Full-time Sep 2025 - Jun 2026 • Bogota, D.C., Colombia (Hybrid / Remote)
Senior Software Engineer - Core Platform & Security
@Leal
• Loyalty & Retail Fintech Ecosystem
Visit leal.co Core Technologies & Infrastructure click to search
Role Overview & Company Profile
Leal • Loyalty & Retail Fintech Ecosystem
High-scale B2B/B2C loyalty and retail fintech platform in Latin America, processing millions of daily transactions, rewards redemptions, and user engagements across thousands of merchant locations.
Spearheaded core backend platform reliability, identity governance, and high-concurrency microservice architectures supporting retail point-of-sale checkout operations and analytics across millions of active Latin American consumers.
Key Architectural & Engineering Achievements
- • Engineered an enterprise real-time anti-fraud engine from scratch in Golang utilizing the Strategy Pattern to detect cashier collusion and rolling-window velocity anomalies, delivering sub-50ms synchronous endpoints into POS checkout with cross-timezone normalization.
- • Architected and deployed mission-critical microservices in Golang adopting Clean/Hexagonal Architecture and Go concurrency primitives (Goroutines, channels, worker pools) on DynamoDB and Redis, enabling non-blocking execution across high-volume transactional flows.
- • Centralized the core authentication platform into a unified OTP/TOTP microservice, enforcing strict rate limiting, transactional failover to relational storage, multi-channel billing calculation (SMS, WhatsApp, Email), and secure legal document attachments.
- • Decoupled analytical workloads from operational OLTP databases by integrating native gosnowflake drivers into Go microservices, aggregating millions of marketing interactions (sends, opens, clicks, ROI) into real-time merchant dashboards.
- • Spearheaded DevSecOps compliance and CVE remediation across 10+ core repositories under Vanta / SOC 2 standards, hardening Alpine production containers with dumb-init, migrating to modular AWS SDK v3, and engineering Rust contactability pipelines with zero-downtime Unleash feature flags.