, error handling, asynchronous operations, and real-time status updates • Translate complex platform operations into intuitive, observable user experiences • Partner with the backend engineer on API design and contracts • Contribute to backend services and integration layers, including supporting endpoints and evolving data models • Develop views for platform health, range connectivity, service lifecycle, operation history, and partial-failure recovery • Implement state-management and data-fetching patterns for a multi-tenant platform with asynchronous and event-driven backend behavior • Build automated component, integration, and end-to-end tests • Improve frontend performance, accessibility, security, and maintainability • Collaborate with product, design, backend, network simulation, and SRE partners • Help establish frontend standards, code-review practices, observability, release processes, and documentation • SimSpace serves as an AI Proving Ground, helping governments, militaries, enterprises, and research institutions train, test, and improve cyber defenses

🎯 Requirements

• Strong experience building production web applications with React and TypeScript • Experience designing and delivering complex operator interfaces, administrative consoles, infrastructure-management products, or other workflow-heavy applications • Strong frontend architecture skills, including component design, application state management, data fetching, routing, forms, validation, and error handling • Experience integrating frontend applications with RESTful or similar platform APIs • Understanding of asynchronous and distributed-system behavior, including long-running operations, partial failures, retries, and eventual consistency • Backend development experience, preferably with Kotlin and Spring Boot, or ability to become productive in that stack • Experience collaborating on API schemas and contracts with backend engineers • Strong testing practices across unit, component, integration, and end-to-end testing • Familiarity with authentication, authorization, secrets handling, and secure frontend development • Experience instrumenting applications so failures can be diagnosed across browser, API, and backend service boundaries • Strong product and user-experience instincts • Clear communication skills and ability to work closely with engineers across frontend, backend, infrastructure, and operations • Must be currently authorized to work in Costa Rica • Must be able to participate in interviews and conduct business entirely in English • Must be able to work primarily within U.S. business hours when required • Dedicated workspace and reliable high-speed internet suitable for remote work

🏖️ Benefits

• Annual bonuses tied to company performance and individual contributions • Private medical, dental, vision, and life benefits • Company-paid counseling, coaching, and resources for you and your family through Spring Health • Paid parental leave plans • Equity stock options at hire, with annual performance-based grants • LinkedIn Learning membership • Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community • Remote work arrangement • In-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development