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Senior Software Engineer AI Native

Aventum Group

City of Westminster, Greater London, GB · senior
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City of Westminster, Greater London, GB
Location
Senior
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Aventum Group
Employer
Senior Software Engineer jobs
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We are seeking several hands-on Senior Software Engineers with strong full-stack expertise across TypeScript/React, C#/.NET and modern cloud-native technologies. You will design, build and deliver software solutions end-to-end, owning the development lifecycle from discovery and technical specification through implementation, testing, deployment and continuous improvement. As an AI-native engineer, you will use approved AI-assisted development tools and agentic AI workflows to accelerate delivery while maintaining high standards of quality, security and engineering excellence.

You will work confidently with ambiguity, ask focused clarifying questions, compare alternative approaches and translate complex business needs into structured, testable solutions. This is a senior individual contributor role focused on software engineering, implementation and technical delivery rather than people or project management. Success will be measured through engineering impact, delivery outcomes and software quality.

Key Responsibilities Design, build, test, deploy and support production-grade software solutions across the full technology stack. Develop scalable applications using TypeScript, React/Angular or another modern UI framework, C#/.NET and related technologies. Lead technical discovery by asking effective clarifying questions before moving into detailed solution design or implementation. Translate ambiguous or complex business requirements into clear, structured and testable technical specifications using Spec-Driven Development principles.

Evaluate alternative technical approaches and clearly explain the benefits, risks, constraints and trade-offs. Break complex problems into manageable engineering tasks and deliver practical, proportionate solutions without unnecessary complexity. Write secure, maintainable and high-quality code that follows modern engineering standards and best practices. Design and build RESTful APIs, integrations, microservices and event-driven solutions focused on performance, reliability and scalability.

Deliver solutions spanning frontend, Back End and data layers using clean architectural principles. Use AI-assisted development tools and agentic AI workflows across requirements analysis, specification, coding, testing, debugging, documentation and delivery. Take ownership of reviewing, validating and assuring the quality, security and accuracy of both human-written and AI-generated outputs. Develop distributed systems and integrations that support complex workflows and data-processing requirements.

Implement comprehensive automated testing, including unit, integration and regression testing. Troubleshoot technical issues using structured debugging and root-cause analysis techniques. Improve CI/CD pipelines, deployment automation, observability and Infrastructure as Code practices. Build cloud-native applications using compute, serverless, messaging, storage and identity services. Contribute to architectural discussions while remaining actively involved in hands-on coding and implementation.

Collaborate with product owners, analysts, designers, testers and engineers to deliver effective business solutions. Produce clear technical documentation covering specifications, design decisions, operational support and known trade-offs. Demonstrate solutions through working software, prototypes, technical documentation and measurable delivery outcomes. Constructively challenge requirements and technical assumptions while remaining open to feedback and alternative approaches.

Identify opportunities to improve engineering effectiveness through AI, automation, reusable components and repeatable patterns. Participate in code reviews, share knowledge and contribute to engineering best practice and continuous improvement. Undertake any other duties reasonably required. Software Engineering and Delivery Significant recent hands-on experience in software development and object-oriented programming.

Proven experience owning co

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