Staff Engineer: Web Platform & Growth Systems Lead

United States Digital Space LLC; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Job summary

Fin, the AI Customer Agent company, invites a Staff Engineer to shape the architectural direction of our web platform. You’ll lead across marketing, analytics, design, data science, and engineering to build a modern, measurable, high-performance web stack.

You’ll own long‑term technical strategy, mentor engineers, improve reliability, and partner with product and exec teams to align roadmaps with business goals, delivering delightful experiences across channels.

Qualifications

• 8+ years of software engineering experience.
• Experience in a high-scale growth-focused web environment.
• Track record of technical leadership across teams or departments.
• Deep expertise in Next.js and the React ecosystem.
• Experience with headless CMS platforms such as Contentful or Sanity.
• Experience with infrastructure-as-code (Terraform), cloud platforms (AWS, CloudFront, S3), and deployment platforms (Vercel).
• Experience designing or operating experimentation infrastructure - A/B testing frameworks and event instrumentation.
• Strong understanding of web analytics and data instrumentation.
• Comfortable working in and supporting full-stack codebases; frontend architecture awareness.
• Experience operating in continuous delivery environments with incremental shipping.
• Exceptional communication skills and cross-functional collaboration.
• Mentorship mindset — raising engineering standards across teams.

Responsibilities

• Own and evolve the architecture of Fin's web platform.
• Define the long-term technical strategy for the web team, focusing on scalability, performance, developer productivity, observability, and system reliability.
• Collaborate with marketing, design, analytics, and data science stakeholders to ensure the platform supports their goals with accuracy, performance, and agility.
• Lead and influence the design and implementation of MarTech systems for event tracking, attribution, funnel reporting, and A/B testing infrastructure.
• Partner with engineers across web, infrastructure, and data to create a high-quality, cohesive technical ecosystem.
• Mentor and elevate engineers across the team and organisation — guidance on architecture, data modeling, system design, and engineering best practices.
• Set the standard for technical excellence in reliability, maintainability, code quality, and operational readiness.
• Provide technical leadership and insight to Engineering Managers, Product Managers, and executive stakeholders - communicating risks, trade-offs, and opportunities clearly.
• Contribute hands‑on to the codebase — leading by example and helping unblock and accelerate key projects.

Skills

Next.js

React ecosystem

Cross-functional leadership

Strong communication

Mentorship

Web platform architecture

High-scale web systems

Code quality and reliability

Tools

Contentful

Sanity

Terraform

AWS

CloudFront

S3

Vercel

Eppo

Google Tag Manager

Job description

Fin, the AI Customer Agent company, invites a Staff Engineer to shape the architectural direction of our web platform. You’ll lead across marketing, analytics, design, data science, and engineering to build a modern, measurable, high-performance web stack.

You’ll own long‑term technical strategy, mentor engineers, improve reliability, and partner with product and exec teams to align roadmaps with business goals, delivering delightful experiences across channels.