Broker / Exchange Execution & OMS Engineering
The order path, built to survive reality: broker and exchange adapters, an explicit order state machine, retries that do not duplicate, reconciliation that catches drift, and the latency observability to know which of those is failing.
Verified Solvex Specialist
Verified by SolvexDirect specialist contact for Solvex engagements
What this means. An authorized Solvex administrator registered and approved this exact public identity. What it does not. Solvex has not inspected the account on the platform, and this is not the platform's own verification.
Solvex specialists never ask for your passwords, recovery phrases, one-time codes, or payments to a personal account. Work, scope and invoices are agreed in writing through the official channels on this site.
What's covered
- Broker and exchange adapter design across REST, WebSocket and FIX where relevant
- Order state machine with every transition explicit and logged
- Idempotent submission, retry and cancellation handling
- Position and balance reconciliation against the venue of record
- Pre-trade risk gates enforced in the execution path, not around it
- Kill switches and safe-halt behaviour
- Latency measurement and execution-quality observability
- Immutable audit logging of every order lifecycle event
What you receive
- Execution and OMS source with adapter documentation
- Order state machine diagram and transition table
- Reconciliation design and drift-detection alerts
- Kill-switch and halt procedures
- Latency and execution-quality dashboards
- Operational runbook for live trading
Evidence and reporting
How the work is kept honest- Evidence, frozen at issuanceFindings tie to something observed. When the report is issued, the evidence behind it is frozen in the same transaction and cannot be edited afterwards.
- A signed reportAn Ed25519 signature covers both the report content and the delivered file. Alter a byte of either and verification fails.
- Written scope firstAdvisory work runs to a written scope agreed before it starts, so what you receive is what was agreed.
Anyone holding a Solvex report can verify it publicly without seeing its contents.
Our boundaries
What this engagement does not do, stated before it starts.
- We do not guarantee fill quality, latency figures or venue behaviour
- Exchange and broker outages, rate limits and rejections are outside our control
- No investment advice or strategy provision
- Venue API terms and rate limits remain your obligation to observe
How this engagement runs
- 01
Intake
Tell us the system, the goal and the constraints. If the work is not a good fit, we say so before anyone is invoiced.
- 02
Scope and authorization
Written scope and signed authorization before anything is touched. Security testing runs only against systems you own or are contractually entitled to have tested.
- 03
Investigation or build
Specialists matched to the work. Findings are proven by hand — scanner output is a lead, never a finding.
- 04
Evidence
Every finding ties to something observed. When a report is issued, its evidence is frozen in the same transaction, so what backed the report cannot change afterwards.
- 05
Delivery
A signed report: an Ed25519 signature over both the content and the file, with a short verification reference you can read down a phone.
- 06
Verification and retest
Anyone holding the report can verify it publicly without seeing its contents. Fixes are retested as part of the engagement — “fixed” means we confirmed it.
Questions we are asked
- Why does the order state machine matter so much?
- Because 'submitted' is not 'accepted', 'accepted' is not 'filled', and a cancel racing a fill is a state most systems handle by accident. Making every transition explicit is what lets you reconcile after a disconnect instead of guessing what you own.
- What breaks most often in live trading?
- Reconnection. The strategy is usually fine; the system loses its socket, misses the fill event, restarts believing it is flat, and re-enters a position it already has. Idempotent submission and startup reconciliation prevent an entire family of expensive incidents.
- Do you support FIX?
- Where the venue offers it and it earns its complexity. For most retail and mid-tier venues a well-built REST plus WebSocket adapter is more maintainable and no slower in any way that matters at your latency budget.
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