Swapnil Amin

Backend-heavy Software Engineer specializing in distributed systems, high-throughput financial infrastructure, and applied AI orchestration. Track record of owning complex architectures from problem definition to rapid production deployment.

Fintech & Infrastructure: Architected ValoraPays—a crypto payment gateway using 8 NestJS microservices (gRPC), polyglot data layers (Postgres, ClickHouse, Redis, Kafka), and a 20+ factor routing engine achieving sub-2ms cached decisions.

Applied AI & Web3: Built Multi-Agent workflows (LangChain, LlamaIndex, RAG) on GCP for Growstack.ai, alongside enterprise HNI OTC crypto trading engines with sharded MongoDB architectures.

Obsessed with shipping fast, technical ownership, and eliminating engineering bottlenecks in unstructured startup environments.

Software Engineer 2 at Webbuddy Agency (2024-06 – Present)

• Solely architected ValoraPays (Link), a high-risk crypto payment gateway with 8 NestJS microservices communicating via gRPC (protobuf), and polyglot persistence across PostgreSQL, ClickHouse, Redis, and Kafka, and a multi-tenant API gateway with 4 auth strategies (API key/salt, merchant JWT, admin JWT, webhook signature) — achieving sub-200 ms API response times.
• Built a smart routing engine with 20+ factors (TSP performance, cost, latency, bank compatibility, geo, time-based) and 6 integrated payment processors (Razorpay, Stripe, Kingdom Bank, Paytara, Sulifu Pay, Payaza) with pluggable adapters, circuit breakers, and multi-layer failover chains — delivering sub-2 ms cached routing decisions.
• Built a fraud detection engine with multidimensional risk scoring (amount anomaly, velocity checks, device fingerprinting, IP reputation) and a gaming-compliance engine with 4 customer risk tiers, daily/weekly deposit caps, and AML-ready transaction monitoring; designed ClickHouse analytics pipeline via Kafka ETL for real-time merchant and admin reporting.
• Architected CryptoOTC (Link) an enterprise HNI OTC crypto trading platform with a multi-mode RFQ engine (Block Trading, P2P Negotiation, anonymous Dark Pool matching) for $100K+ institutional trades; integrated Sumsub KYC/AML pipeline and sharded MongoDB with 15+ collections using compound, partial, and TTL indexes for high-write trading workloads.
• Engineered a zero-counterparty-risk escrow engine on Fireblocks MPC; implemented real-time balance sync to prevent double-spending, pending-tx safeguards to block escrow races, pre-validation to avoid partial failures, webhook-based reconciliation, and SLA-driven dispute escalation with full audit trails.
• Architected backend of Growstack.ai (Link) with MCP servers, AI-agent orchestration via LangChain, LlamaIndex, RAG, and LLaMA 3 (7B) on GCP; delivered a production MVP in under 3 months with CI/CD, automated workflows across Google Ads, Meta, Airtable, and Slack.

Software Engineer at Define Next (2023-03 – 2024-06)

• Led the Node.js backend for OffsetGo.earth, a blockchain carbon credit trading platform; built smart contracts and REST APIs, enabling onboarding 500+ users and processing 10K+ transactions/day, using Solana for low-latency execution.
• Managed the company's AWS organization; implemented IAM best practices and CloudWatch monitoring, improving system reliability to 99.9% uptime.

B.Tech in Computer Science and Engineering – Rashtriya Raksha University (2019-07 – 2023-06)