1 to 25 of 70 Performance Optimisation Jobs in the City of London

Business Analyst - Financial Banking Candidates will come from highly technical background with a track record of delivering complex, low-level code systems (e.g. C++, Java), with strong knowledge of performance optimisation and latency management along with Networking (TCP, UDP, multicast) and low latency data distribution. Ideally these skills will have been gained in a Low Latency Financial/… ability to learn in the role is a must. Essential Proven track record of specifying and delivering complex, low-level code systems (e.g. C++, Java), with strong knowledge of performance optimisation, latency management, concurrency, and integration considerations. Strong knowledge of networking principles (TCP, UDP, multicast) and experience designing for resilience, throughput, and low-latency data distribution. Expertise in More ❯

Design and build RESTful API endpoints using NodeJS and Express, including detailed API documentation. Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full-Stack Development: Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices. Integration & Automation: Architect and maintain integrations with external … Proven track record of leading development teams and managing large-scale projects. Database Expertise: In-depth experience with PostgreSQL/SQL, including design of complex schemas, writing queries and performance optimisation. Security & Performance: Deep understanding of application security best practices, performance tuning, and scalable architecture. Problem-Solving: Ability to troubleshoot complex technical issues, with a proactive and … well-being, and continuous growth, ensuring that you have the support and resources to excel both professionally and personally. Competitive Salary: £50,000 - £65,000 per year, with potential performance-based increases. Performance Bonus: Up to 10% annual bonus. Generous Holiday Allowance: 27 days holiday plus bank holidays. Health Insurance: Private health insurance including dental care, vision, and More ❯

Design and build RESTful API endpoints using NodeJS and Express, including detailed API documentation. Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full-Stack Development: Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices. Integration & Automation: Architect and maintain integrations with external … Proven track record of leading development teams and managing large-scale projects. Database Expertise: In-depth experience with PostgreSQL/SQL, including design of complex schemas, writing queries and performance optimisation. Security & Performance: Deep understanding of application security best practices, performance tuning, and scalable architecture. Problem-Solving: Ability to troubleshoot complex technical issues, with a proactive and … well-being, and continuous growth, ensuring that you have the support and resources to excel both professionally and personally. Competitive Salary: £50,000 - £65,000 per year, with potential performance-based increases. Performance Bonus: Up to 10% annual bonus. Generous Holiday Allowance: 27 days holiday plus bank holidays. Health Insurance: Private health insurance including dental care, vision, and More ❯

modern front-end frameworks (e.g., React), while leveraging broader language experience (Java, Python) to support full-stack collaboration. Collaborate with cloud infrastructure teams (AWS, Azure, or GCP) to support performance optimization, environment configuration, and scalable feature delivery in cloud-native applications. Establish and maintain CI/CD practices (e.g., GitHub Actions, Jenkins), contributing to the automation of testing, builds More ❯

modern front-end frameworks (e.g., React), while leveraging broader language experience (Java, Python) to support full-stack collaboration. Collaborate with cloud infrastructure teams (AWS, Azure, or GCP) to support performance optimization, environment configuration, and scalable feature delivery in cloud-native applications. Establish and maintain CI/CD practices (e.g., GitHub Actions, Jenkins), contributing to the automation of testing, builds More ❯

Hybrid/On-site) Location: London, UK Type: Full-time | Permanent Salary: Competitive + equity + benefits Are you a seasoned Rust Engineer with a passion for building high-performance, reliable systems? We’re looking for an experienced Senior Rust Engineer to join our London team and take ownership of critical backend components that power our next-generation platform. … Mentor junior and mid-level engineers, sharing best practices in systems design and Rust development Collaborate with cross-functional teams to deliver scalable, secure, and fault-tolerant applications Drive performance tuning, code reviews, and architectural improvements across the stack What We’re Looking For 5–8+ years of professional software engineering experience 3–5+ years of hands-on experience … with Rust in production environments Strong understanding of systems programming , concurrency , networking , and low-level performance optimisation Experience with microservices , distributed systems , or blockchain technologies is highly desirable Familiarity with Linux systems , CI/CD pipelines , containerisation (Docker/Kubernetes) , and cloud infrastructure (AWS, GCP, or Azure) A pragmatic engineer who values clean code, testing, and long-term More ❯

Hybrid/On-site) Location: London, UK Type: Full-time | Permanent Salary: Competitive + equity + benefits Are you a seasoned Rust Engineer with a passion for building high-performance, reliable systems? We’re looking for an experienced Senior Rust Engineer to join our London team and take ownership of critical backend components that power our next-generation platform. … Mentor junior and mid-level engineers, sharing best practices in systems design and Rust development Collaborate with cross-functional teams to deliver scalable, secure, and fault-tolerant applications Drive performance tuning, code reviews, and architectural improvements across the stack What We’re Looking For 5–8+ years of professional software engineering experience 3–5+ years of hands-on experience … with Rust in production environments Strong understanding of systems programming , concurrency , networking , and low-level performance optimisation Experience with microservices , distributed systems , or blockchain technologies is highly desirable Familiarity with Linux systems , CI/CD pipelines , containerisation (Docker/Kubernetes) , and cloud infrastructure (AWS, GCP, or Azure) A pragmatic engineer who values clean code, testing, and long-term More ❯

that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong knowledge of relational databases such as MySQL or PostgreSQL Experience with asynchronous processing, caching, and queue systems (e.g., Redis, Horizon) Solid understanding of modern development practices — Git More ❯

AWS Skills - experienced with AWS infrastructure and cloud networking. Engineering Best Practice - Strong knowledge of DevOps and modern engineering practices. API & Microservices - Experience building secure, scalable API-based microservices. Performance Optimisation - Ability to design solutions with performance in mind, with a focus on monitoring and diagnostics. Collaboration & Influence - Strong ability to work across teams, balancing ambition with More ❯

with strong JavaScript/TypeScript and React skills, eager to grow within a dynamic team. Key Focus Areas Frontend Development: Build and maintain user interfaces with responsive design and performance optimization. Translate UI/UX wireframes into high-quality code, including updates to the design system. Ensure seamless integration with backend services. Collaboration & Growth: Work with cross-functional teams More ❯

with strong JavaScript/TypeScript and React skills, eager to grow within a dynamic team. Key Focus Areas Frontend Development: Build and maintain user interfaces with responsive design and performance optimization. Translate UI/UX wireframes into high-quality code, including updates to the design system. Ensure seamless integration with backend services. Collaboration & Growth: Work with cross-functional teams More ❯

data, product, and engineering teams, not a 'heads-down coder' type. Top 4 Core Skills Python - workflow automation, data processing, and ETL/ELT development. Snowflake - scalable data architecture, performance optimisation, and governance. SQL - expert-level query writing and optimisation for analytics and transformations. dbt (Data Build Tool) - modular data modelling, testing, documentation, and version control. Key More ❯

/dimension design, hierarchies, SCDs). Proven experience building ETL/ELT pipelines using tools such as SSIS , dbt , or Airflow . Solid understanding of database administration , tuning, and performance optimisation across MSSQL and PostgreSQL . Key Responsibilities: Design and maintain data models that meet business requirements, ensuring scalability, consistency, and accuracy. Build and manage ETL/ELT … pipelines to integrate data from S3 and various sources into the analytical layer. Administer and optimise MSSQL Server and PostgreSQL databases for performance and reliability. Collaborate with internal teams to improve data availability, reliability, and performance across systems. Design and maintain secure, scalable AWS cloud infrastructure supporting analytical workloads. Create and maintain dimensional and semantic data models for More ❯

will lead a team of skilled network engineers, define the enterprise networking roadmap, and collaborate with cross-functional teams — including Security, Infrastructure, and IT Operations — to deliver a high-performance, high-availability network platform that underpins mission-critical business and customer operations. Key Responsibilities Strategic Leadership Define and execute the strategic vision for enterprise and customer network infrastructure across … scalability across the enterprise. Lead continuous improvement initiatives, driving innovation, automation, and standardisation in network design and operations. Architecture, Design & Delivery Oversee the end-to-end design, implementation, and optimisation of LAN, WAN, SD-WAN, VPN, and wireless solutions across all environments. Manage enterprise routing, switching, VLAN segmentation, firewall policies, telephony systems (ISDN/SIP) , and internal/external … internet access. Ensure network resilience through robust backup, redundancy, and disaster recovery mechanisms. Lead network capacity planning, performance optimisation, and technology refresh cycles . Own the full lifecycle of network-related projects , from requirements gathering through to procurement, budgeting, vendor management , and security assessments . Security, Compliance & Governance Partner with Information Security teams to enhance network security posture More ❯

and new ideas. What You Bring ⚡ SDR Experience 1+ years quota-carrying SDR experience (SaaS, martech, or agency services) with ambition to progress to AE within a year. 📈 Research & Optimisation Mindset Obsess over prospecting, performance optimisation, and leveraging AI + data to smash targets. 🔎 List-Building Strength Skilled at identifying ICPs, budget owners, and decision-makers. ✍️ Communication More ❯

using JIRA for task management and support workflows. Strong experience working with observability tools (Grafana) Strong troubleshooting and problem-solving skills in cloud environments. Understanding of cloud security and performance optimisation best practices. Knowledge of scripting or automation tools (e.g., Python, Terraform) is a plus. Excellent communication and customer service skills. Certifications in GCP (Professional certifications) are highly … Manage and respond to cloud incidents using incident.io, ensuring timely resolution. Use JIRA to log, track, and prioritize support tickets and workflow tasks. Monitor and maintain cloud infrastructure for performance, reliability, and security. Collaborate with teams to identify and implement solutions to technical challenges. Assist in deploying, configuring, and optimising GCP resources. Create and maintain documentation for troubleshooting processes More ❯

using JIRA for task management and support workflows. Strong experience working with observability tools (Grafana) Strong troubleshooting and problem-solving skills in cloud environments. Understanding of cloud security and performance optimisation best practices. Knowledge of scripting or automation tools (e.g., Python, Terraform) is a plus. Excellent communication and customer service skills. Certifications in GCP (Professional certifications) are highly … Manage and respond to cloud incidents using incident.io, ensuring timely resolution. Use JIRA to log, track, and prioritize support tickets and workflow tasks. Monitor and maintain cloud infrastructure for performance, reliability, and security. Collaborate with teams to identify and implement solutions to technical challenges. Assist in deploying, configuring, and optimising GCP resources. Create and maintain documentation for troubleshooting processes More ❯

team members. About You: Proven experience with Dataverse/Dynamics 365 plugin development. Experience with Azure integrations (Function Apps, Logic Apps, APIM) Strong understanding of Dataverse architecture, security, and performance optimisation. Experience with Power Platform components, ALM, and CI/CD (Azure DevOps, Git). Relevant Microsoft certifications (PL-400, PL-600, AZ-204) are a plus. Why Join More ❯

team members. About You: Proven experience with Dataverse/Dynamics 365 plugin development. Experience with Azure integrations (Function Apps, Logic Apps, APIM) Strong understanding of Dataverse architecture, security, and performance optimisation. Experience with Power Platform components, ALM, and CI/CD (Azure DevOps, Git). Relevant Microsoft certifications (PL-400, PL-600, AZ-204) are a plus. Why Join More ❯

pipelines to streamline marketing analytics processes. Work hands-on with complex, incomplete datasets and build customer lifecycle and LTV models. Translate insights into actionable recommendations for marketing strategy and performance optimisation. Collaborate with internal stakeholders and third-party clients (e.g., VS, JoJo, Zalando) to align analytics efforts. Required Skills & Experience: 4–5 years of commercial experience in data science More ❯

formulas. Understanding of Model-Driven Apps and Dataverse schema design. Power Automate: Experience building large, multi-branch flows with complex logic and varied data connectors. Skilled in error handling, performance optimization, and flow governance. Strong SQL skills for data modelling, querying, and optimization within Fabric and Power BI. Knowledge of Python for data manipulation, API automation, and AI model More ❯

formulas. Understanding of Model-Driven Apps and Dataverse schema design. Power Automate: Experience building large, multi-branch flows with complex logic and varied data connectors. Skilled in error handling, performance optimization, and flow governance. Strong SQL skills for data modelling, querying, and optimization within Fabric and Power BI. Knowledge of Python for data manipulation, API automation, and AI model More ❯

of collaboration applications, including Microsoft 365, Google Workspace, Dropbox, Box, Asana, Slack, and others. Troubleshooting complex issues, collaborating with users, and ensuring timely resolutions. Managing application changes, testing, and performance optimisation. Developing and maintaining documentation, wikis, and user guides. Identifying recurring issues, driving process improvements, and enhancing service reliability. Supporting user migrations between platforms and advising on best-fit More ❯

of collaboration applications, including Microsoft 365, Google Workspace, Dropbox, Box, Asana, Slack, and others. Troubleshooting complex issues, collaborating with users, and ensuring timely resolutions. Managing application changes, testing, and performance optimisation. Developing and maintaining documentation, wikis, and user guides. Identifying recurring issues, driving process improvements, and enhancing service reliability. Supporting user migrations between platforms and advising on best-fit More ❯

drive their mobile app experience to the next level. 💼 The Role As a React Native Technical Lead , you’ll take ownership of their mobile app development — from architecture and performance to delivery and deployment. This is a fully hands-on position where you’ll still be coding daily while leading by example, mentoring engineers, and setting the technical direction … emerging trends in mobile and EdTech technology 💡 What They’re Looking For Proven experience building and delivering production-grade React Native applications Strong understanding of TypeScript , React , and mobile performance optimisation Experience integrating APIs, CI/CD pipelines, and app store deployments Ability to make architectural decisions and lead technical discussions Passion for education, user experience, and clean More ❯