Senior Front end DeveloperOctopus HR • Toronto, ON, CA

Senior Front end Developer

Octopus HR • Toronto, ON, CA

3 days ago

Job type

Full-time

Quick Apply

Job description

Senior Front End Developer

Front-End Expert (80%) with Backend Development Capabilities (20%)

We’re partnering with Pluvo, a growing fintech startup, to find an experienced Senior Full Stack Developer to join their team at a critical stage of scale.

If you love solving complex performance challenges, optimizing systems for scale, and working with cutting-edge technologies — this role is your chance to make a direct impact on a product used by finance teams every day.

Your Role & Ownership

Technical Leadership & Architecture

Define and drive the front-end technical strategy and architecture decisions
Own the entire front-end codebase, component library, and design system
Establish front-end best practices, coding standards, and development workflows
Make critical technology decisions that shape the product's future
Lead technical discussions with Product, Design, and Backend teams

Building Data-Intensive Interfaces

Build and optimize complex data grid interfaces displaying large financial datasets

Implement sophisticated table components with sorting, filtering, grouping, and real-time updates

Create intuitive financial dashboards with interactive charts and data visualizations showing forecasts, scenarios, and variance analysis

Build compelling visual representations of financial data using modern charting libraries (line charts, bar charts, waterfall charts, heatmaps, etc.)

Handle client-side data transformations and state management for complex financial calculations

Optimize rendering performance for data-heavy visualizations with millions of data points

Modern Component Systems

Develop and maintain reusable, composable component systems using Next.js and React best practices

Build pixel-perfect interfaces from Figma designs with meticulous attention to detail

Implement and evolve the design system for consistency across the application

Create beautiful, accessible UI using Tailwind CSS utility-first approach

Performance & User Experience

Own front-end performance - optimize rendering for data-heavy financial calculations and visualizations

Implement smart caching strategies and memoization for complex component trees

Ensure buttery-smooth interactions even with millions of data points

Build intuitive user flows that make complex financial operations feel simple

Champion accessibility and best practices across all interfaces

Backend Development & API Integration

Build lightweight Node.js endpoints and API routes when needed to support front-end features

Collaborate closely with Back end team to define API contracts and data structures

Develop serverless functions or Next.js API routes for data processing and third-party integrations

Write SQL queries and work with databases (PostgreSQL) for data retrieval and manipulation

Consume RESTful and GraphQL APIs effectively with proper error handling and loading states

Understand backend data models to build efficient front-end data flows

Contribute to API design discussions from a front-end perspective

Troubleshoot integration issues and optimize data fetching patterns

Team Collaboration & Mentorship

Work closely with Product and Design to translate vision into technical execution

Mentor and guide junior developers as the team grows

Conduct code reviews and elevate the overall code quality

Contribute to hiring and building the front-end team

Foster a culture of excellence in front-end development

Requirements

5+ years of professional front-end development experience with production React applications

Proven experience owning front-end codebases and making architectural decisions independently

Expert-level proficiency in React and Next.js - you understand React internals, hooks patterns, and performance optimization deeply

Deep TypeScript expertise - you write type-safe code and leverage advanced TypeScript features

Strong Tailwind CSS skills - you can rapidly build responsive, beautiful interfaces with utility classes

Experience building complex data grid systems - you've worked with large datasets, virtual scrolling, and high-performance table rendering

Strong product sense - you think about user experience and can push back constructively on designs

Proven track record shipping polished, production-ready UIs with excellent attention to detail

Strong understanding of modern JavaScript (ES6+), async patterns, and browser APIs

Experience with state management solutions (Context API, Zustand, Redux, or similar)

Solid understanding of responsive design, CSS Grid, Flexbox, and mobile-first development

Strong API consumption skills - you know how to work effectively with RESTful and GraphQL APIs

Practical backend experience - comfortable writing Node.js code, API routes, and basic SQL queries when needed

Experience with Git / GitHub workflows and collaborative development

Excellent communication skills and ability to work independently in a fast-paced environment

Entrepreneurial mindset - you thrive with autonomy and can drive initiatives from concept to completion

Nice to Haves

Experience with AG Grid or similar enterprise data grid libraries (Tanstack Table, React Data Grid)

Familiarity with ShadCN / ui component library for building accessible, customizable components

Experience with Express.js or other Node.js frameworks for building more complex APIs

Experience working with PostgreSQL or other relational databases at scale

Understanding of database design, indexing, and query optimization

Experience with Radix UI primitives and building accessible UI components

Knowledge of data visualization libraries (Recharts, D3, Chart.js, or similar)

Experience building financial software, dashboards, or BI tools

Familiarity with fintech or FP&A platforms (Runway, Vena, Datarails)

Experience with animation libraries (Framer Motion, React Spring)

Knowledge of testing frameworks (Jest, React Testing Library, Playwright, Cypress)

Experience with tRPC for end-to-end typesafe APIs

Experience building and documenting design systems (Storybook)

Previous experience at a high-growth startup

Familiarity with CI / CD pipelines and deployment workflows

Experience with AWS services (Lambda, RDS, S3) or similar cloud platforms

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