Mid/Senior Frontend Engineer

over99

Senior Frontend Engineer responsible for high-performance web applications in crypto gaming. Collaborating with cross-functional teams and developing rich, real-time user interfaces.

Posted 6/4/2026full-timeRemote • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptReactTypeScriptVue.js

About the role

Key responsibilities & impact

Build and improve high-quality frontend features across the Over99 webapp and games surfaces.
Work with React, Vue 3, TypeScript, Vite, and modern frontend tooling to deliver fast, reliable user experiences.
Own frontend implementation for interactive product flows across wallets, balances, gameplay, account features, promotions, and real-time updates.
Collaborate with engineers on frontend architecture, reusable components, state management, and performance optimization.
Build and refine real-time client-server features using technologies like Socket.IO, WebSockets, and event-driven updates.
Contribute to game-facing frontend experiences involving animations, sound, timing, physics, and responsive interaction patterns.
Partner closely with product managers, designers, backend engineers, and QA to deliver polished end-to-end features.
Use Cursor IDE, LLMs, and AI-assisted coding workflows heavily as part of day-to-day engineering, including MCP-powered integrations and custom tooling on top of Cursor.
Use observability practices and tools like Datadog to understand frontend health, debug production issues, and improve user impact.
Write maintainable, tested code and contribute to code reviews, CI/CD workflows, and team engineering standards.
Mentor less experienced engineers through thoughtful reviews, pairing, technical guidance, and strong examples of ownership.

Requirements

What you’ll need

4+ years of professional software engineering experience, with strong frontend engineering depth.
Proficiency with JavaScript, TypeScript, HTML, CSS, and modern frontend development.
Strong experience building production web applications with React, Vue, or similar modern frontend frameworks.
Solid understanding of component architecture, state management, API integration, and responsive UI development.
Experience building or optimizing high-performance interactive experiences, including animations, real-time updates, and client-server communication.
Comfort using AI-assisted engineering workflows with Cursor IDE, LLMs, and related developer tools.
Strong Git, code review, testing, CI/CD, and modern development workflow experience.
Ability to work independently in a remote-first team while staying communicative, reliable, and ownership-driven.
Strong product sense, debugging ability, and practical judgment when balancing quality, speed, and maintainability.

Benefits

Comp & perks

Competitive Salary – We pay top-of-market for top-tier talent
Remote-First Work Environment – Work from anywhere
Generous Holiday Allowance
Flexible Time Off & Hours – We focus on output
Performance-Related Bonus – We reward meaningful impact

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaScriptTypeScriptHTMLCSSReactVue 3Socket.IOWebSocketsperformance optimizationAPI integration

Soft Skills

communicationownershipmentoringcollaborationdebuggingproduct sensereliabilityindependencetechnical guidancejudgment