Principal Infrastructure Security Engineer at Ridgeline

EducationPals; Dublin; Remote; EUR 120,000 - 180,000; Full time

Job summary

Ridgeline in Dublin, Ireland, invites an experienced Principal Infrastructure Security Engineer to shape the security blueprint across our cloud and infrastructure. You will lead architecture decisions, define invariants that guide engineering teams, and drive security posture across all environments and product lines.

The role requires strategic thinking, hands-on expertise in cloud security, and the ability to influence cross-functional teams.

Responsibilities

• Set the direction for cloud and infrastructure security across every product line, account, and environment.
• Define the architecture vision and the security invariants that guide engineering decisions.
• Be accountable for Ridgeline’s overall cloud security posture.

Job description

Ridgeline Logo Principal Infrastructure Security Engineer Principal Infrastructure Security Engineer Location: Dublin, IE Ridgeline is hiring a Principal Infrastructure Security Engineer to set the direction for cloud and infrastructure security across every product line, account, and environment. You will define the architecture vision and the security invariants that guide engineering decisions, and you will be accountable for Ridgeline’s overall cloud security posture. [...] At Ridgeline, how

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Build the first stage that finds relevant passages before span extraction begins.

Implement models that predict start and end positions of answer spans within passages.

4. Training Data and Fine-Tuning

Prepare annotated datasets and fine-tune models for domain-specific span extraction.

5. Evaluation and Error Analysis

Measure extractive QA performance using overlap metrics and qualitative review methods.

6. High-Stakes Domain Applications

Adapt extractive QA for legal, compliance, medical, and technical documentation where precision matters.

7. Production System Design

Deploy extractive QA systems with citation features, user feedback loops, and monitoring.

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