Senior Software Engineer

Mojo · New York

FULL TIME

Job Description

About Mojo

Mojo is a team of highly talented people with deep backgrounds in trading, engineering, data science, and sports, including people from top market makers, big tech, sportsbooks, and professional teams. We build systems that price outcomes, make markets, and trade across prediction markets and sportsbooks. The systems we run are real-time, high-volume, and directly tied to company P&L.

About the Role

We’re looking for a Senior Software Engineer with deep expertise in core backend electronic trading technology, including low latency design, real-time market data processing, and related trading infrastructure. You will help define and evolve the technical architecture that powers our real-time pricing and trading system. This role is deeply hands-on and ideal for an engineer who thrives on fast, objective feedback from real-time markets - where system correctness and performance are continuously measured.

What You’ll Do

Write high-performance, low-latency, reliable, and scalable code in C++ and/or Java

Define and build the architecture of the systems that power our real-time trading, pricing, and financial data platforms

Lead complex, multi-team initiatives that shape the technical direction of the company

Collaborate to make long-term architectural decisions around scalability, fault tolerance, reliability, and system design across the platform

Identify, assess, and address complex, cross-cutting technical challenges, simplifying and aligning systems and technical strategy at an organizational level

Partner with product, data science, trading and other engineering staff to ensure our technical strategy supports the broader business vision

Mentor staff engineers, guide architectural reviews, and help grow the engineering team’s technical capabilities

Participate in our on-call rotation (~1 week every 13 weeks, with 24-hour coverage) and help improve systems, processes, and reliability across the platform

What We’re Looking For

At least ten years of experience with C++ and/or Java

Expertise designing and building large-scale, distributed backend systems in real-time or high-throughput environments in quantitative electronic trading

Proven experience implementing low-latency trading systems at a leading bank, brokerage, hedge fund, or exchange

Deep familiarity with financial exchanges, trading systems, prediction markets, or crypto exchanges, including Financial Information eXchange (FIX) protocol, order lifecycle, request for quote (RFQ) workflow, quantitative analytics, and market data processing

Expert-level understanding of distributed systems architecture, data models, consistency, fault tolerance, and systems performance

Proven ability to define long-term architectural direction and lead complex, cross-organizational technical initiatives

Excellent communication skills, with the ability to influence technical strategy and collaborate effectively with engineering and product leadership

Experience with public cloud technologies (e.g. AWS, GCP, Azure)

Experience with AI/agentic software development

Benefits

We’re excited to offer the following benefits to our employees

Competitive total compensation package including base salary, profit share and equity

Generous benefit package, including: medical, vision and dental insurance, OneMedical membership

Company-funded Health Savings Account with enrollment in high-deductible healthcare plan

401(k) retirement plan available to contribute on Day 1

Company-paid life insurance

Generous parental leave

Unlimited PTO

Base Salary Range: $200,000 - $230,000

At Mojo, we are committed to creating a diverse environment and are proud to be an equal opportunity employer. We welcome applications from all backgrounds and don’t discriminate on the basis of race, religion, color, sex, pregnancy, national origin, veteran status, or disability status.

Company	Mojo
Location	New York
Type	FULL TIME
Niche	Software and applications developers and analysts

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