LMAX Group

LMAX Group seeks a Head of Windows Enterprise to oversee the global Windows ecosystem within its organisation. This role involves setting strategic direction, leading a global engineering team, and ensuring the reliability and evolution of all Windows services. Candidates should have deep expertise across the Microsoft ecosystem and experience with cloud technologies. The position offers competitive benefits including 25 days of holiday, a bonus, and comprehensive health coverage.

The Head of Windows Enterprise is accountable for the global Windows ecosystem and the full Microsoft technology stack across LMAX Group. This role sets the strategic direction, leads a high-performing global engineering organisation, and ensures the reliability, security, and evolution of all Windows Enterprise services. You will act as the senior technical authority and final escalation point, but your primary impact will be through strategy, leadership, and driving an automation-first engineering culture that delivers measurable business value. Key Responsibilities 1. Leadership, Strategy & Organisational Impact Define and own the multi-year Windows Enterprise strategy aligned to LMAX Group's cloud-first and M365 vision. Lead and develop a global team spanning 1st, 2nd, and 3rd line engineering, building a culture of ownership, accountability, and collaboration. Engage senior stakeholders across business units to ensure Windows services evolve with organisational needs and deliver an exceptional end-user experience. Own vendor and partner relationships, including strategic technology decisions and procurement. Champion a high-standards culture, where engineering excellence and "doing the right thing" are non-negotiable. 2. Service Ownership & Operational Excellence Own the performance, reliability, and consistency of global end-user computing services. Ensure robust lifecycle management, including patching, compliance, and security across the Windows estate. Act as the senior escalation point for complex or critical issues within the Windows Enterprise environment. Oversee asset and application management, ensuring accurate inventory, effective patching, and operational discipline. 3. Identity, Security & Risk Management Provide leadership across Identity and Access Management, including IAM lifecycle, Azure AD (Entra ID), RBAC, and directory integrations. Partner with Cyber Security to deliver Zero Trust initiatives, conditional access, CASB solutions, and privileged access governance. Ensure all services meet regulatory, audit, and security expectations, consistent with financial services standards. 4. Core Infrastructure & Cloud Services Own the strategy, reliability, and evolution of Microsoft core services, including Active Directory Directory Services (AD DS), Entra ID, Intune, and the full Microsoft 365 stack. Contribute to Azure cloud strategy, supporting IaaS, PaaS, and M365 scalability and modernisation. Maintain and support the AWS EC2 infrastructure underpinning the MT4 and MT5 trading platforms, ensuring stability, performance, and alignment with operational and regulatory requirements. Maintain and evolve business continuity capabilities, including Azure Virtual Desktop (AVD) and Intune-based continuity frameworks. Technical Expertise Deep expertise across the Microsoft ecosystem: Windows Server (2016+), Windows 10/11, Microsoft 365. Strong understanding of Azure products, Azure IAM, hybrid identity, and on-premise AD forest integration. Experience with Cloud Platforms: AWS, Alibaba, Azure. Exposure to Broker Trading systems (MT4/MT5) and FIX protocol is highly advantageous. Automation & Engineering Practices Advanced PowerShell and Azure AD Graph API scripting capability. Experience with Infrastructure-as-Code (Terraform, Ansible) and modern CI/CD engineering approaches. Proficiency with Intune, Defender for Endpoint, BitLocker, AppLocker, and related enterprise Security tooling. Leadership & Personal Attributes Excellent stakeholder management, able to translate technical strategy into business outcomes. A proactive, accountable self-starter with strong ownership and delivery focus. Collaborative, approachable leadership style with experience running follow-the-sun operational models. Qualifications Professional certification such as Microsoft Certified: Azure Administrator or Azure Security Engineer. Demonstrable experience leading and scaling infrastructure teams within complex, regulated environments. Benefits 25 days of holiday Bonus Pension contribution Private medical, dental, and vision coverage Life assurance Critical illness cover Wellness contribution program with access to ClassPass Plumm Platform Five volunteering days Give as You Earn initiative Learning and development programs Electric Vehicle Scheme Cycle to Work Scheme Season Ticket Loan

LMAX Group is looking for a tester for our C++ development team. In this position you can expect to help design and implement automated testing suites as well as conduct exploratory testing of our trading applications. You will also be assisting the development team to ensure that new code is designed with testing in mind. We are looking for testers who are confident in their ability to create tests, both with others and on their own. A finance or trading background is not required. What you will be working on Our code base currently has extensive automated tests from unit test to integration tests and acceptance tests. All our tests run through our CI every 15 minutes and we are looking to maintain and expand this test suite as we create new features. There will also be some time allocated to exploratory testing to try and find elements of the system that are not functioning correctly. Our developers prefer to practice TDD. This is the first Tester hire for the team, so you will be expected to drive the testing strategy to prove functional correctness. Exploratory testing to identify obscure edge cases and complex interactions, both on your own and pairing with developers, is expected to be a significant part of this role. Responsibilities Produce clear, well-structured automated C++ tests Identify, elevate and where possible mitigate potential risks impacting delivery of the team Use pair programming to increase the spread of knowledge and avoid siloing Continuously design and implement new test types that improve the ease of writing tests Investigate our trading system and create failing tests to demonstrate bugs Work with developers to design code with testability in mind Essential Skills / Experience Writing C++ tests using modern C++ on a Linux/UNIX environment Ability to understand business requirements and develop tests to define them Ability to design well documented, simple and elegant tests that are easily maintainable Ability to work independently and with little guidance A finance and/or trading background is not required Desirable Skills / Experience Catch2 Continuous Integration (Jenkins) # Experience with python testing (pytest) Experience with UI testing Knowledge of Websocket, TCP/IP networking. Science or Maths related degree. Benefits 25 daysof holiday Bonus Pension contribution Private medical, dental, and vision coverage Life assurance Critical illness cover Wellness contribution program with access to ClassPass Plumm Platform Five volunteering days Give as You Earn initiative Learning and development programs Electric Vehicle Scheme Cycle to Work Scheme Season Ticket Loan

Overview LMAX is looking for a C++ and Python developer to join our middle-office team. This team works closely with the infrastructure, research and treasury teams. In this position you can expect to take a significant role in the development of our trade reconciliation, back testing framework and trading monitoring. You will be working with the team to design and implement our trading system with a predominant focus on data engineering. We are looking for developers who are confident in their ability to develop software, both with others and on their own. A finance or trading background is not required. What you will be working on Our code base is currently split between C++, a language which the infrastructure team works on, and Python, which is used by the research team for analysis and automation. This role is part of a new team to help bridge the gap between the two. Performance Working on financial data brings some interesting technical challenges in the area of throughput. Here you can expect to focus more directly on software performance than at other organisations, while still striving for easily maintainable code. You will be digging deep into our system, understanding how it works and where it can be improved. Testing We rely heavily on validating our system using our extensive test suites. We test at all levels of our system from unit testing to full end to end tests in which the entire system is launched and tested in a simulated environment. All tests are run every 15 minutes on our CI to give us a fast and reliable feedback cycle. There is no waiting for overnight test suites here. As a developer at LMAX you will be expected Responsibilities Produce clear, well-structured and fully tested C++ and Python code A focus on writing high throughput software Use pair programming to increase the spread of knowledge and avoid siloing Continuously design and implement new features that improve the safety, performance and usability of our software Write interface code that spans C++ and Python (pybind) Essential Skills / Experience C++ development, modern C++ on a Linux/UNIX environment Python development, (Numpy/Pandas/SQL) Automated C++ and Python Testing Ability to understand business requirements and develop systems to meet them Ability to design well documented, simple and elegant systems that are easily maintainable Ability to work independently and with little guidance A finance and/or trading background is not required Desirable Skills / Experience Test driven development, with experience in testing at different levels of the system (unit, integration and acceptance tests). For C++ we use Catch2 and for python we use pytest Experience with pybind/nanobind Airflow DAGs or equivalent workflow orchestration Polars for high-performance data processing Continuous Integration (Jenkins) Knowledge of Websocket, TCP/IP networking Science or Maths related degree Benefits 25 days of holiday Bonus Pension contribution Private medical, dental, and vision coverage Life assurance Critical illness cover Wellness contribution program with access to ClassPass Plumm Platform Five volunteering days Give as You Earn initiative Learning and development programs Electric Vehicle Scheme Cycle to Work Scheme Season Ticket Loan

A financial technology company in Greater London is seeking a C++ and Python developer. Join their middle-office team to work on trade reconciliation, back-testing frameworks, and trading monitoring systems. The role involves writing high-performance code and requires skills in C++ and Python, as well as knowledge of testing methodologies. No finance background is required, making it an excellent opportunity for developers focusing on software performance and data engineering.