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Site Reliability Engineer | £65,000–£5,000 DOE | Hybrid (Bristol-based, occasional site visits)
Clearance: Must be eligible for DV Clearance

Founded in 2019 by engineers solving complex cross-domain problems for government organisations, TwinStream delivers technical excellence and exceptional service to high-profile clients. Our teams work both on-site and remotely, supporting mission-critical systems where performance and reliability are paramount.

The Site Reliability Engineer Role:

We are seeking a Site Reliability Engineer (SRE) to ensure the availability, performance, and cost-effectiveness of our cloud and on-prem services. You will collaborate with software engineers and system administrators to improve observability, reduce downtime, and proactively mitigate reliability risks across a growing portfolio of services.

Key Responsibilities of the Site Reliability Engineer:

• Improve reliability and performance across multiple subsystems.
• Automate manual tasks and eliminate unnecessary alerts.
• Enhance monitoring capabilities to identify and resolve issues before they impact users.
• Support and optimise CI/CD pipelines and cloud infrastructure.
• Research and evaluate new tools to influence build-vs-buy decisions.
• Contribute to technical innovation across diverse stacks and environments.

What We’re Looking For:

• Experience with configuration management tools (e.g., Ansible, Chef).
• Proficiency with Terraform, Docker, and container orchestration (Kubernetes, OpenShift, or similar).
• Hands-on experience with CI/CD tools (Jenkins or equivalent).
• Knowledge of monitoring solutions (Prometheus, Grafana, InfluxDB).
• Familiarity with MQ messaging (RabbitMQ or similar).
• Linux administration, scripting, and network security protocols.
• Experience with cloud services (preferably AWS – EC2, RDS, S3, Lambda).

Desirable: Experience coding in Java, Go, or Python; cross-domain technologies; observability patterns; and service management environments.

Why Join TwinStream?

• Salary: £65, 0–£9 000 (DOE & clearance level)
• Pension: 8% employer contribution
• Private Healthcare: Includes dental & optical cover for you & your family
• Learning & Development: ,000 annual training budget
• Flexible Working: Hybrid & family-friendly culture
• Additional Perks: EV leasing scheme, 25 days’ holiday + bank holidays, life assurance, cycle-to-work scheme, and team events

Ready to Shape the Future of Mission-Critical Systems?

Apply now and join a team where innovation, reliability, and technical excellence drive everything we do.

As a Site Reliability Engineer (SRE) at Trade Nation, you will be part of a dynamic and collaborative team that ensures the reliability, availability, and performance of our web services and applications. You will work closely with developers, operations, and product teams to design, build, and maintain scalable, secure, and efficient systems. You will also monitor, troubleshoot, and resolve issues that affect the user experience and the business objectives.

We are Trade Nation. We help our customers power up their trading through killer insights, transparent costs, and fairer ways to trade. We’re innovators, and proud of it. And we’ve grown a lot in our decade as a market-leading low-cost trading powerhouse. Our reach is global through our teams in the UK, Australia, South Africa, Seychelles and The Bahamas.

Founded on transparency, forged in trust and powered by people, we’re committed to empowering our customers to outperform the markets. How? By minimising expenses and harnessing technology to prioritise the lowest trading costs.

But enough about us. Let’s hear about you.

You’re something special. You pride yourself on being unique and bringing your own history to the table – finding solutions to daily challenges in a way that can’t be done by anyone else. Maybe you talk a big game, maybe you don’t. The important thing is that you do what you say and follow through to see every customer thrive.

You don’t play with the bumpers up. That means breaking out of your lane when needed to help others – or forging your own completely. Every problem is our problem and that’s how you see it too. Because Trade Nation’s people have a shared vision, and you want to be part of making it a reality.

You know when to take the right sort of risks, the ones that push you to be better. You’re not afraid to try, fail, and then try harder. But don’t worry, you’ll have all the support you need to thrive with us at Trade Nation, and we can’t wait to enable you to learn and grow.

Ready to roll up your sleeves and get stuck in?

We have each other’s backs

There when we need each other most

 We challenge each other

Be more creative, more curious, more bold

We thrive together

Taking our work to the next level

We form strong bonds

Through team building and social events

We don’t judge

Instead, we teach and are open to learning

We step up

Taking ownership and supporting each other to do the same

• Design, implement, and maintain scalable and reliable systems.
• Monitor system performance and troubleshoot issues to ensure high availability and reliability.
• Develop and maintain automation tools to streamline operations and reduce manual intervention.
• Collaborate with development teams to ensure new features and services are designed with reliability in mind.
• Implement and manage monitoring, alerting, and logging systems.
• Conduct root cause analysis of incidents and implement corrective actions to prevent recurrence.
• Participate in on-call rotations to provide support for critical systems.
• Continuously improve system performance, reliability, and scalability through proactive measures and best practices.

Requirements

• A bachelor's degree in computer science, engineering, or a related field, or equivalent work experience. 

• At least three years of experience in Site Reliability Engineering, DevOps, or similar roles. 

• Proficiency in JavaScript and ideally React. 

• Experience with cloud platforms, such as AWS, GCP, or Azure, and related technologies, such as Kubernetes, Docker, Terraform, or CloudFormation. 

• Experience with monitoring and observability tools, such as Prometheus, Grafana, Loki, or Sentry. 

• Experience with troubleshooting and debugging tools, such as Wireshark, tcpdump, or gdb. 

• Strong knowledge of web protocols, such as HTTP, TCP, UDP, DNS, and TLS. 

• Strong communication and collaboration skills. 

• Passion for learning new technologies and solving complex problems. 

Benefits

• Competitive salary, and discretionary annual bonus.
• Private healthcare.
• Life Insurance, Critical Illness & Income Protection cover.
• Active Lifestyle allowance.
• Annual leave above minimum entitlement.
• Cycle to work scheme.
• Up to 3 weeks allowance to work in any location.

Gizmo is an AI startup on a mission to make learning so easy that anyone can learn anything. We're building Duolingo for anything - a platform that uses gamification and social mechanics to make learning fun.  

With over 1 million monthly active users and $4M in annual recurring revenue, we’re already one of the fastest-growing startups in the UK. Backed by leading investors, we recently raised $22M in Series A funding to accelerate our vision of helping 1 billion people learn.

Role Overview
Reporting to the CTO, you will own capacity, performance and reliability for Gizmo’s full-stack platform as daily traffic climbs from hundreds of thousands to millions of users. You’ll write code across the stack, but your charter is classic SRE: defend SLOs , eliminate toil , and raise the ceiling on scale before it becomes a hard limit.

Key Responsibilities

• Define SLIs/SLOs for latency, availability and error rate; codify error budgets and partner with product teams on trade-offs.
• Perform load-testing, capacity modelling and up-front scalability design for PostgreSQL, OpenSearch, Redis, Hasura and CF Workers; produce data-driven scaling plans.
• Extend metrics, structured logging and tracing; establish alert rules that page only on user-visible impact; build actionable runbooks .
• Join the on-call rotation, lead blameless post-mortems, drive remediation work to closure and track MTTR/MTBF improvements.
• Automate repetitive ops on Kubernetes and CI/CD; keep “toil” <50 % of your time by pushing fixes into code.
• Coach full-stack engineers on query optimisation, schema design and back-pressure techniques; document patterns and anti-patterns by creating an SRE playbook

Requirements

• Hands-on scale experience : you have run relational stores at 100 k+ TPS or 1 M+ concurrent users (e.g., multi-tenant PostgreSQL, sharded MySQL).
• Strong backend fundamentals around concurrency, caching, indexing and distributed systems trade-offs.
• Proven track record of setting SLOs, building dashboards (Prometheus/Grafana, OpenTelemetry, etc.) and tuning alerts.
• Comfort with Kubernetes , IaC and cloud-native patterns; can debug from network to application layer.
• Self-starter with a maker mindset. We’re looking for ex-founders or individuals with start-up experience. 
• Start-up bias for action: you prioritise high-leverage fixes, ship iteratively and own outcomes end-to-end.
• Collaborative and feedback-driven; you welcome post-mortem culture and continuous improvement.
• Driven by impact - you prioritise work that moves the needle!

Nice-to-haves: experience with Hasura internals, Cloudflare Workers edge optimisation, or operating OpenSearch at scale.

Benefits

• Highly competitive salary.
• You'll own a piece of what you're building - equity included.
• Hybrid working model with 4 days in our East London office, ideally located between Shoreditch High Street, Old Street, and Liverpool Street stations.
• The opportunity to become one of the earliest employees in one of the UK’s fastest-growing startups.
• Private health insurance

About Us

Commify has transformed over the last decade under Private Equity ownership, operating in 9 countries including the UK, France, Spain, Italy, Romania, Germany, Netherlands, Australia, and the USA. Our mission is to make business communication brilliant through our extensive range of products that include SMS, WhatsApp, Email, and more. Serving over 70,000 businesses worldwide, we send more than 5 billion communications annually.

As we look to expand our impressive product portfolio, we recognize that our greatest asset is our people. Join us and be part of our success story!

Role Summary

In the role of Site Reliability Engineer at Commify, you will be an integral part of our SRE team. Your focus will be on ensuring that our products and platforms perform at their best, understanding how our software interacts with both physical and Cloud infrastructure to deliver exceptional messaging solutions.

Key responsibilities include:

• Maintaining high levels of system performance through monitoring and performance tuning
• Implementing scalability and fault tolerance
• Automating processes and improving operational efficiencies
• Troubleshooting application and middleware challenges
• Collaborating with engineering teams to support high-throughput production environments
• Building and maintaining robust deployment pipelines

Requirements

What essentials are we looking for?

• Proficiency with Microsoft Azure
• Strong expertise in Terraform, App Services, and Kubernetes
• Fluent in both written and spoken English
• A genuine passion for reliability in systems
• Experience in creating and modifying Terraform deployments
• Prior experience in an operations role, ideally as a Site Reliability Engineer
• Ability to work cross-functionally, take ownership of tasks, and prioritize effectively
• Excellent communication and collaboration skills
• Experience with monitoring solutions (e.g., Datadog, Azure Application Insights, Log Analytics)
• Programming/scripting skills for automation (favoring PowerShell, but also comfortable with Bash, C#, Ruby, or Python)
• Experience with web-based applications

It's desirable for you to have:

• Familiarity with Azure DevOps pipelines
• Experience with Microsoft Server Operating Systems
• Understanding of service level objectives and operational requirements for cloud-based solutions
• Comprehensive knowledge of Microsoft Azure Cloud offerings (especially in PaaS)
• Experience with tools such as Terraform, Ansible, VSTS, ARM, Puppet, Chef, Jenkins, ELK, and Grafana
• Understanding of DNS, Load Balancer configuration, Active Directory, and network infrastructure in the cloud
• Experience in agile environments and methodologies including TDD, Scrum, or Kanban
• Knowledge of monitoring and alerting systems for microservice architectures
• Applied knowledge of cloud security best practices

Benefits

• Competitive Salary (£65 - 75,000)

• Company bonus scheme
• Comprehensive healthcare cash plan
• A generous 27 days of annual leave in addition to Bank Holidays
• 2 Wellbeing leave days and 2 days dedicated to giving back to your community
• Enjoy your birthday off!
• Employer pension contribution at 5%
• Death in service benefit (4 times your salary)
• Annual award recognition
• Fun monthly and quarterly social events
• Opportunities for training and professional development
• Flexible hybrid working arrangements

ABOUT THE COMPANY

Infleqtion is a global quantum technology company solving the world’s most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables “quantum everywhere” through our ecosystem of devices and platforms. We are recruiting for a Site Reliability Engineer with DevOps skills for our quantum computing platform.   

LOCATION

Infleqtion has offices in the USA, United Kingdom and Australia. This is a full-time position split between our Kidlington, Oxford office and the National Quantum Computing Centre, Harwell. Our flexible working policy enables all full-time employees to work up to 2 days a week from home if work permits.  Candidate will need to be able to travel independently to these locations, as required. 

POSITION SUMMARY

As part of our strategy for growth at Infleqtion UK, we are expanding our engineering team and recruiting a Site Reliability Engineer with DevOps skills. 

For this role, you will bring a mix of technical skills, problem-solving ability and effective communication, playing a pivotal role in operational reliability and code velocity for our quantum research and device development. 

This role involves a combination of network management, server administration, and proactive involvement in our continuous integration and deployment processes. The successful candidate will ideally possess a solid technical background in both systems engineering and software development. 

JOB RESPONSIBILITIES

• Network Management: Design, implement, and manage robust networks, including configuring switches and managing network-connected devices. 

• Software Deployment: Manage Docker containers and orchestrate CI/CD pipelines for efficient software deployment and updates. 

• Infrastructure as code: Design, develop, and maintain IaC solutions and implement CI/CD pipelines to automate deployment processes. 

• Collaboration and Documentation: Collaborate with both software developers and hardware engineers in a lab environment, documenting processes and system configurations for ongoing projects. 

• Developing Standard Operating Procedures: Working with a variety of users and software engineers to implement and develop standard operating procedures for software deployments and system parameter updates. 

• Proactive Problem-Solving Skills:  Integrating complex systems that include embedded boards, computer systems, and hardware interfaces. Your role will focus on seamlessly coordinating these components to ensure the system is consistently operational and optimised. 

• 'System-down' planning and response. Own system management and coordinate response to efficiently maintain high up-times. Plan and implement system backup policies to ensure swift recovery. 

Requirements

• Excellent understanding of networking technologies, connecting computers and embedded devices 

• Proficiency with: 

• Deployment and configuration management framework e.g. Ansible 

• Linux systems 

• Bash scripting 

• Docker and/or Kubernetes 

• Git and version control-centric workflows 

• Good collaboration skills, able to work in a team environment where engagement and participation are an expected part of successful job performance. 

Experience 

• A minimum of 2 years’ experience working in related engineering field. 

• Proven experience working with complex systems consisting of a number of networked nodes, and including embedded systems (such as raspberry Pi, IoT devices). 

• Professional-level verbal and written communication skills, able to effectively share information with technical and non-technical staff. 

Qualifications: 

• Bachelor’s degree in computer science, engineering, or other related field, (or equivalent), or extensive experience. 

• Baseline Personnel Security Standard (BPSS) required (we will arrange for successful candidate). 

Desirable: 

• Experience with ARTIQ systems, or controlling hardware via python API. 

• Experience working with production grade systems. 

• Python, developing & maintaining code, managing packages and dependencies. 

• A background/interest in Quantum Physics/Quantum computing. 

Benefits

In addition to your base compensation, we offer a generous Total Rewards program which includes: 

• Competitive salary 

• Unlimited PTO 

• Generous company pension contribution 

• Cycle to work and Technology schemes 

• BUPA medical insurance upon successful completion of probationary period 

• Incentive Stock Option Plan 

Opportunity

This is an opportunity for a software professional to take a key role in ensuring seamless and reliable access to our Quantum Computers for a global audience. This role would be an ideal opportunity for someone with a strong Linux system administration or DevOps background to make the move into their first Site Reliability Engineer role.

The successful candidate will join a dynamic and supportive team and be empowered to design & develop new tools and automation processes that streamline operations and enhance system reliability  in one of the most cutting edge areas of the technology sector. 

This is not a 9-5 role and will require the post holder to be part of an  on-call rota to ensure we provide 24hr support.

Remuneration + Benefits

• £60-70k per annum
• Private medical insurance
• Group life and group income protection
• Gym and wellness benefits
• EAP cash plan
• Cycle to work scheme
• 25 days holiday
• Pension
• Employee Stock Ownership Plan (ESOP)
• Hybrid working

The Role

As a Site Reliability Engineer, you will be focusing on building and operating  reliable systems and services that ensure high availability, resilience, and scalability for our global network for Quantum Computers. You will also be responsible for monitoring, diagnosing and controlling distributed production environments to avoid manual intervention, while ensuring compliance with high security standards and regulations. 

In this role you will solve complex problems related to infrastructure, cloud services & quantum compilation processes, also build automation to avoid manual intervention and prevent problem recurrences. You will actively improve our operation capabilities and hot-fix issues autonomously wherever possible and be part of a support-system, enabling round-the-clock highly responsive support. You will build an outstanding code-level knowledge of all our production products and will be able to work in and out of these teams, steering these products for observability and reliable operations.

This role would be suited either to someone with SRE experience or an experienced Linux/ DevOps / Cloud engineer interested in moving into an SRE role.

• Ensuring high security standards
• Maintain scalability and availability of our QCaaS system
• Improving technical readiness levels
• Be active on development teams
• Building and operating operation systems
• Monitoring and diagnosing issues
• Testing software in development (including destructive testing)
• Performing roll-backs of software when issues arise.
• Solve complex problems related to infrastructure, cloud services & quantum compilation processes

Skills + experience

Required Skills and experience

• DevOps Engineering experience
• Software Developer/ Engineering experience
• Maintenance of cloud infrastructure
• Relevant commercial experience

• Experience in Docker/Kubernetes and Azure/AWS
• Strong knowledge of GitHub CI/CD process for Python applications
• Strong knowledge database such as Postgres and PL/SQL
• Proficient with commonly used networking protocols such as TCP/IP, HTTP
• Technical communicator
• Strong troubleshooting and performance tuning skills.
• Autonomous worker, with the confidence to take on tasks when the rest of the team is unavailable e.g. outside office hours
• Experience in Automation of testing / monitoring tools
• Team player

Desired Skills

• Experience managing on-premises environments would be highly beneficial
• Experience developing new tools from the ground up
• Experience of on-call positions
• Degree in related field (Computing, numerical, scientific)

Research has shown that women are less likely than men to apply for this role if they do not have solid experience in 100% of these areas. Please know that this list is indicative and that we would still love to hear from you even if you feel you only are a 75% match. Skills can be learnt, diversity cannot.

Our Company

At OQC, we see a brighter future for all, enabled by quantum.

Together we are pioneering cutting-edge quantum computers that unlock transformative discoveries, from advancing drug modelling to revolutionising battery technology. Our mission is to put quantum in the hands of humanity, empowering customers to discover new commercial and scientific frontiers.

When you join OQC, you become part of a diverse team of innovators, creators, and problem solvers. We bring together some of the brightest minds in quantum physics, nanotechnologies, hardware, software and commercial operations. Each team member brings a unique skill set and are united by our values, which guide us in everything we do - how we work, how we collaborate and how we shape the future of our industry.

Are you ready to help us build this future?

APPLY NOW!

Please use the link provided to apply for the role of Site Reliability Engineer. To aid your application, it will be beneficial to provide us with a cover letter outlining why you think you would be a good fit for the role and what attracts you to OQC. We look forward to hearing from you!

At OQC we are not just hoping you’ll fit in our culture. We aspire to thrive, as a company and as people, thanks to your diversity of thought and background. We are proud to be an equal opportunity employer and we are committed to providing our team members with a work environment free from discrimination, where everyone is treated with respect. Our employment decisions are based on business needs, talent and merit and all our colleagues share in the responsibility for fulfilling our commitment to diversity. We look forward to meeting you!