Global FinTech Software Architect — AI-Driven, Cross-Domain

Papaya Global; Kraków; On-site; PLN 200,000 - 320,000; Full time

Job summary

Papaya Global is seeking a Software Architect to join its central Architects Team, a small group of senior architects who partner with every R&D department to shape scalable, secure systems across payments, payroll, and platform domains.

This hands-on role requires diving into unfamiliar domains quickly, influencing without direct authority, and driving secure-by-design practices and AI-powered engineering adoption across the organization.

Qualifications

• 8+ years proven experience as a System/Software Architect designing robust, scalable systems.
• 12+ years hands-on software development experience, with strong proficiency in Java (preferred) or an equivalent backend language.
• Proven experience building enterprise SaaS platforms, self-service products, and highly scaled production systems.
• Experience in FinTech or other regulated industries is a strong advantage.
• Bachelor's degree in Computer Science or a related technical field.

Responsibilities

• Lead architectural design across multiple Papaya domains and infrastructure systems, ensuring solutions meet business, scalability, performance, and compliance needs.
• Act as a trusted architectural partner to R&D, Product, Security, and DevOps teams — translating business and product requirements into clear technical direction.
• Define and maintain high-level architecture across domains, with a focus on seamless integration, maintainability, and long-term evolvability.
• Build hands-on Proofs of Concept (POCs) to de-risk architectural decisions, validate new technologies, and demonstrate viable paths forward before broad investment.
• Lead technical Due Diligence on third-party vendors, platforms, and integrations — evaluating architecture fit, scalability, security posture, compliance, operational maturity, and long-term cost.
• Drive secure-by-design practices, embedding security, privacy, and regulatory considerations into every stage of system design.
• Evaluate and introduce emerging technologies, frameworks, and patterns — including AI/LLM-based capabilities — where they create real leverage for the business.
• Champion the adoption of AI-powered engineering tools and agentic workflows across R&D, helping teams use them effectively, safely, and consistently.
• Define and steward Papaya's architectural guidelines, standards, and best practices, and help ensure they are actually applied in day-to-day delivery.
• Provide technical mentorship and architectural guidance to development teams across the company.
• Review designs, RFCs, and critical implementations to maintain architectural consistency and system quality across projects.

Skills

Java

Cloud architecture

Microservices

Security fundamentals

English communication

Education

Bachelor's degree in Computer Science

Tools

AWS

Docker

Kubernetes

GraphQL

Job description

Papaya Global is seeking a Software Architect to join its central Architects Team, a small group of senior architects who partner with every R&D department to shape scalable, secure systems across payments, payroll, and platform domains.

This hands-on role requires diving into unfamiliar domains quickly, influencing without direct authority, and driving secure-by-design practices and AI-powered engineering adoption across the organization.