Principal Solution Architect in Dubai, UAE
I architect secure fintech platforms that scale reliably.
I bring 14+ years of experience across enterprise architecture, cloud modernization, DevOps automation, banking platforms, mobile wallets, remittance systems, and high-availability financial services.
About
Architecture with delivery discipline.
Hasan Kalim Ibrahim Buttar is a meticulous principal solution architect who connects strategy, engineering, infrastructure, security, and operations. He has led architecture and modernization work for digital wallet, internet banking, remittance, payment, and core banking platforms.
His strongest work happens where business-critical systems need clear architecture standards, stable delivery pipelines, secure integration patterns, and teams aligned around measurable outcomes.
Flagship Projects
Financial platforms designed for scale, resilience, and compliance
Payment Hub and Wallet
Cloud-native digital wallet and payment platform
Defined and governed architecture for a multi-channel, multi-currency wallet platform with modular microservices, transaction processing, reconciliation, and ledger management.
- Kubernetes, Helm, infrastructure-as-code, and blue/green deployments.
- RabbitMQ-based asynchronous communication for resilience and eventual consistency.
- Ocelot API Gateway, OAuth2/JWT, rate limiting, service discovery, RBAC, TLS, and vulnerability scanning.
- ELK, Prometheus, and Grafana observability supporting 99.95% uptime goals.
Mobile Banking Transformation
Microservices backend for real-time banking services
Re-architected monolithic banking APIs into domain-aligned services for user management, transactions, notifications, analytics, and partner integrations.
- Isolated SQL Server databases per service with OpenAPI-based versioning.
- Redis caching and RabbitMQ workflows to reduce API latency below 200ms.
- Fault-tolerant Mastercard/SINNAD integrations using retry and fallback patterns.
- Azure DevOps pipelines, OWASP scanning, JWT/RBAC, and mTLS-secured service communication.
International Remittance System
Mission-critical remittance and logistics architecture
Established architecture standards for a secure remittance ecosystem covering orchestration, partner integration, user access, auditability, and operational tooling.
- On-prem Kubernetes cluster architecture with modular service scalability.
- RabbitMQ-driven event design for domain decoupling and operational traceability.
- JWT-based RBAC, centralized policy controls, and resilient Polly-based integration patterns.
- Automated testing, deployment governance, and full-stack monitoring through Azure DevOps and Grafana.
Experience
Career progression across architecture, engineering, and banking
Principal Solution Architect, Seer Solutions
Reporting to CTO/CEO, leading enterprise redesign, DevOps transformation, Azure migration, microservices architecture, wallet, remittance, internet banking, payment, and financial aid distribution platforms.
Principal Software Engineer, NetSol
Built and optimized NetSol Financial Suite for global leasing and finance clients, covering .NET, WPF/WCF, MVC, Entity Framework, Angular migration, Oracle, SQL Server, UAT, go-live, and client communication.
Software Engineer, Sigmatec
Developed Themis, a web/mobile platform for medical and crime investigation labs using semantic web technologies, X-Forms, XML, XSLT, workflows, and mobile-first UI patterns.
Software Engineer, Allied Bank Limited
Worked with bank teams and Temenos consultants on T24 Core implementation, customization, functional validation, testing cycles, support, and complaint resolution.
Capabilities
Technical leadership across the full platform lifecycle
Enterprise Architecture
TOGAF, ArchiMate, Enterprise Architect, Visio, domain-driven design, architecture governance, roadmap planning, and technical standards.
Cloud and DevOps
Azure, AWS, Docker, Kubernetes, Helm, Jenkins, Azure DevOps, Git, Ansible, automated build, test, deployment, rollback, and release strategy.
Integration and Data
API gateways, MuleSoft, Apache Kafka, Kafka Connect, RabbitMQ, Minio, Apache Spark, Greenplum, Qlik Sense, and partner integration patterns.
Security and Reliability
ISO 27001 awareness, IAM, WAF, SIEM, TLS, JWT, RBAC, mTLS, OWASP scanning, Prometheus, Grafana, ELK, and incident-focused observability.
Software Engineering
.NET Core, Java, Python, Node.js, Angular, React, MVC, WCF, Entity Framework, SOLID principles, design patterns, refactoring, and performance optimization.
Delivery Leadership
Agile delivery, JIRA, Confluence, Trello, mentoring, stakeholder communication, technical documentation, UAT support, go-live readiness, and operational handover.
Credentials
Certifications and professional training
- TOGAF 9.0
- TOGAF Standard Version 9.2
- AZ-400 Microsoft Azure DevOps Solutions
- Microsoft DevOps Engineer Expert
- Microsoft Azure Developer Associate
- Designing and Implementing Microsoft DevOps Solutions
- Scrum Master Certified
- Scrum Fundamentals Certified
- Six Sigma Yellow Belt
- Master's in Project Management
Contact
Let us talk about the platform you want to build next.
For architecture consulting, fintech platform design, DevOps transformation, modernization planning, or delivery leadership, send a short note with your goal and timeline.
kalimbuttar47@outlook.com