This role is only open to English-speaking candidates from the Latino Regions ($1000 USD - $1500 USD).
We are looking for a mid-to-senior Java developer with FIX API experience to help us integrate FIX API connections for broker platforms such as Interactive Brokers and Lime. You'll play a critical role in developing our live trading infrastructure, which supports low-latency, high-frequency executions at scale.
This is an external role with immediate availability.
You are a good fit if you have experience with:
Backend (Languages & Frameworks):
- Java – Spring Boot, Jakarta EE (Core requirement)
- Experience with FIX protocol integration using QuickFIX/J (A must-have)
- Basic Python proficiency – Able to read and collaborate on ML components written in Python (Core requirement)
Trading Systems & APIs:
- Experience with financial APIs or trading systems (Core requirement)
- Familiarity with order management systems (OMS) is a plus
- Understanding of low-latency or high-frequency architecture (bonus)
Databases:
- PostgreSQL or MySQL (Core requirement)
- Redis or NoSQL systems (bonus)
Tools & Others:
- Git (Version Control)
- RESTful API Design and Integration
- Docker (for containerized backend services)
- WebSocket communication (for real-time signal processing)
- Agile/Scrum methodologies
Responsibilities:
- Integrate broker APIs using FIX protocol, especially QuickFIX/J
- Develop high-performance, low-latency backend components for live trade execution
- Build backend support for a proprietary Order Management System (OMS)
- Process real-time trading signals received via webhook and WebSocket
- Write clean, testable Java code for backend services
- Collaborate with Python/ML teams to integrate AI-generated trading strategies
- Participate in infrastructure decisions and code reviews
- Monitor and improve backend system performance, especially for HFT simulation
Certificate
Candidates who pass our technical assessment and interview process may receive a certificate recognizing their proficiency in Java Development. This certificate can be showcased on LinkedIn to validate your expertise.
Bonus Points:
- Prior experience with QuickFIX/J
- Experience in financial trading systems or fintech platforms
Tags:
[Java, Spring Boot, Jakarta EE, FIX API, QuickFIX, Python, Trading Systems, Low Latency, Git, REST API, PostgreSQL, Redis, WebSockets, Backend, OMS, HFT, Remote, Mid Level, Senior Level]
Job Type: Contract
Education:
- Bachelor's (Required)
Experience:
- Java: 2 years (Required)
- Fix Api: 2 years (Required)
- Financial APIs or trading systems : 2 years (Required)
Language:
- English (Required)
Location:
- Buenos Aires, Buenos Aires (Required)