Why
Payments are evolving from human-operated systems to intelligent, agent-driven platforms — designed to scale, adapt, and operate autonomously in a global economy.
Join Unlimit's AI engineering team in Serbia and work on the global payment infrastructure powering global, agent-driven commerce.
View open rolesWhy
Payments are evolving from human-operated systems to intelligent, agent-driven platforms — designed to scale, adapt, and operate autonomously in a global economy.
From day one
You'll help turn fragmented financial ecosystems into a single programmable layer, making global expansion a matter of code, not geography.
At Unlimit, we're transitioning from a traditional fintech to an AI-native, agentic financial infrastructure. Meaning, we're at a point where foundational architectural decisions are being made. This is why we're actively hiring the best AI-driven engineers on the market to help us make choices that will shape product behaviour, system intelligence, and long-term autonomy.
If you're fond of designing autonomous systems, agent workflows, and API-first architectures at scale, and want to be part of a team of senior engineers working on how AI-powered financial systems will operate, this is the moment.
Designing and building AI agents that autonomously interact with APIs, financial systems, and external services
Architecting and scaling production-grade, AI-native systems used globally
Making core architectural decisions around agent autonomy, orchestration, observability, and safety
Working closely with Product and Design to translate complex financial and AI concepts into real, usable systems
Improving performance, reliability, and developer experience across high-load, distributed infrastructure
Our production systems are primarily built with these.
Agentic systems, orchestration, AI-assisted workflows, spec-driven development across the company.
Modern systems require both probabilistic and deterministic thinking.
AI agents accelerate delivery, reasoning, and experimentation. Deterministic platforms ensure compliance, scalability, reliability, and operational control.
We strongly discourage manual coding where automation can do better. Instead, we promote spec-driven development, reusable architectures, and AI-assisted engineering workflows across the company.
We value solid engineering fundamentals and pragmatic technology choices.
At Unlimit, we believe great work happens when people are in the same room. This is why we're building our IT hub in Belgrade, where technical teams can come together to solve problems, move faster, make better decisions, and stay aligned on what we're building.
Located centrally in Europe, at Skyline AFI Tower, we have designed a space you'll love working from.
You'll work alongside top-tier professionals who have built and scaled complex systems and now focus on AI-native infrastructure. The team brings together different backgrounds, perspectives, and areas of expertise, all collaborating closely from our AI hub in Belgrade with a shared focus on building the next generation of global financial systems.
Fast-growing tech hub — one of the fastest-growing tech ecosystems in Europe. Billion-dollar startup ecosystem — valued at over $1B. Strong and stable economy — investment-grade country with rising global trust. Booming IT sector — €4B+ in tech exports annually, with consistent year-on-year growth.
We also make sure people have what they need from day one, including market-leading compensation, health insurance, and relocation support if you're moving to Serbia from a different part of the world.
Intro conversation
Deep-dive technical discussion
Hands-on AI agent workflow challenge
Team collaboration session
Final decision
Engineering
Engineering
Engineering
Engineering
Engineering
Engineering
Engineering
Support
Information Technology