Stock trading app development

Introduction

TradeSwift Technologies is a UK-based fintech company specialising in mobile trading solutions for retail investors across Europe and Asia. They saw increasing demand from younger investors for a modern, user-friendly stock trading application that would combine real-time order execution, simplified UX, and rich analytics — while avoiding the heavy licensing costs and rigidity of legacy brokerage platforms. They partnered with Top Remotely to customise and deploy a full-featured stock-trading app that would support their business model, scale to multiple markets, and deliver robust performance without vendor lock-in.

Challenges

Before engaging Top Remotely, TradeSwift was facing:

Dependence on spreadsheets and manual workflows for order-management, risk tracking and client onboarding.
Legacy system integration issues: the brokerage backend was inflexible, costly and did not support new mobile-first UI.
Lack of real-time visibility into trades, order status, and client behaviours — resulting in delays, poor user experience and higher churn.

Inability to adapt quickly to new regulatory markets (e.g., adding Asian market access) because of rigid architecture and lack of modularity.

Objectives

Top Remotely was engaged by TradeSwift with the following key goals:

Build and deploy a centralized mobile/web platform to unify trading (stocks, ETFs), user onboarding, risk monitoring and analytics.
Enable real-time tracking of orders, executions, portfolio holdings, P&L and alerts for both users and administrators.
Improve forecasting of trade flows, reduce manual entry (spreadsheet elimination) and eliminate duplicate data between front-end, backend and risk systems.

Keep total cost of ownership (TCO) low while ensuring scalability (both in user base and new market add-ons) and customisability (future features, new asset classes).

Solutions

Top Remotely delivered a full-featured trading platform, custom-configured and integrated for TradeSwift’s operations:

Order Management & Execution Module: Multi-market support (UK, EU, Asia), with real-time market data feeds, order types (market, limit, stop), and settlement tracking.
Portfolio & Analytics Module: Live holdings dashboards, P&L, trade history, watchlists, alerts for price movements and margin triggers.
User Onboarding & KYC Module: Built-in digital KYC onboarding workflow customised for UK/EU regulatory requirements, with API integration to third-party identity verification providers.
Back-Office & Risk Module: Real-time risk monitoring (e.g., user exposures, margin usage), admin dashboards with alerts and reporting.
Mobile + Web Front-end: Native iOS/Android apps and responsive web portal for desktop users, with streamlined user experience tailored for new-age retail investors.
Deployment Process: Cloud-native architecture using micro-services (AWS), containerised deployment supporting scale. API-first design to enable future asset-classes (crypto, derivatives) if needed.
Integration & Security: Integration with market data feeds, trade-execution brokers, third-party KYC and payment providers. Security architecture with TLS, encryption at rest, role-based access, audit logs and vulnerability scanning.

Deployment Process

We executed the project via a phased, agile rollout:

Initial Assessment: Mapped TradeSwift’s business processes (onboarding, order flow, settlement, risk monitoring) and defined module scope.
Data Migration & Integration: Migrated user data, historical trades and portfolio holdings from legacy spreadsheets/CSV into the new system. Established broker/exchange feed integrations.
Customization & Development: Developed custom workflows (e.g., risk alert triggering), print/export formats (user statements, regulatory reports), and mobile-UI customisation.
Training & Roll-out: Provided role-based onboarding for trading desk, risk team, customer service and end-users (via web/mobile). Piloted with a closed user group for 4 weeks, then full launch.
Go-Live & Support: After launch, provided 24/7 support for first 30 days, bug-fixes and performance optimisation. Established monitoring/tracking dashboards for user behaviour, execution latency and system errors.

Results

Following full deployment of the trading platform (customised by Top Remotely for TradeSwift):

Order-to-execution latency reduced by ~40% (from ~500ms to ~300ms average).
~60% reduction in manual spreadsheet use and duplicate data entry across systems.
~30% increase in new user onboarding per month (due to streamlined mobile UX and digital KYC).
Go-live of new market access (Asian equities) achieved in 6 weeks rather than the expected 12 weeks.
TCO (cost of ownership, including licences, infrastructure and support) ~50% lower compared to previously evaluated commercial trading platform alternatives.

Technology Stack

Backend: Python (Django/Flask micro-services)
Frontend: React (Web), Swift (iOS), Kotlin (Android)
Database: PostgreSQL + Redis caching
Hosting: AWS (EKS, RDS)
Integration: REST APIs, Webhooks
Modules: Order execution, portfolio analytics, onboarding/KYC, risk monitoring

The collaboration between Top Remotely and TradeSwift demonstrates how a modern, agile fintech SME can move from legacy, siloed systems to a unified, high-performance trading platform — without excessive license costs or vendor lock-in. Through smart architecture, modular design and lean deployment, TradeSwift is now positioned for rapid growth, easier market expansion and competitive differentiation in the retail trading space.