Principal Engineer, Web Platform & Growth

Rozgoo; Dublin; On-site; EUR 120,000 - 180,000; Full time

Job summary

Fin is seeking a Principal Engineer to shape the technical direction and architecture of our web platform. You will lead across marketing, analytics, design, data science, and engineering to ensure a modern, scalable, and measurable web stack.

You will own long-term strategy, drive improvements in performance, reliability, and developer productivity, and mentor engineers while contributing hands-on to key initiatives.

Qualifications

• 12+ years of software engineering experience.
• Experience in a high-scale growth-focused web environment.
• Track record of technical leadership and influencing direction across teams.
• Deep expertise in Next.js and the React ecosystem.
• Experience with headless CMS platforms such as Contentful or Sanity, including content modeling and multi-site architecture.
• Experience with infrastructure-as-code (Terraform) and cloud platforms (AWS, CloudFront, S3) and deployment platforms (Vercel).
• Experience designing or operating experimentation infrastructure (A/B testing, event instrumentation, attribution).

Responsibilities

• Own and evolve the architecture of Fin's web platform.
• Define long-term technical strategy for the web team, focusing on scalability, observability, and reliability.
• Collaborate with marketing, design, analytics, and data science to support goals with accuracy and speed.
• Lead the design and implementation of MarTech systems for tracking and experimentation.
• Mentor engineers on architecture, data modeling, and best practices.
• Set standards for reliability, maintainability, and code quality.
• Provide technical leadership to stakeholders and teams.
• Contribute hands-on to the codebase to unblock key projects.

Skills

Next.js

React ecosystem

Web architecture

Technical leadership

Cross-functional leadership

Terraform

AWS

CloudFront

S3

Vercel

A/B testing infra

Observability

Tools

Contentful

Sanity

Job description

Fin is seeking a Principal Engineer to shape the technical direction and architecture of our web platform. You will lead across marketing, analytics, design, data science, and engineering to ensure a modern, scalable, and measurable web stack.

You will own long-term strategy, drive improvements in performance, reliability, and developer productivity, and mentor engineers while contributing hands-on to key initiatives.