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# PEGA LEAD SYSTEM ARCHITECT - (PEGA LSA)

- **Company:** Square One Resources Limited
- **Location:** Epsom, United Kingdom
- **Experience:** Expert
- **Salary:** £143,000 - £156,000
- **Contract:** Temporary contract
- **Skills:** Agile Methodology, Amazon Web Services, Applications Architecture, Microsoft Azure, Cloud Computing, DevOps, OAuth, Performance Tuning, Security Assertion Markup Language (SAML), Simple Object Access Protocol (SOAP), Single Sign-On, Systems Architecture, Systems Integration, Pega, SC Clearance, Apache Kafka, Restful APIs
- **Published:** November 13, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/pega-lead-system-architect-pega-lsa/55864811

## About the Role

Essential Requirements:Certified Pega Lead System Architect (CLSA) - Part 1 and Part 2.
Extensive experience delivering large-scale Pega implementations.
Strong knowledge of Pega Infinity, architecture, integrations and case management.
Experience with performance tuning and troubleshooting using PAL, PDC and DB Tracer.
Proven experience leading distributed development teams.
Agile/Pega Express delivery experience.
Current and active SC Security Clearance.

Desirable:UK government or public-sector experience.
Pega Constellation architecture.
Pega Cloud, AWS or Azure deployments.
Pega GenAI, Process Fabric or Customer Decision Hub.
Knowledge of NCSC security principles.

## Description

I'm currently looking to speak with an experienced Pega Lead System Architect (LSA) for an exciting 6-month contract supporting a leading UK government organisation through a Pega Partner.
This is a senior technical leadership position, taking ownership of the architecture and technical direction of an enterprise Pega application.
Key Responsibilities:Own the technical architecture and design authority for the Pega solution.
Define application architecture, class structures, data models and reuse strategies.
Design complex integrations using REST, SOAP, Kafka and other connectors.
Lead security design, including SSO, SAML, OAuth 2.0 and access controls.
Own performance, scalability, resilience and non-functional requirements.
Lead, mentor and review the work of Senior and System Architects.
Drive Pega development standards, guardrail compliance and DevOps practices.
Work closely with Lead Business Architects and technical stakeholders.