Senior/Staff Backend & Platform Engineer (FinOps, IAM & Blockchain)

TechChain Talent; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

A leading tech company based in New York is seeking a Senior / Staff Backend & Platform Engineer to own critical systems within their stack, including identity/access management, funds movement, and blockchain infrastructure. Applicants should have 5-12+ years of engineering experience in fintech or similar domains, with a track record of designing and operating high-scale systems. This role will also involve leading technical projects and mentoring other engineers. A hybrid work model is available.

Qualifications

• 5-12+ years of backend or product or platform engineering experience.
• Deep expertise in identity & access, financial systems, or blockchain infrastructure.
• Strong experience designing and operating distributed systems.

Responsibilities

• Design, build, and operate Identity & Access Management services.
• Own financial operations systems; handle transfers, payments, and ledgering.
• Define reliability and observability standards for core services.

Skills

Identity & Access Management

Financial systems

Blockchain infrastructure

Distributed systems

Monitoring and incident response

Tools

Flutter

React Native

Google Cloud

AWS

Job description

About the Role

As a Senior / Staff Backend & Platform Engineer at Moonshot, you'll own some of the most critical systems in our stack: identity and access, funds movement and ledgering, and the blockchain infrastructure that powers our on-chain trading. This role is similar to staff engineers at leading crypto wallets and exchanges who own authentication stacks, keymanagement, and high-scale financial backends. You'll design, build, and operate systems that must be both highly reliable and extremely secure, enabling product teams to move quickly on a solid foundation.

Key Responsibilities

• Design, build, and operate Identity & Access Management services: authentication flows, sessions, device trust.
• Authorization and entitlements (roles, permissions, policies).
• Security controls such as MFA and key management (working with security teams).
• Own financial operations systems: transfers and payments orchestration; ledgering and reconciliation flows; limits, risk controls, and transactional correctness.
• Build and maintain blockchain infrastructure: node and RPC management; transaction submission, monitoring, and retry logic; indexing and streaming of on-chain data into internal services and data stores.
• Define and uphold reliability and observability standards: SLOs and error budgets for core services; dashboards, alerts, runbooks, and incident management practices.
• Lead large, cross-functional technical projects from design through rollout, collaborating with Product, Security, and Ops.
• Mentor and guide other engineers, contributing to engineering standards, design reviews, and documentation.
• Stay close to industry best practices in auth, key management, and secure infrastructure for crypto and trading.

Requirements

• 5-12+ years of backend or product or platform engineering, including experience with high-scale, high-availability systems in fintech, crypto, or similar domains.
• Deep expertise in at least one of: Identity & access / security engineering; Financial systems / ledgering / payments; Blockchain infrastructure / on-chain data.
• Strong experience designing and operating distributed systems (datastores, queues, streaming, background workers).
• Track record driving architecture decisions and seeing them through implementation and adoption.
• Strong operational mindset: monitoring, on-call, incident response, and postmortems.

Bonus Skills

• Experience with Flutter, React Native, React, Headless CRMs.
• Experience with Go, Rust, Solana.
• Experience with Google Cloud or Amazon Web Services.
• Experience with crypto wallets, exchanges, or onchain protocols including DeFi, L2s, ZK.
• Exposure to data warehousing and analytics for financial reporting.
• Contributions to open-source projects.