Sr. Backend Developer New York, NY (OnsiteHybrid) LOCALS only

W2 Contract Only No C2C

Job Title: Senior Backend Developer

Location: New York NY (Onsite/Hybrid) LOCALS only

Duration: 6-12 Months (W2 Contract)

Interview: Video and Onsite Interview

Visa- USC / GC/ GC-EAD/ H4 EAD/ TN Only

Job Description

Build and scale low-latency high-reliability backend services powering trading-adjacent and risk/treasury workflows. Youll lead development of microservices and APIs integrate with internal/front-office systems and collaborate closely with PMs/BAs quants and design/FE counterparts in an Agile/Scrum setup.

• Design implement and operate backend services (TypeScript preferred) in a microservices and event-driven architecture (Kafka/RabbitMQ) focusing on performance resilience and observability.
• Build secure versioned REST and GraphQL APIs; enforce schema governance pagination depth/complexity limits and query timeouts.
• Optimize request paths I/O and concurrency; avoid blocking the event loop; instrument and profile services (APM metrics tracing).
• Implement robust data access layers (PostgreSQL/Timeseries/NoSQL) caching (Redis) and message workflows (Kafka consumer groups idempotency DLQs).
• Ship to AWS/EKS with CI/CD; containerize with Docker; design for scale low latency and high availability (multi-AZ patterns).
• Enforce security best practices (OWASP/Node) secret management input validation rate limiting and dependency hygiene. If payments-adjacent align with PCI DSS controls.
• Partner with PM/BA front-end (React) and data/quant teams; translate business requirements into production-ready APIs and workflows with crisp stakeholder communication.

Required Qualifications

• 6 10 years total engineering 5 years (production services at scale). Deep understanding of Nodes async I/O and event loop characteristics.
• Strong TypeScript API design (REST & GraphQL) schema/versioning and contract testing.
• Proven experience building microservices and event-driven systems with Kafka/RabbitMQ (exactly once semantics patterns idempotency correlation IDs).
• SQL fluency (PostgreSQL or similar) caching (Redis) and performance profiling/optimization in production.
• Cloud-native delivery on AWS (Docker/Kubernetes CI/CD observability-metrics logs tracing) with HA/DR patterns for latency-sensitive services.
• Excellent communication and stakeholder-facing skills; comfort engaging PMs traders risk/treasury SMEs and external partners.

• Financial markets/hedge fund exposure (trade lifecycle market data risk treasury cash management).
• Experience with streaming/CEP time series storage or pricing/risk engines; GraphQL federation; API gateways.

Security/compliance familiarity (OWASP Top 10 npm supply-chain PCI DSS alignment where relevant).