Senior Backend Engineer: Data APIs & Low-Latency

United States Digital Space LLC; Greater London; Remote; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Lunch provided

Private healthcare

Hybrid/Remote options

Mental health support

Paid parental leave

Job summary

The company is seeking a Senior Backend Engineer to join the Data Serving team, owning the boundary between raw product data and internal and external consumers, including dashboards, AI agents, and customers accessing their own data.

You will build APIs and the low-latency serving layer, ensure contract stability, and collaborate with Data Engineers and Product teams to deliver scalable, reliable data services.

Qualifications

• Strong backend engineering experience building and owning reporting and analytics API services and serving-layer infrastructure.

Responsibilities

• Build and own the Data API boundary: delivering clean, versioned, and performant endpoints for internal dashboards, customer-facing features, and third-party tools (e.g., Fivetran connectors via incremental syncs and cursor pagination).
• Design and optimise the read models, indexes, and caching strategies in Postgres (and future OLAP stores) to guarantee low-latency query performance.
• Build reliable integrations with the company’s Kotlin-based product backend services to ensure the serving layer surfaces the correct data required for a customer facing feature.
• Own the reliability and performance of the services you build: monitoring, incident response, and SLOs appropriate to customer-facing infrastructure.
• Partner with Data Engineers to define clean contracts between the ingestion/aggregation layer and the serving DB, ensuring read patterns match storage schemas.
• Partner with the Authorization team to secure APIs using industry-standard authentication and authorization protocols.
• Build a near-real-time data aggregation service to collect and unify data across the company services.
• Design metadata, lineage, and governance capabilities that make the serving layer explainable, auditable, and trustworthy.
• Own access control and permission management services, including row and column-level data access with full audit trails.

Skills

Backend engineering

API design

Reliability & latency

Kotlin

Kafka

SQL/NoSQL

AWS/GCP

Kubernetes

Fintech experience

Tools

Docker

Kubernetes

BigQuery

PostgreSQL

dbt

Kafka

Airflow

Python

Kotlin

AWS

GCP

Job description

The company is seeking a Senior Backend Engineer to join the Data Serving team, owning the boundary between raw product data and internal and external consumers, including dashboards, AI agents, and customers accessing their own data.

You will build APIs and the low-latency serving layer, ensure contract stability, and collaborate with Data Engineers and Product teams to deliver scalable, reliable data services.