Senior Frontend Engineer

Reforged Labs Boa is the AI creative intelligence agent that answers all your questions about what ads are performing, why they work, and what to create next. We’re a small and nimble team with backgrounds from Google, Microsoft, and Harvard, and we’re backed by world-class investors, including DCM, Y Combinator, the founder of King and Sky Mavis, and executives from Niantic and Pocket Gems. Top 3 reasons to join us Build AI that powers top global gaming studios World-class team from Harvard & FAANG High salary and bonus with proven market fit About Us Reforged Labs is a YC-backed, Sandhill Road funded AI startup revolutionizing how the world's top mobile gaming studios market themselves to hundreds of millions of players. We're building cutting-edge AI technology that powers sophisticated ad analysis and generation pipelines for elite global gaming companies. We don't follow trends; we set them. Our engineering team builds solutions that rival the best Silicon Valley has to offer, creating technology that generates millions of dollars in value for our customers. The Role We're seeking an exceptional Senior Frontend Engineer to join our fast-growing team in Ho Chi Minh City. This is not a role for the average developer; we're looking exclusively for extraordinary talent who can compete with the best engineers globally. You'll architect and implement sophisticated user interfaces that seamlessly integrate with AI-powered systems, working at the intersection of advanced frontend engineering, real-time data processing, and machine learning operations. Your code will directly impact how hundreds of millions of players discover and experience games through AI-driven interfaces. Core Responsibilities Architect and implement intelligent chat interfaces that handle complex AI agent workflows with real-time streaming responses Build sophisticated UIs for multi-agent systems with advanced state management and high-performance data visualization Create elegant interfaces for AI-generated content, analytics dashboards, and agentic workflow management Collaborate with backend engineers to integrate AI services and drive technical decisions that shape our platform architecture Ship production-ready AI interfaces that provide demonstrable multi-million dollar value to our customers Your Skills and Experience Required Experience 5+ years building complex, data-intensive frontend applications with expert-level Next.js and React mastery Proven experience building production AI chat interfaces with streaming responses and real-time collaborative systems Deep expertise managing complex application state for multi-agent workflows and concurrent AI operations Track record delivering high-performance UIs with advanced optimization techniques and exceptional attention to detail Having built production AI interfaces that handle prompt engineering, context management, and error recovery Professional English communication skills—both verbal and written Essential Qualities Self-leadership with ability to drive initiatives from conception to completion independently High standards combined with speed and execution focus to ship exceptional experiences rapidly Intellectual curiosity about AI trends and passion for solving complex technical challenges Collaborative mindset thriving in environments where technical excellence is valued Why You'll Love Working Here What We Offer Industry-leading compensation package targeting top-tier engineers (significantly above local market rates) Work on genuinely world-class AI technology that competes globally and sets new industry standards Early engineer opportunity at a rapidly growing, well-funded AI startup with direct impact on products reaching hundreds of millions of users Challenging, fast-paced environment accelerating professional growth with potential for international recognition Collaborative culture where your ideas matter and technical excellence is valued Our Engineering Culture We operate in agile sprint cycles with a focus on rapid iteration and continuous delivery. Our team values independence and ownership, with each engineer taking full responsibility for their features from architecture to production deployment. We maintain high standards for code quality and user experience while moving quickly to meet market demands. We are building a culture that combines Silicon Valley engineering practices with exceptional local talent. Located in Ho Chi Minh City, we've created a work environment that combines Silicon Valley engineering practices with local talent, offering the unique opportunity to work on global-scale problems while being part of Vietnam's growing tech ecosystem. We are an equal opportunity employer and value diversity at our company. We leverage both our own proprietary models as well as open-sourced ones to achieve state-of-the-art performances for our application purposes. These models include Diffusion Models, LLMs and Deep Recommender Systems. Our software stack is using the most popular frameworks and languages in the AI industry, such as Javascript, Python and Rust on top of the infrastructure stack of things such as Docker, Nginx and Kubernetes. Our team always stays on top of the latest trends to ensure that we are defensible and can produce the best results consistently. Initial Technical Screen (45-60 mins) Advanced React problem-solving exercise and technical background discussion High-level experience overview focused on AI interface experience Take-Home Project (1 week to complete) Real-world AI interface challenge demonstrating production-ready component skills Project Review & Architecture Discussion (60-90 mins) Deep dive into implementation, advanced architecture, and performance optimization Complex state management and real-time systems challenge Final Leadership Conversation (60 mins) Vision alignment with founders and culture fit discussion Two-way Q&A about growth opportunities We aim to complete the entire process within 2-3 weeks.