15 senior platform engineer jobs found

Contract Senior Full Stack Go Engineer | Outside IR35 Rate: Circa £550-£600/day Contract Length: 3 months initially Location: Manchester (up to 2 days onsite) Hybrid Working We're supporting a fast-growing technology product business as they continue to scale their engineering function and invest heavily in the evolution of their flagship platform. This is an opportunity to join a highly talented engineering team working on a genuinely complex product used by customers across the globe. You'll have the chance to influence technical direction, work across the full stack, and solve challenging engineering problems in a business that values curiosity, ownership and innovation. What you'll be doing: Building and enhancing scalable backend services using Go Developing modern front-end applications using React Working with AWS cloud services and cloud-native architectures Contributing to technical design, architecture and engineering best practices...

Senior Machine Learning Engineer | Contract Role Outside IR35 | £600-700/day | Remote in the UK | Initial 3 Months We’ve partnered with a fast-growing tech business undergoing a major rebuild of one of their core platform capabilities. They’re looking for a Senior Machine Learning Engineer to help design and develop the modelling logic that underpins a critical decision-making system. This role sits at the intersection of machine learning, applied modelling, and software engineering - focused on solving complex, real-world problems rather than building standard predictive models. This is a hands-on role working within a small, high-impact team on a greenfield build, with direct input into how the system evolves over time. This is outside IR35, fully remote, with an initial 3-month contract and strong potential for extension. Key Responsibilities Design and build modelling logic that represents real-world rules, constraints, and pricing/cost...

Lead Data Engineer (BigQuery Consolidation, Migration & Architecture) – Contract Location: Hybrid - London Contract Length: Initial 4-week engagement with extension Day Rate: £700 per day (Outside IR35) Start Date: ASAP An ambitious, data-driven organisation is seeking a highly experienced Lead Data Engineer to assess and potentially lead the consolidation of a complex, fragmented data landscape into a single Google BigQuery platform. The business currently operates across multiple technologies and data warehouses, creating challenges around data consistency, reporting accuracy, and stakeholder trust. The objective is to establish a scalable, future-proof architecture that delivers a true single source of truth while supporting an AI-enabled data strategy. Initially, this will be a four-week exploratory engagement focused on validating the migration approach, identifying risks, and proving technical feasibility. For the right individual, there is...

AWS Security Engineer - Glasgow/Hybrid - Outside IR35 Market Rates Duration - 12 months Harvey Nash are supporting a client seeking an experienced AWS Security Engineer to join their IT Infrastructure and Cyber function. This is a lead role in designing, implementing, and optimising AWS security controls across a multi-account cloud environment. This role requires a strong blend of hands-on AWS security engineering and strategic design capability, supporting secure cloud adoption and ongoing platform maturity. Key Responsibilities The AWS Security Engineer will: Design secure AWS architectures, including IAM strategy, access models, logging, monitoring, and compliance controls Define secure hosting approaches across EC2, containerised workloads, and supporting services Establish and enhance identity and access management frameworks, including RBAC and least-privilege models Implement centralised logging, monitoring, and threat detection using AWS-native tooling...

Senior Data & ML Engineer Contract - Outside IR35 - Initial 6 month contract £650-£750 per day London - Hybrid working We are partnering with a rapidly growing financial services business that is investing heavily in its machine learning and data platform capabilities. This is a hands-on engineering role focused on helping Data Science teams build, deploy, and scale machine learning solutions in production. The work sits at the intersection of data engineering, machine learning engineering, and MLOps, with a strong focus on production systems, feature engineering, workflow orchestration, and model lifecycle management. What you'll be doing Design and build scalable data and feature engineering pipelines to support machine learning workloads Work closely with Data Scientists to operationalise models and improve the end-to-end machine learning lifecycle Develop and optimise PySpark-based data processing workflows and training pipelines Build and...

TrueNorth is working with a successful Tech company, and we're looking for a Senior Software Engineer who will lead development on complex web applications. Key skills: Java Spring Boot AWS React Mentor and support team members at all levels Collaborate with stakeholders This role will not just be about creating dashboards but more about driving the business on what they are building and what direction they should go in with the upcoming CRM/ERP migrations and the new build of a cloud-based platform. The roles are outside IR35 and have a rate of £550-600 per day. Given the urgency of the roles and projects, we do need everyone to be available either immediately or with circa 1 weeks notice. Please apply for more info and immediate consideration.

Lead Platform Engineer Python | Cloud | Terraform | IAM | DevOps | Infrastructure-as-Code (IaC) Rate: Circa £700–£800 per day (Outside IR35) Contract Length: 6 Months Location: London / Hybrid (2 days per week) Overview We are seeking an experienced Principal / Lead Engineer to join a highly ambitious organisation building a large-scale, mission-critical data and technology platform. This is a unique opportunity to join at the earliest stages of a major programme and play a key role in shaping its technical foundation. Working closely with the CTO and a small team of senior engineers, you will lead the design and implementation of core infrastructure, establish engineering standards and practices, and make architectural decisions that will have long-term strategic impact. If you enjoy solving complex technical challenges, influencing technology strategy, and creating robust engineering foundations, this role offers an exceptional opportunity to make a...

Senior z/Linux Engineer (RHEL/IBM Z) DURATION: Initial 6 months (likely extension) LOCATION: Leeds OR Edinburgh OR Manchester OR Halifax ONSITE REQUIREMENTS: Hybrid - 2 days onsite per week (local office) ENGAGEMENT TYPE: Outside IR35 DAY RATE: Market rates (Competitive) LEGAL RIGHT TO WORK: Candidates must have the legal right to work in the UK. Unfortunately, sponsorship is not available for this role. ATRIUM GLOBAL SUMMARY Atrium Global is supporting a client in the financial services sector in hiring a Senior z/Linux Engineer to join their Core Infrastructure Platform team within Mainframe Services. JOB OVERVIEW This role is focused on the support, stability and continuous improvement of enterprise Linux environments running on IBM Z. You will work across a highly regulated, mission-critical platform, primarily supporting RHEL-based z/Linux systems under z/VM. This is a Linux-first role, requiring strong hands-on system administration experience within enterprise...

Who are OnCommerce? OnCommerce is a global selling platform that powers a growing network of retail channels, including: OnBuy - The only marketplace in the world to give customers instant Cashback on everything easyShop - An all-new marketplace created in collaboration with the easy® family of brands Comet - The iconic UK tech brand making its return later this year OnCommerce is growing fast, launching new brands and scaling to power the future of ecommerce. Be Part of the Story OnCommerce is constantly evolving. Everyone here plays a hands-on role in shaping what comes next, building brands that make an impact across global markets. There’s no red tape or rigid corporate structure; just smart people taking ownership and figuring things out as we build something big together. The pace is fast, priorities shift, things aren’t always perfectly set up, and you’ll often need to get stuck in and solve problems. But if you thrive in that kind of...

Senior Software Engineer x2 - Outside IR35 - Contract (Media Client) About the role Essential: Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with) Skills & Experience: Backend: Java, Maven, Dropwizard Frontend: TypeScript, React Python AWS, OpenSearch It would be nice if you have AI coding experience, and ideally some familiarity with more traditional ML techniques for things like entity recognition £500-600 per day...

Cloud Security Engineer (GCP / IAM / Encryption) - Contract Rate: £600 day Outside IR35 Location: London - hybrid (3 days onsite) - Non negotable Duration: 12 month Clearance: Active SC, willingness for DV Overview Join a high-impact programme delivering secure, large-scale cloud infrastructure within a UK government environment. You'll help design and secure a private/distributed cloud platform supporting critical national services. Key Responsibilities Design & implement secure workloads in Google Distributed Cloud (GDC) / GCP (GDC experience not necessarily needed but would be strongly desired) Build and manage IAM architectures (SSO, MFA, privileged access lifecycle) Enforce least privilege via resource hierarchies, policies, and constraints Configure network security controls (firewalls, WAF, service perimeters) Deliver data protection & encryption (KMS, CMEK/EKM, sensitive data handling) Secure CI/CD pipelines with vulnerability scanning and...

Cloud Security Engineer (GCP/IAM/Encryption) - Contract Rate: £600 day Outside IR35 Location: London - hybrid (3 days onsite) - Non negotable Duration: 12 month Clearance: Active SC, willingness for DV Overview Join a high-impact programme delivering secure, large-scale cloud infrastructure within a UK government environment. You'll help design and secure a private/distributed cloud platform supporting critical national services. Key Responsibilities Design & implement secure workloads in Google Distributed Cloud (GDC)/GCP (GDC experience not necessarily needed but would be strongly desired) Build and manage IAM architectures (SSO, MFA, privileged access life cycle) Enforce least privilege via resource hierarchies, policies, and constraints Configure network security controls (Firewalls, WAF, service perimeters) Deliver data protection & encryption (KMS, CMEK/EKM, sensitive data handling) Secure CI/CD pipelines with vulnerability scanning and policy...

Senior Software Engineer - Outside IR35 - Contract (Insurance) About the role Essential: Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with) Frontend: React + TypeScript + Vite Material UI with Emotion for styling TanStack React Query 5 for server state React Router 7 React Hook Form+Yup for forms/validation MSAL for Entra ID auth Jest+Testing Library for unit tests; Playwrightfor E2E and visual tests Hosted as an Azure Static...

£700 per day, Outside IR35 Immediate Start - ASAP 3 months with potential to extend Remote - may require occasional travel to client offices (Stevenage) My client is looking for a Salesforce Architect with strong, hands-on Jitterbit experience to join their team on an integration-focused engagement, working closely with the CTO, non-technical programme/platform leads, and delivery architects and engineers to build trust and drive momentum across the organisation. Key scope and expectations Act as technical lead and integration technical SME across an integration platform RFI/RFP, assessing options and fit with organisational needs A deep and proven track record of advising and agreeing strategy, options and roadmap with C-Suite stakeholders, having built strong trust-based relationships with multiple technical and non-technical C-Suite stakeholders Facilitate and produce agreed enterprise and platform architecture artefacts (e.g. platform models, capability mappings,...

£700 per day, Outside IR35 Immediate Start - ASAP 3 months with potential to extend Remote - may require occasional travel to client offices (Stevenage) My client is looking for a Salesforce Architect with strong, hands-on Jitterbit experience to join their team on an integration-focused engagement, working closely with the CTO, non-technical programme/platform leads, and delivery architects and engineers to build trust and drive momentum across the organisation. Key scope and expectations Act as technical lead and integration technical SME across an integration platform RFI/RFP, assessing options and fit with organisational needs A deep and proven track record of advising and agreeing strategy, options and roadmap with C-Suite stakeholders, having built strong trust-based relationships with multiple technical and non-technical C-Suite stakeholders Facilitate and produce agreed enterprise and platform architecture artefacts (eg platform models, capability mappings,...