Senior Software Engineer

Location: Paddington

Senior Software Engineer

Stealth AI Startup | London | Hybrid

We’re hiring for a fast-growing AI startup building a cloud-native analytics platform that transforms large volumes of LLM output into structured, queryable intelligence for businesses and brands.

The platform is fully AWS-native, heavily event-driven, and built for scale from day one. The team actively uses AI agents and automation across both engineering and product workflows, not as a gimmick, but as a core operating principle.

We’re looking for a Senior Software Engineer to help shape, build, and run the core cloud and data foundation of the platform.

What You’ll Be Doing

* 4+ years of experience

* You’ll take ownership of significant parts of the cloud and data layer, including:

* Designing and operating AWS infrastructure (ECS Fargate, Lambda, Step Functions, Event Bridge, S3, Athena, Dynamo

DB)

* Building robust ETL / ELT pipelines that transform raw LLM outputs into structured, analytics-ready datasets

* Designing event-driven workflows and distributed processing systems

* Managing containerised services using Docker and ECS

* Implementing CI/CD pipelines and infrastructure-as-code practices

* Establishing monitoring, alerting, and reliability standards across production workloads

* Optimising system performance, cost efficiency, and scalability

* Embedding security, IAM design, and least-privilege principles from the ground up

* Actively leveraging AI agents and automation tools to improve engineering workflows and system design

* This is a hands-on role. You’ll be designing, building, debugging, and shipping. Not just overseeing.

What We’re Looking For

* Strong production experience with AWS (especially ECS, Lambda, Step Functions, S3, Event Bridge)

* Solid Docker and container-native deployment experience

* Python for data processing, automation, or backend services

* Experience building and maintaining data pipelines or data lake architectures

* Infrastructure-as-code (Terraform, CDK, or Cloud Formation)

* CI/CD and production engineering mindset

* Comfort owning distributed systems and running real workloads in production

* Genuine curiosity about AI tools, LLM APIs, and automation-driven engineering

Why Join

* Real ownership of core cloud and data architecture

* Work at the intersection of cloud infrastructure, data engineering, and applied AI

* Modern AWS-native, event-driven system with meaningful scale

* Small, senior team operating in a high-trust, low-bureaucracy environment

* Direct impact on a fast-growing AI product