Frontend Senior Developer

Litmus7 Systems Consulting Ltd.; San Ramon (CA); On-site; USD 140,000 - 150,000; Full time

Job summary

Litmus7 Systems Consulting Ltd. seeks a seasoned Senior Front-end Developer to lead design and delivery of high-performance web apps using Next.js and React. You will work with design, product, and content teams to create fast, accessible experiences, while mentoring juniors and upholding engineering standards.

The role emphasizes hands-on leadership, strong SEO/AEO focus, and collaboration across cross-functional teams to deliver cohesive product experiences in an in-office setting.

Qualifications

• 8+ years in front-end development, with 3+ years in React and Next.js in production.
• Strong knowledge of technical SEO and AEO concepts.
• Full-time in-office role; Bachelor's degree in CS/Engineering or related field.

Responsibilities

• Front-End Development: design and maintain scalable web apps with Next.js and React.
• Optimize performance: Core Web Vitals, bundle size, and rendering strategy.
• Headless architecture: integrate front-end with headless CMS and APIs.
• Design content models and API patterns for reusable components.
• Collaborate with backend teams on API contracts and data-fetching.
• Experience with Shopify is a plus.
• Implement SEO and AEO best practices in Next.js apps.

Skills

React

Next.js

Performance optimization

SEO knowledge

AEO understanding

Headless architecture

Education

Bachelor’s degree in CS/Engineering

Tools

Shopify experience

Job description

Salary Range: $140,000 to $150,000 per Annum

• We are seeking a seasoned Senior Developer with deep expertise in Next.js and React to lead the design and delivery of high-performance, scalable web applications.
• This is a hands-on technical role for someone who combines strong front-end engineering fundamentals with the ability to develop solutions on headless platforms and optimise digital experiences.
• The developer will work closely with design, product, and content teams to build fast, accessible, and discoverable web experiences, while mentoring junior developers and championing engineering best practices across the team.

Key Responsibilities:

• Front-End Development: Design, build, and maintain scalable web applications using Next.js and React, following modern best practices (App Router, server components, incremental static regeneration, etc.).
• Optimise application performance:Page load speed, Core Web Vitals, bundle size, and rendering strategy (SSR/SSG/ISR/CSR).
• Headless Architecture & Integration: Architect and integrate front-end applications with headless CMS platforms (e.g.,Builder.IO Contentful or similar) and headless commerce/API-driven backends.
• Design content models and API integration patterns that support flexible, reusable, and scalable front-end components.
• Collaborate with backend and platform teams to define clean API contracts and data-fetching strategies for headless environments.
• Working knowledge of Shopify (core Shopify experience is a plus).
• SEO & AEO Optimisation: Implement technical SEO best practices metadata, structured data (schema.org), sitemaps, canonical tags, and crawlability within Next.js applications.
• Apply emerging Answer Engine Optimisation (AEO) practices to structure content and markup for discoverability and accurate representation in AI-driven answer engines and conversational search.
• Partner with content and marketing teams to translate SEO/AEO requirements into technical implementation.
• Monitor and improve search visibility, Core Web Vitals, and answer-engine readiness through ongoing audits and iteration.
• Engineering Leadership & Collaboration: Participate in architecture discussions, code reviews, and technical design decisions, raising the overall engineering bar.
• Mentor junior and mid-level developers, fostering strong front-end engineering practices across the team.
• Collaborate closely with UX/UI designers, product managers, and backend engineers to deliver cohesive, high-quality product experiences.
• Champion engineering best practices testing, CI/CD, code quality, and documentation.

Qualifications & Experience Mandatory Requirements:

• Minimum 8+ years of professional front-end development experience, with at least 3 years working extensively with React and Next.js in production environments.
• Solid working knowledge of technical SEO, and familiarity with (or strong interest in) Answer Engine Optimisation (AEO) and how AI-driven search/answer engines consume web content.
• Experience with performance optimisation, Core Web Vitals, and modern build/deployment tooling.
• This is a full-time, in-office role at client location.
• Educational Background: Bachelor’s degree in computer science, Engineering, or a related field.
• Equivalent demonstrated experience and a strong portfolio will be given equal weightage.

Presentation & CommunicationExpectations:

• Given the cross-functional nature of this role, the candidate must demonstrate the following :-
• Ability to clearly articulate technical decisions and trade-offs to both technical and non-technical stakeholders.
• Confidence presenting architecture proposals, performance audits, and SEO/AEO strategy in design and planning sessions.
• Strong written communication for technical documentation, code reviews, and knowledge-sharing.
• Collaborative mindset when working with designers, content teams, and product managers to align technical implementation with business goals.

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