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Senior Software Engineer

NexGen Cloud · UK - Remote

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Software Development UK - Remote Posted Apr 25, 2026

Senior Software Engineer – AI Studio

Location: UK (Remote)

Department: Software Engineering

Reporting to: Engineering Manager

ABOUT NEXGEN CLOUD:

NexGen Cloud is the company behind Hyperstack, a full-stack AI cloud serving tens of thousands of customers from AI researchers to enterprises running the world's most compute-intensive workloads. We deliver on-demand and private GPU infrastructure to teams who treat performance as a requirement, not a feature.

We're a tight-knit, fast-moving team working at the cutting edge of AI cloud infrastructure. We practice what we preach, equipping our people with AI at every level so we can solve harder problems, ship faster, and keep raising the bar for what enterprise GPU infrastructure looks like.

THE ROLE: Senior Software Engineer – AI Studio

This role exists because AI Studio — Hyperstack's platform for fine-tuning, evaluating, and deploying generative AI workloads — is growing fast and needs engineers who can take real ownership of the systems behind it. You'll design and build the core backend services, APIs, and user-facing features that orchestrate model training, evaluation, and deployment at scale, and contribute to architectural decisions that shape how the platform evolves.

This is a role for someone who takes accountability for production systems, thinks carefully about architecture, and wants to see the direct impact of their work on a platform used by thousands of AI teams.

WHAT YOU'LL BE DOING:

Rather than a long checklist, here's what success in this role looks like:

Design, build, and evolve core backend services and platform components — making architectural decisions that support scalability, reliability, and long-term maintainability
Develop and maintain both backend services and user-facing interfaces that support AI workflows including model training, evaluation, and deployment
Improve system observability, diagnose production issues, and optimise performance to keep the platform running reliably at scale
Write clean, well-tested code and contribute to code reviews — actively helping raise engineering standards across the team
Work closely with Product, Design, and Engineering to translate complex requirements into production-ready systems and features
Support and mentor other engineers through design discussions, collaboration, and code reviews
Identify opportunities to improve architecture, tooling, and development processes that enhance platform quality and developer productivity

ABOUT YOU:

We're more interested in how you think and work than in a perfect CV. You'll likely bring a combination of the following:

Essential

Strong experience designing and operating production backend systems and APIs
Strong proficiency in Python and backend frameworks such as Flask
Experience building full-stack applications using modern frameworks such as Next.js
Experience designing scalable distributed systems and platform architectures
Solid understanding of API design, service boundaries, and data systems — SQL and NoSQL
Experience with Git, CI/CD pipelines, Docker, and Kubernetes
Proven experience managing production systems including monitoring, debugging, and incident response

Nice to Have

Experience working with LLMs, generative AI platforms, or model orchestration systems
Exposure to model training, fine-tuning, inference, or evaluation pipelines
Experience with GPU-intensive workloads or distributed computing systems
Experience building developer platforms, experimentation tooling, or internal developer tools
Contributions to open-source projects or AI/ML tooling

WHAT WE OFFER:

Competitive salary and annual discretionary bonus scheme
Employee wellbeing benefits
25 days of holiday, plus public holidays
Flexible working arrangements (remote or hybrid, depending on role and location)
Real ownership and autonomy, with the trust to take initiative and experiment
The opportunity to make a visible, meaningful impact as we scale
Clear career progression and growth opportunities in a fast-growing company
A collaborative, international culture built on trust, transparency, and ownership
The chance to help shape NexGen Cloud's team, culture, and future alongside ambitious, mission-driven colleagues

MORE INFORMATION

Head over to our NexGen Cloud careers page to view current openings and follow us on LinkedIn and X to learn more about our journey, newest releases and hear exciting news in the neocloud space.

Ready to apply?

Apply to NexGen Cloud

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NexGen Cloud

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NE

HPC Cluster Architect

NexGen Cloud · UK - Remote

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Technology UK - Remote Posted Apr 25, 2026

HPC Cluster Architect

Location: UK (Remote)

Department: Infrastructure

Reporting to: Head of Infrastructure

ABOUT NEXGEN CLOUD:

NexGen Cloud is the company behind Hyperstack, a full-stack AI cloud serving tens of thousands of customers from AI researchers to enterprises running the world's most compute-intensive workloads. We deliver on-demand and private GPU infrastructure to teams who treat performance as a requirement, not a feature.

We're a tight-knit, fast-moving team working at the cutting edge of AI cloud infrastructure. We practice what we preach, equipping our people with AI at every level so we can solve harder problems, ship faster, and keep raising the bar for what enterprise GPU infrastructure looks like.

THE ROLE: HPC Cluster Architect

This role exists because NexGen Cloud is winning large-scale dedicated GPU cluster contracts and needs someone who can own the full architecture cycle — from first customer conversation to production deployment. You'll have direct ownership over cluster architecture across compute, networking, storage, and physical design — translating customer requirements into production-ready, commercially optimised GPU deployments.

This is a senior hands-on role for someone who has lived and breathed HPC cluster design and wants to be the technical authority, not one voice in a committee. You'll own designs end-to-end and see them go live.

WHAT YOU'LL BE DOING:

Rather than a long checklist, here's what success in this role looks like:

Own end-to-end cluster architecture for large-scale NVIDIA GPU deployments — from customer requirement through rack layouts, BOM, power and cooling design, to production handover
Design high-performance network fabrics across compute (InfiniBand, RDMA, NVLink/NVSwitch), storage, and WAN — defining topology, oversubscription models, and scaling strategies
Engage directly with OEMs and vendors — validating hardware configurations, reviewing quotes, and ensuring designs are both technically sound and commercially optimised
Provide technical oversight during deployment and bring-up — supporting hardware validation, performance testing, and acting as escalation point for complex integration issues
Act as a senior technical leader across Solutions Architecture, Cloud Engineering, and data centre partners — contributing to standardised reference designs and building out the HPC engineering function

ABOUT YOU:

We're more interested in how you think and work than in a perfect CV. You'll likely bring a combination of the following:

Essential

Proven experience designing and delivering GPU-based HPC or AI clusters at scale — covering the full lifecycle from design through procurement, deployment, and validation
Deep hands-on knowledge of NVIDIA GPU platforms (H100/H200/B-series) and NVIDIA reference architectures
Strong InfiniBand/RDMA design experience — topology, performance tuning, and high-performance Ethernet fabrics
Solid grounding in Linux systems, PCIe topology, NUMA alignment, and server-level performance considerations
Background from an OEM, hyperscaler, neo-cloud, or enterprise/research HPC environment — with demonstrable exposure to the full design-to-deployment lifecycle
Confident engaging with customers, vendors, OEMs, and internal engineering teams as a technical authority — able to translate complex design trade-offs into clear decisions

Nice to Have

Experience with Spectrum-X or next-generation Ethernet fabrics
Prior involvement in large-scale cluster deployments (1,000+ GPUs) and performance benchmarking (NCCL, MLPerf)
Exposure to both air-cooled and liquid-cooled HPC environments, and/or automation/infrastructure-as-code

WHAT WE OFFER:

Competitive salary and annual discretionary bonus scheme
Employee wellbeing benefits
25 days of holiday, plus public holidays
Flexible working arrangements (remote or hybrid, depending on role and location)
Real ownership and autonomy, with the trust to take initiative and experiment
The opportunity to make a visible, meaningful impact as we scale
Clear career progression and growth opportunities in a fast-growing company
A collaborative, international culture built on trust, transparency, and ownership
The chance to help shape NexGen Cloud's team, culture, and future alongside ambitious, mission-driven colleagues

MORE INFORMATION

Head over to our NexGen Cloud careers page to view current openings and follow us on LinkedIn and X to learn more about our journey, newest releases and hear exciting news in the neocloud space.

Ready to apply?

Apply to NexGen Cloud

NE

NexGen Cloud

View all jobs →

NE

Senior Infrastructure Engineer

NexGen Cloud · UK - Remote

Apply now

Infrastructure UK - Remote Posted Apr 25, 2026

Senior Infrastructure Engineer (OpenStack)

Location: UK (Remote)

Department: Infrastructure

Reporting to: Head of Infrastructure

ABOUT NEXGEN CLOUD:

NexGen Cloud is the company behind Hyperstack, a full-stack AI cloud serving tens of thousands of customers from AI researchers to enterprises running the world's most compute-intensive workloads. We deliver on-demand and private GPU infrastructure to teams who treat performance as a requirement, not a feature.

We're a tight-knit, fast-moving team working at the cutting edge of AI cloud infrastructure. We practice what we preach, equipping our people with AI at every level so we can solve harder problems, ship faster, and keep raising the bar for what enterprise GPU infrastructure looks like.

THE ROLE: Senior Infrastructure Engineer (OpenStack)

This role exists because our platform is scaling quickly — and complexity comes with it. As we expand our OpenStack and Kubernetes environments globally, we need engineers who can take real ownership of how the platform is designed, operated, and improved. You'll have direct ownership over business-critical infrastructure that impacts performance, reliability, and customer experience.

This is not a maintenance role. If you like solving hard problems, owning systems end-to-end, and seeing the impact of your work immediately — you'll enjoy this.

WHAT YOU'LL BE DOING:

Rather than a long checklist, here's what success in this role looks like:

Own the design, deployment, and operation of OpenStack and Kubernetes environments — ensuring platform performance, scalability, and resilience for GPU workloads
Build and improve infrastructure using infrastructure-as-code and GitOps practices, driving automation across provisioning, deployment, and operational workflows
Optimise GPU workload scheduling using Kubernetes and NVIDIA tooling, and implement monitoring, logging, and alerting to ensure platform stability
Lead incident response and drive continuous improvement of reliability across the platform
Maintain strong security controls across infrastructure and container layers — RBAC, network policies, and tenant isolation
Work closely with Platform, DevOps, AI, Product, and Support teams to align infrastructure capabilities with customer and platform requirements

ABOUT YOU:

We're more interested in how you think and work than in a perfect CV. You'll likely bring a combination of the following:

Essential

Strong hands-on experience running OpenStack in production environments
Proven experience operating Kubernetes at scale — ideally bare-metal or private cloud
Solid understanding of Linux, networking, and storage systems
Experience with infrastructure automation, CI/CD, and Git-based workflows
Strong ownership mindset — comfortable operating without heavy oversight and able to simplify and scale systems in a fast-moving environment

Nice to Have

Experience integrating Kubernetes with OpenStack
Exposure to GPU infrastructure, HPC, or large-scale compute environments
Familiarity with advanced networking or cloud-native ecosystems
Contributions to open-source projects

WHAT WE OFFER:

Competitive salary and annual discretionary bonus scheme
Employee wellbeing benefits
25 days of holiday, plus public holidays
Flexible working arrangements (remote or hybrid, depending on role and location)
Real ownership and autonomy, with the trust to take initiative and experiment
The opportunity to make a visible, meaningful impact as we scale
Clear career progression and growth opportunities in a fast-growing company
A collaborative, international culture built on trust, transparency, and ownership
The chance to help shape NexGen Cloud's team, culture, and future alongside ambitious, mission-driven colleagues

MORE INFORMATION

Head over to our NexGen Cloud careers page to view current openings and follow us on LinkedIn and X to learn more about our journey, newest releases and hear exciting news in the neocloud space.

Ready to apply?

Apply to NexGen Cloud

NE

NexGen Cloud

View all jobs →

NE

Lead Infrastructure Engineer

NexGen Cloud · UK - Remote

Apply now

Infrastructure UK - Remote Posted Apr 25, 2026

Lead Infrastructure Engineer (OpenStack)

Location: UK (Remote)

Department: Infrastructure

Reporting to: Head of Infrastructure

ABOUT NEXGEN CLOUD:

NexGen Cloud is the company behind Hyperstack, a full-stack AI cloud serving tens of thousands of customers from AI researchers to enterprises running the world's most compute-intensive workloads. We deliver on-demand and private GPU infrastructure to teams who treat performance as a requirement, not a feature.

We're a tight-knit, fast-moving team working at the cutting edge of AI cloud infrastructure. We practice what we preach, equipping our people with AI at every level so we can solve harder problems, ship faster, and keep raising the bar for what enterprise GPU infrastructure looks like.

THE ROLE: Lead Infrastructure Engineer (OpenStack)

This role exists because we are scaling Hyperstack rapidly to meet global demand for GPU-powered infrastructure across AI, ML, and HPC workloads. As our OpenStack and Kubernetes environments grow in complexity, we need strong technical leadership to keep everything stable, scalable, and moving forward. You'll have direct ownership over the performance, reliability, and evolution of our OpenStack and Kubernetes platforms in-region, while leading a small, high-calibre team of engineers.

This is a role for someone who leads from the front — hands-on when needed, but equally comfortable setting direction, making decisions, and holding the bar high.

WHAT YOU'LL BE DOING:

Rather than a long checklist, here's what success in this role looks like:

Own and drive the design, deployment, and operation of OpenStack and Kubernetes clusters optimised for GPU workloads
Lead and develop a team of 4–5 infrastructure engineers, setting clear direction and standards
Build and improve infrastructure through automation — IaC, GitOps, and CI/CD pipelines
Ensure platform reliability through strong monitoring, observability, and incident management practices
Collaborate closely with DevOps, Product, and Support teams to align infrastructure with real-world customer needs
Take ownership of operational governance including incident, problem, and change management
Identify opportunities to simplify, standardise, and scale systems as the platform grows
Communicate clearly with leadership on platform performance, risks, and improvements

ABOUT YOU:

We're more interested in how you think and work than in a perfect CV. You'll likely bring a combination of the following:

Essential

Strong hands-on experience operating OpenStack in production environments
Experience running production-grade Kubernetes clusters — ideally bare-metal or private cloud
Solid Linux, networking, and storage fundamentals with a pragmatic troubleshooting approach
Experience with infrastructure automation, CI/CD, and Git-based workflows
Proven leadership or mentoring experience within infrastructure or platform teams
Experience managing incidents and coordinating response during critical service events
Strong communication skills, particularly translating technical issues for non-technical stakeholders

Nice to Have

Experience integrating Kubernetes with OpenStack
Exposure to GPU infrastructure, HPC, or large-scale compute platforms
Familiarity with advanced networking or cloud-native ecosystems
Contributions to open-source or cloud-native communities

WHAT WE OFFER:

Competitive salary and annual discretionary bonus scheme
Employee wellbeing benefits
25 days of holiday, plus public holidays
Flexible working arrangements (remote or hybrid, depending on role and location)
Real ownership and autonomy, with the trust to take initiative and experiment
The opportunity to make a visible, meaningful impact as we scale
Clear career progression and growth opportunities in a fast-growing company
A collaborative, international culture built on trust, transparency, and ownership
The chance to help shape NexGen Cloud's team, culture, and future alongside ambitious, mission-driven colleagues

MORE INFORMATION

Head over to our NexGen Cloud careers page to view current openings and follow us on LinkedIn and X to learn more about our journey, newest releases and hear exciting news in the neocloud space.

Ready to apply?

Apply to NexGen Cloud

NE

NexGen Cloud

View all jobs →