Full-Time

Senior Software Engineer

C++

Flow Traders

Flow Traders

501-1,000 employees

Global liquidity provider for ETPs

Compensation Overview

$185k - $225k/yr

+ Annual discretionary variable remuneration

New York, NY, USA

In Person

The role is described as being in New York or Chicago; the ATS location specifies New York.

Bachelor's, Master's, PhD

Category
Software Engineering (1)
Required Skills
Rust
Python
Quantitative Research
Data Structures & Algorithms
TypeScript
Observability
REST APIs
C/C++

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Requirements
  • A Bachelor of Science, Master of Science, or PhD in Computer Science, Mathematics, or an equivalent field.
  • At least 5 years of post-graduation professional C++ software development experience; proprietary trading industry experience is preferred.
  • Ability to write clean, reliable, and highly scalable code.
  • Good knowledge of algorithms and data structures.
  • Experience with parallel, asynchronous, and multithreaded programming.
  • Interest in achieving maximum performance from available hardware and software.
  • Ability to communicate with technical and non-technical business colleagues.
Responsibilities
  • Lead the development and global rollout of the Core platform across market data, quantitative research, pricing, and strategies focus groups.
  • Participate in a fast-paced iterative development process, deploying deliverables and validating them independently or with traders and quantitative researchers.
  • Develop tools and frameworks for tuning and developing data-driven systematic pricing and trading strategies.
  • Collaborate with focus-group engineers, quantitative researchers, and technical traders to refine requirements, collect feedback, and iterate on platform design and implementation.
  • Write software that communicates with exchanges through APIs, receiving market data and sending orders over networks using protocols such as FIX, WebSocket, and HTTP requests.
  • Use, maintain, and extend testing suites to ensure software quality.
  • Optimize exchange communication through kernel bypass, TLS optimization, and connection handling.
  • Research exchange behavior in detail to align software behavior with exchange behavior.
  • Implement exchange connectivity solutions using exchange software development kits in C++, Rust, Python, and TypeScript.
  • Implement trading algorithms based on requirements from traders and quantitative researchers.
  • Acquire and develop trading knowledge to translate trader and quantitative-research requirements into software implementations.
  • Improve the stability, reliability, and performance of the trading engine.
  • Enhance monitoring and observability in collaboration with the Trading Operations team.
  • Investigate and resolve production issues, including crashes, unexpected business-logic behavior, and performance bottlenecks.
  • Prepare releases and deployments of new trading-engine versions.
Desired Qualifications
  • Experience in the proprietary trading industry.

Flow Traders provides liquidity in global financial markets by acting as a market maker for Exchange Traded Products (ETPs) and other listed instruments. It uses a proprietary technology platform to continuously quote bid and ask prices for thousands of ETP listings, helping buyers and sellers execute trades with tight spreads. The company earns money from the bid-ask spread and trading fees, leveraging high-frequency, low-margin trading across major markets worldwide (Americas, APAC, EMEA). Flow Traders differentiates itself through its large-scale, technology-driven approach and specialization in liquidity provision for ETPs, backed by a global footprint and a focus on reliability for institutional clients like hedge funds and asset managers. Its goal is to improve market efficiency by ensuring there are always ready buyers and sellers, while pursuing sustainable growth and responsible corporate citizenship.

Company Size

501-1,000

Company Stage

IPO

Headquarters

Amsterdam, Netherlands

Founded

2004

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Simplify Jobs

Simplify's Take

What believers are saying

  • H1 2026 net trading income rose 7% to €303.7 million.
  • Trading capital reached €1.15 billion, lifting 2Q26 return on capital to 53%.
  • Management kept 2026 expenses capped at €235-245 million despite expansion.

What critics are saying

  • Digital assets NTI fell 36% in H1 2026 as crypto activity weakened.
  • Fixed operating expenses rose 15% in H1 2026 because technology spending keeps climbing.
  • The $200 million private facility secures materially all assets and enforces a 3:1 ratio.

What makes Flow Traders unique

  • Flow Traders' 2Q26 engine quoted €637 billion of ETF volume.
  • Its 24/7 tokenized OTC desk prices BENJI, Tether Gold, equities, and commodities.
  • Horizon 2030 links proprietary technology, trading capital, and selective hiring.

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Benefits

Medical, Vision, Dental Insurance coverage

401(k) plan with generous match

In-house lounge with a bar, game consoles, poker & billiards tables

Daily catered lunch, cold brew coffee on tap and a fully stocked kitchen

Weekly table massages and bi-weekly haircuts

Annual company trip and a variety of events throughout the year

Reimbursed gym membership or home equipment and other wellness initiatives

Global rotations between our offices worldwide

Flow Academy for continuous learning and opportunities to attend industry seminars and conferences

Growth & Insights and Company News

Headcount

6 month growth

1%

1 year growth

0%

2 year growth

2%
Yahoo Finance
Aug 1st, 2026
Flow Traders posts $46.1M Q2 profit with 53% return on capital despite 14% market decline

Flow Traders reported a net profit of €40.8 million for Q2 2026, with earnings per share of €0.93. The company achieved a 53% return on trading capital and maintained a 43% EBITDA margin. Despite global ETF market volumes declining 14% quarter-on-quarter, Flow Traders' ETF value traded increased 34% year-on-year, demonstrating resilience in its market-making model. Shareholders' equity reached a record €970 million, up 6% quarter-on-quarter. The digital assets business faced challenges, with net trading income down 36% year-on-year for the first half. Bitcoin's 33% year-to-date decline negatively impacted crypto market activity. Fixed operating expenses rose 15% year-on-year for the first half, driven by technology investments. The company maintained its full-year expense guidance of €235 million to €245 million.

The Block
Jun 24th, 2026
a16z CSX-backed Cambrian raises $6M seed to build blockchain data oracle network

Cambrian, a blockchain data infrastructure startup, has raised $6 million in seed funding co-led by Franklin Templeton and Polychain Capital. Flow Traders, Selini Capital, Paper Ventures and Nomad Capital also participated, alongside angel investors. The round, structured as a SAFE with token warrants and closed last month, brings Cambrian's total funding to $11.9 million, including a $5.9 million pre-seed round led by a16z Crypto Startup Accelerator last year. Founded in 2024, Cambrian provides an API delivering real-time and historical blockchain data covering yield, risk, lending rates and market sentiment. The company plans to expand into a verifiable oracle network for institutions and AI agents. The platform currently indexes $4.5 billion in lending total value locked and supports Base and Solana, with Ethereum mainnet coming next.

finews.com
Jun 9th, 2026
Swiss Fintech Raises 5 Million to Bring Structured Products Onto the Blockchain

Zug-based fintech TVL Capital has secured $5 million in fresh funding to accelerate the development of blockchain-native structured products. The company, founded by former executives from Morgan Stanley, UBS and The Block, aims to modernize a multi-trillion-dollar market by ...

KuCoin
Apr 9th, 2026
Pharos Network Completes $44M Series A, Total Funding Reaches $52M to Scale On-Chain Economy | KuCoin

Hong Kong, April 8, 2026 — Pharos Network, a Layer 1 blockchain network designed for institutional financial use cases, today announced the completion of a $44

Yahoo Finance
Apr 8th, 2026
Flow Traders launches 24/7 digital assets OTC platform as fair value holds at $34

Flow Traders' fair value estimate has been updated to €30.07 from €29.79, representing minimal adjustment that analysts characterise as fine-tuning rather than a fundamental reassessment. The tight valuation range suggests converging views amongst bullish and cautious analysts. The small revision indicates confidence in the underlying business model, though some analysts caution that limited upside remains if execution falters. The narrow spread suggests current valuations already reflect visible expectations, leaving little margin for error. Flow Traders recently launched a digital assets over-the-counter offering providing round-the-clock liquidity for tokenised money market funds, equities and commodities, including Franklin Templeton's BENJI and Tether Gold. The platform enables secondary market trading outside regular hours, with institutional access via FIX connectivity and OMS/EMS platforms.