Reactive Markets
FIX Onboarding & Client Services
Part remote, part office, you need to live within commuting distance of a named location.
Hybrid · Hybrid, London
Employer listed it 8 weeks ago · Added today
Been open since 8 weeks ago. Long-running listings are sometimes left up after the role is filled.
Salary
Not stated
Location
Hybrid · Hybrid, London
Timezone
Not stated
Contract
Full-time
Experience
Mid
Category
Sales
This employer didn't state pay. Jobs like this usually pay around $105k–$220k a year, a typical range taken from 587 mid-level sales roles on Nomaders that do state pay. It's a guide, not an offer.
Remote flexibility
Hybrid
This role is only partly remote, the employer expects time in the office around Hybrid, London, Hybrid, so you need to live within commuting distance.
What the employer says
- Source listing states candidate location: "Hybrid, London, Hybrid"
- Listing mentions "Hybrid"
What Nomaders makes of it
- Not suitable if you plan to move between countries
The quotes above are the employer's own words; the reading is ours. Always check the original listing and employment terms before working from another country.
About the role
FIX Onboarding & Client Services, EMEA
Hybrid, London, UK (3+ days per week in-office) | Full-Time
About Us
Reactive Markets is the 2026 OTC Trading Platform of the Year ( Risk.net ). Our network handles billions in daily trading volumes across FX, Equities, and Cryptocurrency, connecting 35+ of the world's leading liquidity providers.
We build trading systems that operate at the edge of what's technically possible — where nanoseconds matter and a dropped message costs real money. Our engineering team is small, senior, and deeply invested in the craft of building reliable, high-performance systems.
The Role
We are seeking a motivated and technically skilled Onboarding and Client Services professional to join our London team. This role will focus on FIX client onboarding, integrations, and client service delivery across FX, equities and digital assets. The successful candidate will work closely with clients and internal teams to ensure seamless connectivity, smooth integration, and exceptional service throughout the client lifecycle.
What You’ll Work On
FIX Onboarding & Integrations
Lead and manage FIX client onboarding projects — from initial requirements gathering through certification and production go-live.
Configure, test, and validate FIX sessions, including order routing, execution reporting, and market data flows.
Coordinate conformance testing and certification with clients to ensure compliance with platform standards.
Document onboarding procedures, client configurations, and integration best practices.
Leverage internal AI and automation tools to streamline client onboarding and troubleshooting
Collaborate with engineering and product teams to support new FIX workflows, APIs, and client integration initiatives.
Client Services
Serve as a frontline technical support for clients in EMEA across FX and equities business lines.
Build and maintain strong client relationships, ensuring timely and transparent communication addressing their needs and queries with professionalism and efficiency.
Provide ongoing technical and operational support for production trading environments.
Manage client inquiries, troubleshoot workflow or configuration issues, and coordinate resolutions across internal teams.
Partner with account management, sales and product teams to ensure a positive client experience and successful delivery of platform enhancements.
What We Need
3+ years of experience in a client onboarding, integration, or technical support role within a financial technology, trading, or brokerage environment.
Strong working knowledge of the FIX protocol — message structures, session management, and common trading workflows — with the ability to actually explain why a given configuration or workflow serves the client's business outcome, not just execute it.
Requirements
The employer hasn't listed requirements separately, they're described in the role summary above and on the original listing.
Benefits
No benefits package published with this listing. Ask about it at first interview.
How to apply
- 1Check the flexibility label above, hybrid, matches where you plan to live and work.
- 2Tailor your CV to the role at Reactive Markets, mentioning your remote working experience.
- 3Apply directly on the employer's careers page using the button below. Nomaders never handles your application.
Found 15h ago. Last checked today. Always confirm the details on the original posting, salary and location can change after publication.
Listing sourced from Company boards.
Similar roles
Other open sales roles with comparable remote rules.
Free to apply, no account needed.
Typically $105k to $220k per year · You'll be taken to the employer's careers page.