Senior Frontend Engineer
il y a 3 jours
Senior Frontend Engineer (React / TypeScript)
01TEK — Hybrid (2 days on-site)
Top-tier Salary
Immediate Start
The Mission
01TEK is looking for a Senior Frontend Engineer to own, scale, and refine production-grade React applications used by millions of users worldwide. This is a high-visibility role within a mature, professional environment that balances global-scale engineering challenges with a flexible, high-trust culture.
We operate with Agile/Scrum via Jira, but we maintain a "zero fake agility" policy—we value technical excellence and predictable delivery over bureaucratic overhead. If you are an engineer who prioritizes architecture, performance, and long-term maintainability, you will thrive here.
The Technical Bar
Core Mastery
Deep React Expertise: Advanced knowledge of the rendering model, Concurrent React (useTransition, useDeferredValue), and sophisticated state orchestration (Zustand, Jotai, or XState).
Strict TypeScript: We move beyond basic interfaces. You should be proficient with Generics, Discriminated Unions, and Mapped Types to ensure a bulletproof type system.
Modern JavaScript (ES2023+): Deep understanding of the Event Loop, Microtasks vs. Macrotasks, closures, and memory management.
Performance & Scale
Engineering for Millions: Proven experience optimizing for Core Web Vitals (specifically INP, LCP, and CLS) at scale.
Browser Internals: Mastery of the critical rendering path, resource prioritization, and minimizing main-thread blocking time.
Architecture: Experience working in large-scale Monorepos (Nx / Turborepo) and building/maintaining centralized Design Systems.
Quality & Testing (Non-Negotiable)
Mandatory Testing: Proficiency with Vitest / Testing Library and a "Test-First" mindset.
Resilience: Experience with E2E testing (Playwright) and network-level mocking using MSW.
Code Review Culture: A commitment to rigorous, transparent, and constructive peer reviews to prevent regressions before they reach production.
Your Role
Design & Enforce Architecture: Lead the technical direction of the frontend, ensuring modularity and scalability across multiple teams.
Own Quality: You don't just ship features; you ship documented, testable, and resilient code.
Collaborate: Work closely with Product and Design within a structured Scrum framework to deliver high-impact global features.
Mentor: Act as a technical lighthouse for mid-level engineers, promoting best practices in TypeScript and React.
What 01TEK Offers
Real Seniority: We pay for the complexity you handle and the bugs you prevent.
Professional Environment: A structured, corporate-standard workflow using Jira/Scrum, but with the flexibility of a modern tech hub.
Hybrid Work: 2 days on-site for high-bandwidth collaboration; 3 days of focused deep work.
Global Impact: Your code will be interacted with by millions. We provide the tooling and time to do it right.
Requirements
5+ years of experience building high-traffic, production web applications.
Expertise in React, TypeScript, and Vitest. and design framework and CSS
Experience with (SSR/RSC) is highly preferred.
A "Product Engineer" mindset—you care about the user experience as much as the code.
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