Platform Site Reliability Engineer - Member of Technical Staff
Callosum —London
- £101,000 - £192,000 a year
- Full-time
- AI
Quick apply
Site Reliability Engineer
Trainline —London
- £55,000 - £63,000 a year
- Full-time
- Hybrid work
- AWS
- Scripting
- Linux
HPC Infrastructure Site Reliability Engineer
Radiant —London
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Master's degree
Quick apply
Site Reliability Engineer (SRE)
Reward Gateway —London
- £60,000 - £65,000 a year
- Full-time
- Hybrid work
- DevOps
- SQL
- AWS
- Employee discount
Quick apply
12d
Site Reliability Engineer- London
FDM Group —London
- Hybrid work
- Azure
- DevOps
- AWS
- Annual leave
3d
Site Reliability Engineer
Axon —London
- Azure
- Java
- AWS
- Annual leave
Quick apply
Engineer - Site Reliability
CBOE —London
- Full-time
- Azure
- Computer Science
- Engineering
Site Reliability Engineer - SRE Fleet
Cisco Systems —London
- Full-time
- DevOps
- AWS
- Linux
3d
Senior Site Reliability Engineer - Python
Department for Business and Trade —London
- £63,824 - £83,778 a year
- Part-time
- Hybrid work
- Azure
- AWS
- Presentation skills
CDS Clear IT Site Reliability Engineer
London Stock Exchange Group —London
- Full-time
- English
- IT
2d
IAM Secrets Management Engineering - SRE Platform Engineer - VP - London
Goldman Sachs —London
- Full-time
- Computer Science
- DevOps
- Engineering
- Employee assistance programme
Platform Engineer
Secret Intelligence Service —London
- £66,332 a year
- Part-time
- DevOps
- Java
- Software development
- Annual leave
- Flexitime
Sr. Observability Engineer
Universal Music Group —London
- Full-time
- Azure
- Data analysis skills
- AWS
SRE Squad Lead
Department for Business and Trade —London
- £63,824 - £83,778 a year
- Part-time
- Hybrid work
- Azure
- DevOps
- AWS
Principal Systems Engineer
Harris Computer Systems —London
- Full-time
- Remote
- Azure
- Computer Science
- Bachelor's degree
Principal Systems Engineer
Altera Digital Health Inc. —London
- Full-time
- Remote
- Azure
- Computer Science
- Bachelor's degree
DevOps Engineer, Studios
IMG —London
- Weekend availability
- Hybrid work
- Azure
- DevOps
- AWS
2d
DevOps Engineer
BAE Systems —London
- Part-time
- Hybrid work
- DevOps
- Scripting
- Software development
Principal DevOps Engineer
Catapult Sports —London
- DevOps
- AWS
- Leadership
Quick apply
Staff SRE, Ads
Reddit —London
- Remote
- Machine learning
- Linux
- Communication skills
- Annual leave
Quick apply

I want to receive the latest job alerts for site reliability engineer in se23 2uh

By signing in to your account, you agree to SimplyHired's Terms of Service and consent to our Cookie and Privacy Policy.

Explore jobs in more locations

site reliability engineer jobs near se23 2uh

Platform Site Reliability Engineer - Member of Technical Staff

Callosum
London

Quick apply

Job details

Full-time
£101,000 - £192,000 a year

Benefits

UK visa sponsorship
Private medical insurance

Qualifications

Incident response
AI

Full job description

About Us

The last era of AI scaled on a single bet: bigger models, more identical chips, more data. As problems grow more complex and the requirements of intelligence more diverse, that bet is breaking down. Real-world problems are heterogeneous: no single model or chip can solve them alone. The next era of AI requires heterogeneity at the infrastructure level - diverse models on diverse chips, each with distinct strengths, co-evolving into systems of capability that move the Pareto frontier of what is possible. That's what we are building.

Callosum is the Intelligent Systems Company. We started from questioning what actually creates intelligence. We believe there is no single answer, but rather a system-level solution. We co-evolve models, workflows, and silicon together to show that intelligence does not come from a single component, but it emerges from the diversity of co-optimised mechanisms working together and aware of each other. Heterogeneity will define the next era of compute, and is a principle that holds in biological, neuronal, and economic systems alike.

In early 2026 we launched with results showing orders of magnitude improvements in performance, and this is only the beginning. Agentic AI is the future of how intelligence is deployed: multi-step, long-horizon, and operating in changing environments. These systems are inherently heterogeneous, and can only be as powerful as the infrastructure that runs them.

We are engineers and scientists based in London, working together across the full depth of the stack. We are curious, intellectually honest, and building what doesn't exist yet. If you thrive on uncharted territory and are energised by the scale of the challenge, we'd love to hear from you.

About the Role

Our platform is the production system our customers route real traffic through. When it degrades, their product degrades. You will own its operational health end-to-end: SLOs, observability, incident response, deployment discipline, and capacity planning across heterogeneous compute backends. As the platform scales to millions of concurrent requests across heterogeneous compute, the work shifts from building the operational foundation to defending it under conditions most teams never encounter.

You'll define "production-grade" means for a platform at the centre of a fast-growing company, and own it end to end. The reliability practice is yours to build. You will work closely with the platform team, setting the technical direction. You will work closely with the hardware and orchestration teams to expose heterogeneous backends reliably through the platform.

Who You'll Build

Service-level objectives, monitoring, alerting, and observability
On-call and incident response: runbooks, escalation, blameless postmortems, and follow-through
Capacity planning and the operational side of running across heterogeneous compute backends

What You Bring

Strong SRE or production-engineering background running customer-facing systems at scale
Fluency with modern operational tooling: observability stacks, container orchestration, infrastructure-as-code, CI/CD
Experience owning incident response and driving reliability improvements.
Compliance execution experience

What Sets You Apart

Open-source contributions to relevant infrastructure, or production systems whose scale and complexity you can speak to in detail
Early-stage and AI-native company experience

What We Offer

Competitive Salary, determined by skills and experience
Equity & Ownership
Private healthcare
We offer Visa sponsorship and relocation benefits to hire the best in the world
We work in person at our London office. You'll have the tools, space and setup to do your best work, and if you have specific needs, just tell us

We're committed to building an inclusive workplace where everyone feels welcome, and believe in equal opportunities for all.

Compensation Range: £101K - £192K

Quick apply

Refine Your Search

site reliability engineer jobs in se23 2uh

Platform Site Reliability Engineer - Member of Technical Staff

Site Reliability Engineer

HPC Infrastructure Site Reliability Engineer

Site Reliability Engineer (SRE)

Site Reliability Engineer- London

Site Reliability Engineer

Engineer - Site Reliability

Site Reliability Engineer - SRE Fleet

Senior Site Reliability Engineer - Python

CDS Clear IT Site Reliability Engineer

IAM Secrets Management Engineering - SRE Platform Engineer - VP - London

Platform Engineer

Sr. Observability Engineer

SRE Squad Lead

Principal Systems Engineer

Principal Systems Engineer

DevOps Engineer, Studios

DevOps Engineer

Principal DevOps Engineer

Staff SRE, Ads

I want to receive the latest job alerts for site reliability engineer in se23 2uh

Related Searches

Explore jobs in more locations

About Us

About the Role

Who You'll Build

What You Bring

What Sets You Apart

What We Offer

Jobseeker tools

Employer Tools

Browse

Stay Connected