Senior Backend Engineer (Go / Blockchain) – Fintech — Augmented

The Bitcoin Street Journal; Miami (FL); On-site; USD 150,000 - 230,000; Full time

Job summary

Augmented in Miami, FL is seeking a senior Go engineer to design and own core backend services for payments and digital-asset transfers. You will build high-throughput, low-latency systems, integrate with blockchains and wallets, and collaborate with product, compliance and security to uphold strong engineering standards.

You will own API design, data integrity, and reliability while helping scale a fintech platform that bridges traditional rails with blockchain networks.

Qualifications

• 6+ years of backend software engineering, with 3+ years writing production Go
• Hands-on experience building on blockchains and interacting with nodes/RPC
• Experience in financial systems where accuracy matters (payments, ledgers, settlement)
• Strong grasp of distributed systems concepts like idempotency and queues
• Solid SQL and data modeling for transactional workloads
• Production cloud experience (AWS or GCP), Docker and Kubernetes
• Security-first mindset around keys, secrets and sensitive financial data
• Clear written and verbal communication; ability to own decisions with non-engineers

Responsibilities

• Design, build and run high-throughput, low-latency Go services for payments and asset transfers
• Develop and maintain double-entry ledger and reconciliation systems
• Integrate with blockchain nodes and RPC providers for transactions and indexing
• Integrate with custody wallets and banking/payment partners
• Design APIs (REST/gRPC) and event flows with reliability and exactly-once semantics
• Own reliability: monitoring, alerting, on‑call, post‑mortems
• Embed security and compliance via audit trails, access controls and AML/KYC measures
• Review code, mentor engineers and drive technical design for new products

Skills

Go

Backend engineering

Distributed systems

SQL (PostgreSQL)

AWS

Kubernetes

CI/CD

Security best practices

API design

Leadership

Tools

Docker

Kubernetes

PostgreSQL

Kafka

Git

Job description

• Company: Augmented
• Location: FL Miami US
• Sector: Blockchain
• Source: web3.career

Our fintech client is hiring a senior Go engineer to build the backend services that move money and digital assets on‑chain, based in Miami, FL.

About the company

Our client is a fast‑growing fintech building financial infrastructure that connects traditional payment rails with blockchain networks. Their platform handles payments, settlement and digital-asset movement for institutional and consumer customers, in a regulated environment where correctness and security come first.

About the role

You will design and own core backend services in Go: ledgers, payment and settlement flows, wallet and custody integrations, and the services that read from and write to public blockchains. You will work closely with product, compliance and security, and help set engineering standards as the team grows. This is a hands‑on senior role with real ownership of systems that move money.

What you’ll do

• Design, build and run high‑throughput, low‑latency backend services in Go for payments, settlement and digital‑asset transfers
• Build and maintain double‑entry ledger and reconciliation systems that keep on‑chain and off‑chain balances in sync
• Integrate with blockchain networks (EVM chains and others) through nodes and RPC providers: transaction construction, signing, broadcasting, confirmation tracking, reorg handling and event indexing
• Integrate with custody and wallet providers (MPC or HSM‑based key management) and with banking and payment partners
• Design clean, versioned APIs (REST / gRPC) and event‑driven flows (Kafka or similar) with idempotency, retries and exactly‑once semantics where money is involved
• Own reliability: observability, alerting, on‑call, incident response and post‑mortems for the services you build
• Build in security and compliance from the start: audit trails, access controls, AML / KYC and travel‑rule touchpoints, SOC 2 controls
• Review code, mentor engineers and drive technical design for new products

What you bring

• 6+ years of backend software engineering, with 3+ years writing production Go (concurrency, goroutines and channels, profiling, testing)
• Hands‑on experience building on blockchains: interacting with nodes and RPC, constructing and signing transactions, smart‑contract integration, indexing on‑chain data
• Experience building financial systems where accuracy matters: payments, ledgers, trading, settlement or reconciliation
• Strong grasp of distributed systems: consistency, idempotency, message queues, failure handling
• Solid SQL and data modeling (PostgreSQL or similar) for transactional workloads
• Production experience on cloud infrastructure (AWS or GCP), Docker and Kubernetes, CI/CD
• Security‑first mindset around keys, secrets and sensitive financial data
• Clear written and verbal communication; comfortable owning decisions and working with non‑engineering stakeholders
• Authorized to work in the US and able to work from Miami, FL [Green Card or Citizenship only, no H1B sponsorship available]

Nice to have

• Solidity or Rust, or experience auditing and testing smart contracts
• Stablecoin, on/off‑ramp, tokenization or cross‑border payments experience
• Work with MPC custody providers (e.g., Fireblocks) or HSM‑based key management
• Familiarity with regulatory frameworks: MSB / money transmission, AML / KYC, travel rule, SOC 2, PCI DSS
• Open‑source contributions to Go or blockchain projects
• Prior startup or scale‑up experience