Technical Architect

Free-Work UK; Glasgow; Hybrid; GBP 70,000 - 105,000; Full time

Job summary

CGI is seeking a Technical Architect to own reviewing, reconstructing and maintaining technical designs across a complex application estate. Working within the Application Upgrade Programme, you will assess High Level Designs, identify gaps, and collaborate with solution architects and SMEs to establish accurate baselines for informed upgrade decisions.

You’ll transform incomplete or outdated technical information into reliable documentation, ensuring security considerations are integrated and

Qualifications

• Proven technical architecture experience in complex application environments.
• Experience producing and maintaining technical architecture documentation, including High Level Designs.
• Ability to reconstruct technical designs from existing systems and incomplete documentation.
• Strong understanding of hosting, infrastructure, interfaces, integrations and dependencies.
• Aware of security considerations in technical and application architecture.
• Excellent analytical and problem-solving skills with incomplete information.

Responsibilities

• Review and update High Level Designs and supporting docs across the application estate.
• Reconstruct technical designs where documentation is incomplete or unavailable.
• Collaborate with technical specialists to understand environments and establish factual designs.
• Document hosting, infrastructure, interfaces, integrations, dependencies, security and operations.
• Ensure technical documentation is accurate, consistent and detailed for governance and delivery.
• Identify architectural changes and risks and route them to governance.
• Build effective relationships with architects, leads, SMEs and delivery teams.
• Maintain reliable baselines to support informed decisions and upgrade milestones.

Skills

Technical architecture

High level designs

Reverse engineering

Documentation

Stakeholder collaboration

Problem solving

Attention to detail

Security awareness

Job description

At CGI, we help clients modernise complex technology estates with the insight and confidence needed to deliver change successfully. As a Technical Architect, working on one of our flagship accounts, on an application upgrade programme, you’ll create the reliable technical foundations that enable informed architecture decisions and successful application upgrades. You’ll take ownership of understanding existing application environments, rebuilding incomplete designs and establishing accurate technical baselines across the estate. Working closely with Solution Architects, Technical Leads and subject matter experts, you’ll have the opportunity to solve complex technical challenges and improve how architectural knowledge is captured and used. You’ll be supported by an experienced, collaborative team while having the autonomy to strengthen technical quality, reduce delivery risk and make a tangible contribution to a major transformation programme.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.

This is a hybrid position but there is an expectation of working at CGI and our Client’s offices in Glasgow for 3 days a week.

Candidate Profile

In this role, you will take ownership of reviewing, reconstructing and maintaining technical designs across a complex application estate. Working under the direction of the Application Upgrade Programme (AUP) Solution Architecture function, you’ll assess existing High Level Designs (HLDs), investigate gaps and inconsistencies, and work with technical specialists to establish an accurate picture of implemented application environments.

You’ll bring structure and creative problem solving to situations where technical information is incomplete or outdated, capturing hosting, infrastructure, integrations, dependencies, security and operational characteristics. Supported by Solution Architects, Technical Leads and SMEs, you’ll create reliable technical baselines that strengthen governance, identify risks earlier and give programme teams the information they need to deliver application upgrades confidently.

• Review & Maintain: Assess and update HLDs and supporting technical documentation across the application estate.
• Reconstruct & Document: Rebuild technical designs where existing documentation is incomplete, inconsistent or unavailable.
• Discover & Analyse: Work with technical specialists to understand implemented application environments and establish the facts behind existing designs.
• Capture & Baseline: Document hosting, infrastructure, interfaces, integrations, dependencies, security and operational characteristics.
• Assure & Improve: Ensure technical documentation is accurate, consistent and sufficiently detailed to support architecture and delivery.
• Identify & Escalate: Recognise material architectural changes, discrepancies and technical risks and route them through the appropriate architecture governance.
• Collaborate & Influence: Build effective working relationships with Solution Architects, Technical Leads, SMEs and programme delivery teams.
• Enable & Deliver: Maintain reliable technical baselines that support informed decisions, programme governance and successful application upgrade milestones.

Required Qualifications To Be Successful In This Role

You’ll bring Technical Architecture experience within complex application environments, with the ability to understand existing systems and translate technical discovery into clear, accurate architecture documentation. You’ll combine strong analytical skills and attention to detail with a collaborative approach, taking ownership of technical information while drawing on specialists across the programme to establish reliable designs.

• Proven Technical Architecture experience within complex application or enterprise technology environments.
• Strong experience producing and maintaining technical architecture documentation, including High Level Designs.
• Ability to reverse-engineer or reconstruct technical designs from existing systems, stakeholder knowledge and incomplete documentation.
• Good understanding of application hosting and infrastructure, including the relationships between applications and their underlying technology.
• Strong understanding of interfaces, integrations and technical dependencies across application environments.
• Good awareness of security considerations within technical and application architecture.
• Understanding of operational and support requirements and how these influence technical design.
• Strong analytical and problem-solving capability, particularly when working with incomplete or inconsistent technical information.
• Excellent attention to detail, with the ability to establish and maintain accurate technical baselines.
• Strong stakeholder and collaboration skills, with the ability to work effectively with architects, Technical Leads, SMEs and delivery teams.