Frontend/UI Developer

Full-time : 37.5 Hours per week, Monday to Friday
Location : Ottawa Office (Up to 3 days per week), 70 Laurier Ave West, Suite 310, Ottawa, ON K1P 5V5 and Ottawa-based Home Office, or, remote if located outside of the National Capital Region.
Reporting To : Technology Director
Salary Range: $80,000-90,000
Type of Vacancy: New

We are looking for a Frontend/UI 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. 

Key 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. 

Qualifications
Some individuals are less likely to apply for a job unless they consider they are a perfect match. At Larus Technologies, we welcome motivated individuals to our diverse and inclusive workplace. Thus, if you are excited about this role but do not have every qualification, we encourage you to apply anyway.  

• 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; and 
• Genuine interest in the product, understanding what we're building and why. 

Required Skills:

• 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; 

Desired Higher-Level Skills:
These are not required, but will set you apart and open pathways to seniority:

• 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, lazy loading, code splitting; 
• Technical communication - design diagrams, architecture decision records, documentation; and 
• Security awareness - OWASP top 10 frontend vulnerabilities and secure development practices. 

What You Can Expect

• A collaborative team working on problems that matter in the defence and security domain; 
• A modern tech stack - React 19, TypeScript, Zustand, TanStack Query, Vite, MapLibre GL, TipTap, Playwright, and a custom design system; 
• A well-structured codebase following Feature-Sliced Design; 
• Opportunities to shape architecture and technical direction; and 
• Room to grow into more experienced roles 

Benefits  

• Competitive compensation package; $80,000-90,000
• Comprehensive Health and Dental insurance package; 
• Competitive vacation and paid time off; 
• Company-sponsored team-building events; and
• Learning and development opportunities. 

About Larus
Based in Ottawa, Canada, Larus Technologies ( is a software company specializing in Artificial Intelligence (AI), Machine Learning (ML), Big Data Analytics, and Decision Support Systems (DSS). Larus has three core business lines: Data Fusion and Analytics, Data Science, and Research and Engineering. Larus software products include the patented Total::Insight™ DSS, the Total::Perception™ Systems Simulation Engine (SSE), and the Total::Vision™ Video Analytics Solution (VAS). Our Data Science and Engineering Consulting focuses primarily on Retail, Supply Chain Management, Public Safety, and Defence, while Research and Engineering focuses on innovations in advanced AI/ML across industries. Larus is renowned for its ability to solve complex customer challenges that require multi-sensor data collection, aggregation, exploitation, fusion, and analytics.

We thank all applicants; however, only those selected for an interview will be contacted. Upon completion of the recruitment process, all candidates interviewed will be notified if they are not selected for the role.

We use AI support tools to screen applicants for minimum role requirements. We may use artificial intelligence (AI) tools to assist with reviewing applications and assessing candidates against job-related qualifications. AI-generated recommendations support our recruitment process but do not replace human judgment. Hiring decisions are made by our hiring team. Applicants who require accommodation during the recruitment process may contact View email address on larus.applytojob.com 

At Larus, we celebrate diversity and are committed to creating an inclusive environment for all employees.

Larus has an accommodation process and provides accommodation for applicants with disabilities. If you have specific ergonomic needs or require other accommodation because of a disability or a medical need, please don’t hesitate to contact Larus at View email address on larus.applytojob.com to discuss arrangements.