Senior Platform Engineer - Dev Experience & Platform Scale

Devops Academy; Dublin; Hybrid; EUR 110,000 - 140,000; Full time

Benefits offered by this job

Competitive reward package with pre-IR

28 days vacation + anniversary days

Impact Day

Family leave and mental health support

Weekly catered lunch

Job summary

Personio is seeking a Senior Platform Engineer for Developer Experience to shape developer productivity across a large platform ecosystem. You will own platform solutions, govern GRPC/Protobuf, and build GraphQL middleware enabling hundreds of developers to ship faster.

You will collaborate with cross-functional teams, contribute to observability practices, and mentor others while maintaining highly available services and a strong engineering culture.

Qualifications

• Over 5 years of experience in platform engineering or backend development.
• Strong programming skills in Kotlin.
• Deep expertise in GRPC and Protobuf.
• Experience with GraphQL is a strong plus, particularly middleware or gateway layers.
• Demonstrated impact in observability and monitoring practices.
• Data-driven approach using metrics to evaluate performance and adoption.

Responsibilities

• Designing and supporting platform solutions for 300+ developers across 40+ product teams.
• Building and evolving GraphQL middleware layer that connects frontends with backend services.
• Creating internal tools and SDKs to enhance developer productivity and platform adoption.
• Establishing standards for GRPC, Protobuf, and GraphQL across the org.
• Analyzing and optimizing platform systems for scale, performance, and reliability.
• Collaborating with product teams for seamless platform integration.
• Documenting platform capabilities and conducting internal training sessions.
• Collaborating with Foundations to create a coherent developer platform.
• Driving technical excellence by simplifying architecture and reducing debt.

Skills

Kotlin

GRPC

Protobuf

GraphQL

Gradle

Observability

Metrics

Communication

Code reviews

Tools

Gradle

GraphQL middleware

GRPC governance

Protobuf governance

Job description

Personio is seeking a Senior Platform Engineer for Developer Experience to shape developer productivity across a large platform ecosystem. You will own platform solutions, govern GRPC/Protobuf, and build GraphQL middleware enabling hundreds of developers to ship faster.

You will collaborate with cross-functional teams, contribute to observability practices, and mentor others while maintaining highly available services and a strong engineering culture.