Senior Software Engineer - Java Fullstack

Interactive Brokers Group

Location: Mumbai, India
Job Type: full-time
Salary: Unknown
Posted: August 10, 2025

Job Description

Company Overview

Interactive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting-edge technology and client commitment.

IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.

Barron's has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi-national team and be a part of a company that simplifies and enhances financial opportunities using state-of-the-art technology.

Job Description and Responsibilities:

Interactive Brokers Software Service India ("IBSSI") is looking for Software engineers with a Java concentration and experience working in Unix/Linux environments to help make our customer-facing trading applications and back-end systems even better.

If you are proficient in developing front-end systems or corresponding back-end services for them, have solid programming experience, love the challenge of developing complex real-time solutions, and enjoy working in a dynamic environment with a strong team, then Interactive Brokers may be just the place for you. This job is heavily oriented toward designing, building and optimizing trading and back-office applications.

As an SSE, you'll join a team of highly talented and motivated engineers who are passionate about their work. Throughout this job, you'll design, test, deploy and maintain software solutions with complete ownership.

Research, conceive and develop technology solutions to extend and improve our client-facing and back-end applications.
Write client / server-side code for web-based applications, create robust high-volume production applications, and develop prototypes quickly.
Work closely with the engineering team based in other Interactive Brokers offices in Europe and the US.
Collaborate on scalability issues involving access to massive amounts of data.
Solve all problems that come your way.

Qualifications:

Minimum Qualifications

MCA/BE/BTech/MTech/ME degree in Computer Science or related technical field from a reputed institution.
5+ years of relevant work experience, including large systems software development experience or client application development.
4+ years of work experience on front-end frameworks like AngularJS, VueJS, etc.
Experience programming in Java 8 or later and Oracle/MySQL.
Experience in REST-based Microservices.
Strong analytical and problem-solving.
Sound Knowledge of SQL, relational databases, and other data storage
Experience working in Unix/Linux.
Fluency in English.

Preferred Qualifications

Proficient in 1 or more scripting languages like Unix.
Spring framework in general (Spring MVC).
1+ years of work experience in the Financial Services space (Brokerage / Capital Markets / Investment Banking / Financial Services).
A strong foundation in computer science, with strong competencies in data structures, algorithms, and software design
Ability to perform under pressure in time-critical situations using sound judgment and
Ability to integrate into and work well within a global
Be very close to technology and looking at a technology-centric career.

Company Benefits & Perks:

Competitive salary.
Performance-based annual bonus (cash and stocks).
Hybrid working model (3 days office/week).
Group Medical & Life.
Modern offices with free amenities & fully stocked
Monthly food card & company paid
Hardship/shift allowance with company-provided pickup & drop facility*
Attractive employee referral
Frequent company-sponsored team-building events and outings.

* Depending upon the shifts.
**The benefits package is subject to change at the management's discretion.

🎯 Who is this job for?

This role is ideal for a Senior Java Fullstack Engineer with 5+ years’ experience in large-scale system or client application development, strong skills in Java 8+, REST-based microservices, SQL, and front-end frameworks like AngularJS or VueJS. Candidates should be comfortable with Unix/Linux, data structures, algorithms, and building scalable, high-performance trading or financial systems. Best suited for someone who thrives in a fast-paced, global environment and enjoys full ownership of complex, real-time software solutions.

💬 Potential Interview Questions

Explain the key differences between Java 8 and later versions that are relevant to enterprise development.
Java 8 introduced lambda expressions, streams, and the new Date/Time API; later versions added features like var for local inference, switch expressions, records, and performance improvements useful in large-scale systems.
How would you design and implement a high-volume, low-latency REST-based microservice in Java?
Use Spring Boot with asynchronous request handling, efficient connection pooling, caching, and non-blocking I/O (e.g., WebFlux) while ensuring proper load testing and horizontal scaling.
Describe how you would optimize SQL queries in a high-traffic trading application.
Use proper indexing, avoid unnecessary joins, utilize query execution plans, and implement caching strategies while ensuring transactional integrity.
How do you handle concurrency and thread safety in Java applications?
Use synchronization mechanisms like synchronized, Lock, and concurrent collections; avoid shared mutable state; and consider non-blocking algorithms where possible.
Explain how AngularJS or VueJS can be integrated with a Java backend for real-time data updates.
Use REST APIs or WebSocket connections for push notifications, with JSON data binding on the front end and event-driven services on the backend.
What are some common performance bottlenecks in microservices, and how do you mitigate them?
Bottlenecks include slow database queries, network latency, and excessive serialization/deserialization; mitigation includes caching, async communication, and database optimization.
Describe the steps to troubleshoot a production issue in a distributed Java application running on Linux.
Check logs, use monitoring tools (e.g., Prometheus, Grafana), analyze system resource usage, inspect thread dumps, and identify failing services through tracing.
What is the role of the Spring MVC framework in building full-stack applications?
It handles HTTP request routing, integrates with view technologies, and works seamlessly with REST controllers to connect frontend clients to backend services.
How would you implement secure authentication and authorization in a Java-based financial services app?
Use Spring Security with OAuth2 or JWT tokens, enforce HTTPS, validate inputs, and implement role-based access controls.
Explain how you would ensure fault tolerance in a trading system’s backend services.
Use circuit breakers (e.g., Resilience4j), retry logic, replication, failover strategies, and message queues to handle transient failures gracefully.

📋 Job Summary

Join Interactive Brokers in Mumbai as a Senior Software Engineer (Java Fullstack) and help build high-performance trading and back-office applications used by clients in 200+ countries. You’ll work with Java 8+, REST-based microservices, AngularJS/VueJS, SQL, and Unix/Linux in a hybrid setup alongside global engineering teams. This role offers competitive pay, annual bonuses (cash & stock), and comprehensive benefits, plus the chance to solve complex real-time problems in a leading fintech firm ranked #1 online broker by Barron’s for six years running. If you thrive in fast-paced, tech-driven environments, this is your opportunity to make a global impact.