Principal Software Engineer

Reperio Human Capital Ltd; Galway; Hybrid; EUR 110,000 - 140,000; Full time

Benefits offered by this job

Work From Home

Job summary

Reperio Human Capital Ltd is helping a start-up in Ireland hire a Principal Full Stack Engineer with deep Python and React experience. The role focuses on building scalable, production-grade systems with strong UI/UX and cross-functional collaboration across security and investigative contexts.

The position is hybrid, based in Dublin or Galway, with opportunities to guide architecture and lead technical direction while mentoring engineers.

Qualifications

• Strong professional experience with Python and FastAPI on the back end.
• React and TypeScript on the front end.
• Proven ability to design and deliver scalable, production-grade full-stack systems.
• Experience balancing hands-on development with strategic technical direction.
• Interest in security, defence, or investigative environments.

Responsibilities

• Lead design and development of full-stack apps with React frontends and Python backends.
• Build high-performance, intuitive UIs for complex workflows.
• Set architecture, standards and engineering best practices.
• Collaborate across product, design and domain experts.
• Provide technical leadership and mentorship across projects.

Skills

Python

React

AI

Kubernetes

TypeScript

Architecture

Job description

Job Description

Principal Full Stack Engineer (Python/React) Dublin/Galway (Hybrid)

I'm working with an exciting start-up in Ireland who is seeking a Principal Full Stack Engineer with deep expertise in Python and React to build intuitive, high-impact software.

Key Responsibilities

• Lead the design and development of full-stack applications, with a strong emphasis on React-based frontends and Python backends.
• Build high-performance, intuitive UIs for complex analytical and investigative workflows.
• Set and influence architecture, technical standards, and engineering best practices.
• Collaborate with product, design, and domain experts across security and investigative contexts.
• Provide technical leadership and mentorship, guiding engineers across multiple projects.

Essential Experience

• Strong professional experience with Python and Fast API on the back end.
• React and TypeScript on the front end.
• Proven ability to design and deliver scalable, production-grade full-stack systems.
• A passion for creating clear, usable interfaces in complex problem domains.
• Experience operating at a principal or lead level, balancing hands-on development with strategic technical direction.
• An interest in building impactful systems within security, defence, or investigative environments.
• Ability to operate in a start-up/scale-up environment and own/build the end-to-end system of set of features.
• Experience across a broad range of languages, technologies, and AI components.

Key Skills

• Python
• React
• AI
• Kubernetes
• TypeScript
• Architecture

Benefits

• Work From Home TPBN1_IJ