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Location
In office (Belgrade)
Seniority
Senior
Employment
Full-Time
Overview
Company
Impact
Profile match
Unlimit is a global financial technology company headquartered in London, United Kingdom, and founded in 2009. The firm provides a suite of financial services, including global payment processing, multicurrency business accounts, card issuing, and banking-as-a-service platforms. Operating across Europe, Asia, Africa, and the Americas, the company supports over 1,000 local payment methods and 150 currencies to facilitate international business transactions.

About the Role

At the core, you enjoy helping customers and internal stakeholders using your deep technical knowledge. As a Solutions Engineer at Unlimit, you own the customer's technical journey from signed contract to live production traffic, designing integration solutions, unblocking complex problems, and making sure financial projects actually launch. You will act as the key bridge between our clients and our internal teams (Product, Engineering, Sales, Support, and Account Management).

Because we are growing, this is a unique opportunity to join as the first member of our Solutions Team in the region, where you will have the agency to help define and shape our local standard operating procedures (SOPs).

What You Will Do

The role is delivery-weighted: the majority of your time is spent getting customers integrated and live.

  • Integration Support & Delivery (80-85%): Own signed customers from sandbox to public launch. Lead requirements gathering, provide technical recommendations, design the integration approach, support and troubleshoot the customer's development cycle, run testing and certification, and oversee initial transaction monitoring after go-live. You are the customer's primary technical counterpart throughout.
  • Pre-Sales Support (10-15%): Partner with Sales on selected opportunities, technical product demos, security and RFP questionnaires, and architecting integration solutions that fit the prospect's use case.
  • Technical Account Management (5%): Provide strategic technical support for a small set of top-tier, high-volume accounts - ensuring ongoing success and surfacing opportunities for growth.
  • Process Improvement: Drive optimization of the integration lifecycle: from sales handover to go-live and build the playbooks, documentation, and SOPs the regional team will run on.

Required Skills and Qualifications

  • Technical Expertise: Deep understanding of API concepts, security mechanisms, and integration patterns.
  • Architecture Knowledge: Strong grasp of SaaS architecture, cloud computing conventions, and modern web applications. AWS knowledge is a plus.
  • Engineering Fundamentals: Demonstrable coding skills in Java, ability to write SQL queries, familiarity with software frameworks and client-server architecture. Python scripting is a plus.
  • Delivery Skills: Ability to run multiple concurrent integration projects - tracking dependencies, managing timelines, and driving customer-side blockers to resolution.
  • Tools: Postman, Claude Code / Codex / other AI harness, any DB client, and any OpenAPI demo tool.
  • Communication: Proven ability to present and explain complex technical concepts to non-technical stakeholders with a high level of organization.

Key Success Metrics

  • Time-to-Value (primary): Reducing the time between contract execution and the go-live milestone.
  • Launch Success Rate: Signed customers that reach production and sustained transaction volume, without stalling in integration.
  • Customer Satisfaction: Quality of product and project execution feedback from the customers you deliver.
  • Revenue Impact: Enabling existing customers to utilize the full scope of their purchased services, and supporting key deals where technical validation is decisive.
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