Backend & Financial Systems Consultant
Helping fintech and enterprise teams build scalable backend systems
I help fintechs, banks, and enterprise teams design, improve, and scale backend systems. Java, microservices, and financial domain expertise—delivered with clarity and impact.
Who I Am
Backend engineer turned technology consultant. I help teams build systems that scale.
I've spent 7+ years building backend systems—from business banking platforms serving tens of millions of users to e-commerce, CRM, and enterprise software. Based in Warsaw, Poland, I work with fintechs, banks, and scaleups globally. My focus: clear architecture, scalable design, and technical decisions that serve business goals.
Read my full storyConsulting Services
Focused on backend architecture, microservices, and financial systems. Each engagement is tailored to your context.
Backend Architecture Consulting
Design and refine backend systems for scale, reliability, and maintainability.
Learn moreJava & Spring Boot Consulting
Deep expertise in Java ecosystems and Spring Boot best practices.
Learn moreMicroservices Design & Modernization
Design, split, and modernize microservices architectures.
Learn moreFinancial Systems & Banking Technology Consulting
Domain expertise in banking, wealth management, and financial platforms.
Learn moreSystem Scalability & Performance Improvement
Identify and resolve bottlenecks in high-traffic systems.
Learn moreAPI Design & Integration Strategy
Design APIs and integration patterns for internal and external consumers.
Learn moreIndustries I Serve
Deep experience in banking, fintech, enterprise software, and more.
Banking
I have worked on business banking, retail banking, and wealth management platforms serving tens of millions of users. I understand core banking integrations, regulatory requirements, and the complexity of multi-tenant financial systems.
Learn moreFintech
Fintechs need to move fast while maintaining reliability. I help design systems that balance innovation with compliance, scalability, and operational maturity.
Learn moreFinancial Services
From internal platforms to client-facing systems, I bring experience in financial services domains including CRM, reporting, and enterprise integrations.
Learn moreEnterprise Software
Enterprise systems require robust architecture, clear APIs, and scalable deployment. I help teams build platforms that serve large organizations reliably.
Learn moreTelecommunications
Telecom systems demand high availability and complex integrations. I have experience in CRM and operational systems for telecom providers.
Learn moreE-commerce
E-commerce backends must handle high traffic, complex workflows, and integrations. I help design systems that scale with demand.
Learn moreWhy Work With Me
Technical depth, domain expertise, and a track record of delivering impact.
Technical depth
7+ years building backend systems. Java, Spring Boot, microservices—I've shipped and scaled them in production.
Domain expertise
5+ years in banking and finance. I understand regulatory constraints, core banking integrations, and financial domain complexity.
Business alignment
I connect technical decisions to business outcomes. Architecture that serves growth, not just elegance.
Leadership experience
Chapter Team Lead for ~90 engineers. I know how to guide teams, not just write code.
Selected Experience
Generalized summaries of consulting and engineering work. Some details are confidential.
Large-Scale Business Banking Platform
Consulting and development for a business banking platform serving tens of millions of users across multiple regions.
Read moreEnterprise Financial Systems
Backend engineering for enterprise financial systems including internal platforms and client-facing applications.
Read moreE-Commerce Platform Engineering
Backend support for a large e-commerce platform handling high traffic and complex order workflows.
Read moreWorked Across
Experience from leading technology and financial services companies.
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What Clients Say
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“Yusuf brought clarity to our architecture decisions and helped us prioritize what mattered. His banking domain knowledge was invaluable.”
“We needed an independent perspective on our backend systems. The assessment was thorough, actionable, and delivered on time.”
“Technical depth and business understanding in one. Highly recommend for teams scaling complex systems.”
Frequently Asked Questions
Common questions about my consulting services.
I offer project-based consulting, retainer advisory, architecture reviews, and workshops. The format depends on your needs—from a one-off assessment to ongoing support.
Ready to discuss your backend architecture?
Book a discovery call or reach out with your project details. I respond within 1–2 business days.