7 results for Seniorlead Full Stack Developer React Python Ai Start Up in London, London, City of

Principal Developer

London, London
remote
Permanent
85000 - 95000 GBP / Yearly
Principal Developer - React, NestJS, Azure, JavaHybrid, London | 6-Month FTC | £85k-£95k DOERobert Half are working with a leading client who are an innovative leader in tech-driven solutions, and are seeking a Principal Developer for a 6-month fixed-term contract to join their IP Development team in London (hybrid). This is a unique opportunity to provide senior technical leadership, drive architectural strategy, and ensure technical excellence across high-impact projects during the sabbatical of the permanent postholder.Key Responsibilities:<ul><li>Set architectural direction for modern web applications using React, NestJS, Azure, and Java.</li><li>Define and uphold engineering standards for performance, scalability, availability, and resilience.</li><li>Guide cross-functional teams in technical strategy, integration, and security.</li><li>Drive innovation through AI, DevTools, and emerging technologies-validating and integrating proof of concepts.</li><li>Oversee shared platform components, ensuring quality, reliability, and reusability.</li><li>Mentor senior engineers and lead root-cause analysis of critical issues.</li></ul>About you:<ul><li>Significant experience in technical leadership roles with a focus on architecture and platform governance.</li><li>Proficiency in TypeScript stacks (React, NestJS), cloud platforms (Azure), and familiarity with Java.</li><li>Proven track record of delivering scalable, maintainable solutions in complex environments.</li><li>Skilled in cross-team collaboration, technical reviews, and stakeholder management.</li><li>Strong analytical and mentoring abilities.</li></ul>Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/Q2FsbHVtLlNhdW5kZXJzLjg3NzIxLjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-03-17T16:50:31Z

CTO - Chief Technology Officer

London, London
remote
Temporary
- GBP / Yearly
Robert Half Technology are assisting a leading UK legal firm to recruit a Chief Technology Officer (CTO) on a contract basis. Outside IR35. UK-based remote working with occasional stakeholder sessions.Role * The CTO will lead the assessment, design, and implementation of the firm's cloud and data platforms. * Provide Board-ready recommendations on cloud strategy (Azure vs GCP) and data architecture. * Design and implement a modern cloud data platform with Databricks as the core analytics and AI layer. * Build a production-ready lakehouse architecture optimised for analyst-led use. * Implement secure, scalable ingestion pipelines for structured, unstructured, text-based, and geospatial data. * Balance performance, security, cost, and operational simplicity across the platform. * Provide knowledge transfer, documentation, and guidance to enable internal teams to operate and extend the platform.Profile * Proven hands-on experience delivering cloud-based analytics platforms end to end. * Strong expertise in Azure and GCP, including Databricks implementation. * Deep understanding of lakehouse architectures, data engineering, and analytics design. * Experience with large datasets, NLP/AI workloads, and geospatial data. * Strong security, governance, and access control design experience. * Excellent communication skills with the ability to produce clear technical documentation and senior stakeholder recommendations.Company * Leading UK legal firm * Remote-first with occasional onsite or virtual stakeholder sessionsSalary & Benefits The day rate / contract value is dependent upon experience, qualifications, and engagement structure.Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/QWxmaWUuUm93ZXR0LjIwNTAxLjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-01-20T18:31:24Z

Senior QA Engineer (Innovative TechFirm!)

London, London
remote
Permanent
55000 - 60000 GBP / Yearly
Are you a solutions-focused Senior QA Engineer with strong experience in Selenium, Java, C#, or Python? Do you want to be part of an ambitious, innovative company experiencing rapid growth? This organisation grew headcount by 35% last year and has major plans for 2026/2027.This role is based in WEST LONDONTHIS IS A NUMBER 1 Role in the Software Dev team and offers a Senior QA Engineer full influence to drive the platform and company forward. This is a well-established global business with a modern tech culture, offering the chance to work on large greenfield projects and make a real impact from day one.<h2 data-start="571" data-end="587">Why This Role</h2><ul data-start="588" data-end="789"><li data-end="628" data-start="588">Work on major greenfield initiatives</li><li data-end="675" data-start="629">Join a company making a genuine difference</li><li data-start="676" data-end="730">Strong career progression in a fast-growing sector</li><li data-end="789" data-start="731">Hybrid: 3 days in the West London HQ, 2 days from home</li></ul><h2 data-start="791" data-end="823">What the Hiring Manager Wants</h2>Someone who:<ul data-end="1072" data-start="837"><li data-end="867" data-start="837">Can hit the ground running</li><li data-end="930" data-start="868">Has strong manual and automation experience (BDD required)</li><li data-start="931" data-end="981">Can work effectively in a small, hands-on team</li><li data-end="1021" data-start="982">Communicates well with stakeholders</li><li data-start="1022" data-end="1072">Enjoys problem-solving and improving processes</li></ul><h2 data-end="1091" data-start="1074">About the Role</h2>This is a NUMBER 1 role in the QA Team and you will be working on a market-leading global analytics platform. The role is around 50% Manuel and 50% automation with a mix of UI and API testing.<h2 data-end="1271" data-start="1248">Key Responsibilities</h2><ul data-start="1272" data-end="1591"><li data-end="1338" data-start="1272">Define acceptance criteria and embed quality early in the SDLC</li><li data-start="1339" data-end="1402">Perform exploratory and automated testing across API and UI</li><li data-end="1450" data-start="1403">Build and maintain automated test scenarios</li><li data-end="1484" data-start="1451">Create and manage bug reports</li><li data-end="1538" data-start="1485">Support unit, integration, and end-to-end testing</li><li data-start="1539" data-end="1591">Work with deployment teams and resolve CI issues</li></ul><h2 data-start="1593" data-end="1608">Requirements</h2><ul data-end="1801" data-start="1609"><li data-end="1650" data-start="1609">8+ years' experience in QA Automation</li><li data-end="1690" data-start="1651">Strong manual and automation skills</li><li data-end="1728" data-start="1691">Experience in Python, Java, or C#</li><li data-start="1729" data-end="1764">UI and API automation knowledge</li><li data-start="1765" data-end="1801">Cross-functional team experience</li></ul><h2 data-start="1803" data-end="1814">Benefits</h2><ul data-start="1815" data-end="1939"><li data-end="1834" data-start="1815">25 days holiday</li><li data-end="1848" data-start="1835">10% bonus</li><li data-end="1871" data-start="1849">Private healthcare</li><li data-end="1883" data-start="1872">Pension</li><li data-start="1884" data-end="1906">Training allowance</li><li data-start="1907" data-end="1939">Enhanced holiday entitlement</li></ul><h2 data-end="1961" data-start="1941">Interview Process</h2>Two stages on Zoom. No test. Quick turnaround.Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/dG9ueS5rb3lyYXR0eS4yODkyOC4xMDkyM0ByaGkuYXBsaXRyYWsuY29t.gif">
2026-03-09T13:33:31Z

Head of Business Systems (FTSE 250) -D365/Power Platform

City of London, London
remote
Permanent
- GBP / Yearly
<h3 data-end="209" data-start="157">Head of Systems Innovation - Microsoft Stack</h3>Central London | HybridPerm RoleHigh Bonus on offer!Robert Half Ltd is partnering with a leading London-based business to hire a Head of Systems Innovation to own and evolve their Microsoft business platforms for a leading FTSE 250 company! This is a senior, hands-on leadership role with real ownership - not a legacy clean-up, not vendor management theatre.<h3 data-start="528" data-end="557">What actually matters</h3>You must be strong in:<ul data-end="749" data-start="581"><li data-end="632" data-start="581">Dynamics 365 (CE and/or Finance & Operations)</li><li data-start="633" data-end="693">Power Platform (Power Apps, Power Automate, Dataverse)</li><li data-end="749" data-start="694">Power BI (analytics, reporting, business insight)</li></ul>You'll lead platform strategy, set standards, and ensure these systems genuinely support the business as it scales.<h3 data-end="896" data-start="868">What you'll be doing</h3><ul data-end="1198" data-start="897"><li data-end="939" data-start="897">Owning and improving the D365 estate</li><li data-end="994" data-start="940">Driving delivery across Power Platform solutions</li><li data-end="1056" data-start="995">Ensuring data and reporting are meaningful via Power BI</li><li data-end="1104" data-start="1057">Leading and mentoring a small specialist team</li><li data-start="1105" data-end="1198">Working closely with senior stakeholders to translate business needs into systems that work</li></ul><h3 data-start="1200" data-end="1222">Who this suits</h3><ul data-start="1223" data-end="1409"><li data-end="1259" data-start="1223">A senior Microsoft platform leader</li><li data-start="1260" data-end="1306">Comfortable balancing strategy with delivery</li><li data-start="1307" data-end="1352">Pragmatic, commercial, and outcomes-focused</li><li data-end="1409" data-start="1353">Experienced in complex, multi-stakeholder environments</li></ul>London | Hybrid Interested? then Apply now! Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/dG9ueS5rb3lyYXR0eS45NDYxOC4xMDkyM0ByaGkuYXBsaXRyYWsuY29t.gif">
2026-01-20T20:52:14Z

Senior Data Engineer

London, London
remote
Temporary
- GBP / Yearly
Robert Half Technology are assisting a market-leading real estate business to recruit a Senior Data Engineer on a 6-month contract basis. Outside IR35. Hybrid working - 2 days per week on-site initially. London based. <h3 data-start="460" data-end="472">Role</h3><ul data-end="1310" data-start="473"><li data-end="609" data-start="473">The Senior Data Engineer will assess, design, and implement data infrastructure to ensure scalability, reliability, and performance.</li><li data-start="610" data-end="701">Review existing architecture, recommend improvements, and implement hands-on solutions.</li><li data-start="702" data-end="809">Collaborate with junior data engineers to provide guidance, create roadmaps, and support data strategy.</li><li data-end="940" data-start="810">Collect, transform, and process datasets from multiple sources, including current CRM, legacy CRM, and data from acquisitions.</li><li data-end="1014" data-start="941">Ensure data quality, integrity, and consistency across all platforms.</li><li data-start="1015" data-end="1110">Develop efficient data pipelines using SQL Server, Azure Data Factory (ADF), and DBT Cloud.</li><li data-start="1111" data-end="1225">Support analytics and reporting workflows, feeding data into Snowflake and Power BI.</li><li data-start="1226" data-end="1310">Stay updated with industry trends and emerging technologies in data engineering.</li></ul><h3 data-end="1332" data-start="1317">Profile</h3><ul data-start="1333" data-end="1921"><li data-end="1389" data-start="1333">5+ years of hands-on experience in data engineering.</li><li data-start="1390" data-end="1579">Expertise in:<ul data-start="1410" data-end="1579"><li data-start="1410" data-end="1427">Snowflake</li><li data-start="1430" data-end="1462">Azure Data Factory (ADF)</li><li data-end="1482" data-start="1465">DBT Cloud</li><li data-start="1485" data-end="1518">SQL / ETL transformations</li><li data-end="1579" data-start="1521">Power BI </li></ul></li><li data-end="1659" data-start="1580">Comfortable working with legacy systems and multiple, complex data sources.</li><li data-end="1724" data-start="1660">Proven ability to review and improve existing architectures.</li><li data-end="1817" data-start="1725">Strong problem-solving and analytical skills, with meticulous attention to data quality.</li><li data-end="1921" data-start="1818">Collaborative mindset with the ability to guide junior team members and create practical solutions.</li></ul><h3 data-end="1943" data-start="1928">Company</h3><ul data-start="1944" data-end="2080"><li data-start="1944" data-end="2011">Leading real estate business with a strong data-driven culture.</li><li data-start="2012" data-end="2080">Data team focused on analytics, reporting, and data engineering.</li></ul><h3 data-start="2087" data-end="2112">Salary & Benefits</h3><ul data-start="2113" data-end="2261"><li data-start="2113" data-end="2177">Competitive day rates, dependent upon experience and skills.</li><li data-start="2178" data-end="2261">6-month contract, Outside IR35, hybrid working with an opportunity for remote in the future. </li></ul>Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/QWxmaWUuUm93ZXR0LjgxMjE0LjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-01-27T12:33:47Z

IT Director

London, London
remote
Contract
- GBP / Yearly
Robert Half Technology are assisting a market leading PE-backed facilities organisation to recruit a Interim IT Director on an initial 8-12 month contract basis. Objectives (8-12-Month Outcomes)The Interim IT Director will be accountable for designing and executing a transformation roadmap, delivering tangible improvements across cost, service quality, resilience, and commercial value.<ol><li> Digital Transformation & Value Creation</li></ol><ul><li>Design and execute a clear, prioritised digital transformation plan aligned to the PE value-creation strategy.</li><li>Translate technology initiatives into commercial outcomes (cost reduction, productivity, service improvement, scalability).</li><li>Establish clear governance, milestones, and success metrics within the business.</li></ul><ol start="2"><li> Automation, AI & Process Efficiency</li></ol><ul><li>Identify and deliver automation and AI opportunities that reduce manual effort, improve speed, and enhance customer and internal service experience.</li><li>Simplify and streamline core business processes, removing friction and failure points.</li></ul><ol start="3"><li> Outsourced IT Review & Supplier Reset</li></ol><ul><li>Conduct a rapid but thorough review of the current outsourced IT model (including Aura).</li><li>Address poor service levels, slow response times, and lack of value for money.</li><li>Redesign the sourcing strategy: renegotiate, replace, or re-tender providers as required.</li><li>Deliver cost transparency, improved SLAs, and materially better service quality.</li><li>Resolve issues around overpriced, second-hand equipment and long lead times.</li></ul><ol start="4"><li> IT Security & Risk Management</li></ol><ul><li>Assess and remediate cyber and operational security risks.</li><li>Ensure the business meets an appropriate level of security maturity for a PE-backed organisation preparing for exit.</li><li>Put in place pragmatic, proportionate controls and incident response capability.</li></ul><ol start="5"><li> Data & Analytics Capability</li></ol><ul><li>Improve access to reliable management information and analytics.</li><li>Enable data-driven decision-making across the executive team.</li><li>Define a realistic roadmap for analytics maturity aligned to business need.</li></ul><ol start="6"><li> IT Procurement & Commercial Control</li></ol><ul><li>Establish disciplined IT procurement processes.</li><li>Ensure technology spend is justified, benchmarked, and ROI-led.</li><li>Introduce stronger commercial management of vendors and contracts.</li></ul><ol start="7"><li> Build a Fit-for-Purpose IT Function</li></ol><ul><li>Design and implement an appropriate target operating model for IT, balancing in-house capability and outsourced services.</li><li>Clarify roles, accountability, and governance.</li><li>Upskill or reshape the existing IT Manager role as part of a sustainable future-state function.</li></ul><ol start="8"><li> Core Systems & Operating System Remediation</li></ol><ul><li>Address critical system instability, including replacement of the unsupported operating system (in place since November 2015).</li><li>Build a robust business case for change, clearly articulating risk, cost, ROI, and implementation roadmap.</li><li>Reduce system failures and downtime, improving operational resilience.</li></ul><ol start="9"><li> Exit Readiness</li></ol><ul><li>Ensure all initiatives support the broader objective of maximising valuation and exit readiness for summer 2027.</li><li>Improve technology due-diligence readiness, documentation, resilience, and scalability.</li><li>Leave behind a clear technology roadmap that extends beyond the interim engagement.</li></ul>Profile Type<ul><li>Proven Interim IT Director / Technology Transformation Lead experience in PE-backed or highly commercial environments.</li><li>Strong track record of fixing underperforming outsourced IT models.</li><li>Commercially astute, able to build ROI-led business cases and challenge spend.</li><li>Hands-on, delivery-focused, and credible at board and CEO level.</li><li>Comfortable operating in ambiguity and moving at pace.</li></ul>Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/S2F6aW0uSGFzc2FuLjU3NDAxLjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-01-20T13:38:00Z

DevOps Engineer

London, London
remote
Contract
- GBP / Yearly
Robert Half Technology are assisting a market leading insurance organisation to recruit a DevOps Engineer on an 6 month contract basis. London based - hybrid working Role<h3 data-end="1152" data-start="1113">DevOps & CI/CD for Data Platforms</h3><ul><li>Design, build, and maintain CI/CD pipelines (primarily in Azure DevOps) for deployment of Snowflake objects (SQL scripts, stored procedures, roles, schemas, DBT transformations).</li><li>Implement Infrastructure as Code (IaC) and automated database change management processes.</li><li>Drive DevOps best practices across the data lifecycle (branching strategies, automated testing, release governance).</li></ul><h3 data-start="1553" data-end="1589">Snowflake Platform Engineering</h3><ul><li>Administer and support Snowflake across development, test, and production environments.</li><li>Manage warehouses, databases, schemas, roles, and access structures.</li><li>Implement structured role hierarchies and RBAC aligned to enterprise security policies.</li><li>Oversee secrets management and secure configuration practices.</li></ul><h3 data-start="1915" data-end="1942">Security & Compliance</h3><ul><li>Implement and manage security controls including RBAC, SSO, MFA, encryption, and data masking.</li><li>Ensure compliance with internal governance and regulatory standards.</li><li>Support audit requirements and access reporting.</li></ul><h3 data-start="2169" data-end="2220">Monitoring, Reliability & Incident Management</h3><ul><li>Implement monitoring and alerting for Snowflake and associated pipelines.</li><li>Act as the primary escalation point for data pipeline failures and platform incidents.</li><li>Troubleshoot performance, networking, and integration issues across Azure and Snowflake.</li><li>Maintain artefact repositories and resolve tooling issues (e.g., certificate renewals, Snyk, SonarQube).</li></ul><h3 data-start="2593" data-end="2630">Performance & Cost Optimisation</h3><ul><li>Monitor query performance and optimise warehouse configuration.</li><li>Proactively manage Snowflake credit usage and storage costs.</li><li>Provide recommendations to improve platform scalability and efficiency.</li></ul>Profile <ul><li>Strong experience as an Azure DevOps Engineer supporting cloud-based data platforms.</li><li>Hands-on experience building and managing CI/CD pipelines in Azure DevOps (or similar tooling).</li><li>Strong SQL expertise and experience deploying database objects via automated pipelines.</li><li>Proven experience administering Snowflake in multi-environment enterprise setups.</li><li>Experience working closely with Data Engineering teams in modern analytics environments.</li><li>Solid understanding of RBAC, secrets management, and secure design principles.</li><li>Familiarity with monitoring, logging, and troubleshooting in Azure-based environments.</li><li>Experience with DBT for transformation workflows.</li></ul> Company<ul><li>Market leading insurance organisation </li><li>global presence with offices in London </li><li>hybrid working </li></ul>Salary & Benefits company, depending on experience The salary range/rates of pay is dependent upon your experience, qualifications or training.Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: roberthalf.com/gb/en/privacy-notice.<img src="https://counter.adcourier.com/S2F6aW0uSGFzc2FuLjU0NTIxLjEwOTIzQHJoaS5hcGxpdHJhay5jb20.gif">
2026-02-26T09:30:57Z