Senior Software Engineer II - JAVA

AboutNetchex

We’reNetchex- the fastest growing Payroll, Human Resource, Time and Attendance, and Benefits services company in America. We give HR professionals time to work on what drives their businessesforwardby providing efficient tools and quality personal service. We tackle big challenges, take pride in our work, and learn early and often so we can delight our clients with solutions that solve their problems every day.

Job Overview

As a Senior Backend Engineer, you will take ownership of designing and delivering scalable backend systems that power our platform. You’ll work closely with cross‑functional teams to build high‑quality services using Java, while driving clarity in technical and architectural decisions. This role is ideal for engineers who enjoy solving complex problems and building performant systems.

Key Responsibilities

• Take ownership of designing, developing, and delivering complex backend features and systems with minimal guidance.
• Translate high‑level requirements into robust Low‑Level Designs (LLD) and drive clarity in technical decisions across modules.
• Lead development of critical features end‑to‑end—from design and coding to deployment, observability, and monitoring.
• Build, improve, and maintain high‑quality, scalable, and performant services using Java and Spring (or equivalent frameworks).
• Collaborate with Product Managers, Front‑end Engineers, ML Engineers, and QA Engineers to plan, align, and deliver cross‑functional initiatives.
• Mentor junior engineers (SDE1/SDE2) through code reviews, design sessions, and technical guidance.
• Proactively identify architectural gaps, propose technical improvements, and drive medium‑to large‑scale refactoring initiatives.
• Maintain strong engineering hygiene through documentation, design reviews, coding standards, and automation.
• Drive a culture of quality by ensuring high test coverage, robust automation, and reliable deployments.
• Participate in on‑call rotations as a dependable owner of production services—diagnosing, resolving, and preventing incidents.

What We’re Looking For:

• 5+ years of experience building and scaling backend systems in Java, Spring, or similar ecosystems.
• Deep understanding of object‑oriented design , system design , data structures , algorithms , and complexity analysis.
• Strong experience designing and implementing RESTful APIs , backend microservices, and distributed systems.
• Hands‑on experience with databases(SQL + NoSQL), including schema design, query optimization, and debugging performance issues.
• Working knowledge of caching, message queues, async processing, and distributed system fundamentals.
• Ability to break down ambiguous problems, define architecture, and execute with significant autonomy.
• Experience building high‑ly available and scalable systems , with a strong understanding of performance tuning and optimization.
• Ability to mentor team members, influence decisions, and elevate the team’s technical bar.
• Excellent debugging skills and comfort working with observability tools.
• Strong communication and collaboration skills.
• Experience with fintech or payment systems, such as payment rails, financial APIs, reconciliation workflows, or ledger‑like data models is a plus.
• Experience with .NET‑based systems or services is a plus

Why JoinNetchex?

• Innovative Environment:Dynamic andcutting‑edgeHR and payroll technology.
• Career Growth:Numerous opportunities for advancement and skill enhancement.
• Collaborative Culture:Supportive team valuing creativity and teamwork.
• Impactful Work:Directly improve business success and employee experiences.
• Cutting‑EdgeTools:Work with the latest technology to drive growth and efficiency