Windows System Engineer

CompanyiSAM

LocationLondon Area, United Kingdom

Posted At3/12/2026

UK Visa Sponsorship Analytics

Occupation Type

IT business analysts, architects and systems designers

Occupation Code Skill LevelHigher Skilled

Sponsorship Salary Threshold

£54,900 (£28.15 per hour)

Occupation rate applies

Above analytics are generated algorithmically based on job titles and may not always be the same as the company's job classification. You can also check detailed occupation eligibility, and salary criteria on our UK Visa Eligible Occupations & Salary Thresholds page.

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Description

About iSAM

iSAM is an innovative, financial technology firm specialising in quantitative trading, compromised of iSAM Funds and iSAM Securities.

iSAM Securities regulated by the FCA, SFC, and CIMA registered, is a leading algorithmic trading firm and trusted electronic market maker, providing liquidity, technology and prime services to institutional clients and trading venues globally. The firm offers full-service prime brokerage and execution via its cutting-edge proprietary technology, as well as market leading analytics, cleared through the group’s bank Prime Brokers.

iSAM Funds is an alternative asset manager specialising in systematic investing. Each strategy is unique, provides a specialist quantitative approach and is designed to deliver highly diversifying absolute returns for institutional portfolios.

Please note this position is on-site.

The Role

We are seeking an ambitious, enthusiastic, and highly motivated Windows Systems Engineer to join our dynamic Infrastructure team at our London office. As we have experienced significant growth over the past 5 years, our technology needs to scale accordingly to support this expansion. We are currently at an exciting inflection point as our business expands horizontally into other asset classes, presenting new challenges for our technology platform and Infrastructure team. To tackle these challenges, automation plays a crucial role in our strategy, enabling us to rapidly deliver solutions and overcome obstacles. The ideal candidate will have 5+ years of experience in a Windows-based role, demonstrate a strong preference for automation over GUI-driven administration, and be comfortable using PowerShell alongside infrastructure-as-code and configuration management tools such as Terraform and Ansible

to build, configure, and manage scalable, repeatable environments.

They must be a proactive self-starter, capable of taking initiative, displaying natural curiosity, and possessing the skills to continuously identify areas for improvement. By implementing scalable solutions through automation, they will contribute to enhancing our efficiency.

A role built for infrastructure pros who enjoy hands-on Windows administration, scripting, and keeping mission-critical systems secure, stable, and scalable. This opportunity lets you manage enterprise Windows environments, strengthen your automation skills, and make your mark supporting secure, high-performance infrastructure.

Key Responsibilities:

Extensive expertise in the Windows stack, encompassing AD design, GPOs, DFS, DNS, DHCP, and other related components.
Strong proficiency in PowerShell scripting for automating tasks and operational processes, complemented by hands-on experience using Ansible for configuration management, including bare-metal server builds and ongoing configuration using Ansible Galaxy roles

where appropriate.

Proven experience in managing VMware ESX clusters, ensuring optimal performance, scalability, and resource allocation.

Strong experience using Terraform to define, provision, and manage infrastructure-as-code, including AWS EC2 provisioning, and managing EC2 instances post-deployment using AWS Systems Manager (Session Manager, Patch Manager, Automation).

Hands-on experience designing, implementing, and operating server backup and recovery solutions using Veeam, ensuring data protection, recoverability, and compliance with business requirements.

Solid understanding of networking technologies, enabling seamless integration and effective troubleshooting within complex environments.

Possesses a security-first mindset, consistently upholding security standards across the infrastructure and confident in challenging conventional practices when improvements can

be made.

Demonstrates a strong appetite for continuous learning, proactively identifying opportunities for improvement and professional growth.

Capable of translating ideas and concepts into actionable plans, collaborating effectively with cross-functional teams to drive successful implementation.

Key Skills & Experience:

Extensive expertise in the Windows stack, encompassing AD design, GPOs, DFS, DNS, DHCP, and other related components.
Proficiency in PowerShell scripting is crucial for effectively automating tasks and processes.
Proven experience in managing VMWare ESX clusters, ensuring optimal performance and resource allocation.
Strong understanding of networking technologies, enabling seamless integration and troubleshooting within complex environments.
Possesses a security-first mindset, diligently upholding security standards throughout the infrastructure and unafraid to challenge conventional practices.
Demonstrates a keen appetite for learning and consistently identifies areas for improvement and growth.
Capable of translating ideas or concepts into actionable plans, collaborating with cross-functional teams as necessary to drive successful implementation.