Senior IT Solutions Architect – Mobile & Cloud Banking

About the Client

Our client is Poland’s largest financial institution and a market leader in digital banking, delivering cutting-edge services to millions of active daily users.

Please note: Optiveum is acting as the recruitment partner for this role. You will sign a long-term B2B contract directly with a reputable IT outsourcing company, dedicating your expertise full-time to this Bank's technological transformation.

About the Role

We are seeking a Senior IT Solutions Architect to co-define the target architecture for Poland’s premier mobile banking ecosystem. Operating at the intersection of product and platform engineering (50/50 split), you will design microservices-based, distributed, and cloud-native solutions designed to handle high-concurrency traffic with near 100% availability.

What You Will Do

Architect High-Scale Systems: Design complex, distributed software architecture and system integrations for high-volume mobile banking services.
Bridge Platform & Product: Split your focus 50/50 between driving core Tech Platform architecture in the Foundation team and supporting dedicated domain product teams.
Define Engineering Standards: Establish requirements for hardware, infrastructure, tech stack, service orchestration, and software development best practices.
Integrate & Document: Model system integrations (C4/UML) and maintain complete, high-quality architectural documentation.
Ensure Security & Performance: Partner with cybersecurity experts on access layers, OAuth 2.0/OIDC implementations, and cryptographic standards.
Drive Data-Backed Decisions: Independently gather technical domain context across the organization to recommend and implement architectural optimizations.

What We Expect

Experience: 5+ years in IT solution architecture and complex system integrations.
Domain Knowledge: Proven track record in designing architecture for mobile applications and high-availability, high-concurrency systems in the financial sector.
Modern Stack & Practices: Practical experience with microservices architecture, Kubernetes (k8s) orchestration, containerization, and cloud CI/CD delivery pipelines.
Platform Engineering: Solid grasp of domain-driven platform teams supporting product engineering teams.
Security & Auth: Strong understanding of authentication/authorization protocols (OAuth 2.0, OIDC) and cryptography (digital signatures, PKI, encryption).
Code & Modeling: Hands-on ability to model in C4/UML, read/analyze code in Java, Kotlin, or Swift, and work with Git.
Education & Languages: Higher degree in Computer Science (or related) and fluency in reading technical documentation in English.

What is Offered

Salary: 180 – 190 PLN/h net + VAT (B2B contract, depending on experience).
Work Model: Hybrid (minimum 2 days/month in the Warsaw office).
Contract Duration: 6–12 months (with a high probability of long-term extension).
Location: Warsaw, Poland.
Impact & Scale: Direct influence on an application powering the daily financial transactions of millions of users using a modern tech stack.

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