Sr Software Engineer; Hybrid Bolingbrook, IL

About Us

S&S Activewear is a leading North American, tech enabled specialty distributor of imprintable apparel, including t shirts, fleece, athletic wear, headwear, workwear, scrubs and accessories. We pride ourselves on being the “critical link” that enables our 100+ brand partners such as Adidas, Columbia and Gildan to reach our hyper fragmented base of customers, comprised of apparel decorators, eRetailers and promotional products distributors that embellish apparel items for diverse end consumer use cases (e.g., everyday wear, concerts, fitness attire, life events, team sports, etc.).

At S&S, we differentiate in the market through a customer service focus, strategic product portfolio, world class distribution infrastructure, a collaborative growth culture and a relentless focus on technology and innovation.

We continue to strive to be the apparel distributor of choice by inspiring and fostering growth for customers, employees and suppliers, anchored in our commitment to Lead with Respect, Never Settle, Own the Outcome, Win Together, and the belief that Innovation Powers Our Hustle
. These values guide how we serve, how we collaborate and how we continuously improve, ensuring we deliver on our promise of service, deep relationships, innovation, continuous improvement and accountability.

S&S Activewear, the leading nationwide distribution company in the apparel and fashion industry, is seeking a highly skilled Sr Software Engineer to join our growing Software Engineering Team to help build and evolve our highly transactional eCommerce platforms and core business systems. In this role, you will design, develop, and enhance scalable, high-performance applications and APIs using C# and modern .NET

technologies. You’ll play a critical part in powering our ordering systems, integrations, and customer‑facing solutions, working across a modern UI stack and collaborating closely with product, UX, and business stakeholders. You’ll contribute to business‑critical initiatives with real customer impact, while innovating on a fully in‑house developed web platform and ERP system. Our teams operate in a fully agile, product‑driven environment that encourages ownership, technical influence, architectural improvement, and the delivery of high‑quality solutions at scale.

Monday‑Friday 8AM‑5PM, Full‑Time, Exempt. Hybrid Schedule Available – 220 Remington Blvd, Bolingbrook, IL.

$ – $ annually, plus STI.

We offer a comprehensive benefits package designed to support your life, health and future. Benefits begin 0–90 days after hire and include Vacation, Personal and Sick time;
Medical, Dental, Vision, Life Insurance and Disability coverage;
Flexible Spending Accounts; and a 401(k) plan. You’ll also enjoy discounts on brand‑name apparel, fun employee events, and meaningful opportunities for growth and advancement. Join a company that invests in you from day one.

• 20% maintenance and 80% new development
• Design, build, and maintain web applications using C#, .NET, and Razor/Blazor.
• Develop and optimize RESTful APIs to support integrations with e‑commerce platforms, customer systems, and internal applications.
• Collaborate with cross‑functional teams to translate business needs into technical solutions.
• Proactively test and optimize applications to eliminate defects, improve performance and ensure a smooth user experience. Ensure code quality through best practices, testing, and peer reviews.
• Optimize application performance, reliability, and scalability through code optimization, caching strategies, and other techniques.
• Troubleshoot, debug, and maintain existing applications to ensure reliability and performance.
• Mentor junior developers and contribute to architectural decisions.

• 5+ years of professional experience with C# and .NET (Core or later).
• Hands‑on experience with UI frameworks (React, Angular, Vue, Blazor, or other similar technologies).
• Strong hands‑on experience with modern JavaScript and CSS, including building responsive, maintainable user interfaces and optimizing client‑side performance.
• Experience using…