Senior Backend Engineer - Fintech, Hybrid, High-Impact

LaSalle Network; Oak Brook (IL); Hybrid; USD 140,000 - 150,000; Full time

Benefits offered by this job

Hybrid onsite model

Medical, dental, vision coverage

Job summary

LaSalle Network is seeking a Senior Software Engineer to join a growing fintech team responsible for mission-critical transaction and trading systems. You will design, develop, and enhance highly available backend platforms supporting complex business processes in a fast-paced financial environment.

The ideal candidate has 8+ years of software engineering experience, deep expertise in Java, REST/gRPC APIs, and distributed systems, and thrives on building scalable solutions.

Qualifications

• 8+ years of software engineering experience.
• Experience building backend APIs and distributed systems.
• Strong problem-solving and communication skills.
• Ability to operate in business-critical environments.

Responsibilities

• Design and develop backend services using Java.
• Build and maintain REST and gRPC APIs.
• Support high-performance transaction-processing systems.
• Collaborate with product managers and engineering teams to design scalable solutions.
• Contribute across the full software development lifecycle.
• Participate in architecture, design, testing, deployment, and maintenance efforts.
• Improve reliability, scalability, and performance of existing systems.
• Support integration and data-processing workflows.

Skills

Backend API design

Distributed systems

Java

Problem solving

Communication

Business-critical operations

Tools

Java

REST APIs

gRPC

TypeScript

Job description

LaSalle Network is seeking a Senior Software Engineer to join a growing fintech team responsible for mission-critical transaction and trading systems. You will design, develop, and enhance highly available backend platforms supporting complex business processes in a fast-paced financial environment.

The ideal candidate has 8+ years of software engineering experience, deep expertise in Java, REST/gRPC APIs, and distributed systems, and thrives on building scalable solutions.