1 to 25 of 102 Contract SaaS Jobs in the UK

a strategic data centre hosting contract approaching in Summer 2027, our client is accelerating plans to modernise their estate - migrating a large, mixed portfolio of applications to cloud or SaaS platforms. This is a critical programme of work focusing on mainframe, open systems (AIX, Solaris, Linux, Windows), and SQL Server-based applications. You'll work closely with SMEs across multiple … including AWS and Azure. Key Responsibilities Lead architectural assessment and strategy for migrating legacy and mainframe applications to cloud platforms. Evaluate applications for multiple migration paths: decommissioning, replatforming, rewriting, SaaS replacement, or mainframe lift-and-shift. Analyse technical stacks and integrations (CICS COBOL, IMS, VSAM, QSAM, relational databases, flat file systems). Collaborate with application and infrastructure SMEs to define … estimation, sizing, and performance projections. Ensure alignment with cloud best practices and enterprise standards. Ideal Candidate Profile Proven experience as an Infrastructure Architect delivering on-prem to cloud and SaaS migrations in complex enterprise environments. Deep understanding of mainframe architectures, particularly CICS, COBOL, IMS, batch/online hybrid systems. Hands-on experience assessing legacy workloads and determining appropriate cloud-native More ❯

based applications using the Spring Boot framework* Build and maintain containerised solutions on OpenShift* Design and implement scalable microservices and APIs* Collaborate with internal teams and external vendors, including SaaS providers* Contribute to the design and implementation of security architecture, including integration with HSMs* Capture and analyse business requirements, translate them into technical specifications* Support application testing, release and maintenance … Boot and microservices architecture* Hands-on experience with OpenShift or similar container orchestration platforms* Previous experience working in banking/financial services, with a focus on payments* Understanding of SaaS solutions and integration with external vendors* Familiarity with security architecture and cryptographic components, including HSMs* Experience working with at least one major cloud provider (Azure, AWS or GCP)* Strong grasp More ❯

Job Summary: We are seeking an experienced Azure Consultant to help design, implement, and manage cloud-based solutions using Microsoft Azure. The ideal candidate will have deep technical expertise in Azure services, strong problem-solving skills, and the ability to More ❯

Job Summary: We are seeking an experienced Azure Consultant to help design, implement, and manage cloud-based solutions using Microsoft Azure. The ideal candidate will have deep technical expertise in Azure services, strong problem-solving skills, and the ability to More ❯

performance tuning. Skilled in API development, microservices architecture, and messaging queue implementation. Strong understanding of supply chain systems and barcode-driven processes. Proven background in building secure, multi-tenant SaaS platforms. Interested?! Send your up-to-date CV to Dean Sadler-Parkes at Crimson for review Not interested?! Do you know anyone that might be? Refer a friend for this More ❯

performance tuning. Skilled in API development, microservices architecture, and messaging queue implementation. Strong understanding of supply chain systems and barcode-driven processes. Proven background in building secure, multi-tenant SaaS platforms. Interested?! Send your up-to-date CV to Dean Sadler-Parkes at Crimson for review Not interested?! Do you know anyone that might be? Refer a friend for this More ❯

Inside IR35) A growing digital technology provider supporting enterprise infrastructure and critical national services is seeking an experienced Front-End Developer to help evolve a cutting-edge geospatial SaaS platform. You'll join a team building scalable features across web and mobile interfaces using Blazor, .NET 8+, DAPR, and microservices in Azure and AWS-all within a modern, cloud-native More ❯

modelling, risk assessments, and security architecture reviews Collaborate with engineering, DevOps, and compliance teams to embed security best practices Define and enforce security standards across Azure IaaS, PaaS, and SaaS environments Essential Skills & Experience: Strong background in Azure security architecture Hands-on experience with Microsoft Sentinel or other enterprise SIEM platforms Deep understanding of Azure security services (e.g. Defender for More ❯

Backend Software Developer 6 months | Hybrid | Greenfield | £400 outside IR35 Join a dynamic software house on an exciting greenfield SaaS project as a Backend Software Developer . You’ll be part of a collaborative team building modern, scalable microservices from scratch using the latest Microsoft stack. The environment is fast-paced, commercially driven, and offers the opportunity to step into More ❯

Software Engineer/JavaScript/AWS/SaaS/Oracle Simphony Outside IR35 Contract Role Role: Software Engineer Salary: £600 a day Location: Fully Remote Duration: 3 months initial Software Engineer/JavaScript/AWS/SaaS/Oracle Simphony Responsibilities Design, code, test and manage various applications Experience developing SaaS/Software products Debug code Collaborate with engineering team … with experience in JavaScript & Oracle Simphony we are looking for then please do not hesitate to apply or send your cv directly Software Engineer/JavaScript/AWS/SaaS/Oracle Simphony More ❯

years of experience in technical writing, ideally in a software development environment. Strong experience using Confluence for collaboration and documentation. Solid understanding of cloud computing concepts (IaaS, PaaS, SaaS). Familiarity with .NET desktop application development and modern cloud technologies (e.g., Azure, AWS, or GCP). Comfortable working in an Agile/SCRUM environment. Excellent written and verbal communication skills More ❯

Robert Half Technology are assisting a rapidly growing SaaS organisation to recruit a CTO on a contract basis - London based - start ASAP As CTO, you will be a key member of the executive leadership team, responsible for driving the overall technology strategy and ensuring that our product and platform continue to scale securely, reliably, and innovative. You'll play a … teams, including reporting to the board and investors. Profile The CTO will have proven experience as a senior technology leader (CTO, VP Engineering, or similar) within a high-growth SaaS environment. Strong software engineering background with hands-on knowledge of modern web technologies, cloud infrastructure (AWS, Azure, or GCP), and best practices in DevOps and CI/CD. Deep understanding … Commercial acumen and the ability to align technical decisions with business impact. Excellent communication skills with the ability to influence both technical and non-technical stakeholders. Company Rapidly growing SaaS organisation with offices in London On site required Outside IR35 Salary & Benefits The salary range/rates of pay is dependent upon your experience, qualifications or training . Robert Half More ❯

Experience - Insurance or FinTech or Banking £800 - £1400 p/d - Umbrella engagement - 6 - 12 month contract London or Hampshire based 2/3 days per week Champion modular SaaS adoption, API-first design, and cloud-native principles. Overview: To lead the design and delivery of our clients go-to digital and data platform for a key business area, using … modular SaaS architecture - and the development of the in-house solution design and engineering capability required to scale and migrate customers and colleagues to the new platform and ways of working. This role will bridge business goals and technical execution ensuring architectural integrity, engineering excellence, and alignment with strategy and enterprise-wide transformation objectives. Core elements of the role: Define … and own the solution architecture and platform tech and data design, aligned with business transformation goals and enterprise architecture principles. Architect a composable platform using best-of-breed SaaS solutions, microservices, and event-driven architecture. Champion modular SaaS adoption, API-first design, and cloud-native principles.Oversee integration strategies (e.g., iPaaS, APIs, messaging) to ensure seamless data and process flows Collaborate More ❯

is embedded throughout the technology stack Support security design activities within major transformation programmes and new product initiatives Engage in security reviews of third-party vendors, cloud providers, and SaaS platforms to validate compliance with the client’s security standards Assist in threat modelling, risk assessments, and documenting security controls across infrastructure and application layers Participate in incident response efforts More ❯

A Council in London are seeking a Platform Specialist to ensure the day to day running of the Council production servers, operating system, cloud environments, Office 365 collaboration applications, SAAS applications, Council's network, backups and internet security infrastructure while ensuring high levels of systems availability. Requirements The post holder will act as a subject matter expert in their expertise More ❯

A Council in London are seeking a Platform Specialist to ensure the day to day running of the Council production servers, operating system, cloud environments, Office 365 collaboration applications, SAAS applications, Council's network, backups and internet security infrastructure while ensuring high levels of systems availability. Requirements The post holder will act as a subject matter expert in their expertise More ❯

testing workstream of a critical enterprise integration programme. This is a hands-on role requiring a strategic thinker who can drive quality across complex integrations between cloud-based systems, SaaS platforms, and on-premise applications. You will define and own the test strategy across system, integration, and UAT phases—ensuring robust data flows, exception handling, and end-to-end functionality. More ❯

CE Product Owner - Looking for a seasoned Senior/Lead Dynamics 365 Product Owner to play a pivotal role in a large-scale transition to a cloud-first, SaaS-based technology environment built on Azure. This position will focus on utilising Dynamics 365 as a foundation system to streamline critical business operations. Role & Responsibilities Lead and own the Dynamics More ❯

technology) Experience Required: Expert-level knowledge and experience with technical deployments of exposure/vulnerability management systems for large enterprises, across a diverse technology stack (IaaS/PaaS/SaaS/physical/mainframe/hybrid-cloud) and delivery lifecycles (Project/COTS applications, DevOps) Expertise with Qualys and other vulnerability and exposure management technologies Expertise in the full vulnerability More ❯

technology) Experience Required: Expert-level knowledge and experience with technical deployments of exposure/vulnerability management systems for large enterprises, across a diverse technology stack (IaaS/PaaS/SaaS/physical/mainframe/hybrid-cloud) and delivery lifecycles (Project/COTS applications, DevOps) Expertise with Qualys and other vulnerability and exposure management technologies Expertise in the full vulnerability More ❯

Proven experience (typically 5-10 years) as an Enterprise Cloud Architect with hands on experience in Azure and GCP Deep understanding of cloud computing concepts including IaaS, PaaS and SaaS Expertise in designing and implementing hybrid multi cloud solutions including appropriate Identity and Access Management options Experience of TOGAF and Zachman methodologies Knowledge of Infrastructure as Code tools (e.g. Terraform More ❯

is ideal for a backend engineer with strong Python experience and exposure to cloud environments. You’ll work on scalable APIs, data systems, and microservices powering a widely-used SaaS product. Must-haves : Solid Python development experience (essential) Experience with cloud platforms GCP, AWS, or Azure all welcome Comfortable working with RESTfulAPIs (FastAPI, Flask, or similar) Awareness of MongoDB or More ❯

Technical Solution Designer - Integrations - (SaaS, API) - Remote (some travel) Day rate: £500 - £600 (inside IR35) Duration: 3 - 6 months Start: ASAP Offices: London, Bristol, Manchester My client is looking for a highly skilled Systems Solution Designer to join our dynamic team. This role is crucial in defining and mapping how various platforms link together to drive a seamless experience and … Bachelor's degree in Computer Science, Information Technology, or a related field. Proven experience as a Solution Designer or similar role. Strong technical acumen with a solid understanding of SaaS, APIs, cloud computing (AWS, Azure), and financial/accounting technologies. Experience with APIs, web services, middleware, and API tools and technologies such as GitHub, REST API, microservices, Postman, OpenAPI, etc. More ❯

and efficient workflow solutions. Youll be instrumental in shaping architectural decisions and supporting the successful delivery of product features. Key Responsibilities Design and deploy custom workflow solutions using Camunda SaaS Build and configure Camunda Postgres connectors, job workers, service tasks, and user tasks Lead open-source delivery initiatives and support internal project teams Collaborate with engineering, product, and business teams More ❯

on a solution where you will be developing new web apps and AI-based analysis tools. The solution will need to be built with a combination of Microsoft Azure SaaS services (Function Apps, Azure SQL, Storage Accounts, Azure OpenAI, AI Search) custom code written in Python for server-side code, and custom HTML/CSS/JS + React for More ❯