City of London, London, United Kingdom Hybrid / WFH Options
VirtueTech Recruitment Group
analytics, optimisation, and real-time data processing to support trading and risk decisions. This role will focus on designing, building, and optimising the new ClickHouse data architecture , ensuring scalability, performance, and integration with existing trading systems. You’ll play a key role in refactoring existing SQL pipelines, enhancing data models, and implementing best practices for high-volume, low-latency … are SingleStore, Rockset, TimescaleDB Key Responsibilities: Design and implement scalable data solutions within ClickHouse . Migrate existing SQL data models, ETL pipelines, and reporting layers to ClickHouse. Optimise query performance, data ingestion, and storage for high-frequency trading data. Collaborate with traders, quants, and data analysts to ensure alignment with business requirements. Integrate ClickHouse with surrounding systems, including trading … risk, and analytics platforms. Establish data quality controls, monitoring, and performancetuning best practices. Support the ongoing evolution of the data architecture and tooling ecosystem. Experience Required: 5+ years’ experience as a C# Engineer or ClickHouse Developer in trading or financial services. Expert-level SQL development and optimisation skills. Hands-on experience with ClickHouse (architecture, performancetuningMore ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
VirtueTech Recruitment Group
analytics, optimisation, and real-time data processing to support trading and risk decisions. This role will focus on designing, building, and optimising the new ClickHouse data architecture , ensuring scalability, performance, and integration with existing trading systems. You’ll play a key role in refactoring existing SQL pipelines, enhancing data models, and implementing best practices for high-volume, low-latency … are SingleStore, Rockset, TimescaleDB Key Responsibilities: Design and implement scalable data solutions within ClickHouse . Migrate existing SQL data models, ETL pipelines, and reporting layers to ClickHouse. Optimise query performance, data ingestion, and storage for high-frequency trading data. Collaborate with traders, quants, and data analysts to ensure alignment with business requirements. Integrate ClickHouse with surrounding systems, including trading … risk, and analytics platforms. Establish data quality controls, monitoring, and performancetuning best practices. Support the ongoing evolution of the data architecture and tooling ecosystem. Experience Required: 5+ years’ experience as a C# Engineer or ClickHouse Developer in trading or financial services. Expert-level SQL development and optimisation skills. Hands-on experience with ClickHouse (architecture, performancetuningMore ❯
City of London, London, United Kingdom Hybrid / WFH Options
Harrington Starr
Software Engineer London, UK £85,000 basic plus bonus We’re looking for a Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You’ll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal memory … dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What you’ll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets … Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What we’re looking for Solid experience in software engineering with strong experience in Python, Java, or C# Proven track record of performancetuning in large-scale, distributed More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Harrington Starr
Junior Software Engineer London, UK £85,000 basic plus bonus We’re looking for a Junior Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You’ll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed … dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What you’ll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets … Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What we’re looking for A few years commercial experience in software engineering with strong experience in Python, Java, or C# Proven track record of performancetuning in More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Harrington Starr
Junior Software Engineer London, UK £85,000 basic plus bonus We’re looking for a Junior Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You’ll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed … dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What you’ll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets … Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What we’re looking for A few years commercial experience in software engineering with strong experience in Python, Java, or C# Proven track record of performancetuning in More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Techfellow Limited
Up to c. £225k Comp Package | Hybrid Working - 3 Days in Office] Role Overview We’re representing a global trading and digital assets firm at the forefront of high-performance technology and infrastructure innovation. The business is seeking a Site Reliability & Infrastructure Engineer to help design, automate, and scale the systems that underpin its global trading platforms. This role … AWS) and on-prem environments Implement automation across the stack using Infrastructure-as-Code principles (Terraform, Ansible, or similar) Administer and optimise Kubernetes clusters across multiple regions, improving resilience, performance, and visibility Develop tools and scripts in Python or Go to automate monitoring, configuration, and incident response workflows Contribute to on-prem colocation expansion projects, introducing low-latency engineering … practices into the infrastructure Optimise Linux systems for performance and reliability, including kernel tuning and networking configuration Partner with development and platform teams to embed SRE best practices, reducing manual toil through automation and observability Drive improvements in monitoring, alerting, and log collection pipelines to enhance system insight and uptime Participate in architecture and design reviews, guiding platform More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Techfellow Limited
Up to c. £225k Comp Package | Hybrid Working - 3 Days in Office] Role Overview We’re representing a global trading and digital assets firm at the forefront of high-performance technology and infrastructure innovation. The business is seeking a Site Reliability & Infrastructure Engineer to help design, automate, and scale the systems that underpin its global trading platforms. This role … AWS) and on-prem environments Implement automation across the stack using Infrastructure-as-Code principles (Terraform, Ansible, or similar) Administer and optimise Kubernetes clusters across multiple regions, improving resilience, performance, and visibility Develop tools and scripts in Python or Go to automate monitoring, configuration, and incident response workflows Contribute to on-prem colocation expansion projects, introducing low-latency engineering … practices into the infrastructure Optimise Linux systems for performance and reliability, including kernel tuning and networking configuration Partner with development and platform teams to embed SRE best practices, reducing manual toil through automation and observability Drive improvements in monitoring, alerting, and log collection pipelines to enhance system insight and uptime Participate in architecture and design reviews, guiding platform More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Hunter Bond
/Hybrid My client are seeking a talented Software Engineer who will play a critical role in developing and optimizing high-frequency trading systems, ensuring they operate at peak performance with minimal latency. This is an opportunity to work in a fast-paced, intellectually challenging environment where your contributions will have a direct impact on the firm's success. … class technical team that pride themselves on working with the most cutting edge technologies and you will work and learn from the best. Responsibilities: Design, develop, and maintain high-performance trading applications. Performancetuning of state of the art trading systems - optimise code for maximum speed and efficiency, minimising latency. Implement and enhance trading algorithms in collaboration More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Hunter Bond
/Hybrid My client are seeking a talented Software Engineer who will play a critical role in developing and optimizing high-frequency trading systems, ensuring they operate at peak performance with minimal latency. This is an opportunity to work in a fast-paced, intellectually challenging environment where your contributions will have a direct impact on the firm's success. … class technical team that pride themselves on working with the most cutting edge technologies and you will work and learn from the best. Responsibilities: Design, develop, and maintain high-performance trading applications. Performancetuning of state of the art trading systems - optimise code for maximum speed and efficiency, minimising latency. Implement and enhance trading algorithms in collaboration More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Areti Group | B Corp™
/CD pipelines and Docker -based runtime on AWS ; Infrastructure-as-Code via CDK/Terraform (CDKTF) . Apply secure-by-design and TDD ; instrument apps for observability and performance . Collaborate with product, platform, and security teams to meet operational and compliance requirements. The toolkit you’ll use Frontend: TypeScript, React.js, Vite, Material-UI, HTML5, CSS Backend: Node.js … CI/CD . Building and consuming RESTful APIs ; JSON schemas; integration testing. Comfortable in AWS and modern Infrastructure-as-Code approaches. Strong engineering fundamentals: code reviews, testing, observability, performancetuning . Security Clearance: Active SC or DV (must be current). Nice-to-haves Military background (RAF/Army/Navy) or delivery in defence, aerospace, or More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Areti Group | B Corp™
/CD pipelines and Docker -based runtime on AWS ; Infrastructure-as-Code via CDK/Terraform (CDKTF) . Apply secure-by-design and TDD ; instrument apps for observability and performance . Collaborate with product, platform, and security teams to meet operational and compliance requirements. The toolkit you’ll use Frontend: TypeScript, React.js, Vite, Material-UI, HTML5, CSS Backend: Node.js … CI/CD . Building and consuming RESTful APIs ; JSON schemas; integration testing. Comfortable in AWS and modern Infrastructure-as-Code approaches. Strong engineering fundamentals: code reviews, testing, observability, performancetuning . Security Clearance: Active SC or DV (must be current). Nice-to-haves Military background (RAF/Army/Navy) or delivery in defence, aerospace, or More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Tenth Revolution Group
and machine learning use cases. Work closely with clients to understand data requirements and translate them into robust technical solutions. Implement best practices for data modelling, data quality, and performancetuning across cloud-based platforms. Collaborate with cross-functional teams including data scientists, analysts, and software engineers to deliver end-to-end data solutions. Ensure data security, compliance … standards are met across all projects. Required Skills Strong experience with Azure data services (Data Factory, Synapse, Blob Storage, etc.). Proficiency in SQL for data manipulation, transformation, and performance optimisation. Hands-on experience with Databricks (Spark, Delta Lake, notebooks). Solid understanding of data architecture principles and cloud-native design. Experience working in consultancy or client-facing roles More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Tenth Revolution Group
and machine learning use cases. Work closely with clients to understand data requirements and translate them into robust technical solutions. Implement best practices for data modelling, data quality, and performancetuning across cloud-based platforms. Collaborate with cross-functional teams including data scientists, analysts, and software engineers to deliver end-to-end data solutions. Ensure data security, compliance … standards are met across all projects. Required Skills Strong experience with Azure data services (Data Factory, Synapse, Blob Storage, etc.). Proficiency in SQL for data manipulation, transformation, and performance optimisation. Hands-on experience with Databricks (Spark, Delta Lake, notebooks). Solid understanding of data architecture principles and cloud-native design. Experience working in consultancy or client-facing roles More ❯
City of London, London, United Kingdom Hybrid / WFH Options
The Curve Group
ll be responsible for: Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis Proactively maintaining and optimising applications, performing upgrades and configuration changes Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users Collaborating closely with engineering and business teams to drive operational excellence Enhancing processes, documentation, and tooling to support … looking for: Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment Strong knowledge of SRE principles, incident management, monitoring, and performancetuning Hands-on technical skills across a broad range of technologies, including: Microsoft: C#, VB, .NET Core, Azure, SQL Server, IIS, Windows Server Web: React, RESTful APIs, Docker More ❯
City of London, London, United Kingdom Hybrid / WFH Options
The Curve Group
ll be responsible for: Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis Proactively maintaining and optimising applications, performing upgrades and configuration changes Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users Collaborating closely with engineering and business teams to drive operational excellence Enhancing processes, documentation, and tooling to support … looking for: Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment Strong knowledge of SRE principles, incident management, monitoring, and performancetuning Hands-on technical skills across a broad range of technologies, including: Microsoft: C#, VB, .NET Core, Azure, SQL Server, IIS, Windows Server Web: React, RESTful APIs, Docker More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Tenth Revolution Group
resulting in streamlined data workflows and improved operational efficiency. Collaborate cross-functionally with stakeholders to understand data requirements and develop customized solutions, including data modelling & governance, schema design, and performancetuning, enabling agile and data-driven decision-making across the organization's business units. What do I need to apply for the role High level of Azure data More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Mondrian Alpha
proficiency in SQL and Python for data processing and modelling. Deep understanding of Tableau (or similar tools) and visualisation best practices. Solid grasp of data architecture, schema design, and performance tuning. Excellent communication skills — able to translate complex technical detail into clear business insight. Financial knowledge is a plus, but not required. Experience with Microsoft SQL Server, PostgreSQL, or More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Mondrian Alpha
proficiency in SQL and Python for data processing and modelling. Deep understanding of Tableau (or similar tools) and visualisation best practices. Solid grasp of data architecture, schema design, and performance tuning. Excellent communication skills — able to translate complex technical detail into clear business insight. Financial knowledge is a plus, but not required. Experience with Microsoft SQL Server, PostgreSQL, or More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Caspian One
maintaining database solutions that support critical business operations within a global investment banking environment. Key Responsibilities Design, develop, and enhance stored procedures to implement complex business logic. Optimize query performance and troubleshoot database issues. Work with large datasets and ensure efficient SQL operations. Collaborate with cross-functional teams to deliver high-quality database solutions. Maintain version control and CI … Git and GitLab. Required Skills In-depth knowledge of SQL, T-SQL, and data warehousing concepts. Proven experience with Sybase ASE databases. Proficiency in Linux environments. Strong experience in performancetuning and query optimisation. Familiarity with Git and CI/CD tools (eg, GitLab). Excellent communication and problem-solving skills. Nice to Have Shell Scripting experience. Knowledge More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Caspian One
maintaining database solutions that support critical business operations within a global investment banking environment. Key Responsibilities Design, develop, and enhance stored procedures to implement complex business logic. Optimize query performance and troubleshoot database issues. Work with large datasets and ensure efficient SQL operations. Collaborate with cross-functional teams to deliver high-quality database solutions. Maintain version control and CI … Git and GitLab. Required Skills In-depth knowledge of SQL, T-SQL, and data warehousing concepts. Proven experience with Sybase ASE databases. Proficiency in Linux environments. Strong experience in performancetuning and query optimisation. Familiarity with Git and CI/CD tools (eg, GitLab). Excellent communication and problem-solving skills. Nice to Have Shell Scripting experience. Knowledge More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Inara
engineers and frontend developers Deploy and maintain applications on AWS or Azure cloud environments Implement and optimise CI/CD pipelines to ensure smooth delivery and integration Support application performancetuning, monitoring, and troubleshooting Contribute to code reviews, testing, and documentation Essential Skills Strong commercial experience with Python and Flask Proven experience working in cloud environments (AWS or More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Ventula Consulting
proficiency and at least 5 years of production experience with Go (Golang) . This role is centered on Go, and we require deep experience with its concurrency patterns and performance tuning. Strong, proven experience designing, building, and scaling high-availability RESTful APIs for mobile or web clients. Deep experience with distributed systems, microservices architecture, and event-driven patterns. Demonstrated More ❯
City Of London, England, United Kingdom Hybrid / WFH Options
SGI
global investment manager that’s serious about modern engineering and data-driven investing. Our client is looking for an experienced Senior/Principal Python Developer to help build high-performance systems that power investment decisions, analytics, and portfolio operations. The Opportunity Be part of a cross-functional engineering team working closely with quants, data scientists and portfolio managers to … Design, develop and maintain scalable Python applications supporting investment and analytics workflows. Translate complex financial requirements into elegant, maintainable code in partnership with business and quant teams. Lead on performancetuning, code quality, testing, and CI/CD practices. Improve latency, reliability and observability of data-driven processes. Contribute to modernising legacy systems towards cloud-native, distributed architectures. … Why Join Work for a respected global investment firm investing in technology and modern engineering practices. Hybrid working (London-based; typically 2–3 days in office ). Competitive salary, performance-based bonus and strong benefits. Inclusive, learning-focused culture where you can have real impact on investment systems. If you’re a hands-on Python engineer who enjoys solving More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
SGI
global investment manager that’s serious about modern engineering and data-driven investing. Our client is looking for an experienced Senior/Principal Python Developer to help build high-performance systems that power investment decisions, analytics, and portfolio operations. The Opportunity Be part of a cross-functional engineering team working closely with quants, data scientists and portfolio managers to … Design, develop and maintain scalable Python applications supporting investment and analytics workflows. Translate complex financial requirements into elegant, maintainable code in partnership with business and quant teams. Lead on performancetuning, code quality, testing, and CI/CD practices. Improve latency, reliability and observability of data-driven processes. Contribute to modernising legacy systems towards cloud-native, distributed architectures. … Why Join Work for a respected global investment firm investing in technology and modern engineering practices. Hybrid working (London-based; typically 2–3 days in office ). Competitive salary, performance-based bonus and strong benefits. Inclusive, learning-focused culture where you can have real impact on investment systems. If you’re a hands-on Python engineer who enjoys solving More ❯
