Senior Solutions Architect

Holt Executive Ltd; Greater London; On-site; GBP 100,000 - 140,000; Full time

Job summary

Holt Executive Ltd. seeks an experienced Senior Solutions Architect to shape data-driven platforms supporting commercial operations and growth. This hands-on leadership role combines software architecture, full-stack development, cloud infrastructure and emerging AI technologies.

You will define architecture for web apps, automated document systems and cloud platforms, making key technical decisions from design to production deployment while mentoring engineers and promoting best practices.

Qualifications

• Proven Python development experience in production apps.
• Strong AWS experience (Lambda, ECS/Fargate, S3, API Gateway).
• Experience deploying containerised apps with Docker.
• Strong SQL skills and data warehouse experience.
• Hands-on with IaC (Terraform).
• Proficiency with Git, CI/CD and modern delivery practices.
• Experience designing multi-component software systems from architecture to production.
• Ability to balance technical trade-offs in fast-paced environments.
• Strong communication of technical decisions to diverse stakeholders.

Responsibilities

• Lead architecture and development of scalable, full‑stack apps.
• Design backend services, APIs, front-end interfaces and system integrations.
• Develop production apps using Python, TypeScript and modern web tech.
• Architect cloud solutions using AWS (Lambda, ECS/Fargate, S3, API Gateway).
• Design and manage infra with Terraform, Docker, and CI/CD pipelines.
• Evaluate new tech via PoCs and make architectural recommendations.
• Explore AI capabilities, including LLM integrations and tool-enabled workflows.
• Improve performance, reliability, security and maintainability for high-volume data.
• Collaborate with product, analytics, data engineering and commercial teams.

Skills

Python development

AWS architecture

Docker

SQL

Terraform

Git & CI/CD

Software architecture

Communication of decisions

AI/LLM concepts

Tools

Next.js

React

TypeScript

GCP (BigQuery/Cloud Run)

Job description

A global technology organisation is seeking an experienced Senior Solutions Architect to help shape and develop a suite of data-driven software platforms that support commercial operations, customer engagement and business growth.

This is a hands-on technical leadership role combining software architecture, full-stack development, cloud infrastructure and emerging AI technologies. You’ll help define the architecture of web applications, automated document generation systems and cloud-based platforms, making key technical decisions from initial design through to production deployment.

Working within a small, collaborative team, you’ll share technical ownership of the platform, mentor engineers and help evolve successful early-stage solutions into scalable, enterprise-grade applications.

The role offers the opportunity to influence technology strategy while remaining closely involved in coding, prototyping and delivering practical solutions to real business challenges.

Key Responsibilities

• Lead the architecture and development of scalable, multi-component software applications across the full stack.
• Design and implement backend services, APIs, frontend interfaces and integrations between enterprise systems.
• Develop production applications using Python, TypeScript and modern web technologies.
• Architect cloud-based solutions using AWS services, including Lambda, ECS/Fargate, S3 and API Gateway.
• Design and manage infrastructure using Terraform, Docker and modern CI/CD pipelines.
• Evaluate new technologies through proof-of-concepts and make informed architectural recommendations.
• Explore and implement AI-powered capabilities, including LLM integrations, agent frameworks and tool-augmented workflows.
• Optimise application performance, reliability, security and maintainability across high-volume data environments.
• Work closely with product, analytics, data engineering and commercial stakeholders to translate business needs into technical solutions.
• Define integration patterns, authentication and authorisation approaches, API contracts and scalable system architectures.
• Support the evolution of early-stage applications into robust platforms suitable for enterprise deployment.
• Provide technical guidance, mentor engineers and promote software engineering best practices.

Essential Requirements

• Extensive Python development experience, building and maintaining production applications.
• Strong AWS experience, particularly with Lambda, ECS/Fargate, S3 and API Gateway.
• Proven experience deploying and managing containerised applications using Docker.
• Strong SQL skills and experience working with data warehouses.
• Hands-on experience with Infrastructure as Code, particularly Terraform.
• Proficiency with Git, CI/CD pipelines and modern software delivery practices.
• Demonstrable experience designing and delivering multi-component software systems, from architecture through to production.
• Experience making architectural decisions and balancing technical trade-offs in a fast-paced environment.
• Strong problem-solving skills and the ability to communicate technical decisions to both technical and non-technical stakeholders.

Desirable Experience

• Modern web development using Next.js, React and TypeScript.
• Google Cloud Platform services, particularly BigQuery and Cloud Run.
• Enterprise authentication and authorisation, including SSO, SAML, OAuth and role-based access control.
• Designing and optimising applications that process large datasets at scale.
• Experience with B2B SaaS platforms, CRM systems or sales enablement tools.
• Scaling minimum viable products into enterprise-grade applications.
• Agile development methodologies and tools such as Jira.
• Full-stack development spanning cloud infrastructure, backend services and frontend interfaces.
• Mentoring engineers and establishing technical standards and best practices.
• Automated document generation, data visualisation or similar application capabilities.
• Integrating LLM APIs into production applications and developing AI-powered features.
• Familiarity with the Model Context Protocol (MCP), AI agent frameworks or tool-enabled LLM workflows.
• Experience developing customer onboarding, self-service or customer success platforms.

The Opportunity

This position is suited to a technically strong architect who enjoys staying hands-on with development while influencing the wider direction of a software platform.

You’ll have the opportunity to shape architectural decisions, introduce new technologies and develop scalable solutions that deliver measurable business value, working within a collaborative environment with the backing and resources of an established global organisation.