Platform Site Reliability Engineer - Member of Technical Staff
Callosum —London
- £101,000 - £192,000 a year
- Full-time
- AI
Quick apply
Site Reliability Engineer (SRE)
Reward Gateway —London
- £60,000 - £65,000 a year
- Full-time
- Hybrid work
- DevOps
- SQL
- AWS
- Employee discount
Site Reliability Engineer
Signal AI —London
- £70,000 - £85,000 a year
- Full-time
- Hybrid work
- AWS
- Linux
- Python
Site Reliability Engineer
IRTISH Consulting Pte Ltd —London
- Up to £400 a day
- Temporary
- Java
- Computer networking
- Linux
Quick apply
4d
Site Reliability Engineer- London
FDM Group —London
- Hybrid work
- Azure
- DevOps
- AWS
- Annual leave
10d
Site Reliability Engineer - SRE Fleet
Cisco Systems —London
- Full-time
- DevOps
- AWS
- Linux
10d
Lead Site Reliability Engineer
JPMorganChase —London
- Full-time
- AWS
- Computer networking
- AI
2d
DevOps Engineer / Site Reliability Engineer
Freelancer.com —London
- £70,000 - £100,000 a year
- Full-time
- Azure
- Computer Science
- Engineering
Quick apply
Senior / Lead Site Reliability Engineer
Allwyn UK —Watford
- Hybrid work
- AWS
- Leadership
- Python
- Annual leave
- Employee assistance programme
Quick apply
4d
Site Reliability Engineer, Infrastructure - ThousandEyes
Cisco Systems —London
- Full-time
- Doctoral degree
- Master's degree
- AWS
5d
Senior Cloud Site Reliability Engineer
Nice —London
- Hybrid work
- Java
- AWS
- Scripting
3d
Data Platform Infra Site Reliability Engineer
Apple —London
- Linux
- Python
3d
SRE DevOps Engineer
WTW —Reigate
- Full-time
- Hybrid work
- Azure
- DevOps
- Scripting
- Annual leave
- Employee assistance programme
Camunda DevOps Lead - London, UK - Fulltime - Hyrbrid
Capgemini —London
- DevOps
- AWS
- Leadership
Principal Cloud DevOps Engineer
Entrust —London
- Full-time
- Hybrid work
- DevOps
- AWS
- Scripting
IAM Secrets Management Engineering - SRE Platform Engineer - VP - London
Goldman Sachs —London
- Full-time
- Computer Science
- DevOps
- Engineering
- Employee assistance programme
Principal Systems Engineer
Altera Digital Health Inc. —London
- Full-time
- Remote
- Azure
- Computer Science
- Bachelor's degree
Principal Systems Engineer
Harris Computer Systems —London
- Full-time
- Remote
- Azure
- Computer Science
- Bachelor's degree
DevOps Engineer (Security Cleared)
Solirius Reply —London
- £44,000 - £80,000 a year
- Full-time
- Hybrid work
- Azure
- DevOps
- AWS
- Annual leave
- Employee assistance programme
Quick apply
SRE Engineer
Ricoh —Watford
- Azure
- Bakery
- Scripting

I want to receive the latest job alerts for site reliability engineer in westminster, eng

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 westminster, eng

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 westminster, eng

Platform Site Reliability Engineer - Member of Technical Staff

Site Reliability Engineer (SRE)

Site Reliability Engineer

Site Reliability Engineer

Site Reliability Engineer- London

Site Reliability Engineer - SRE Fleet

Lead Site Reliability Engineer

DevOps Engineer / Site Reliability Engineer

Senior / Lead Site Reliability Engineer

Site Reliability Engineer, Infrastructure - ThousandEyes

Senior Cloud Site Reliability Engineer

Data Platform Infra Site Reliability Engineer

SRE DevOps Engineer

Camunda DevOps Lead - London, UK - Fulltime - Hyrbrid

Principal Cloud DevOps Engineer

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

Principal Systems Engineer

Principal Systems Engineer

DevOps Engineer (Security Cleared)

SRE Engineer

I want to receive the latest job alerts for site reliability engineer in westminster, eng

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