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#vacancy Hi guys! 🚀 Payment Solution Engineer | Unlimit Unlimit is looking for a Payment Solution Engineer with deep expertise in payment infrastructure, banking integrations, and launching new payment rails. About Unlimit Unlimit is an international fintech company with 16 years on the market, building a global ecosystem of financial products, including payment processing, alternative payment methods, multicurrency business accounts, card issuing, Banking-as-a-Service (BaaS), and crypto on/off-ramp solutions. In this role, you'll independently lead integrations with central banks, national clearing systems, and BaaS providers—from initial engagement and certification through to production launch. ✅ Key responsibilities: • Integrate new local payment and clearing systems; • Collaborate with regulators, banks, and external providers; • Configure test environments, complete certification processes, and launch integrations into production; • Design and implement integration solutions; • Own delivery timelines and manage the entire integration lifecycle end-to-end; • Document solutions and hand them over to engineering and operations teams. ✅Tech stack: Java / Kotlin, Spring Boot, jOOQ, Temporal, REST, SOAP/XML, ISO 20022, Kafka, AWS, Docker, Kubernetes, Terraform, GitLab CI/CD. ✅ We're looking for someone with: • 5+ years of experience in payments, banking, or integration engineering, and 8+ years of JVM development experience; • Hands-on experience with SWIFT, SEPA, and other payment schemes; • Strong understanding of clearing and settlement flows; • Experience with ISO 20022, MT/MX, SOAP, and REST APIs; • Experience integrating with central banks or national clearing systems; • Strong English communication skills for working with international partners and regulators; • A genuine interest in AI tools and their practical application in engineering—we actively build AI agents to automate everyday engineering tasks. What we offer: 📍 Belgrade, Serbia (office-based, 5 days/week) 💰Compensation: Flexible, based on your experience and expectations. 📄 Official employment in Serbia with full visa and residence permit support ✈️ Comprehensive relocation package 🏋️ Sports allowance 🇬🇧 English lessons 📚 Learning & development budget [handle] | Anastasia

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