Senior Software Engineer
Posted Today by Techmunity | AI Startup Recruitment
£500 Per day
Outside
Onsite
London Area, United Kingdom
Summary: The Senior Software Engineer role focuses on developing a platform for a seed-stage AI-native company preparing for a public launch. The position involves designing the architecture, managing infrastructure, and ensuring security compliance for a scalable system. This contract role is based in central London and requires a strong backend emphasis with experience in regulated environments. The engagement is for an initial three months, with a possibility of extension based on performance and project needs.
Key Responsibilities:
- Design and own the architecture of the platform, including the state machine, workflow engine, API layer, and data model.
- Own infrastructure, deployments, and CI/CD to ensure platform reliability, scalability, and speed.
- Build and maintain security practices appropriate for a regulated firm, including data encryption, access controls, audit logging, and penetration testing.
Key Skills:
- 5+ years of experience building production software with a strong backend emphasis.
- Strong command of Python, TypeScript, and React/Next.js.
- Experience in building and operating scalable, secure systems with knowledge of infrastructure, observability, and deployment pipelines.
- Strong architectural judgement for foundational decisions about the stack, data model, and system design.
- Comfortable with security and compliance requirements in regulated or security-sensitive environments.
Salary (Rate): £500 daily
City: London
Country: United Kingdom
Working Arrangements: on-site
IR35 Status: outside IR35
Seniority Level: Senior
Industry: IT
Senior Software Engineer (Platform focused) | Contract | £500 per day Initial 3 month engagement | Outside IR35 | 3 days per week onsite central London Seed-stage AI-native company taking on a major UK regulated services market. Backed by top-tier European VCs, founders include the team behind one of the UK's best-known modern consumer brands. Public launch later this year. Working MVP exists. The job is to take it from prototype to the platform that supports launch and scale.
You will:
- Design and own the architecture of the platform - the state machine, workflow engine, API layer and data model that orchestrate every transaction
- Own infrastructure, deployments and CI/CD - ensure the platform is reliable, scalable and fast as they grow from launch to thousands of concurrent transactions
- Build and maintain security practices appropriate for a regulated firm - data encryption, access controls, audit logging, penetration testing
You'll need:
- 5+ years building production software, with a strong backend emphasis
- Strong command of Python, TypeScript and React/Next.js
- Experience building and operating scalable, secure systems - you understand infrastructure, observability and deployment pipelines
- Strong architectural judgement - you'll be making foundational decisions about the stack, data model and system design
- Comfortable with security and compliance requirements - you've worked in regulated or security-sensitive environments
Contract rate is circa £500 per day. Outside IR35. Interviews are happening now - start date is ASAP.
To apply or discuss: reuben@techmunity.io