Senior Frontend Engineer, React & Next.js

B-Stock

6d•$145,000 - $175,000

About The Position

We're seeking an experienced Senior Frontend Engineer to lead the technical direction of B-Stock's marketplace experience. In this role, you'll architect and implement complex features within our Next.js-based applications, serving as the technical voice in cross-functional discussions and a trusted advisor on high-stakes initiatives. You'll balance strategic thinking with hands-on coding, mentor engineers, and serve as a bridge between technical and business stakeholders. This position requires a senior technologist who can navigate ambiguity, make sound architectural decisions under pressure, and advocate for both end-user experience and engineering excellence. You'll work on the company's most critical and visible projects, often in high-pressure situations requiring both technical depth and strong communication skills. This is a leadership-oriented individual contributor role for someone ready to operate at the highest levels of technical contribution.

Requirements

Bachelor's degree in Computer Science or equivalent experience
10+ years of professional software engineering experience
7+ years focused on frontend development
5+ years of production experience with React and modern frontend frameworks
3+ years working with Next.js or similar SSR/hybrid rendering frameworks
Proven track record architecting and delivering large-scale, customer-facing SaaS applications
Experience leading technical initiatives and mentoring engineers at various levels
Demonstrated ability to drive projects from ambiguous requirements to successful production launch
Experience working on high-pressure, high-visibility projects with executive stakeholder involvement
Expert-level proficiency in TypeScript, React 18+, and Next.js 15+ (App Router and Pages Router)
Deep understanding of modern frontend architecture including state management (TanStack Query, Context API)
Strong knowledge of CSS-in-JS solutions (styled-components) and responsive design patterns
Proficiency with frontend tooling: Webpack, Vite, Babel, ESLint, Prettier
Experience with testing frameworks: Jest, Vitest, React Testing Library, Playwright
Strong understanding of web performance optimization and Core Web Vitals
Familiarity with backend technologies and API design (RESTful, GraphQL)
Experience with CI/CD pipelines and containerized deployments (Docker, Kubernetes)
Git workflow expertise including pull request reviews and collaborative development

Nice To Haves

Experience with microservices architecture and event-driven systems
Knowledge of feature flag management and experimentation platforms
Familiarity with monitoring and observability tools (Datadog, Sentry)
Experience with design systems and component library development
Understanding of e-commerce, marketplace, or auction platforms
Exposure to MongoDB, RabbitMQ, or similar backend technologies

Responsibilities

Lead architectural design and implementation of complex features in our Next.js/React customer-facing applications
Make critical technical decisions balancing user experience, developer experience, scalability, and business requirements
Drive technical strategy for frontend architecture, including state management, performance optimization, and build tooling
Evaluate and introduce new technologies and patterns to improve development velocity and product quality
Own end-to-end delivery of high-complexity, high-visibility features from concept through production
Establish and enforce frontend engineering best practices, code quality standards, and testing strategies
Participate in technical discussions with non-technical stakeholders, translating business requirements into technical solutions
Represent engineering perspective in product planning, advocating for technical sustainability and user experience
Collaborate with engineering leadership on strategic initiatives, technical roadmaps, and critical decision-making
Partner with UX designers to influence design direction based on technical constraints and opportunities
Communicate technical complexity and tradeoffs clearly to diverse audiences including product, design, and leadership
Mentor mid-level and senior engineers through code review, pairing, and technical guidance
Elevate team capabilities by sharing knowledge on modern frontend patterns, Next.js ecosystem, and performance optimization
Foster a culture of engineering excellence, continuous improvement, and collaborative problem-solving
Guide engineers through complex technical challenges and help them grow their architectural thinking
Write production-quality TypeScript/React code for our customer-facing applications
Implement sophisticated UI interactions, real-time bidding interfaces, and responsive layouts
Optimize application performance including bundle size, Core Web Vitals, and runtime efficiency
Debug and resolve complex issues spanning frontend, API integration, and full-stack concerns
Conduct thorough code reviews ensuring quality, maintainability, and knowledge transfer
Build with accessibility, security, and scalability as foundational requirements
Integrate monitoring, logging, and observability tools (Datadog) for production debugging
Manage feature flag strategies using LaunchDarkly for safe, incremental rollouts
Ensure cross-browser compatibility and responsive design across devices
Implement comprehensive testing strategies using Jest, Vitest, React Testing Library, and Playwright
Design and implement authentication/authorization flows with multiple identity providers (OAuth2, FusionAuth, Salesforce, JWTs)

Benefits

Competitive compensation packages including bonus and options
Medical, dental, and vision benefits
Matching 401(K)
Paid time off
Telecommuting and remote-work options
Support for continuing education
Team off-sites, social events, annual company events, and frequent extracurricular activities
Unlimited snacks and drinks

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