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AI Tech Lead (Python | Azure | LLM / Agentic Systems)
Contract- Hybrid, UK (One day per month in the London office)

We're looking for a strong AI Tech Lead with Python engineering with proven experience building production-grade systems on Azure, alongside hands-on exposure to modern AI and agentic architectures.

This role is focused on designing and delivering scalable AI-enabled services, working across LLM orchestration, tool integration and real-world deployment in cloud environments.

Key Responsibilities

Design and build robust backend services using PythonDevelop and deploy applications on Azure (AKS, Functions, App Service or similar)Build and optimise AI / agentic systems, including:LLM orchestration workflowsRetrieval Augmented Generation (RAG) pipelinesTool usage / agent frameworksEvaluation and performance tuning of modelsWork closely with product and engineering teams to translate requirements into scalable solutionsEnsure high standards of code quality, testing and performance in production systems

Required Experience

Strong hands-on Python development experience (production systems)Proven experience deploying and managing applications on AzureExperience with containerisation and/or orchestration (e.g. Kubernetes / AKS)Practical experience building AI-driven solutions in productionStrong understanding of:LLM ecosystems (e.g. OpenAI, OSS models)RAG architecturesAgent frameworks / tool integrationExperience designing scalable, reliable cloud-native systems

Desirable

Experience with MLOps / model lifecycle managementFamiliarity with frameworks such as LangChain, LangGraph or similarExposure to CI/CD pipelines and infrastructure as code

Overview

High-impact role working on cutting-edge AI systemsStrong engineering focus - not just experimentation, but production deliveryOpportunity to shape architecture and design decisions

GCS is acting as an Employment Business in relation to this vacancy.

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We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less

We are seeking skilled .NET Engineers to join our team and play a critical role in modernizing legacy systems. The primary focus of this role is migrating existing VB6 and VB.NET applications to a modern .NET C# WPF environment within an accelerated delivery timeline.

Key Responsibilities

Lead the migration of legacy VB6 and VB.NET applications to .NET C# WPFUse AI-powered development tools to enhance speed, efficiency, and code qualityContribute to an aggressive delivery roadmap targeting.Design and implement robust test harnesses to ensure correctness and stabilityEstablish safety protocols to safeguard data integrity during migrationPerform automated refactoring and support framework migration initiativesTroubleshoot complex legacy systems and resolve architectural challenges

Required Skills & Experience

Strong hands-on experience with C# and the .NET ecosystemProven experience working with legacy systems (e.g., VB6, VB.NET)Familiarity with WPF application developmentExperience using AI-assisted development tools such as Codex, or Claude Code, or Cursor or other similar toolsSolid understanding of code refactoring, modernization, and migration strategiesAbility to work under tight timelines and deliver high-quality results

GCS is acting as an Employment Business in relation to this vacancy.

Read less