Find Backend developer Jobs in Castleknock County Dublin

Software Architect
Holafly —Dublin, County Dublin
- Remote
- Spanish
- System design
- English
Senior Software Engineer, Revenue Engineering
Muck Rack —Dublin, County Dublin
- From €6,000 a month
- Remote
- Salesforce
- JavaScript
- Software development
- Annual leave
- Employee assistance program
Quick apply
13d
Staff/Lead Fullstack Engineer (Frontend-focused)
Mimica —Dublin, County Dublin
- Full-time
- Remote
- System design
- English
- Master's degree
- Annual leave
- Work from home
Software Engineer - Agentic AI & API Platform
Workday —Dublin, County Dublin
- €72,000–€108,000 a year
- Full-time
- Computer Science
- AWS
- Bachelor's degree
Agentic AI - Senior Software Engineer
Mastercard —Dublin, County Dublin
- Full-time
- System design
- Java
- JavaScript
Sr Software Engineer - SAP Commerce Cloud
Henry Schein Ireland —Dublin, County Dublin
- Full-time
- Computer Science
- DevOps
- Java
Senior React Developer
Broadridge —Dublin, County Dublin
- Full-time
- System design
- JavaScript
- Software development
Senior Manager, Software Engineering
Optum —Dublin, County Dublin
- Full-time
- System design
- Java
- Master's degree
Senior .NET Developer / Engineer
Tata Consultancy Services —Dublin, County Dublin
- Call to connect
- System design
- Windows
- SQL
Senior Software Engineer
EdgeTier —Dublin, County Dublin
- €64,000–€100,000 a year
- Full-time
- Hybrid work
- Maintenance
- SQL
- AWS
- Annual leave
Senior FastAPI Developer
Newcode.ai —Dublin, County Dublin
- Full-time
- Remote
- English
- Master's degree
- SQL
Quick apply
Senior Software Development Engineer
CarGurus —Dublin, County Dublin
- €78,000–€108,000 a year
- Azure
- Java
- SQL
Senior Backend Developer
MyHome.ie —Dublin, County Dublin
- Full-time
- Hybrid work
- Azure
- SQL
- Gym membership
Quick apply
9d
Senior Backend Developer
Information Services Corporation —Dublin, County Dublin
- Full-time
- Azure
- Computer Science
- Engineering
AI Developer
iCabbi —Dublin, County Dublin
- Full-time
- Master's degree
- AI
- Python
Sr. Full-Stack Developer (Python & Java)
Broadridge —Dublin, County Dublin
- Full-time
- English
- Java
- AWS
10d
Senior Full-Stack Developer
Citi —Dublin, County Dublin
- €71,440–€107,160 a year
- Full-time
- Hybrid work
- Computer Science
- DevOps
- Java
Application Technical Specialist
Citco —Dublin, County Dublin
- Full-time
- Management
- Java
- Master's degree
7d
Lead Backend Developer
Citi —Dublin, County Dublin
- €93,280 a year
- Full-time
- Hybrid work
- Azure
- Java
- Master's degree
Staff Software Engineer
EdgeTier —Dublin, County Dublin
- €85,000–€125,000 a year
- Full-time
- Hybrid work
- Maintenance
- SQL
- AWS
- Annual leave

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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

backend developer jobs in castleknock county dublin

Software Architect

Senior Software Engineer, Revenue Engineering

Staff/Lead Fullstack Engineer (Frontend-focused)

Software Engineer - Agentic AI & API Platform

Agentic AI - Senior Software Engineer

Sr Software Engineer - SAP Commerce Cloud

Senior React Developer

Senior Manager, Software Engineering

Senior .NET Developer / Engineer

Senior Software Engineer

Senior FastAPI Developer

Senior Software Development Engineer

Senior Backend Developer

Senior Backend Developer

AI Developer

Sr. Full-Stack Developer (Python & Java)

Senior Full-Stack Developer

Application Technical Specialist

Lead Backend Developer

Staff Software Engineer

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