# Senior Software Engineer - REDAPL Graph Engine

**Company:** [Datadog](https://hotfix.jobs/companies/datadog)
**Location:** Dublin, Ireland, Madrid, Spain, Paris, France, Lisbon, Portugal
**Role:** Backend Engineering
**Experience:** 5+ years
**Skills:** Backend Engineering, Distributed Systems, Query Engines, Query Planning, Graph Databases, Neo4J, Memgraph, Janusgraph, Arangodb, Amazon Neptune, Apache Iceberg, Trino, Apache Calcite, Substrait, Datafusion
**Posted:** 2026-08-14

> Build and operate REDAPL’s high-scale distributed backend, including data ingestion, processing, and query infrastructure for relationship traversal. The role requires significant backend experience, work with multiple data stores, and leadership of platform initiatives focused on scalability, resilience, and performance.

## Job Description

## Responsibilities

- Build a query engine that supports efficient relationship traversals for demanding workloads.
- Contribute to high-priority, high-visibility projects that increase platform value, resilience, and scalability across multiple teams.
- Lead and guide engineers through architectural platform decisions.
- Identify system risks and reliability trends, and design solutions to address them.
- Provide input on prioritizing engineering-led initiatives and short- and long-term roadmaps.
- Collaborate with internal product teams to understand requirements and plan for product growth as they integrate with and depend on REDAPL.

## Requirements

- Bachelor's, master's, or doctoral degree in Computer Science, Engineering, or a related scientific field, or equivalent experience.
- Extensive experience with multiple types of data stores.
- Several years contributing to platform- or infrastructure-focused initiatives.
- Experience leading impactful technical initiatives where performance, cost efficiency, ease of use, and resilience/operability are first-order concerns.
- Significant back-end engineering experience building and operating distributed systems at high scale.

## Nice-to-haves

- Experience with graph databases such as Neo4j, Memgraph, JanusGraph, ArangoDB, Amazon Neptune, or PuppyGraph.
- Production-grade experience with Apache Iceberg.
- Strong understanding of query planning or experience contributing to production-grade query engines or related projects such as Trino, Calcite, Substrait, or DataFusion.

## Benefits

- Build tools for software engineers and use them to accelerate development.
- Influence product direction and business impact.
- Work with skilled, knowledgeable, and supportive teammates.
- Competitive global benefits.
- Continuous professional development.

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