22 of 22 Contract Performance Optimisation Jobs in London

Senior Full Stack Developer

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600/day
performing solutions in Azure environments. Key Responsibilities Design, develop, and maintain scalable full-stack applications using React, Python, JavaScript, and TypeScript Build responsive, high-performance front-end solutions capable of handling large data volumes Develop and integrate APIs, microservices, and distributed systems Deploy and manage applications within Microsoft Azure …/CD pipelines to ensure reliable and repeatable deployments Collaborate closely with architecture, cloud, and AI teams to deliver production-ready solutions Drive performance optimisation, observability, scalability, and application reliability Required Skills & Experience Essential Extensive experience as a Senior Full Stack Developer Strong expertise in: React JavaScript/ ...

SQL Server Architect - DV Clearance

Hiring Organisation
Investigo Change Solutions
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 610 Daily
Failover Cluster Instances (FCI), log shipping, replication, and enterprise HA/DR solutions. Strong background supporting large-scale SharePoint environments, including SharePoint database architecture, performance, and operational support. Deep understanding of SQL Server performance optimisation, including indexing strategies, storage performance, I/O optimisation, concurrency … Server clustering, Availability Groups, Listener configuration, DNS failover, and resilience design patterns. Ability to assess architecture options and provide technical recommendations based on performance, operational complexity, maintainability, and cost. Excellent stakeholder engagement, documentation, and communication skills with the ability to present findings and recommendations to both technical and business ...

Full Stack Engineer - Front End - AI

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £551/day
deploying applications to cloud platforms, ideally Microsoft Azure (AWS experience also welcome). This role will focus on building, deploying, and optimising scalable, high-performance web applications that handle large volumes of data and integrate AI-driven components. You will work closely with backend engineers, cloud specialists … build, and maintain scalable front-end applications using React, python and modern JavaScript/TypeScript. Build front-end solutions that support high data throughput, performance optimisation, and responsiveness at scale. Collaborate on the deployment of applications to cloud environments (Azure preferred; AWS acceptable). Integrate front-end applications ...

Full Stack Engineer (Agentic AI)

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £501/day
deploying applications to cloud platforms, ideally Microsoft Azure (AWS experience also welcome). This role will focus on building, deploying, and optimising scalable, high-performance web applications that handle large volumes of data and integrate AI-driven components. You will work closely with backend engineers, cloud specialists … build, and maintain scalable front-end applications using React, python and modern JavaScript/TypeScript. * Build front-end solutions that support high data throughput, performance optimisation, and responsiveness at scale. * Collaborate on the deployment of applications to cloud environments (Azure preferred; AWS acceptable). * Integrate front-end applications ...

Senior Python AI Developer

Hiring Organisation
EMBS Engineering
Location
London, United Kingdom
Employment Type
Permanent, Contract
Salary
£60000 - £75000/annum + Benefits
Working with AWS services including Bedrock, AgentCore, EKS, EC2, S3 and SQS Designing CI/CD pipelines, automation and reusable microservices Supporting LLM benchmarking, performance monitoring and cost optimisation Integrating AI services with enterprise security and observability frameworks Collaborating with architects and platform engineers on scalable AI solutions … cloud engineering, particularly Bedrock and AgentCore RESTful APIs, microservices and distributed systems CI/CD pipelines, DevOps and automation LLM integration, evaluation and performance optimisation Secure application development and observability Experience with Terraform, GitOps, Kong API Gateway, SQL/NoSQL databases and AI evaluation tools such as Promptfoo ...

Senior Salesforce Developer

Hiring Organisation
Morson Edge
Location
City of London, London, United Kingdom
Employment Type
Contract
from technical design and development through to testing, deployment and ongoing platform optimisation. You'll combine project delivery with platform support, contributing to the performance, stability and continuous improvement of our Salesforce estate. Key Responsibilities Design, develop and implement scalable Salesforce solutions using Apex, Lightning Web Components (LWC), Salesforce … business requirements and translate them into robust technical designs and scalable Salesforce solutions. Refactor complex codebase architectures, improve code quality and optimise Salesforce platform performance and Governor Limits. Manage source control, deployments and release pipelines using Azure DevOps. Troubleshoot technical issues, resolve incidents and manage BAU requests as part ...

Data Engineer

Hiring Organisation
Synapri
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 460 - 470 Daily
data assets from legacy platforms into modern cloud-based environments. Deliver enterprise-grade data solutions within a highly regulated environment. Ensure data quality, integrity, performance, and security standards are met. Collaborate with technical and business stakeholders to translate requirements into effective data solutions. Troubleshoot production issues and implement sustainable … databases. Proven experience building and supporting enterprise data pipelines and integration solutions. Experience working within cloud-based data platforms. Strong understanding of data modelling, performance optimisation, and data quality controls. Desirable Experience Banking or Financial Services experience. Experience working within regulated environments. Exposure to Azure Data Platform services. ...

Data Engineer

Hiring Organisation
Synapri
Location
Canary Wharf, Greater London, United Kingdom
Employment Type
Contract
Contract Rate
£460 - £470/day
data assets from legacy platforms into modern cloud-based environments. Deliver enterprise-grade data solutions within a highly regulated environment. Ensure data quality, integrity, performance, and security standards are met. Collaborate with technical and business stakeholders to translate requirements into effective data solutions. Troubleshoot production issues and implement sustainable … databases. Proven experience building and supporting enterprise data pipelines and integration solutions. Experience working within cloud-based data platforms. Strong understanding of data modelling, performance optimisation, and data quality controls. Desirable Experience Banking or Financial Services experience. Experience working within regulated environments. Exposure to Azure Data Platform services. ...

Full Stack Developer

Hiring Organisation
MJA (London) Ltd
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway ...

Full Stack Developer

Hiring Organisation
MJA (London) Ltd
Location
EC3, Broad Street, Greater London, United Kingdom
Employment Type
Contract
APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway ...

CGEMJP - AI Engineer

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 600 Daily
Azure AI Search, Azure AI Foundry and associated cloud services. Production Engineering: Design reliable applications with robust error handling, retries, recovery, observability, security and performance optimisation. Required Expereince: Strong, hands-on Python software engineering experience. Proven experience delivering production-grade GenAI and LLM applications. Practical experience designing and implementing ...

CGEMJP00360221 - AI Engineer

Hiring Organisation
CBSbutler Holdings Limited
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
Up to £600 per day + inside ir35
Azure AI Search, Azure AI Foundry and associated cloud services. Production Engineering: Design reliable applications with robust error handling, retries, recovery, observability, security and performance optimisation. Required Expereince: Strong, hands-on Python software engineering experience. Proven experience delivering production-grade GenAI and LLM applications. Practical experience designing and implementing ...

Systems Engineer

Hiring Organisation
Pontoon
Location
London, United Kingdom
Employment Type
Contract
secure, resilient, scalable, and compliant with security requirements. Identifying technical challenges and providing appropriate mitigation strategies. Driving operational excellence through monitoring, automation, and performance optimisation. Required Experience: To succeed in this role, candidates should possess: A strong background in Systems Engineering, Cloud Engineering, or DevOps. Hands-on experience designing ...

Data Analytics Engineer

Hiring Organisation
Intec Select Ltd
Location
London, Billingsgate, United Kingdom
Employment Type
Contract
Contract Rate
£650 - £750/day
Data Analytics Engineer | Splunk & Cribl | SIEM Pipelines We're hiring a Data Analytics Engineer to lead the migration, optimisation and secure operation of log ingestion and observability pipelines, with a focus on moving log sources from Splunk ingestion to Cribl Stream/Edge. The role Lead the migration … Document log flows, pipeline topology and operational procedures What you'll bring Strong hands-on Splunk SIEM engineering (indexers, search heads, clustering, forwarders, CIM, performance optimisation) 2+ years with Cribl Stream/Edge, including distributed, load-balanced deployments Solid grasp of log transport (syslog ...

Snr Full Stack Python Engineer-Agentic Systems

Hiring Organisation
Harvey Nash
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£950 - £1000 per day
integrate LangChain and/or LangGraph based agentic workflows, including multi-step reasoning chains, tool-calling pipelines, and orchestration logic. * Develop responsive, high-performance front-end applications using React, with a focus on complex data grids and tables using AG Grid (sorting, filtering, grouping, pivoting, server-side row models … Validate asynchronous task pipelines for correctness, idempotency, retry behavior, and failure handling. * Participate in code reviews, ensuring adherence to coding standards, security practices, and performance benchmarks. * Support UAT (User Acceptance Testing) cycles, working with end users to validate functionality before release. Delivery * Own features end-to-end - from requirements ...

Blue Yonder WMS Consultant - London/hybrid - 3 months - Inside IR35

Hiring Organisation
Halian Technology Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£565 per day
picking, packing, shipping and cycle counting. Strong SQL and PL/SQL development expertise. Unix/Linux and shell scripting knowledge. Database concepts and performance optimisation. Integration technologies, APIs and interface troubleshooting. Data warehousing and ETL concepts. Experience of Git and Agile delivery practices If interested, please send ...

Java Modernization Technical Architect - SC Clearance

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £500/day Inside IR35 via Umbrella
Actions. Landing Zone & Cloud Integration: Architect integrations with Azure Landing Zones, Azure Storage, Azure SQL, and Azure Key Vault while ensuring strict security hardening, performance optimization, and observability. Governance & Leadership: Provide architectural oversight, conduct design reviews, establish migration best practices, and collaborate closely with client stakeholders, engineering leads … Azure Storage, Azure SQL, and Azure Key Vault. Modernization & Security: Track record in legacy-to-cloud application migration, OAuth2, JWT, REST API architecture, performance tuning, and security hardening. Containerization: Hands-on experience with Docker and Kubernetes for container orchestration. Front-End Fundamentals: Exposure to client-side technologies such ...

UI Front end Lead engineer – AEM & Generative AI (Claude)

Hiring Organisation
Vallum Associates
Location
London, United Kingdom
Employment Type
Contract
10+ years of experience in frontend development, enterprise UI architecture and technical leadership. The successful candidate will design and deliver scalable, reusable and high-performance frontend solutions using modern JavaScript frameworks, Adobe Experience Manager (AEM), AWS and AI-assisted development tools. Essential Skills & Experience 10+ years of frontend/… client libraries. Experience integrating frontend applications with AEM Headless, GraphQL and REST APIs . Proven expertise in frontend architecture, reusable components, design systems and performance optimisation. Hands-on experience with Claude AI/Claude Code for software development. Good understanding of AWS , CI/CD pipelines, Git and automated ...

OPEN Senior KDB+ / q Software Engineer

Hiring Organisation
Matchtech
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£545 - £730/day
platforms, and Prime Brokerage post-trade risk and margining environments. Working within a high-performing engineering team, you'll be responsible for the development, optimisation, support and enhancement of business-critical applications and data platforms supporting front-office and risk functions. Contract Details Contract Length: 13 weeks Start Date … Brokerage post-trade risk and margining . Strong knowledge of time-series data modelling. Experience with KDB ticker plant, RDB/HDB architectures and performance optimisation. Proven production support and troubleshooting experience. Experience within Financing, Securities Lending, Prime Brokerage or Risk domains. Experience integrating KDB platforms with Java ...

Blue Yonder (BY) WMS Lead Consultant

Hiring Organisation
DCV Technologies Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£565 per day
automation and operational support. Analyse and troubleshoot interfaces with ERP, transportation, automation and other third-party systems. Support batch jobs, monitoring, issue resolution and performance tuning. Contribute to upgrades, patches and continuous improvement. Essential Candidate Profile Demonstrable hands-on Blue Yonder WMS experience. This is mandatory, not simply generic … picking, packing, shipping and cycle counting. Strong SQL and PL/SQL development expertise. Unix/Linux and shell scripting knowledge. Database concepts and performance optimisation. Integration technologies, APIs and interface troubleshooting. Data warehousing and ETL concepts. Experience of Git and Agile delivery practices. Strong analytical/problem-solving ...

iSO Engineer

Hiring Organisation
DCV Technologies
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£425 - £500/day - Hybrid / Inside IR35
your key responsibilities will be to build, test, and deploy iOS applications while collaborating with designers, backend engineers, and product owners. Ensure app responsiveness, performance, and security compliance. Debug and resolve issues across different iOS versions and devices. Contribute to code quality standards, code reviews, and reusable component libraries. …/XML, and third-party integrations Experience with Push Notifications, Background Tasks, App Lifecycle Management Version control with Git/GitHub/GitLab Debugging, performance optimization, and memory management in iOS apps Secondary Skills: Knowledge of Unit/UI Testing (XCTest, XCUITest) Familiarity with CI/CD pipelines (Jenkins ...

Java Low Latency Engineer

Hiring Organisation
DCV Technologies
Location
London, United Kingdom
Employment Type
Contract
days from office) Long term contract position Role Overview We are looking for an experienced Java Low Latency Engineer with strong expertise in Java performance optimization, JVM tuning, and high-performance system development. The ideal candidate will have experience building event-driven, concurrent systems designed for low-latency … high-frequency environments Required Skills & Experience Strong Core Java and JVM performance tuning expertise. Excellent knowledge of Data Structures and Algorithms. Experience with concurrency, multithreading, and low-latency system design. Knowledge of GC, JNI, Java Unsafe, and JNR-FFI. Strong understanding of CPU architecture, shared memory, and memory-mapped ...