Senior Backend Engineer - Python

2 days ago

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Silver.dev

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Silver. dev is a company dedicated to helping remote engineers find jobs at American tech startups. Founded by engineers for engineers, Silver. dev focuses on advocating for talented individuals by offering direct positions with startups, not acting as a middleman. The company supports a wide range of job seekers, from entry-level to those seeking top-of-market salaries, and provides resources and interview preparation to help candidates succeed. Silver. dev values mission and authenticity, sharing insights through its podcast, "Tecnología Informal. " They also offer services like English coaching and career leveling resources through SilverEd.

2 - 10 employees

🎯 Recruitment

👥 HR Tech

🤝 B2B

📋 Description

• We are looking for outstanding talent looking to make an impact and be a technical leader at a highly critical payment infrastructure engineering organization. • The compensation listed is estimated and heavily based on concrete experience in the industry and in systems that handle money critically. • Build and scale kamiPay core solution powering real-time cross-border payments via blockchain and RTP systems like Pix and Transferencias 3.0. • We seek a proven Senior BackEnd Software Engineer who has architected, developed, deployed, and maintained mission-critical systems handling high transaction volumes (e.g., fintech, banking, or distributed platforms). • You must demonstrate experience scaling systems from early-stage MVP to production-grade reliability and have a track record of solving scalability, latency, and resilience challenges.

🎯 Requirements

• 7+ years of BackEnd development with Python (async frameworks like FastAPI, Django) and SQL. • Strong expertise in designing RESTful APIs for high-traffic systems (1k+ TPS) with strict SLAs. • Hands-on experience with cloud architectures (AWS preferred: ECS, Lambda, RDS, SQS/SNS). • Proven ability to build async task processing (Celery, Redis) for real-time payment transactions, reconciliation, fraud checks, or batch processing. • Good DevOps Practices: CI/CD (GitHub Actions), IaC (Terraform), and monitoring (Sentry, Cloudflare, Cloudwatch, Prometheus, Grafana, Datadog). • Observability-Driven Development: Built systems with observability "baked in" (custom Sentry tags, structured logging, metrics for business-critical transactions). • Hands-on experience with error-tracking tools like Sentry to debug, diagnose, triage, and resolve issues in real-time. • Familiarity with performance profiling (e.g., identifying memory leaks, slow SQL queries) in high-throughput systems. • Production Battle Scars: Shipped systems that process 300K+ daily transactions or handle 5k+ concurrent users. • Experience with financial-grade uptime (99.99%+) and disaster recovery (multi region/active-active setups). • Debugged and resolved production incidents (e.g., race conditions, deadlocks, API throttling). • Scalability from Scratch: Built systems from MVP to scale (e.g., re-architected monoliths to microservices, optimized databases for low-latency queries). • Implemented performance tuning (caching with Redis, query optimization, load and stress testing). • Familiarity with payment rails (Pix, SEPA, SWIFT, Transferencia 3.0, etc) or blockchain (crypto wallets, send transactions). (Nice to have)

🏖️ Benefits

• Solve hard problems at the intersection of blockchain and real-time payments across multiple countries. • Work with a team that’s shipped production-grade fintech systems (no “theoretical” engineering). • We have Product Market Fit: If you heard the word Pix in Argentina, it's because kamiPay introduced it to the market.