Services / Custom Development

Trading technology built to your spec, faster and at lower cost than you expect.

Custom software for brokers, prop firms, exchanges, and hedge funds — built on a proven, reusable codebase covering order execution, risk management, liquidity connectivity, client portals, and more. Your budget goes toward what makes you different, not recreating infrastructure that already exists.

Capabilities

Built for every corner of the trading and capital markets stack.

From execution infrastructure to investor-facing platforms — we build the software that runs trading businesses, whether you're an FX broker, a prop firm, a crypto exchange, or a systematic hedge fund.

Platforms

Trading platform development & extensions

Custom features, order types, risk overlays, and workflow automation built on Spencer Trader — or integrated with your existing platform of choice. From white-label configurations to proprietary UI layers, built to your exact trading model.

Execution & connectivity

Order routing, FIX & liquidity integration

Custom execution logic, smart order routing, and liquidity provider connectivity via FIX, REST, or WebSocket. Whether you're connecting to prime brokers, ECNs, or crypto venues — we build the plumbing that handles real money at low latency.

Risk & operations

Risk management & back-office systems

Real-time position monitoring, automated hedging logic, A/B-book routing, and back-office administration tools — built to your risk framework, not constrained by the defaults of an off-the-shelf system.

Prop & fund technology

Prop firm, PAMM & MAM platforms

End-to-end prop firm infrastructure (challenge platforms, evaluation engines, funded account systems) and multi-account management systems with custom allocation logic, performance-fee calculation, and investor reporting — built for your model, not adapted from someone else's.

Exchange technology

Exchange & matching engine integrations

Custom extensions to Spencer Exchange, plus integrations between exchange infrastructure and brokerage or custody systems. Market-maker tooling, settlement workflow automation, and custom connectivity to institutional clearing and settlement networks.

Client-facing

Client portals, CRM & onboarding systems

Branded client portals, trader dashboards, KYC/onboarding flows, and CRM integrations — connected to your trading infrastructure and built to your compliance and UX requirements. Not a template. Not a SaaS wrapper. Purpose-built for your business.

The core advantage

You don't pay to build the foundation.

Most trading technology projects start from zero. Every execution component, every risk engine, every liquidity connector, every onboarding flow — rebuilt fresh. And you pay for every hour of that work, whether it's the tenth time that component has been built in the industry or not.

Spencer Logic has spent years building, testing, and running that foundation across live trading environments. When you engage us for custom development, we start from production-hardened components. Your budget goes toward what makes your business distinct — not recreating infrastructure that already exists and works.

This is a structural cost and speed advantage. It compounds across every project we deliver, because each engagement improves the shared base that the next one starts from.

Starting from scratch

Build execution and order management layer
Design and test liquidity connectivity
Implement risk and position management logic
Learn platform API edge cases through trial
Build staging and testing environment
Write integration and ops documentation

With Spencer Logic

Start from production-proven execution components
Extend existing, tested connectivity layer
Configure battle-tested risk modules
Apply 20+ years of trading platform knowledge
Staging environment already established
Documentation inherited from codebase base

Project examples

The kinds of problems we solve.

Every firm has different requirements. Here are representative projects across the capital markets stack — what was built, and what it delivered.

FX / CFD Broker

Multi-tier IB commission engine

Custom commission-calculation system handling multi-level introducing broker structures with currency conversion, rebate schedules, and automated reporting. Replaced a manual reconciliation process that previously took 3 days per month.

Fixed Income / Derivatives

Interest Rate Swap trading platform with CLOB

Full-stack IRS trading platform built around a Central Limit Order Book — covering order entry, matching engine integration, position management, and real-time risk exposure across swap tenors. Delivered for an institutional client requiring sub-millisecond matching and full audit trail for regulatory reporting.

Hedge Fund

Automated execution & risk routing

Real-time position monitoring and dynamic order routing logic that classifies flow and executes based on configurable risk parameters — removing manual intervention from the execution workflow. Dealer workload reduced by over 60%.

Asset Manager

Custom PAMM performance-fee engine

Bespoke performance-fee calculation with high-watermark logic, multi-currency support, and automated investor statements built on the Invest Social platform. Onboarded 40+ fund managers in the first month post-launch.

Crypto Exchange

Institutional connectivity & settlement workflow

Custom API layer connecting Spencer Exchange to a prime broker and two custodians — automated settlement reconciliation, position netting, and end-of-day reporting. Settlement exceptions reduced by 90% in the first quarter.

Fintech / Broker

KYC, onboarding & account automation

End-to-end onboarding flow connecting a KYC provider, CRM, payment gateway, and trading platform — automated account creation, leverage tiering, and compliance-triggered group migrations. Onboarding time cut from 48 hours to under 10 minutes.

Our process

From discovery to deployment.

A structured engagement model that keeps projects on time, on budget, and aligned with your business requirements throughout.

1

Discovery & requirements

We map your business logic, existing infrastructure, and integration requirements into a signed technical specification. This locks scope before a line of code is written.

Typical: 3–5 days
2

Architecture & codebase match

Our team identifies which components of the Spencer Logic codebase apply to your project, what needs custom extension, and what needs building from scratch. You get a clear breakdown of effort and cost before work begins.

Typical: 2–3 days
3

Build & staged review

Development proceeds in sprints with staged releases to a dedicated testing environment. You review working functionality at each milestone — not mockups at the end.

Typical: 2–8 weeks
4

Production deployment & handover

Deployment during a scheduled maintenance window with a rollback plan in place. Full documentation and operational runbook provided. Ongoing support available independently.

Typical: 1–2 days

Engagement models

Flexible to your needs.

We work on fixed-scope projects, retainer arrangements, and hybrid engagements depending on how your requirements are defined and how your team works.

Fixed-scope project

Best for well-defined requirements and one-time builds. Fixed timeline, fixed price. Technical specification signed before work begins — no scope creep, no surprises.

Development retainer

Best for ongoing development needs, evolving requirements, or firms that want a dedicated engineering resource without hiring in-house. A set monthly commitment with predictable cost and consistent team access.

Advisory & architecture

For firms that have their own engineering team but want access to Spencer Logic's domain expertise for architecture review, technology selection, or strategic platform decisions. Engagement-based, no long-term commitment required.

Technology

Infrastructure-grade technology for trading and capital markets.

Every technology choice is made for performance, reliability, and the specific demands of live trading environments — from microsecond execution to institutional-scale data flows.

Platform

Spencer Trader

Platform

Invest Social

Platform

Spencer Exchange

Platform

Client & Broker Portals

Execution platform

MetaTrader 4 & 5

Connectivity

FIX Protocol

API

REST / WebSocket

Infrastructure

Equinix LD4 / NY4