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IEX

Equities trading exchange with data platform

Software Engineer - Data

Full-Time
$150k - $175k/yr+ Bonus + Equity
Mid
New York, NY, USA
In Person
Software EngineeringBackend Engineering

About the job

Requirements
  • Strong proficiency in C, C++, or another compiled language.
  • At least 3 years of professional software engineering experience.
  • Experience working with data-intensive systems or large datasets.
  • Strong understanding of developing and troubleshooting applications in Linux environments.
  • Experience with modern software development practices, including code reviews, version control, automated testing, and continuous integration and continuous delivery.
  • Ability and openness to participate in operational and on-call rotations.
  • Familiarity with using artificial intelligence-assisted development tools and agentic coding workflows.
Responsibilities
  • Design and develop scalable applications for data platforms.
  • Maintain and support critical data services, including participating in support rotations.
  • Perform data maintenance, backups, and security checks.
  • Optimize data access.
  • Integrate and manage third-party data sources and feeds.
  • Ensure data security in accordance with internal policies and procedures.
  • Build graphical user interface tools to help visualize data.
Desired Qualifications
  • Experience with KDB+/Q in a production environment or openness to learn it.
  • Experience in Python.
  • Understanding of financial markets or experience with trading systems.
  • Exposure to working with an order management system.
  • Knowledge of the Financial Information eXchange protocol.

About the company

IEX operates a family of financial technology products centered on making markets more transparent and data-driven. Its flagship IEX Exchange aims to provide a fairer trading environment in the U.S. equities market. Beyond the exchange, IEX Cloud offers a data platform with APIs for buying, sharing, and using market and other data, while IEX Astral helps institutional traders analyze the lifecycle of their orders. In Web3, Dispatch provides on-chain messaging and analytics, and SwXtch.io adds bare-metal capabilities to virtual cloud networks. The company earns revenue from exchange transaction fees, data subscriptions, and licensing of its technology. Overall, IEX combines trading, data, analytics, and blockchain-enabled solutions to help clients trade more efficiently and make informed decisions.

Company Size

51-200

Company Stage

Series C

Total Funding

$100.9M

Headquarters

New York City, New York

Founded

2012

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Simplify's Take

What believers are saying

  • OCC began clearing IEX Options on October 5, 2026, validating launch readiness.
  • IEX reported 3.8% overall market share and 4.7% intraday share in Q2 2026.
  • September 2026 fee and listing rule filings show IEX monetizing options membership immediately.

What critics are saying

  • Citadel Securities keeps attacking IEX’s options model, preserving legal overhang after launch.
  • Maker-taker giants can undercut IEX’s economics, compressing adoption among brokers and market makers.
  • If options volume disappoints, IEX remains a niche equities venue with fragile scale.

What makes IEX unique

  • IEX’s 350-microsecond speed bump and Signal define its anti-latency-arbitrage pitch.
  • D-Limit claims 64 mils/share improvement and 73% stable volume in July 2026.
  • IEX Options launched October 2, 2026, extending the fairness brand into derivatives.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

401(k) Company Match

401(k) Retirement Plan

Unlimited Paid Time Off

Flexible Work Hours

Paid Parental Leave

Company News

Traders Magazine
Mar 25th, 2025
IEX Appoints Steven Bonanno as Chief Information Officer

NEW YORK - March 25, 2025 - IEX Group, Inc. (IEX) today announced the appointment of Steven Bonanno as Chief Information Officer (CIO) to support ongoing company growth and innovation in exchange technology.

FX Insider
Sep 16th, 2024
IEX Group Set to Launch Innovative U.S. Options Exchange

IEX group set to launch innovative U.S. Options exchange.

PR Newswire
Sep 16th, 2024
IEX Enters Options Market with Top Talent and Innovative Solutions

IEX also introduced D-Limit, the only displayed order type designed to obtain pre-trade price improvement, enabling Members to achieve prices better than their initial limit price.

PR Newswire
May 3rd, 2024
Iex Strengthens Organization Through New Leadership Appointments

Seasoned Exchange and Capital Markets Executive, Bryan Harkins , Joins IEX Co-Founders as Group President to Lead IEX's Commercial GrowthIEX's Co-Founder, Ronan Ryan , Steps Into the Role of Group Chief Operating OfficerIEX Promotes Florian Seifferer to Group Chief Strategy OfficerNEW YORK, May 3, 2024 /PRNewswire/ -- IEX Group, Inc. (IEX) today announced the appointment of Bryan Harkins as its President, Ronan Ryan as its chief operating officer (COO), and Florian Seifferer as its chief strategy officer (CSO).Harkins is a great addition to the already strong IEX leadership team, with his extensive background in multi-asset exchange trading, Fintech, and capital markets. He brings exceptional experience in advancing product development and driving growth of trading platforms.Before joining IEX, Harkins held roles as the EVP, Head of Markets at Cboe Global Markets overseeing equities, derivatives, and foreign exchange trading, was the President of BIDS trading, the EVP and Head of Markets at BATS Global Markets, the Chief Operating Officer of Direct Edge, and the Chief Revenue Officer of Trumid."Bryan brings tremendous leadership experience across a number of asset classes which is extremely valuable given IEX's potential for growth both now and into the future," said IEX Co-Founder and CEO, Brad Katsuyama. "He has built trusted relationships with a wide variety of market participants, and we could not be more excited to have him be a part of our executive team and what we are building at IEX."In addition to his many leadership roles in the industry, Harkins co-founded Wall Street Rides FAR (for autism research) with his wife in 2015 and serves on the Board of Directors for the Autism Science Foundation."I have watched and admired IEX's innovation and unique approach in a competitive market. They have built a great business, and I am honored to bring my experience to help them execute on the next chapters of their growth and evolution," said Harkins.In the role of Group COO, IEX's co-founder, Ryan, will focus on corporate development, strategic planning, and guide the long-term initiatives aimed at promoting IEX's growth and profitability."Ronan and I have been at the heart of driving IEX forward since we co-founded the company over a decade ago," said IEX Co-Founder and CEO, Brad Katsuyama. "This move will allow IEX to expand the breadth of our executive team as we enter an important competitive period with pending regulatory and market structure changes

PR Newswire
Jun 6th, 2023
Swxtch.Io Launches Industrial Internet Of Things Commercial Offering

NEW YORK, June 6, 2023 /PRNewswire/ -- swXtch.io LLC, a wholly owned subsidiary of IEX Group, Inc., today announced the launch of its Internet of Things (IOT) commercial offering for cloudSwXtch. This offering will help companies accelerate digital transformations and migrate high-performance workloads to the cloud, which was not previously possible.cloudSwXtch is an important advancement for the IOT ecosystem as it introduces the ability for users to equip cloud networking stacks with features that are relied on by on-prem workflows. Several top features now accessible with the availability of cloudSwXtch include multicast, high-availability, and Precision Time Protocol (PTP), among others. To illustrate these capabilities, two leading workflows are outlined below, cloud-based audio & video monitoring and virtual test & simulation.Brent Yates, CEO of swXtch.io, commented on the news, "Cloud computing has been a cornerstone of IOT industry growth, driving new heights in asset and operational performance and opening the door to new business models. With cloudSwXtch, no-code multicast enablement is available to network engineers for the first time on all the major clouds."Cloud-Based Audio & Video MonitoringLocal and state governments often rely on large, rugged camera networks to monitor thousands of real-time streams for traffic, emergency management, and other services. These networks overwhelmingly originate and distribute multicast streams, which were previously incompatible with existing cloud networks.cloudSwXtch offers two primary features to support the migration of these video monitoring workflows from on-prem to cloud: the ability to enable multicast traffic distribution from on-prem to edge and cloud environments and the ability to enable bandwidth conservation using the dynamic bridge feature