Find Principal engineer Jobs in Whitehall, D

Software Architect
Holafly —Dublin, County Dublin
- Remote
- Spanish
- System design
- English
Credit Risk Specialist - Barclaycard Europe - Secondment/FTC
Barclays —Dublin, County Dublin
- €73,000–€80,000 a year
- Management
- Analysis skills
- Analytics
6d
Join AECOM's growing Transportation Team in Ireland
AECOM —Dublin, County Dublin
- Full-time
- Hybrid work
- Master's degree
- Bachelor's degree
- Leadership
Principal Product Manager, Amplify Fusion
Axway Software SA —Dublin, County Dublin
- Computer Science
- Master's degree
- Bachelor's degree
- Annual leave
6d
Principal Mechanical Engineer
AECOM —Dublin, County Dublin
- Full-time
- Hybrid work
- Leadership
- Communication skills
Principal Software Engineer - Architecture
Mastercard —Dublin, County Dublin
- Full-time
- Java
- Software development
- Leadership
Procurement Manager
Turner & Townsend —Dublin, County Dublin
- Full-time
- Master's degree
- Contracts
- Leadership
- Annual leave
Quick apply
Principle Android Engineer
Elwood Roberts —Dublin, County Dublin
- €60,000–€70,000 a month
- Full-time
- System design
- English
- AWS
Quick apply
Principal Geotechnical Engineer
Cicad —Dublin, County Dublin
- Employee assistance program
Head of Architecture and Engineering Operations
EXL Service —Dublin, County Dublin
- Full-time
- Hybrid work
- Microsoft Excel
- Azure
- Computer Science
Principal Verification Engineer
Microchip Technology —Dublin, County Dublin
- Full-time
- Master's degree
- C++
- Bachelor's degree
14d
Project Manager - Installation & Digital Health Projects
Cardiac Services IRL —Dublin, County Dublin
- Full-time
- Engineering
- Project management
- IT
Quick apply
Senior Engineering Manager, API Hub
Bentley Systems —DUBLIN 2, County Dublin
- Communication skills
Principal Environmental Impact Assessment Consultant
AtkinsRéalis —Dublin, County Dublin
- Full-time
- Hybrid work
- Master's degree
- Project management
9d
Digital Transformation Lead
FedEx EU —Dublin, County Dublin
- Full-time
- Hybrid work
- Engineering
- English
- Master's degree
20h
Principal Software Engineer, AWS Lambda
Amazon Development Centre Ireland Limited —Dublin, County Dublin
- Full-time
- Computer Science
- AWS
- C++
Engineering Manager - Commerce Hub
Fiserv —Dublin, County Dublin
- Full-time
- Java
- AWS
- Agile
Principal Development Infrastructure Engineer (Civil)
AECOM —Dublin, County Dublin
- Full-time
- Hybrid work
- AutoCAD
Principal Engineer - Commerce Hub
Fiserv —Dublin, County Dublin
- Full-time
- Java
- AWS
- AI
Principal Security Engineer, AWS Security
Amazon Data Services Ireland Limited —Dublin, County Dublin
- Full-time
- AWS
- Leadership
- Python

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Software Architect

Holafly -
Dublin, County Dublin

Apply Now

Job details

Permanent

Qualifications

Spanish
Node.js
React
System design
English
Google Cloud Platform
Distributed systems
Terraform
REST
Django
Python

Full job description

Company Overview

Holafly is a high-growth scale-up revolutionising how businesses and travellers connect to the internet abroad. Since 2018, we’ve empowered travellers in over 200 destinations worldwide with secure and reliable eSIM solutions. With a team of 500+ professionals across multiple countries, we are scaling globally to support travellers with seamless, unlimited data connectivity.

We’re not just connecting people—we’re enabling freedom and peace of mind, ensuring our users stay connected from the second they land, wherever their journey takes them.

The Role

We're looking for a Software Architect to join our SME team — a group of senior technical leaders who act as the connective tissue between our engineering squads, setting standards, reviewing critical design decisions, and driving architectural evolution across Holafly's platform.

This is not a management role. This is a deeply technical, high-influence position for someone who loves solving hard problems, cares about system design at scale, and can communicate clearly with both engineers and stakeholders.

What You'll Do

Design and review highly available, resilient architectures across Holafly's distributed systems.
Lead architectural decisions for high-traffic, high-demand environments — we serve millions of concurrent users.
Define and evolve patterns for event-driven architectures using async messaging, queues, and streaming.
Establish and enforce REST API design standards, including versioning, contracts, and documentation strategies.
Apply Domain-Driven Design (DDD) principles to help teams define clear bounded contexts, aggregates, and domain events.
Collaborate with engineering squads on technical design, code reviews, and architectural fitness functions.
Guide the platform's evolution across our full stack: React SPAs, Node.js BFFs, Python/Django/Celery microservices, and Flutter mobile apps.
Ensure infrastructure best practices across GCP, using Terraform, Helm, and ArgoCD for reliable, scalable deployments.
Champion digital and web security practices — secure-by-design, threat modeling, and compliance.
Act as a trusted SME and escalation point for squads facing complex technical challenges.

What We're Looking For

Required

Proven experience as a Software Architect or Principal/Staff Engineer in high-scale production environments.
Deep knowledge of high availability and resilience patterns: circuit breakers, bulkheads, graceful degradation, multi-region strategies.
Experience designing systems for high-demand, high-concurrency use cases at scale.
Strong hands-on background with event-driven architectures: message brokers, event sourcing, CQRS, async workflows.
Solid REST API design expertise — contract-first, versioning, OpenAPI/Swagger, backward compatibility.
Applied knowledge of Domain-Driven Design: bounded contexts, ubiquitous language, aggregates, domain events.
Familiarity with the Holafly tech stack, or the ability to ramp up quickly across it.
Strong digital/web security background: OWASP, zero-trust, auth patterns (OAuth2, JWT), API security, data protection.
English is mandatory — you'll work with a distributed, international team and write architectural documentation in English.

Nice to Have

Experience with Spec-Driven Development (OpenAPI-first, AsyncAPI) — bonus points if you've integrated AI tooling into that workflow.
Spanish language skills are a plus, given our presence in Spanish-speaking markets and the composition of our team.

You'll Thrive Here If You

Can zoom out to see system-wide implications and zoom in to review a pull request.
Write and communicate as clearly as you code — architecture docs, RFCs, and ADRs are part of the job.
Are opinionated but not rigid — you can defend a position and change your mind with new evidence.
Care about developer experience as much as system performance.
Are comfortable with ambiguity and enjoy shaping technical direction, not just executing it.

Tech Stack

Our platform is mobile-first and cloud-native. You'll be working across:

Frontend: React (SPA), Backend for Frontend: Node.js (BFF pattern), Microservices: Python · Django · celery, Mobile: Flutter (app-first), Cloud: Google Cloud Platform (GCP), Infrastructure as Code: Terraform, Deployment: Helm · ArgoCD (GitOps), Architectural style: Event-driven · REST APIs · DDD

Apply Now

Refine Your Search

principal engineer jobs in whitehall, d

Software Architect

Credit Risk Specialist - Barclaycard Europe - Secondment/FTC

Join AECOM's growing Transportation Team in Ireland

Principal Product Manager, Amplify Fusion

Principal Mechanical Engineer

Principal Software Engineer - Architecture

Procurement Manager

Principle Android Engineer

Principal Geotechnical Engineer

Head of Architecture and Engineering Operations

Principal Verification Engineer

Project Manager - Installation & Digital Health Projects

Senior Engineering Manager, API Hub

Principal Environmental Impact Assessment Consultant

Digital Transformation Lead

Principal Software Engineer, AWS Lambda

Engineering Manager - Commerce Hub

Principal Development Infrastructure Engineer (Civil)

Principal Engineer - Commerce Hub

Principal Security Engineer, AWS Security

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