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Junior Sr It Engineer in Chicago

4 active opportunities · Updated for October 2026

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Explore current junior sr it engineer jobs in Chicago. Use filters to narrow by work mode, employment type, experience and date posted.

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Flexport
📍 Chicago• $83.6K – $104.5K/yr
17 days ago

About Flexport: At Flexport, we believe global trade can move the human race forward. That’s why it’s our mission to make global commerce so easy there will be more of it. We’re shaping the future of a $10T industry with solutions powered by innovative technology and exceptional people. Today, companies of all sizes—from emerging brands to Fortune 500s—use Flexport technology to move more than $19B of merchandise across 112 countries a year. The recent global supply chain crisis has put Flexport center stage as we continue to play a pivotal role in how goods move around the world. We are proud to have the support of the best investors in the game who believe in our mission, solutions and people. Ready to tackle global challenges that impact business, society, and the environment? Come join us. The Opportunity Flexport.org is the humanitarian arm of Flexport. We serve nonprofits, NGOs, and mission-driven organizations that need to move impactful cargo reliably, often into some of the hardest environments to reach. As humanitarian and development needs keep climbing, the supply chain expertise our partners can count on matters more than ever. You'll own some of Flexport.org's most complex and highest-impact partner relationships. Your accounts span multiple shipping modes and trade lanes: ocean, air, trucking, and customs, and demand real supply chain fluency to navigate well. You won't just manage these relationships, you'll shape them. You bring a strategic point of view to every partner engagement, lead business reviews that drive real decisions, and connect the dots across Flexport's full product suite to help partners do more with what they have. You'll operate with full autonomy, hold a high bar on program growth and retention, and become someone junior teammates turn to for guidance. You Will Own end-to-end success for a portfolio of complex, multi-modal Flexport.org partner accounts, including partners with significant program growth potential and

aisupply chainlogistics
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Company: tastytrade Role: Software Engineer (Ruby) Location: Chicago, IL — Hybrid Salary: $130,000-$150,000 As a Software Engineer you will be part of a team that builds out the technology powering our retail brokerage business and supporting our other business initiatives. We care about the speed and stability of our back-end systems as much as we care about the customer-facing applications we build. Our architecture is distributed and consistently evolving as our business grows and we face different technical challenges, but always with a focus on practicality and performance. You'll help by modifying existing systems, taking ownership of current systems as well as green field projects, and troubleshooting issues as they arise. Our engineers work with a plethora of tools including Java, Javascript, and Ruby. You'll work primarily in Ruby but will have opportunities to expand your skill set into areas where your interests and our technology intersect. Ruby doesn't have to be your primary language today. If you're strong in another object-oriented language — Java, for example — and you're genuinely keen to make Ruby your day-to-day, we'd like to hear from you. Our technical interview is conducted in Ruby wherever possible, so you'd need to be comfortable enough to code in it by the time we meet. What You'll Do Work in multiple languages across different parts of the tastytrade stack and/or front-end trading client applications. Design, build and maintain services in a distributed architecture, thinking about failure modes, latency and data consistency as you go. Provide guidance and leadership to more junior members of the team when questions arise about language or implementation specifics, and contribute in a meaningful way to our peer review process. Translate requirements and technical direction into production-quality code with lightweight guidance from a senior engin

javascriptjavafinance
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Company Name: tastytrade Role: Staff Software Engineer, Order Handling and Ledger Team Location: Chicago, IL - Hybrid (3 days/week in office) About the Role : The tasty family of companies empowers individual investors and traders by providing educational media, intuitive and powerful trading software, high-speed order execution, competitive pricing, and innovative financial products. The diversity of our offerings and the technology that powers them give our engineers exposure to a broad set of tools and the opportunity to dig deep into specific problems. We are an ideal environment for engineers who are self-motivated, pragmatic, and genuinely enjoy creating and operating large, highly available, performant systems. Our team is lean, and our management philosophy values the autonomy of our people. At tastytrade, you'll be part of the team that builds our retail brokerage business. We care about the speed and stability of our backend systems. Our architecture evolves continually as the business grows and new technical challenges emerge, always with a focus on practicality and performance. What You'll Do : Design, build, and own the backend systems behind our order handling, ledger, and settlement flows Partner with product to scope features, build implementation plans, and oversee execution in collaboration with cross-functional teams Provide technical leadership across the team, both by leading project teams and by mentoring more junior engineers Deliver concise, constructive, and thoughtful code reviews covering design and quality, business-domain correctness, stability, and performance Monitor the external technology landscape and experiment with new tools to solve hard problems or improve the quality of existing solutions Define engineering-wide standards and guidance, and be the person colleagues across the organization seek out for critical work and decisions &nbs

postgresqlaifinance
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Reddit
📍 Chicago• $190.8K – $267.1K/yr
3mo ago

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com . We are looking for a Senior Engineer to deepen our team's knowledge in ingestion, processing, storage, and distribution of media at global scale. You’ll help us build, operate, and scale the media platform that powers Reddit for hundreds of millions of users around the world. As a Senior Engineer on this team, you’ll be a technical coach and mentor. You’ll draw on your technical expertise to build Reddit’s next generation media platform and to ensure all of our systems have high uptime and strong performance while working with your team to build a roadmap to match the needs of an ever growing engineering organization and to fuel the next wave of Reddit’s growth. Additionally, as part of The Core Systems & Libraries team you’ll design, build, and run many critical foundational services, platforms, and libraries (media and non-media) that all engineering teams at Reddit rely on to serve our users and partners. Join us and help build the future of Reddit! You will: Develop and design new and innovative solutions to scaling Reddit Build platform API projects that scale to the rest of the organization Mentor and coach more junior engineers on your direct team to achieve our mission Build, deliver, and operate services that scale to millions of transactions per second at 5+ 9’s of availability Help us to optimize Reddit’s media experience for hundreds of millions of users across the world. You have: Strong software development experience in one or more general purpose programming languages; Python, Go or

pythonawsgcp
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