Senior Software Architect — Hybrid, Enterprise SaaS

GCS Recruitment; Dublin; Hybrid; EUR 110,000 - 140,000; Full time

Job summary

GCS Recruitment is seeking a Senior Software Architect to define and evolve the technical architecture of an enterprise‑scale SaaS platform in Dublin. This hybrid role collaborates across backend, frontend, mobile, DevOps, and QA teams to ensure security, scalability and high performance.

You will lead architecture decisions, design APIs, review code, optimise performance, and mentor engineering teams while engaging with Product Management and other senior stakeholders to drive platform

Qualifications

• 10+ years of experience designing and developing enterprise-level software solutions.
• Strong understanding of distributed systems, microservices and API design.
• Experience with Java technologies including Spring Boot, REST APIs and Hibernate.
• Experience with AWS services (EC2, ECS/EKS, S3, RDS, Lambda, IAM, CloudWatch).
• Knowledge of security (OAuth2, OpenID Connect, TLS and secrets management).
• Familiarity with caching, load balancing and horizontal scaling.
• Experience with monitoring/observability tools (Prometheus, Grafana, OpenTelemetry).
• Strong communication skills with both technical and non-technical stakeholders.

Responsibilities

• Define and evolve end-to-end architecture across frontend, backend, mobile, databases and cloud infrastructure.
• Translate business requirements into scalable, secure and high-performing solutions.
• Design APIs, service boundaries, data models, integration patterns and deployment architectures.
• Guide development teams to follow the architecture and best practices.
• Conduct design and code reviews and architectural assessments.
• Maintain architecture documentation and development guidelines.
• Lead performance analysis and optimisation across services and infrastructure.
• Participate in incident management and lead post-incident reviews for improvements.

Skills

Enterprise software design

Distributed systems

Microservices

API design

Cloud-native architecture

Java technologies

Spring Boot

REST APIs

Hibernate

JVM performance tuning

AWS (EC2, ECS/EKS, S3, RDS, Lambda,IAM

OpenID Connect / OAuth2 / TLS

Secrets management

Caching & load balancing

Performance profiling

Observability (Prometheus, Grafana, OＴ

Architecture evaluation & technology选择

Effective communication

Education

Bachelor’s degree in Computer Science or Engineering

Job description

GCS Recruitment is seeking a Senior Software Architect to define and evolve the technical architecture of an enterprise‑scale SaaS platform in Dublin. This hybrid role collaborates across backend, frontend, mobile, DevOps, and QA teams to ensure security, scalability and high performance.

You will lead architecture decisions, design APIs, review code, optimise performance, and mentor engineering teams while engaging with Product Management and other senior stakeholders to drive platform