Senior Platform Architect & AI Lead

Citigroup Inc.; Belfast City District; On-site; GBP 120,000 - 180,000; Full time

Job summary

Citigroup Inc. seeks a hands-on Full Stack Lead Architect to steer enterprise-scale digital platforms across cloud, data, and AI ecosystems. You will guide architecture, mentor teams, and partner with business and technology leaders to deliver scalable, secure, data-driven solutions.

Lead architecture across Java/Spring Boot, Microservices, Angular/React, Snowflake/Databricks, and cloud-native tech; drive modernization while maintaining strong SDLC practices and governance.

Qualifications

• Enterprise architecture expertise with Java and microservices.
• Experience leading large-scale technology initiatives and distributed teams.
• Proven ability to design data lakehouse and AI-enabled solutions.

Responsibilities

• Lead architecture, design, and delivery of enterprise applications using Java, Spring Boot, Microservices, Angular/React, and cloud-native tech.
• Define tech strategy and roadmap for modernization, AI adoption, and platform engineering.
• Design scalable data solutions with Snowflake, Databricks, and data lakehouse architectures.
• Drive AI/GenAI capabilities including LLMs, RAG, AI Agents, and automation.
• Architect event-driven systems with Kafka, Solace, and caching tech.
• Establish SDLC standards, observability, resiliency, and security controls.
• Collaborate with global Architecture, Product, Data Eng, Infra, Security, and Business teams.
• Lead technical reviews, governance, and critical production issue management.

Skills

Full stack architecture

Cloud & platform engineering

AI/GenAI delivery experience

Leadership & mentorship

Stakeholder management & communication

Tools

Java/Spring

Angular/React

REST & EDA

Kafka/Solace/Redis

Snowflake/Databricks

Azure/AWS Cloud

Docker/Kubernetes/OpenShift

Git/Jenkins/Azure DevOps

Job description

Citigroup Inc. seeks a hands-on Full Stack Lead Architect to steer enterprise-scale digital platforms across cloud, data, and AI ecosystems. You will guide architecture, mentor teams, and partner with business and technology leaders to deliver scalable, secure, data-driven solutions.

Lead architecture across Java/Spring Boot, Microservices, Angular/React, Snowflake/Databricks, and cloud-native tech; drive modernization while maintaining strong SDLC practices and governance.