Unlimit

Solution Architect (Java, AI-native backend, FinTech)

Belgrade Full-Time On-site
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Job Description

About Unlimit Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform. Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed. Driving the evolution of payments, Unlimit is transforming its infrastructure from human-operated fintech into AI-native financial infrastructure — where APIs are consumed by machines, integrations are negotiated by agents, and systems evolve continuously through intelligent automation. Our next users are not only humans. They are AI agents acting on behalf of humans and businesses. Unlimit serves more than the needs of businesses today; we are building the nervous system for a borderless global economy. About the Role Unlimit is undergoing a deep technology transformation. As a global fintech with a robust suite of products — including card acquiring, banking-as-a-service, payment gateways, crypto solutions, and wallets — we’re rebuilding our core backend platforms to be AI-native, modular, and cloud-agnostic.

We’re seeking a forward-thinking and hands-on Solution Architect to lead this transformation from within. This is a strategic yet execution-driven role: you’ll help define and implement next-generation architecture that’s scalable, resilient, and designed with real-time AI capabilities.

You’ll work at the intersection of architecture, infrastructure, and delivery, collaborating closely with Product, DevOps, Engineering, and Data teams. Your work will directly shape systems that serve thousands of merchants globally — with near-zero downtime, built-in observability, and seamless integration of AI agents into critical paths. This is a rare opportunity to join Unlimit at a pivotal point and define the future of financial infrastructure.

Frequently Asked Questions

What does the Solution Architect (Java, AI-native backend, FinTech) role at Unlimit involve?

The Solution Architect (Java, AI-native backend, FinTech) position at Unlimit in Belgrade is a full-time role. About Unlimit Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform. Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed.

What skills are required for Solution Architect (Java, AI-native backend, FinTech) at Unlimit?

Key skills for this role include: Java, Scala, API.

What is the salary for Solution Architect (Java, AI-native backend, FinTech) at Unlimit?

The salary for this position is not publicly listed. You can negotiate during the interview process. Check Glassdoor or Levels.fyi for estimates.

Is the Solution Architect (Java, AI-native backend, FinTech) position at Unlimit remote or on-site?

This position is On-site. The role is based in Belgrade.

How do I apply for Solution Architect (Java, AI-native backend, FinTech) at Unlimit?

You can apply for this position directly through the employer's careers page. Click the 'Apply Now' button on this page to be redirected to the original listing. Make sure your resume is ATS-optimized. Use SpotChange's free ATS test to check.

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About This Role

Solution Architect (Java, AI-native backend, FinTech) at Unlimit is a full-time backend position in Belgrade. Key skills include Java, Scala, API. Education: Master's Degree preferred. Experience: 3+ years.

This role is classified as on-site and is suitable for mid level-level professionals. Ghost Score 20/100 (Probably Active) indicates this listing is probably active with recent employer engagement.

To apply, visit the official application page through the Apply Now button above. SpotChange Jobs provides AI-powered career tools including resume optimization, ATS testing, interview preparation, and salary negotiation assistance.