Lead Mobile Trading App Developer

Hermitage Infotech; Piscataway Township (NJ); On-site; USD 140,000 - 190,000; Full time

Job summary

Hermitage Infotech is seeking an experienced Lead Mobile Trading App Developer to design, develop, and maintain real-time trading and risk management mobile apps. You will own frontend architecture and drive component design across teams.

The ideal candidate has 5+ years in financial services software, deep React/TypeScript skills, and proven experience linking frontend with KDB/q and Java backends via REST and WebSocket APIs. UI testing with Playwright/Selenium is required.

Qualifications

• Bachelor's degree in computer science, software engineering or related field.
• 5+ years of software development in financial services front-office trading or risk management.
• Experience collaborating with tech and business teams in fast-paced environments.
• Expert level in ReactJS and proficiency in TypeScript/JavaScript, Node.js, HTML5/CSS3.
• Experience integrating frontend with backend in KDB/q and Java; REST APIs and WebSockets.
• Experience automated UI testing with Playwright or Selenium.

Responsibilities

• Design, develop, and maintain mission-critical real-time trading and risk management mobile apps.
• Lead frontend architecture and component design patterns in a dynamic team.
• Collaborate with technology and business teams to translate requirements into robust UI.
• Implement automated UI tests using Playwright or Selenium.

Skills

ReactJS

TypeScript/JavaScript

Node.js

HTML5/CSS3

Browser APIs

React architecture

State management

REST APIs / WebSocket

Education

Bachelor's degree in Computer Science/Software Engineering or related field

Tools

KDB/q

Java

Playwright

Selenium

Job description

We are seeking an experienced LeadMobile Trading App Developer to design, develop, and maintain mission-critical, real-time Trading and Risk Management Mobile applications.

Required

• Bachelor's degree in Computer Science, Software Engineering, or a related technical field.
• 5+ years of experience developing software within the financial services industry, preferably in front-office trading or risk management environments.
• Experience working in a dynamic, fast-paced environment with close interaction between technology and business teams.
• Expert-level proficiency in:
• ReactJS
• TypeScript / JavaScript
• Node.js
• HTML5 / CSS3
• Browser APIs
• Deep understanding of React architecture, component design patterns, state management, and modern JavaScript design patterns.
• Experience integrating frontend applications with backend systems written in KDB/q and Java, including development and debugging of REST APIs and WebSocket communications.
• Experience implementing automated UI testing using frameworks such as Playwright or Selenium.