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Senior Software Engineer (Contract) | AI/ML, Cloud & Backend
Contract: Initial 6 Months
Location: London (Hybrid – 3 Days Onsite Minimum)
Start Date: ASAP
Engagement: Full-Time Contract
IR35: Outside
Rate: £500-£600 per day
We’re working with a highly regarded enterprise software business seeking a Senior Platform Engineer to support a major phase of product and platform delivery.
This is a hands-on contract role for a senior engineer who can quickly integrate into an established engineering function and contribute from day one across backend engineering, cloud infrastructure, platform architecture and AI/ML-enabled product initiatives.
You’ll work closely with engineering leadership and cross-functional teams to help deliver critical roadmap objectives, contributing directly to the design, build, deployment and optimisation of production systems used by enterprise customers.
The Opportunity
This engagement combines backend engineering, platform infrastructure, cloud architecture and enterprise integrations, with opportunities to support AI/ML feature development, data analysis and visualisation depending on project needs.
We’re looking for someone who combines strong technical depth with excellent product judgement — someone who understands when to invest in long-term engineering foundations and when speed of execution matters most.
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This is a highly collaborative environment where engineering, product and delivery work closely together to solve complex business challenges.
Responsibilities
- Design, build, test, deploy and optimise production-grade digital systems
- Contribute to backend services, APIs and platform architecture
- Work closely with engineering leads to deliver against key product milestones
- Deploy and operate distributed systems across multi-cloud environments
- Build enterprise-grade integrations with third-party APIs and SDKs
- Implement authentication, authorisation and provisioning workflows
- Design secure access control, policy enforcement and audit capabilities
- Support AI/ML feature development, data workflows and visualisation where required
- Improve system scalability, reliability, observability and performance
Required Experience
We’re looking for a senior engineer with strong platform and backend expertise who can become productive quickly in complex technical environments.
Core Skills
- 5+ years building and shipping production software
- Strong full-stack engineering background in high-scale environments
- Strong frontend capabilities with React, TypeScript and Next.js
- Strong backend engineering expertise in Go
- Ability to adapt quickly to new tools, systems and technical challenges
- Strong systems design skills across resilience, scalability, performance and security
- Strong engineering judgement and pragmatic decision-making
- Excellent communication and collaboration skills
- Experience with automated testing and engineering best practices
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Cloud & Infrastructure
- Strong experience in modern cloud and platform engineering, including several of the following:
- Multi-cloud deployments across GCP, AWS and Azure
- Kubernetes and container orchestration
- Infrastructure-as-code using Terraform
- Private networking and cloud security architecture
- Secrets management and encryption key management
- CI/CD pipelines using GitHub Actions
- Observability using OpenTelemetry (OTEL) and Grafana
- Workflow orchestration using Temporal
Highly Desirable:
- Experience with BYOC SaaS deployments and strong Azure/cloud infrastructure knowledge
- Enterprise Integrations: Experience with APIs, SDKs and enterprise identity tools such as OAuth2, SAML, OIDC and SCIM
- Security & Governance: Strong understanding of access controls, audit logging and compliance frameworks such as SOC 2 / ISO 27001
- AI / ML: Experience building AI-enabled products using Python, ML/NLP workflows, modern databases and frontier models such as Claude, OpenAI or Gemini
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