Senior Software Engineer

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.

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

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