Senior fullstack engineer (actiontrace)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Fullstack Engineer (ActionTrace) based in Ireland.
This role sits at the intersection of product engineering, scalability, and intelligent automation, contributing to a platform designed to optimize and automate complex enterprise workflows. You will work on both web and desktop applications with a strong emphasis on performance, maintainability, and data-driven systems. The environment is fast-paced, remote‑first, and highly collaborative, bringing together distributed engineering talent across Europe and beyond. You will be part of a team building systems that increasingly leverage AI and large‑scale data processing to solve real operational challenges. This position is ideal for an engineer who enjoys deep technical ownership and building production‑grade systems end‑to‑end. You will have the opportunity to influence architecture, improve engineering practices, and shape product direction in meaningful ways.

Design, build, and maintain scalable fullstack features across web and desktop applications using Ruby on Rails and modern JavaScript frameworks.
Develop clean, efficient, and testable backend code, ensuring high reliability and maintainability across the platform.
Collaborate with cross‑functional teams to define technical requirements, translate business needs into engineering solutions, and deliver production‑ready features.
Participate in code reviews, debugging, and system improvements to enhance overall code quality and platform performance.
Contribute to architecture discussions and technical decision‑making for scalable system design.
Mentor peers and contribute to improving engineering practices, documentation, and team workflows.
Explore and integrate AI/LLM‑based tools and workflows to improve development efficiency and product capabilities.

Requirements

5+ years of experience with Ruby and Ruby on Rails in production environments.
Strong frontend skills with JavaScript and experience using Hotwire or similar modern frontend approaches.
Solid understanding of software engineering principles including OOP, testing methodologies, and system design.
Experience building and maintaining scalable, test‑driven applications in fast‑paced environments.
Familiarity with big data systems such as ClickHouse or Apache Cassandra is a plus.
Exposure to AI/ML concepts or LLM‑based development workflows is highly valued.
Strong communication skills in English and ability to collaborate effectively in remote, distributed teams.
Strong analytical thinking with the ability to evaluate trade‑offs across performance, security, and maintainability.

Benefits

Fully remote position in a globally distributed engineering team.
Opportunity to work on a complex, high‑scale automation and data platform.
High technical ownership with real influence on architecture and product direction.
Exposure to AI/LLM‑driven engineering workflows and modern tooling.
Strong engineering culture focused on feedback, learning, and continuous improvement.
Competitive compensation aligned with experience.
Challenging technical environment with significant growth opportunities.

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