Product Engineer (Go, Billing)

The company considers specialists residing in Cyprus or EU countries.

Data-Driven Lab

is an international IT company developing products for fintech, edtech, and analytics industries. Alongside product development, we help businesses grow with a full range of digital marketing services.

We are looking for a Product Engineer (Go) to join the team accountable for the internal billing, ledger, and financial operations. The mission is to deliver the best possible customer experience during cash operations: deposits, withdrawals, transfers, etc.

We expect you to

• Build the internal ledger in Go: accounting views, double-entry postings, balances, FX handling, client funds segregation, separate ledgers.
• Implement support of trading logic in billing: fees, margins, collaterals, commissions, swaps, adjustments and reversals, FX reevaluation.
• Ensure financial correctness: automate reconciliation across payment/trading/PSP sources, define matching logic and tolerances, automate mismatch detection, implement correction mechanisms and preserve an immutable audit trail.
• Build data products: APIs and exports for management reporting, for customer self-verification and statements, for customer support transparency, for regulatory reporting.
• Fluent English: daily communication in international teams, technical discussions, documentation.

What is important to us

• You consistently put customer value and team goals above everything else when making any decision during your work.
• Engineering mindset: ability to build new under uncertainty, understand big complex systems, navigating root causes, and choose mindful solutions.
• You built an accounting-grade ledger/billing core in Go.
• You worked in a regulated and audit-heavy environment: ISO 27001, PCI DSS, DORA.
• You designed automated reconciliations.
• You built financial data products: accounting views/APIs/exports for internal and external usage.
• Production reliability experience: observability, resilience practices, incident management, safe releases.
• Commitment to engineering quality through writing tests and automating quality checks (integration / contract / E2E).

We offer

• Direct feedback loop with customers: you will see how you impact their experience and their success.
• True peer-to-peer relationships within teams with no managers, team leads or any other roles defined for them — everything is managed by you and your teammates through collaboration based on agreements, not titles.
• Non-fading startup pace: autonomous decision-making inside the team, and the ability to choose the way the product evolves.
• Engineering-driven environment: we value engineering experience and creative thinking combined, so you’ll be able to handle the process end-to-end.
• No gatekeepers: as our teams are completely autonomous, the development, security, and sustainability are owned by you.
• Comfortable conditions: competitive salary, medical compensation, fully remote working options.