Frontend/UI Developer

Larus Technologies•Ottawa, ON

3d•CA$80,000 - CA$90,000•Hybrid

About The Position

We are looking for a UI/Frontend Developer to join the Larus team. You will design and build the interfaces through which military planners, analysts, and decision-makers make sense of complex, high-stakes information, interactive maps with NATO symbology, AI-powered workflows, rich text and code editors, and collaborative scenario planning tools. This is not a dashboard role: you will build decision-support tools where clarity and responsiveness directly impact outcomes. You will own features end-to-end, from gathering requirements with domain experts, through architecture and implementation, to shipping tested code. We expect you to have opinions about how frontend applications should be structured, and the experience to back them up. You will influence technical direction, mentor junior developers, and contribute to a codebase built on Feature-Sliced Design, headless UI primitives, and a custom design system.

Requirements

University degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience;
Required to meet qualifications to obtain a Canadian Government security clearance (typically requires Canadian citizenship or permanent residency);
At least 2 years of professional frontend development experience;
Strong proficiency with React and TypeScript;
Experience with modern state management (Zustand, Redux Toolkit, or similar) and server state patterns (TanStack Query, SWR, or equivalent);
Experience with REST API integration and generated API clients;
Experience writing unit, integration, and end-to-end tests (Vitest or Jest, Testing Library, Playwright or Cypress);
Working knowledge of Git workflows and CI/CD pipelines;
Strong communicator comfortable gathering requirements from domain experts and presenting to both technical and non-technical audiences;
Genuine interest in the product, understanding what we're building and why.
GIS/geospatial interfaces- MapLibre GL, Mapbox, Leaflet, or OpenLayers; GeoJSON and spatial analysis;
Rich text editors (TipTap, ProseMirror, Slate) or code editors (CodeMirror);
AI/ML-powered UX- Integrating LLM services, building chat interfaces, or designing human-in-the-loop features;
User research- Planning usability studies, A/B tests, or surveys and translating findings into design improvements;
Docker, Azure DevOps, or similar deployment and CI/CD platforms;
Familiarity with Python for cross-team collaboration;

Nice To Haves

Frontend architecture - modular methodologies (Feature-Sliced Design or similar), clear module boundaries, incremental migration planning;
Design system ownership - design tokens, accessible components, visual consistency across themes and responsive layouts;
UI/UX design and validation - wireframing and prototyping (Figma), designing and interpreting user studies, accessibility standards (WCAG 2.1 AA);
Performance engineering - profiling React applications, bundle analysis, code splitting;
Technical communication - design diagrams, architecture decision records, documentation; and
Security awareness - OWASP top 10 frontend vulnerabilities and secure development practices.

Responsibilities

Gather requirements from subject matter experts (including defence and military specialists), design user flows, and deliver working software;
Architect and build complex, interactive React/TypeScript applications, geospatial interfaces, editors, data-dense views, and AI-integrated workflows;
Design and maintain frontend state effectively, choosing the right patterns for client, server, and UI state;
Build and extend a custom design system with headless primitives, scoped styling, and design tokens;
Plan and conduct user studies (usability testing, A/B experiments, surveys) and use findings to iterate on designs;
Write tests at every level, unit, integration, and end-to-end; and participate in code reviews;
Present designs and demos to stakeholders; and
Collaborate across disciplines, backend engineers, data scientists, and product managers, within an agile process.