london (city of london), south east england, united kingdom
HCLTech
large enterprise initiatives Must have experience in Legacy Modernization programs Should be proficient at collaborating with cross functional teams Strong Background and experience in Data Ingestions, Transformation, Modeling and Performance tuning. Should have experience in designing and developing dashboards Strong Knowledge in Hadoop, Kafka, SQL/NoSQL Should have experience in creating roadmap to improve platform Observability Experience in More ❯
EMS/SCADA) This role focuses on supporting and improving energy management systems for power generation and grid control. You’ll help manage real-time operations and enhance system performance for critical infrastructure. What you’ll do Support and optimise EMS applications for Generation (AGC, Load Forecasting, Economic Dispatch, Power Flow) Conduct performancetuning, patching and security More ❯
leading software company based in Dublin who are hiring a Senior Software Developer to join their growing engineering team. The role focuses on developing robust desktop applications and high-performance back-end services using a combination of C++ , C# , and .NET technologies , with additional exposure to cloud integrations and Windows-based systems. You'll be working across both legacy … and modern platforms, contributing to new feature development, performance optimisation, and architectural improvements. Responsibilities: Design, develop, and maintain critical systems using C++ and C# Lead the modernisation of Win32 SDK applications into .NET Core environments Build and consume APIs (REST/SOAP) for system integrations Collaborate closely with internal teams across architecture, DevOps, and QA Contribute to cloud-based … components using Azure functions and services Take ownership of code quality, reviews, and performancetuning Participate in Agile ceremonies, technical discussions, and mentoring juniors when needed Desktop: Win32 SDK, Windows APIs, WPF, WinForms APIs: REST, SOAP Hybrid model - 2-3 days onsite in Dublin Modern tech environment with strong investment in R&D Clear career progression and technical More ❯
platforms. Monitor, maintain, and troubleshoot distributed containerized services using Docker and Docker Swarm. Respond to and resolve incidents, working to minimize downtime and ensure high system availability. Investigate system performance, log anomalies, and service issues, escalating when appropriate. Collaborate with DevOps and software engineering teams to implement improvements and automation. Maintain thorough documentation of system configurations, processes, and known … issues. Assist in system upgrades, patching, and performance tuning. Support security compliance and auditing activities where applicable. Participate in an on-call support rotation. Required Skills & Experience: 2+ years of experience in a technical support, DevOps, or infrastructure engineering role. Strong hands-on experience with Docker and Docker Swarm in a production environment. Proficiency with core AWS services: EC2 More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Paradigm Talent
integration between computation, data, and science. You should have Deep experience building and scaling backend systems and distributed applications . Strong coding skills in Python , with an understanding of performancetuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs … security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background in high-performance computing or large-scale scientific workloads. Expertise in data pipeline architecture and real-time streaming systems. Knowledge of scientific or biological computing environments . This is a rare opportunity More ❯
integration between computation, data, and science. You should have Deep experience building and scaling backend systems and distributed applications . Strong coding skills in Python , with an understanding of performancetuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs … security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background in high-performance computing or large-scale scientific workloads. Expertise in data pipeline architecture and real-time streaming systems. Knowledge of scientific or biological computing environments . This is a rare opportunity More ❯
london, south east england, united kingdom Hybrid / WFH Options
Paradigm Talent
integration between computation, data, and science. You should have Deep experience building and scaling backend systems and distributed applications . Strong coding skills in Python , with an understanding of performancetuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs … security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background in high-performance computing or large-scale scientific workloads. Expertise in data pipeline architecture and real-time streaming systems. Knowledge of scientific or biological computing environments . This is a rare opportunity More ❯
slough, south east england, united kingdom Hybrid / WFH Options
Paradigm Talent
integration between computation, data, and science. You should have Deep experience building and scaling backend systems and distributed applications . Strong coding skills in Python , with an understanding of performancetuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs … security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background in high-performance computing or large-scale scientific workloads. Expertise in data pipeline architecture and real-time streaming systems. Knowledge of scientific or biological computing environments . This is a rare opportunity More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Paradigm Talent
integration between computation, data, and science. You should have Deep experience building and scaling backend systems and distributed applications . Strong coding skills in Python , with an understanding of performancetuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs … security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background in high-performance computing or large-scale scientific workloads. Expertise in data pipeline architecture and real-time streaming systems. Knowledge of scientific or biological computing environments . This is a rare opportunity More ❯
City of London, London, United Kingdom Hybrid / WFH Options
ARC IT Recruitment Ltd
competitive + excellent bonus + benefits International Capital Markets firm is scaling its London Equities platform and is hiring a Senior TechOps Associate to drive platform reliability, low-latency performance, and controlled change across OMS/EMS, eTrading/algo, market data, and exchange connectivity. You will sit close to the desk and act as the go-to owner …/post-mortems. Safer, faster releases (blue/green, canary, feature flags) in partnership with Trading, Quant, and Engineering. Mature observability (logs/metrics/traces), capacity planning, and performancetuning for low-latency flows. Strong production hygiene and controls aligned to MiFID II/MAR/best-ex. Leadership of the London on-call rota and contribution … Splunk/Geneos. Practical understanding of market microstructure, exchange connectivity, and TCA/controls. Composed, commercially aware communicator with traders and senior leadership. Package & set-up Competitive base + performance bonus, benefits, and flexible hybrid working. A clear runway to platform ownership and team leadership. London HQ; hybrid model. Nice to haves Low-latency tuning experience. Experience with More ❯
Senior TechOps, Equities Platform London, Hybrid International Capital Markets firm is scaling its London Equities platform and is hiring a Senior TechOps Associate to drive platform reliability, low-latency performance, and controlled change across OMS/EMS, eTrading/algo, market data, and exchange connectivity. You will sit close to the desk and act as the go-to owner …/post-mortems. Safer, faster releases (blue/green, canary, feature flags) in partnership with Trading, Quant, and Engineering. Mature observability (logs/metrics/traces), capacity planning, and performancetuning for low-latency flows. Strong production hygiene and controls aligned to MiFID II/MAR/best-ex. Leadership of the London on-call rota and contribution … Splunk/Geneos. Practical understanding of market microstructure, exchange connectivity, and TCA/controls. Composed, commercially aware communicator with traders and senior leadership. Package & set-up Competitive base + performance bonus, benefits, and flexible hybrid working. A clear runway to platform ownership and team leadership. London HQ; hybrid model. Nice to haves Low-latency tuning experience. Experience with More ❯
Senior TechOps, Equities Platform London, Hybrid International Capital Markets firm is scaling its London Equities platform and is hiring a Senior TechOps Associate to drive platform reliability, low-latency performance, and controlled change across OMS/EMS, eTrading/algo, market data, and exchange connectivity. You will sit close to the desk and act as the go-to owner …/post-mortems. Safer, faster releases (blue/green, canary, feature flags) in partnership with Trading, Quant, and Engineering. Mature observability (logs/metrics/traces), capacity planning, and performancetuning for low-latency flows. Strong production hygiene and controls aligned to MiFID II/MAR/best-ex. Leadership of the London on-call rota and contribution … Splunk/Geneos. Practical understanding of market microstructure, exchange connectivity, and TCA/controls. Composed, commercially aware communicator with traders and senior leadership. Package & set-up Competitive base + performance bonus, benefits, and flexible hybrid working. A clear runway to platform ownership and team leadership. London HQ; hybrid model. Nice to haves Low-latency tuning experience. Experience with More ❯
london, south east england, united kingdom Hybrid / WFH Options
ARC IT Recruitment
Senior TechOps, Equities Platform London, Hybrid International Capital Markets firm is scaling its London Equities platform and is hiring a Senior TechOps Associate to drive platform reliability, low-latency performance, and controlled change across OMS/EMS, eTrading/algo, market data, and exchange connectivity. You will sit close to the desk and act as the go-to owner …/post-mortems. Safer, faster releases (blue/green, canary, feature flags) in partnership with Trading, Quant, and Engineering. Mature observability (logs/metrics/traces), capacity planning, and performancetuning for low-latency flows. Strong production hygiene and controls aligned to MiFID II/MAR/best-ex. Leadership of the London on-call rota and contribution … Splunk/Geneos. Practical understanding of market microstructure, exchange connectivity, and TCA/controls. Composed, commercially aware communicator with traders and senior leadership. Package & set-up Competitive base + performance bonus, benefits, and flexible hybrid working. A clear runway to platform ownership and team leadership. London HQ; hybrid model. Nice to haves Low-latency tuning experience. Experience with More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
ARC IT Recruitment
Senior TechOps, Equities Platform London, Hybrid International Capital Markets firm is scaling its London Equities platform and is hiring a Senior TechOps Associate to drive platform reliability, low-latency performance, and controlled change across OMS/EMS, eTrading/algo, market data, and exchange connectivity. You will sit close to the desk and act as the go-to owner …/post-mortems. Safer, faster releases (blue/green, canary, feature flags) in partnership with Trading, Quant, and Engineering. Mature observability (logs/metrics/traces), capacity planning, and performancetuning for low-latency flows. Strong production hygiene and controls aligned to MiFID II/MAR/best-ex. Leadership of the London on-call rota and contribution … Splunk/Geneos. Practical understanding of market microstructure, exchange connectivity, and TCA/controls. Composed, commercially aware communicator with traders and senior leadership. Package & set-up Competitive base + performance bonus, benefits, and flexible hybrid working. A clear runway to platform ownership and team leadership. London HQ; hybrid model. Nice to haves Low-latency tuning experience. Experience with More ❯
slough, south east england, united kingdom Hybrid / WFH Options
ARC IT Recruitment
Senior TechOps, Equities Platform London, Hybrid International Capital Markets firm is scaling its London Equities platform and is hiring a Senior TechOps Associate to drive platform reliability, low-latency performance, and controlled change across OMS/EMS, eTrading/algo, market data, and exchange connectivity. You will sit close to the desk and act as the go-to owner …/post-mortems. Safer, faster releases (blue/green, canary, feature flags) in partnership with Trading, Quant, and Engineering. Mature observability (logs/metrics/traces), capacity planning, and performancetuning for low-latency flows. Strong production hygiene and controls aligned to MiFID II/MAR/best-ex. Leadership of the London on-call rota and contribution … Splunk/Geneos. Practical understanding of market microstructure, exchange connectivity, and TCA/controls. Composed, commercially aware communicator with traders and senior leadership. Package & set-up Competitive base + performance bonus, benefits, and flexible hybrid working. A clear runway to platform ownership and team leadership. London HQ; hybrid model. Nice to haves Low-latency tuning experience. Experience with More ❯
to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance Key Responsibilities: Advocating TDD and solid development practices Providing technical leadership and peer … provide support What You'll Need: Experience working on large commercial systems Strong skills in C#, .NET Core, and Web APIs Database experience, working with both SQL and NoSQL Performancetuning and optimisation expertise Contact Philip Boltt at Lorien Global for more information. More ❯
to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance Key Responsibilities: Advocating TDD and solid development practices Providing technical leadership and peer … provide support What You’ll Need: Experience working on large commercial systems Strong skills in C#, .NET Core, and Web APIs Database experience, working with both SQL and NoSQL Performancetuning and optimisation expertise Contact Philip Boltt at Lorien Global for more information. More ❯
bolton, greater manchester, north west england, united kingdom
Lorien
to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance Key Responsibilities: Advocating TDD and solid development practices Providing technical leadership and peer … provide support What You’ll Need: Experience working on large commercial systems Strong skills in C#, .NET Core, and Web APIs Database experience, working with both SQL and NoSQL Performancetuning and optimisation expertise Contact Philip Boltt at Lorien Global for more information. More ❯
warrington, cheshire, north west england, united kingdom
Lorien
to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance Key Responsibilities: Advocating TDD and solid development practices Providing technical leadership and peer … provide support What You’ll Need: Experience working on large commercial systems Strong skills in C#, .NET Core, and Web APIs Database experience, working with both SQL and NoSQL Performancetuning and optimisation expertise Contact Philip Boltt at Lorien Global for more information. More ❯
and AI practice. You will play a key role in supporting and optimising MSSQL, MySQL, and Postgres database platforms across key strategic customer environments. From troubleshooting and monitoring to performancetuning, security, and database migrations, you will ensure the storage, processing, and quality of customer data while delivering large-scale data migration and modernisation projects. Key Responsibilities Optimise … Essential): Proven experience with MSSQL, MySQL, and Postgres database solutions. Strong knowledge of High Availability and Always On Availability Groups. Comprehensive understanding of indexing and optimisation techniques for database performance tuning. Experience in automating, monitoring, and managing databases and deployments using toolsets. Behavioural Competencies (Essential): Positive, collaborative, and customer-focused mindset. Eagerness to learn new technologies and mentor others. More ❯
Gloucestershire, United Kingdom Hybrid / WFH Options
Deerfoot Recruitment Solutions Limited
and a global customer base, making a real impact on the business and the planet. Key Responsibilities Provide expert technical support for global customers, troubleshooting installation, licensing, network, and performance issues across Windows environments Act as the go-to person for all internal IT support needs, managing networks, hardware, virtual servers (Hyper-V), and user accounts Use remote tools … player in a dynamic, international environment Key Skills & Experience Proven experience in a technical support, helpdesk, or IT support role Strong troubleshooting skills across Windows operating systems (installation, crashes, performancetuning) In-depth networking knowledge: TCP/IP, DNS, DHCP, VPNs, LAN/WAN, plus practical experience of tools like ping, tracert, nslookup Solid hands-on experience with More ❯
Stroud, Gloucestershire, South West, United Kingdom Hybrid / WFH Options
Deerfoot Recruitment Solutions
and a global customer base, making a real impact on the business and the planet. Key Responsibilities Provide expert technical support for global customers, troubleshooting installation, licensing, network, and performance issues across Windows environments Act as the go-to person for all internal IT support needs, managing networks, hardware, virtual servers (Hyper-V), and user accounts Use remote tools … player in a dynamic, international environment Key Skills & Experience Proven experience in a technical support, helpdesk, or IT support role Strong troubleshooting skills across Windows operating systems (installation, crashes, performancetuning) In-depth networking knowledge: TCP/IP, DNS, DHCP, VPNs, LAN/WAN, plus practical experience of tools like ping, tracert, nslookup Solid hands-on experience with More ❯
London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces for some of the most demanding users in finance. What You’ll Be Doing: Building high-performance, data-intensive … engineering excellence and code quality are non-negotiable Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performancetuning, and scalable component design Experience in fast-paced environments (finance, trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real-time trading decisions Work in a flat-structured, engineering-led environment with rapid decision More ❯
London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces for some of the most demanding users in finance. What You’ll Be Doing: Building high-performance, data-intensive … engineering excellence and code quality are non-negotiable Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performancetuning, and scalable component design Experience in fast-paced environments (finance, trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real-time trading decisions Work in a flat-structured, engineering-led environment with rapid decision More ❯
London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces for some of the most demanding users in finance. What You’ll Be Doing: Building high-performance, data-intensive … engineering excellence and code quality are non-negotiable Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performancetuning, and scalable component design Experience in fast-paced environments (finance, trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real-time trading decisions Work in a flat-structured, engineering-led environment with rapid decision More ❯