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33 senior platform engineer jobs found in London

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Contract Spy
Oct 07, 2026
Duration not stated
Senior Platform Engineer (AI, AWS & Developer Experience) at UST, London, £Contract Rate
Contract Spy London, UK
Role description Location: London (Hybrid – 3 days onsite, mandatory) Employment Type : Permanent | Fixed-Term Contract | Contract (Inside IR35) Start Date : Immediate/ Short Notice period About the Role We are seeking a Senior Platform Engineer (AI, AWS & Developer Experience) to help design and build the platform from the ground up. This is a hands-on engineering role focused on AWS-native application development, internal developer platforms, agentic AI, automation, and engineering governance. You will create the tools, APIs, developer workflows, AI services, and platform capabilities that accelerate software delivery while embedding security, compliance, and operational excellence by default. Key Responsibilities Build cloud-native platform services, APIs, developer tooling, and automation on AWS. Design and develop AI-powered engineering capabilities using AWS Bedrock and agentic AI frameworks. Create reusable platform...
Contract Spy
Sep 30, 2026
Duration not stated
Senior Platform Engineer (AI, AWS & Developer Experience) at UST, London, £Contract Rate
Contract Spy London, UK
Location: London (Hybrid – 3 days onsite, mandatory) Employment Type : Permanent | Fixed-Term Contract | Contract (Inside IR35) Start Date : Immediate/ Short Notice period About the Role We are seeking a Senior Platform Engineer (AI, AWS & Developer Experience) to help design and build the platform from the ground up. This is a hands-on engineering role focused on AWS-native application development, internal developer platforms, agentic AI, automation, and engineering governance. You will create the tools, APIs, developer workflows, AI services, and platform capabilities that accelerate software delivery while embedding security, compliance, and operational excellence by default. Key Responsibilities Build cloud-native platform services, APIs, developer tooling, and automation on AWS. Design and develop AI-powered engineering capabilities using AWS Bedrock and agentic AI frameworks. Create reusable platform patterns, templates, and...
Contract Spy
Sep 23, 2026
Duration not stated
Senior Platform Engineer (AI, AWS & Developer Experience) at UST, London, £Contract Rate
Contract Spy London, UK
Role description Location: London (Hybrid – 3 days onsite, mandatory) Employment Type : Permanent | Fixed-Term Contract | Contract (Inside IR35) Start Date : Immediate/ Short Notice period About the Role We are seeking a Senior Platform Engineer (AI, AWS & Developer Experience) to help design and build the platform from the ground up. This is a hands-on engineering role focused on AWS-native application development, internal developer platforms, agentic AI, automation, and engineering governance. You will create the tools, APIs, developer workflows, AI services, and platform capabilities that accelerate software delivery while embedding security, compliance, and operational excellence by default. Key Responsibilities Build cloud-native platform services, APIs, developer tooling, and automation on AWS. Design and develop AI-powered engineering capabilities using AWS Bedrock and agentic AI frameworks. Create reusable platform...
Contract Spy
Oct 07, 2026
Duration not stated
Senior Security Engineer at Flagstone, London, £Contract Rate
Contract Spy London, UK
What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work. Each definition shares a common thread: our unique culture. It’s our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth. That’s why we’re building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we can change the world of financial technology. And all it...
Contract Spy
Oct 06, 2026
Duration not stated
Senior Data Engineer at Hexaware Technologies UK Limited, London, £Contract Rate
Contract Spy London, UK
Mandatory Skillsets: Python, Snowflake, dBT, dremio, glue jobs, Apache iceberg, AWS,SQL Key Responsibilities: Architect and Develop : Contribute to the platform's architectural design and build integration, modelling, data persistence, and analytical systems. Data Pipelines : Implement, maintain, and test robust data pipelines. Metadata Management : Develop and manage metadata processes and tools. Performance Monitoring : Ensure the stability and performance of data pipelines. Data Quality : Implement tools for data curation, metadata management, and quality assurance. Collaboration : Engage with business and technology teams to align the platform with organizational goals. Preferred Technical Skills: Programming : 5+ years of experience in Python/Java. Cloud Expertise : Strong understanding of AWS services (eg, Lambda, Step Functions, ECS). Data Platforms : Hands-on experience with Snowflake and data stack technologies like...
Contract Spy
Oct 02, 2026
Duration not stated
Senior Full Stack Developer at Deloitte, London, £Contract Rate
Contract Spy London, UK
  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires...
Contract Spy
Sep 30, 2026
Duration not stated
Senior Cloud Engineer at Flagstone Group, London, £Competitive Rate
Contract Spy London, UK
Senior Cloud Engineer - Contract What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business - where smart people do their best work. Each definition shares a common thread: our unique culture. It's our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent - it takes a culture of kindness, respect, and growth. That's why we're building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we can change the world of financial technology. And all...
Contract Spy
Sep 30, 2026
Duration not stated
Senior Security Engineer at Flagstone, London, £Contract Rate
Contract Spy London, UK
What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work. Each definition shares a common thread: our unique culture. It’s our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth. That’s why we’re building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we can change the world of financial technology. And all it...
Contract Spy
Sep 29, 2026
Duration not stated
Principal Engineer at Mindera, Central London, £Contract Rate
Contract Spy London, England, United Kingdom
We are currently looking for an experience Principal Engineer to join us on a contract basis. This is a hybrid position and will require 3 days per week on client site in Central London. Requirements Role responsibilities: Define and drive technical strategy, architecture, and engineering standards across the Personalisation domain Design and deliver scalable systems supporting personalisation, search, recommendations, and ML-powered features Partner closely with Product, Data Science, and Design to deliver customer-centric solutions Lead and influence technical decision-making across multiple teams and platforms Mentor and support senior engineers, helping to raise the overall engineering capability Improve engineering quality, reliability, and productivity through best practices, tooling, and platform enhancemen Who You Are An experienced technical leader with a strong background in Java/Python and large-scale production systems...
Contract Spy
Sep 25, 2026
Duration not stated
Senior Full Stack Developer at Deloitte, London, £Contract Rate
Contract Spy London, UK
Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a solid understanding of...
Contract Spy
Sep 23, 2026
Duration not stated
Senior Security Engineer at Flagstone, London, £Contract Rate
Contract Spy London, UK
What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work. Each definition shares a common thread: our unique culture. It’s our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth. That’s why we’re building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we can change the world of financial technology. And all it...
Contract Spy
Sep 23, 2026
Duration not stated
Principal Salesforce Engineer at UST, London, £Contract Option
Contract Spy London, UK
Principal Salesforce Engineer London (Hybrid | 3 Days Onsite) Permanent | Fixed-Term Contract | Inside IR35 Contract   Build the Next Generation of Salesforce Solutions   We're seeking a Principal Salesforce Engineer to lead the design and delivery of scalable, secure, and high-performing Salesforce solutions within a leading Asset Management environment. Working closely with architects, product teams, and business stakeholders, you'll drive engineering excellence, shape platform strategy, and deliver innovative solutions leveraging modern Salesforce capabilities.   What You'll Bring: Deep expertise in Apex, Lightning Web Components (LWC), Salesforce Flows, and platform architecture. Strong experience delivering enterprise integrations using APIs, MuleSoft, and event-driven architectures. Proven track record driving engineering best practices, DevOps, CI/CD, automated testing, and code quality. Ability to translate...
Contract Spy
Sep 22, 2026
Duration not stated
Principal Engineer at Mindera, Central London, £Contract Rate (Outside IR35)
Contract Spy Central London, London, UK
We are currently looking for an experience Principal Engineer to join us on a contract basis. This is a hybrid position and will require 3 days per week on client site in Central London. Requirements Role responsibilities:   Define and drive technical strategy, architecture, and engineering standards across the Personalisation domain Design and deliver scalable systems supporting personalisation, search, recommendations, and ML-powered features Partner closely with Product, Data Science, and Design to deliver customer-centric solutions Lead and influence technical decision-making across multiple teams and platforms Mentor and support senior engineers, helping to raise the overall engineering capability Improve engineering quality, reliability, and productivity through best practices, tooling, and platform enhancemen   Who you are:   An experienced technical leader with a strong background in Java/Python...
Contract Spy
Sep 21, 2026
Duration not stated
Salesforce Technical Lead at UST, London, £Contract Rate
Contract Spy London, UK
Role description Salesforce Technical Lead London (Hybrid | 3 Days Onsite) Permanent | Fixed-Term Contract | Inside IR35 Contract   Shape the Future of Salesforce within the Asset Management Domain   We are looking for an experienced Salesforce Technical Lead to drive the design, delivery, and evolution of a strategic Salesforce platform within a leading Asset Management environment. This role combines hands-on engineering, technical leadership, and stakeholder engagement, offering the opportunity to lead enterprise-scale Salesforce initiatives while leveraging emerging capabilities such as Data Cloud, AI, and Agentforce.   What You'll Bring: Proven experience leading Salesforce development teams and delivering complex Salesforce programmes. Deep expertise in Apex, Lightning Web Components (LWC), Salesforce Flows, Visualforce, and API integrations . Strong understanding of Salesforce architecture, security,...
Contract Spy
Oct 07, 2026
Duration not stated
Lead Azure DevOps Engineer (SC eligible/SC Cleared) at Scrumconnect, London, £450-£500 per day (Outside IR35)
£450 - £500 per day
Contract Spy London, UK
Lead Azure DevOps Engineer ( SC eligible/ SC Cleared )    London, United Kingdom | Posted on 06/10/2026   About Scrumconnect Scrumconnect Consulting is a UK-based digital transformation consultancy delivering secure, scalable, and user-centred solutions across government and enterprise organisations. We specialise in agile delivery, cloud platforms, data, and modern engineering practices—helping clients build reliable services that meet high operational and compliance standards. Role Overview As a Lead Azure DevOps Engineer, you will be at the forefront of our infrastructure development, guiding our DevOps strategy and implementation within Azure environments. You will work closely with development teams to ensure efficient deployment and operation of applications, and lead the effort to automate and optimise our processes. This role suits a dynamic, proactive leader who is passionate about using cloud technologies to...
Contract Spy
Oct 07, 2026
Duration not stated
Technical Delivery Lead (SC Cleared) at Scrumconnect, London, £400-£450 per day (Outside IR35)
£400 - £450 per day
Contract Spy London, UK
Date Opened 06/10/2026 Job Type Contract Industry Government & Public Sector Work Experience 5+ years Salary 400-450 outside IR35 About Scrumconnect Consulting Scrumconnect Consulting is a leading UK digital and technology consultancy specialising in delivering impactful, user-centred services for the public sector. We work at the heart of government transformation, partnering with central government departments, agencies and local authorities to design and deliver digital products and services that make a real difference to citizens' lives. With a team of over 125 engineers, architects, delivery professionals and designers, we bring deep Government Digital Service (GDS) expertise, a strong delivery culture and a commitment to delivering high-quality outcomes the right way. We are proud that 42% of our organisation is women, and we continue to build diverse, inclusive teams that reflect the communities we serve. Role Overview We are looking...
Contract Spy
Oct 07, 2026
Duration not stated
kdb+ Contractor (Capital Markets) at Data Intellect, London, £Contract Rate
Contract Spy London, UK
Company Description Join the world’s largest kdb+ Consultancy where every query matters, every millisecond counts and every system you build shapes the future of data-driven finance. At Data Intellect , we thrive on solving complex data challenges in high-stakes environments. We’re a team of engineers, problem-solvers and collaborators who believe in pushing boundaries, not egos. If you're a proficient kdb+ developer ready to lead, innovate and make an impact, we want to hear from you. Job Description As a Senior kdb+ Engineer at [DI] you’ll be at the forefront of delivering high-performance, scalable solutions for some of the world’s most data-intensive financial institutions. You’ll: Lead technical delivery on client projects, setting the standard for quality and performance. Design and implement robust kdb+ architectures that handle billions of rows of time-series data. Collaborate with quants, traders,...
Contract Spy
Oct 06, 2026
Duration not stated
Data/MI Business Analyst (SC Cleared) at Scrumconnect, London, £400 per day (Outside IR35)
Contract Spy London, UK
Data / MI Business Analyst (SC Cleared)    London, United Kingdom | Posted on 05/10/2026   About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter. Overview We are looking for an experienced  Data / MI Business Analyst  to join our team and work closely with business stakeholders, technical teams, and data specialists. In this role, you will translate business and reporting needs into clear, well-defined requirements. You will...
Contract Spy
Oct 02, 2026
Duration not stated
Senior Solidity Engineer at Test Yantra, London/Remote, £400 per day
£400 per day
Contract Spy Hybrid (London, UK)
Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...
Contract Spy
Oct 01, 2026
Duration not stated
Tech Lead at Mindera, London, £Competitive Day Rate
Contract Spy London, UK
Mindera are currently looking for an experienced Tech Lead to operate within a Platform Enablement team in the retail sector. This will be a small team that looks after capabilities that are shared across products and channels. For this role, previous experience with CRMs is essential, ideally Clavio but not limited to. Requirements Strong software engineering expertise – deep backend development experience, building scalable APIs and microservices; broader experience with technologies such as Node.js, TypeScript or React is beneficial. Architecture & system design – proven ability to design and evaluate scalable services and integrations, applying appropriate architecture patterns while balancing product goals, security, reliability and long-term system health. Cloud, DevOps & Infrastructure as Code – hands-on experience building and operating cloud-native solutions in AWS, using modern CI/CD practices and Infrastructure...
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