Software Engineer, Backend

HIFI•New York, NY

6d•$135,000 - $160,000

About The Position

As a Senior Backend Engineer at HIFI, you'll own critical components of our payments infrastructure — from API design and data modeling to event-driven pipelines and financial-grade reliability. You'll work across the full lifecycle of modern money movement: account creation, fiat and stablecoin settlement, global payouts, and onchain connectivity. This is not a maintenance role. You'll solve hard, novel problems at the edge of what's possible in financial infrastructure, move fast, own your systems end-to-end, and directly shape how billions of dollars flow through the internet. If you touch it, you own it. That's how we work.

Requirements

Bachelor’s degree in Computer Science, Engineering, Math, or related STEM field, or equivalent practical experience.
2+ years of professional software development experience.
Proficiency in one or more programming languages (JavaScript/TypeScript with Node.js, Go, Python, etc.).
Experience working with RESTful APIs.
Experience with PostgreSQL or other relational databases.
Familiarity with cloud platforms (AWS, Azure, or GCP) and containerization technologies (Docker, Kubernetes).
Working knowledge of version control (Git), CI/CD pipelines, testing, and monitoring/observability tools.
Strong communication and collaboration skills with both technical and non-technical teams.

Nice To Haves

Knowledge of query optimization and database performance tuning.
Familiarity with concurrency control, distributed systems, and database transactions.
Experience working on distributed systems and optimizing them for scalability and performance.
Familiarity with event-driven architectures and messaging patterns (e.g., pub/sub, queues, streaming).
Exposure to job queues, caching services, and data pipelines.
Understanding of security best practices and a commitment to correctness in financial systems.
Experience building and launching a product from zero to one.
Background or interest in financial systems, payments, or blockchain/crypto technologies is a plus.

Responsibilities

API Development: Design, implement, and optimize APIs that connect businesses to HIFI’s financial infrastructure platform, with a focus on performance, reliability, and developer experience.
Core Infrastructure: Build and scale backend systems that process transactions, ensure correctness, and provide strong guarantees around scalability, reliability, and fault tolerance.
System Performance: Continuously improve throughput, efficiency, and resilience across distributed services.
Collaboration: Work closely with product, compliance, and business teams to deliver end-to-end solutions.
Ownership: Participate in technical roadmap planning and carry projects from design through production.
User Focus: Engage with customers to understand their needs and translate them into effective solutions.