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Senior Product Engineer (Frontend) - Developer Products

Kota Technologies Limited

Job Overview

Location

Remote

Job Type

Full-time

Full Job Description

📋 Description

• Own the Developer Products frontend stack end-to-end: architect, build, and continuously improve JavaScript SDKs, embeddable UIs, and web applications that power insurance and retirement benefits for millions of employees worldwide.
• Translate complex, multi-provider insurance flows into intuitive, type-safe, and accessible user experiences—think multi-step wizards with cross-field dependencies, conditional logic driven by age/provider rules, and Zod schemas with deep refinements that never allow invalid data to reach downstream systems.
• Design and maintain a component library that is consumed both internally and by external platform partners; ensure every component is WCAG-compliant, theme-customizable via CSS variables, and delivered as a lightweight, tree-shakeable package that keeps bundle size under 20 KB gzipped.
• Build and evolve a secure iframe-based embedding system: manage PostMessage event buses, origin validation, responsive sizing, and real-time theme overrides so any third-party platform can drop in Kota benefits in under five minutes without touching their build pipeline.
• Collaborate daily with backend engineers to craft contract-first, type-safe APIs using ts-rest or tRPC; define shared Zod schemas that propagate from server to client, eliminating an entire class of runtime errors and accelerating feature delivery by 30 %.
• Optimize performance obsessively: profile React re-renders, debounce keystrokes in 30-field forms, lazy-load provider-specific validation rules, and drive Time-to-First-Paint under 800 ms on 3G networks for embedded contexts.
• Instrument everything—Datadog RUM, distributed tracing, and custom analytics—to detect UX friction in production, then A/B test improvements that demonstrably increase conversion and reduce support tickets.
• Champion accessibility: implement ARIA patterns, keyboard navigation, and screen-reader announcements so employees with disabilities can enroll in benefits independently and confidently.
• Drive innovation by identifying unmet partner needs, proposing technical solutions, and shipping MVPs in days, not weeks; leverage AI tools (Claude, Cursor, Copilot) to generate boilerplate, refactor legacy code, and write exhaustive test suites so you can focus on high-impact product decisions.
• Participate in architecture guilds and RFC processes; influence the adoption of new patterns such as React Server Components, edge-side rendering, or monorepo tooling with pnpm workspaces and Turborepo to keep the codebase future-proof.
• Mentor mid-level engineers through pair programming, design reviews, and brown-bag sessions; foster a culture of psychological safety where every PR comment is a teaching moment.
• Contribute to hiring by crafting take-home challenges, interviewing candidates, and refining our employer brand posts on engineering blogs and social media.
• Own on-call rotation for the Developer Products domain; debug multi-layer validation stacks (client, server, API, provider) using distributed tracing, and turn incidents into durable fixes and post-mortems that prevent recurrence.
• Ship with confidence: maintain >90 % unit test coverage with Vitest, visual regression suites in Storybook, and end-to-end flows in Playwright that run in parallel on every PR.
• Stay curious—run quarterly spikes on emerging tech (e.g., WebAssembly for heavy validation, or CRDTs for real-time collaboration) and present findings that could become next-quarter OKRs.

🎯 Requirements

• 8 + years of modern frontend experience with deep expertise in React, TypeScript, and advanced patterns (hooks, context, composition, generics, conditional types).
• Proven ability to build and ship complex, type-safe forms with React Hook Form, Zod validation, multi-step wizards, and cross-field business logic.
• Production experience with React Router 7 or Next.js (SSR, loaders/actions, progressive enhancement) and type-safe API integration via ts-rest, tRPC, or GraphQL with codegen.
• Demonstrated ownership mindset: you identify opportunities, write RFCs, coordinate cross-team, and deliver features without waiting for specifications.
• Daily fluency with AI-assisted development—Claude, Cursor, Copilot—knowing when to trust, verify, and refine generated code.

🏖️ Benefits

• Competitive salary plus meaningful equity in a fast-growing Series A start-up backed by Eurazeo, EQT Ventures, Northzone, and Frontline.
• Health insurance contribution and workplace pension with company matching, administered seamlessly through the Kota platform.
• €1,000 annual WFH stipend for ergonomic chairs, monitors, or co-working passes—your choice.
• 25+ days PTO plus company-wide shutdown between Christmas and New Year, and an annual offsite in a European city with the entire team.

Skills & Technologies

JavaScript

TypeScript

React

Next.js

GraphQL

Frontend

Senior

Remote

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Kota Technologies Limited

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About Kota Technologies Limited

Kota Technologies Limited offers a platform designed to streamline employee benefits, including health insurance, pensions, life assurance, and flexible benefits. Kota's products integrate with HRIS and payroll systems like Payfit to automate benefits administration, aiming to reduce errors and improve employee engagement. They target people and finance teams, offering solutions for auto-enrollment and benefits management. Kota aims to solve the administrative burdens associated with fragmented benefits providers. They work with companies like Tines, Carwow, and Unmind.

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