PRIVATE · PRIME · FalconX

Senior Trading Systems Developer

Low-latency trading systems in New York. Rust or Java, Aeron, FIX. Expected base $179,000–$226,000 USD in the New York City area, as of the day the post was generated. Last priced round we will cite is June 2022 at $8 billion.

You are deciding whether to write low-latency order and market-data services, in Rust and Java, against an $8 billion private mark from June 2022 that nobody has publicly replaced.

Blockchain Lab analysis, for a candidate deciding whether to apply. We are not the employer. Compensation on this posting: Employer-stated base: $179,000–$226,000 USD in the New York City area. The posting says that was the expected range when the post was generated, with bonus and equity outside it..

Listing age

20 days

Equity

Private. Illiquid.

Last priced mark

$8 billion

Where

New York City, NY

Status: Open on the employer board — checked 2026-10-06
Board updated: 2026-09-16 · 20 days before this check
Location: New York City, NY
Remote eligibility: Not disclosed. The posting’s location is New York City, and the pay sentence is for the New York City area.
Employment: Not disclosed
Compensation: Employer-stated base: $179,000–$226,000 USD in the New York City area. The posting says that was the expected range when the post was generated, with bonus and equity outside it.
Experience, as stored: 5+ years in trading systems, ideally with design ownership. Rust and/or Java, including concurrency or performance work. From the posting.
Original post date: Not disclosed

Apply on the employer site The company

Event indexer with reconciliationDrop the duplicate, net 45

Decision board

Blockchain Lab analysis

Apply if

Five or more years in trading systems, with design ownership, as they ask.
You have profiled Rust or Java for real, including concurrency.
You will work in New York City.

Do not apply if

You are a DeFi protocol engineer hoping the words 'trading systems' are loose.
You need a 2026 valuation. We do not have a newer priced round.
You think the band is national. It says the New York City area.

You would own

A slice of the execution stack: schemas, gateways, and the lifecycle of an order.

You would not own

It does not own a DeFi protocol, a 2026 valuation, or a remote policy.

What they wrote, and what we read

Employer stated

Low-latency services on Aeron: OMS/EMS, market-data pipelines, venue gateways.

Reading

This is exchange connectivity and order state, not a smart contract. If Aeron is new to you, say so.

Employer stated

Expected base $179,000–$226,000 USD in the New York City area, plus bonus and equity. Figure as of post generation.

Reading

They dated the band. Ask whether it has moved since 16 September 2026, and what the bonus has actually paid.

Employer stated

Integrate FIX, REST, WebSocket, and venue-specific protocols.

Reading

The work is other people's APIs breaking. Bring an incident, not a framework list.

Reuters reported on 22 June 2022 that FalconX was valued at $8 billion in a $150 million round led by GIC and B Capital, more than double an August 2021 mark of $3.75 billion. Raghu Yarlagadda, founder and CEO, was the person on that story. Some of that round was secondary. Four years is a long time in this market. Do not walk in with $8 billion as your option's denominator.

The posting is an institutional prime broker's engineering req. The NY band is real and narrow. The interesting risk is not the cash. It is whether the desk you join is still the one that wrote the Aeron sentence, and what the unvested equity is worth against a stale mark.

Ninety days — illustrative

Not the employer’s onboarding plan.

Days 1–30: run the stack in the environment they actually use. Measure one path.
Days 31–60: one latency or correctness fix with a number attached.
Days 61–90: a gateway failure you handled, written down.

A week you can rehearse

Sketch an order state machine with a partial fill and a disconnect.
Say what you would not put on the hot path.
Ask if the September band is still the band.

Ask them

Is the $179–226k figure still current, and what did the bonus pay last year?
What valuation is the equity grant using?
NYC only, and which team owns Aeron today?

Walk away if

The stack is a rewrite with no production traffic.
They quote the 2022 valuation as current.
The seat is research, not the order path.

Proof you can build before you apply

The state-machine lab, with a disconnect in the adversarial case.

Event indexer with reconciliationDrop the duplicate, net 45

The company you would actually join

Blockchain Lab analysis

Public reporting and the employer’s own releases. Not a relationship with Blockchain Lab. Not a credit opinion.

Founded: The chief executive and founder, in Reuters' account of the 2022 round, is Raghu Yarlagadda.
Base: New York City for this seat. The pay sentence is for the New York City area.
Status: Private. The last round this brief will cite is June 2022.
People: Raghu Yarlagadda, founder and CEO, is the executive on the Reuters story.

Institutional crypto prime brokerage is a spreadsheets-and-sockets business. The posting is unusually concrete for the industry: Aeron, SBE, FIX, an order state machine, Rust and Java, latency as a feature. Five years in trading systems is the bar. A general backend interview will waste everyone's afternoon. The cash band is one of the few on this desk that says USD and says where it applies.

The equity story is the opposite of concrete. The last mark a candidate can actually read is $8 billion in June 2022, more than double a $3.75 billion mark from the summer before, led by a sovereign fund in a drawdown. Yarlagadda said then that volatility was the point. He was right about the volatility. Whether the mark survived it is not something this brief will invent. Ask what a new option is struck at, and whether the 2022 preference stack still sits above common.

Founders

Raghu Yarlagadda

Founder and CEO

He told Reuters in June 2022 that the firm would use a volatile market to hire and to buy things, and that the next 12 to 18 months would be volatile. Those 18 months ended long ago. The valuation he was announcing has not been replaced, in this brief, by a later priced round.

What the company sells

Prime brokerage

The company's own problem statement: institutions want trading, credit, and structure, and the crypto market is fragmented. FalconX sells the bundle.

The stack this seat owns

Aeron, OMS/EMS, market-data pipelines, venue gateways, FIX and WebSocket, SBE schemas. Employer language, not a guess.

What it is not

Not a consumer app and not a protocol. If you want to design a token, this is the wrong req.

Capital

Last priced mark

$8 billion

June 2022. Stale on purpose until a later round is public.

That round

$150 million

Mixed primary and secondary, Reuters said, without a split.

Prior mark

$3.75 billion

August 2021.

This seat's base

$179k–$226k USD

New York City area. Expected when the post was generated. Bonus and equity extra.

Aug 2021
Series C, as later coverage described it
$210 million at $3.75 billion
Blockworks, reporting the next round, described an August 2021 raise of $210 million at $3.75 billion. Reuters described that prior mark as $3.75 billion without repeating every participant.
22 Jun 2022
Series D
$150 million at $8 billion
Reuters: led by GIC and B Capital. Not all of the $150 million was primary; some investors sold. New names included Thoma Bravo and Adams Street. Tiger Global and Wellington were already in. The mark is four years old.

What should change your mind

A 2022 valuation used as if it were a 2026 fact.
Secondary inside the last round. Primary capital and a seller's exit are different runway stories.
Trading-system incidents are customer-capital incidents. The on-call is the job.
New York City is the location attached to the band. Do not assume another office pays the same.

Ask them

What is the strike, and what happened to the $8 billion mark?
How much of the 2022 round was primary?
Is Aeron the production bus, or a migration?
Who carries the pager when a venue gateway wedges?

Sources

If a figure is not in those sources, it is not in this brief on purpose.

What the employer actually wrote

Employer stated. Senior trading-systems developer in New York: low-latency services on Aeron, OMS/EMS, market data, and venue gateways, in Rust and Java.

Build scalable services using Rust and Java, optimized for latency and throughput.
Responsible for development of low latency services on Aeron, including OMS/EMS components, market-data pipelines, and venue gateway connectivity.
Integrate with exchange APIs using FIX, REST, WebSocket, and venue-specific protocols.
Model complex order lifecycles, state machines, and execution workflows into resilient, observable, fault-tolerant services.
Design and maintain SBE message schemas and high-throughput message-bus communication on Aeron.

Source: the employer’s public Greenhouse record, job 4734064005. Open the original. First seen by this desk 2026-10-06. Nothing above the fold is a substitute for that page.

A reading of the work

Blockchain Lab analysis. These lines are a reading of the advertisement. They are not extra hiring requirements.

An order state machine that double-fills is the incident. Start there.
Aeron and SBE are the stack they named. Do not interview as a generic backend.
The 2022 valuation is not the offer. Ask what the equity is struck at now.

Still not disclosed

Anything the compensation line does not already quote. A printed band is the employer’s sentence for the place they named — not a Blockchain Lab estimate, and not a promise for every location on the posting.
Closing date, and the day the role was first published. The board timestamp is an update.
Visa sponsorship, the real on-call rota, and the employing subsidiary, unless the posting already named them.

Not a recommendation to apply. Not an employer assessment. Figures from public reporting move, and a database is not a filing. How this desk labels evidence. Report a listing.

FalconX · New York City, NY · pay employer-stated base: $179,000–$226,000 usd in the new york city area. the posting says that was the expected range when the post was generated, with bonus and equity outside it.

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