Full-Time

Lead API Engineer

Posted on 7/29/2025

sFOX

sFOX

51-200 employees

Cryptocurrency trading platform with deep liquidity

No salary listed

Remote in USA

Remote

Category
Software Engineering (1)
Required Skills
PHP
Elixir
Python
JavaScript
MySQL
Laravel
Ruby
SQL
Postgres
TypeScript
Go
REST APIs
Django
Requirements
  • 8+ years experience as a professional software engineer with at least 3 focused on Backend/API services
  • Experience deploying and architecting back end applications that service single page applications, mobile applications, and/or public api consumption using Node.js
  • Experience with Ruby/Rails, Python/Django, PHP/Laravel, Go or Elixir/Phoenix will also be considered
  • Experienced in Typescript or javascript with knowledge of typed languages
  • Experience with Relational Databases such as MySQL, Postgresql, MSSQL, etc
  • Familiar with writing and maintaining automated test suites
  • B.S., M.S., or Ph.D. in Computer Science or similar technical field of study (or equivalent practical experience)
Responsibilities
  • Build performant API endpoints
  • Maintain backward compatibility with existing clients
  • Give quality feedback on code review with peers
  • Contribute to the technical direction of the API
  • Develop and execute against both short- and long-term roadmaps by making effective tradeoffs that consider business priorities, user experience, and a sustainable technical foundation
  • Teach and mentor other developers through pair programming sessions, code reviews, and 1:1s
Desired Qualifications
  • Experience deploying and maintaining public APIs
  • Experience setting up and managing CI/CD pipelines
  • Experience with modern frontend paradigms such as ember, react, vue, svelte
  • Experience with gRPC
  • Advanced Experience with SQL, specifically MySQL
  • Experience working with websockets and real time data
  • Experience in high-frequency or algorithmic trading
  • Experience in trading cryptocurrency
  • Experience in a leadership role

SFOX is a fintech platform for cryptocurrency trading that aggregates liquidity from multiple sources so clients can access deep liquidity and competitive prices through one account. It provides secure custody with patented insured wallet technology and strong compliance controls trusted by large institutions. It offers advanced trading tools, including algorithmic strategies and an API for connecting client systems and automating trades. It earns revenue from transaction and service fees and aims to deliver a reliable, efficient, and compliant crypto trading experience for both individuals and institutions.

Company Size

51-200

Company Stage

Series A

Total Funding

$23M

Headquarters

San Francisco, California

Founded

2014

Simplify Jobs

Simplify's Take

What believers are saying

  • Nomura's Laser Digital partnership launched joint liquidity for deeper institutional access.
  • 'sFOX Connect' integrates end-to-end crypto into financial services businesses in 2024.
  • Prime brokerage delivers 10x faster execution and U.S. regulatory compliance in 2025.

What critics are saying

  • IRS accesses sFOX client data via M.Y. Safra Bank, causing client exodus now.
  • FalconX's 40+ venues and lower fees erode sFOX's institutional market share.
  • Coinbase Prime consolidates custody under SEC rules, sidelining sFOX's model.

What makes sFOX unique

  • sFOX aggregates liquidity from 40+ exchanges across 150+ markets via master order book.
  • sFOX provides patented insured wallet custody trusted by billion-dollar institutions.
  • sFOX offers 15+ algorithms, API integration, and e-OTC for institutional traders.

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Benefits

Remote Work Options

Growth & Insights and Company News

Headcount

6 month growth

5%

1 year growth

5%

2 year growth

3%
CRYPTOMERIA LABS PTE. LTD.
Nov 19th, 2025
sFOX And Nomura's Laser Digital Partner To Expand Institutional Crypto Market Access

sFOX and Nomura's Laser Digital partner to expand institutional crypto market access. sFOX and Nomura's Laser Digital have launched a joint liquidity offering to provide deeper market access, improved execution, and an infrastructure for institutional digital asset trading. Provider of cryptocurrency and stablecoin infrastructure for businesses, sFOX and Laser Digital, the digital assets division of Nomura Group, have announced the launch of a joint institutional liquidity offering. The partnership brings together two established organizations focused on delivering institutional-level access, advanced execution capabilities, and resilient infrastructure in digital asset markets. The collaboration is designed to provide institutional clients with deeper aggregated liquidity by integrating sFOX's master order books with Laser Digital's market-making expertise and credit capacity, aiming to enhance market depth and tighten spreads. Execution quality is improved through optimized handling of block trades and derivative or structured transactions, leveraging diversified sourcing and sophisticated routing strategies. Both firms maintain high standards of regulatory compliance across multiple jurisdictions, offering clients a framework of institutional-grade risk assurance. Additionally, operational efficiency is strengthened by providing access to products and services through consolidated channels, reducing friction in settlement, custody, and trading support. Akbar Thobani, CEO of sFOX, stated that the partnership with Laser Digital aims to provide institutional clients with improved liquidity and execution capabilities. He emphasized that the collaboration reflects a commitment to offering extensive market access and deep order books, alongside the confidence, trust, and regulatory framework necessary for large-scale cryptocurrency trading. Cameron Dickie, Head of Distribution in the Trading Division at Laser Digital, noted that the collaboration combines the firm's traditional finance expertise, risk management practices, and market-making capabilities with sFOX's liquidity network and execution technology. He highlighted that institutional engagement in digital assets requires both reliable performance and trust, which the partnership seeks to deliver. Delivering institutional-grade infrastructure and liquidity solutions for global digital asset markets. sFOX provides infrastructure designed to make digital assets accessible, efficient, and reliable for institutions and businesses globally. The platform consolidates liquidity from over 40 leading exchanges and OTCs across more than 150 markets, offering a master order book that facilitates improved pricing, reduced slippage, and expanded execution options. Recognized as a comprehensive cryptocurrency and stablecoin platform for institutional investors and businesses, sFOX delivers institutional-grade liquidity, security, and scalability, enabling firms to trade, settle, and leverage digital asset capabilities with confidence. Laser Digital, a wholly owned subsidiary of Nomura, focuses on connecting traditional finance with digital assets. The firm offers trading, market-making, cross-asset liquidity solutions, treasury and asset management, as well as venture and strategic investment services. Its trading operations feature quantitative-driven liquidity provision, market-making, token strategies, and the provision of live, executable two-way price streams in cash and derivatives for cryptocurrency and FX, all supported by rigorous risk management. Laser Digital has obtained the necessary regulatory licenses from Dubai's VARA and Abu Dhabi's ADGM.

WebWire
Jan 29th, 2024
sFox Leading Digital Asset Prime Broker Launches 'sFOX Connect' End-To-End Crypto Service Provider

sFOX, the leading digital asset prime broker and qualified custodian, proudly announces the launch of its latest 2024-era crypto integration solution, 'Connect,' touted as the most efficient way to integrate end-to-end crypto capabilities into an existing financial services businesses.

PYMNTS
Sep 26th, 2022
Report: Irs ‘Steps Up’ Work To Find Crypto Tax Evaders

The Internal Revenue Service (IRS) has reportedly “stepped up” its pursuit of taxpayers who haven’t reported and paid taxes on cryptocurrency transactions by getting a court order to gain access to a bank’s data relating to customers who used a digital currency broker. The court order requires M.Y. Safra Bank to turn over data for sFOX, a digital broker that used the bank, CNBC reported Monday (Sept. 26)

Cointelegraph
Feb 21st, 2020
Ravencoin Community Clash Over Mining Algorithm Continues

Despite hard forking five months ago to resist ASICs, the Ravencoin community has found consensus surrounding its next algorithm.

Cointelegraph
Feb 8th, 2020
Truth About Crypto Price Correlation: How Closely Does ETH Follow BTC?

While it’s commonly believed that the price of ETH follows Bitcoin, research shows that ETH is an independent asset.

INACTIVE