Senior Software Engineer (Full stack with Blockchain/Crypto Knowledge)

Role Overview

We’re looking for a Senior Backend Engineer who can architect, build, and scale critical backend systems. You’ll work on high-throughput financial workflows, third-party integrations, and transaction-heavy systems - potentially including crypto/blockchain rails as we expand. This is not a ticket-closing role. This is a systems-thinking, architecture-owning role.

What You’ll Do

• Design and own scalable backend architecture
• Build high-performance APIs handling real-money transactions
• Lead system design discussions and technical decisions
• Architect reliable integrations with financial institutions, brokers, payment partners, and crypto/blockchain providers
• Improve system resilience, observability, and fault tolerance
• Optimize databases and reduce latency across services
• Establish engineering best practices and mentor junior engineers
• Handle production incidents and drive long-term fixes

Tech Stack

Our backend is primarily built on Node.js, with Python used for select services. We use Express.js and FastAPI to build scalable APIs. Our data layer runs on PostgreSQL and MongoDB, with Redis used for caching and performance optimization. We leverage Kafka and RabbitMQ for asynchronous and event-driven workflows. Our infrastructure is hosted on AWS, with Docker and CI/CD pipelines enabling smooth deployments. We design and maintain REST APIs and Webhooks for integrations. Infrastructure: AWS - GCP (EC2, RDS, S3, Lambda, IAM, VPC and equivalent) Containerization & CI/CD: Docker, automated pipelines API Standards: REST, Webhooks, async callbacks Security: OAuth2, JWT, encryption at rest and in transit

Requirements

• 6-8 years of strong backend engineering experience with 2+ years leading architecture or owning critical systems
• Deep understanding of distributed systems and system design
• Experience building high-transaction, low-latency systems
• Strong experience with database optimization and scaling
• Production experience with AWS and Google Cloud infrastructure
• Experience in crypto / blockchain / digital assets infrastructure is highly preferred

Domain Knowledge (Highly Preferred)

• Crypto / blockchain infrastructure
• Wallet architecture (custodial or non-custodial)
• On-chain vs off-chain transaction workflows
• Stablecoins, token transfers, gas mechanics
• Banking rails (ACH, SWIFT, RTGS, SEPA)
• Understanding of compliance-sensitive systems (KYC/AML flows)

Leadership & Ownership

• Strong technical decision-making skills
• Ability to balance speed vs. system safety
• Comfortable operating in high-accountability environments
• Clear communicator with product and business stakeholders

Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.