Senior Software Engineer in Chicago

Join Our Award-Winning Technology Team at RAPP Chicago! About Us: At RAPP, we are pioneers in precision marketing, driving growth with empathy and insight. Our global presence and innovative approach enable us to harness data, creativity, and technology to tailor marketing solutions that resonate with individuals. We believe in fostering an inclusive environ…

Join Our Award-Winning Technology Team as a Senior SDET at RAPP ChicagoAbout Us:At RAPP, we are pioneers in precision marketing, driving growth with empathy and precision on a global scale. Our team integrates data, creativity, technology, and a deep understanding of individual needs to deliver tailored marketing solutions that resonate with diverse audiences.We believe in nurturing individuality, both in our marketing strategies and our workplace culture. Our inclusive environment fosters personal well-being and encourages innovative thinking.Our Approach:Our dynamic team of superconnectors excels in creating value through personal brand experiences, focusing on connected data, content, and decision-making. Our data analysts identify target personas, while our strategists and technologists ensure authentic connections between our clients and their customers.As part of Omnicom's Precision Marketing Group, RAPP boasts a diverse team of over 2,000 professionals across 15+ global markets.Your Role:We are seeking a proactive Senior SDET with a strong background in performance engineering. This role is perfect for someone who thrives in fast-paced environments and is eager to contribute to innovative solutions.Key Responsibilities:Design, develop, and maintain automated testing frameworks across functional, integration, and regression layers.Integrate quality assurance into feature squads, contributing to design, acceptance criteria, and code reviews.Manage test automation integration within CI/CD pipelines (GitHub Actions, CodePipeline, Jenkins).Promote testing standards, patterns, and reusable tools across engineering teams.Define and oversee performance testing strategies, including load, stress, soak, spike, and chaos testing.Collaborate with Engineering, Product, and Platform teams to establish SLO/SLA baselines.Develop performance testing standards and documentation for organizational use.Create and maintain performance test suites using tools like k6, Gatling, or Locust.Simulate realistic traffic patterns, data volumes, and concurrency profiles for AWS-hosted services.

Disclaimer: Please note that the most accurate and current information regarding our open positions, including job descriptions, compensation, and benefits, can only be guaranteed on our official job board. For the latest listings and details, please visit: https://job-boards.greenhouse.io/ninjatrader.JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLDWelcome to the innovative realm of NinjaTrader! As a leading trading platform and futures brokerage, we empower traders to seize control of their financial futures. Our cutting-edge products and services are designed to enhance the trading experience. Whether you are a seasoned trader or just embarking on your journey, NinjaTrader provides award-winning software and brokerage services to navigate the world’s top financial markets with confidence.Our growth story is nothing short of thrilling. Since 2003, NinjaTrader has been committed to understanding and supporting traders on their path to success. As a result of our dedication, our user base has expanded to over 2 million, making us the top-rated futures brokerage globally.But we won’t stop there. We continuously evolve, challenge the status quo, and modernize the futures industry. Our dedication to innovation ensures that users always have access to dynamic tools, real-time support, and a community of like-minded traders.

Join Reddit, a vibrant community platform that connects millions of users through shared interests. We are seeking a Senior Software Engineer to enhance our Test Engineering team within the Quality Engineering organization. In this role, you will collaborate closely with cross-functional teams to design and implement cutting-edge test frameworks and tools that ensure the highest quality in our software development processes. Your efforts will empower engineering teams at Reddit to take ownership of quality, driving improvements across our development pipelines. If you are passionate about quality engineering and are ready to make an impact, we want to hear from you!

Disclaimer: Please be aware that the most precise and updated information regarding our job openings—including job descriptions, compensation, and benefits—can only be confirmed on our official job board. For the latest listings and details, please visit: https://job-boards.greenhouse.io/ninjatrader.JOIN US IN OUR QUEST TO BECOME THE TOP RETAIL TRADING PLATFORM GLOBALLYWelcome to NinjaTrader, a leader in the trading platform and futures brokerage industry. We empower traders by providing cutting-edge products and services designed to enhance their trading experience. Whether you are an experienced trader or just beginning your journey, NinjaTrader equips you with award-winning software and brokerage solutions to navigate major financial markets with confidence. Since our inception in 2003, our commitment to understanding and supporting traders has driven our growth to over 2 million users, establishing us as the top-rated futures brokerage worldwide. We continue to innovate, pushing the boundaries of the futures industry. Our dedication to providing dynamic tools, real-time support, and a community of fellow traders ensures that users always have access to the best resources available.

This is an immediate contract opportunity based in downtown Chicago. We are seeking local candidates who can join our team without delay.Below are the specifics regarding the role.Software Test EngineersThis engagement is scheduled for 6 to 12 months, with a high likelihood of extension. The targeted commencement date is October 1st.Local candidates are required.We are looking for multiple skilled software testers to join our new Enterprise Quality and Release Management Center of Excellence Group. Ideal candidates should possess significant experience in Load and Performance Testing, Automation, Predictive Analysis, and DevOps. Strong communication skills are essential.

Company OverviewZoro.com stands as a premier eCommerce platform dedicated to delivering an extensive selection of nearly 12 million tools, parts, and supplies tailored for business customers. Since our launch in 2011, we have transformed the B2B industry by providing a consumer-centric online shopping experience, solidifying our position at the forefront of digital innovation in technology and distribution. Our rapid growth has propelled us to exceed $1 billion in annual revenue, and we are excited for what lies ahead!Position Overview:We are in search of a talented Senior Software Engineer to spearhead our PROMOS team, which focuses on developing and enhancing digital promotional experiences across Zoro.com. This includes site-wide deals, targeted personalized offers, and loyalty programs.In this role, you will lead the design and implementation of scalable, secure, and reliable cloud-based solutions spanning the entire stack, from user-friendly interfaces built with Vue.js to robust backend services crafted in TypeScript. You will collaborate closely with cross-functional teams, mentor fellow engineers, and drive technological advancements that enhance both customer-facing features and core platform functionalities.Key Responsibilities:Adopt an AI-first approach, integrating AI-driven workflows into daily development practices.Participate in the design, development, testing, and maintenance of high-performance web applications, focusing on scalability, security, and reliability.Utilize TypeScript extensively for building and maintaining backend services with Node.js, as well as frontend applications.Identify opportunities for improvement in team agreements and workflows through collaboration with peers and stakeholders.Act as a proactive leader during team ceremonies, advocating for best practices and maintaining high standards of quality, agility, and maintainability.Mentor and guide engineers, empowering them to contribute effectively to team objectives.Take the lead in creating and enhancing technical documentation, ensuring accuracy, consistency, and accessibility.Own and resolve critical technical issues, ensuring efficient resolutions while identifying areas for improvement.

Welcome to Adyen At Adyen, we are revolutionizing the financial technology landscape by providing an all-in-one solution for payments, data, and financial products for notable clients such as Meta, Uber, H&M, and Microsoft. Our mission is to empower our customers and partners through innovative technology designed for ambition. We foster an environment where our team members can thrive, supported by a culture that promotes individual growth and career ownership. As a team of motivated professionals, we take on unique technical challenges at scale, collaboratively delivering groundbreaking and ethical solutions that help businesses accelerate their ambitions. About the Customer Developer Observability Team We view our customers' success as intertwined with our own. This begins with providing an effortless integration experience for developers and partners. Our team is agile, taking full ownership of our projects from start to finish, dedicated to creating intuitive and robust technology. The Developer Observability team aims to deliver a suite of products that not only provides clarity and troubleshooting insights but also guides customers in implementing industry best practices for optimal integration performance. We are seeking a talented Software Engineer to join our team and contribute to: A full-stack team of Frontend and Backend engineers dedicated to balancing robust design with lean development, validating concepts efficiently and transitioning to highly reliable systems. Building and maintaining a comprehensive data tech stack (PostgreSQL, Kafka, Elasticsearch) that supports products like API Logs and the Developer Dashboard, delivering near-real-time insights while collaborating closely with the data engineering team to highlight performance trends and provide contextual guidance. Working with cross-functional teams to ensure a seamless and consistent integration experience for our customers. Your Responsibilities: Offer a fresh perspective on engineering practices, improvements, and opportunities. Lead complex technical projects from requirement analysis to architectural design, implementation, testing, and production launch. Collaborate closely with the product team to align on customer change scopes. Champion security, compliance, and reliability challenges.

Join our innovative team at Speechify as a Senior Software Engineer specializing in Core Experiences. In this role, you'll be at the forefront of developing cutting-edge software solutions that enhance user engagement and drive product excellence. You will collaborate with cross-functional teams to architect, design, and implement scalable software applications that meet the evolving needs of our users.

Join our dynamic team at NinjaTrader as a Senior Mobile Software Engineer. In this role, you will leverage your expertise in mobile application development to design and implement innovative solutions that enhance user experience. You will collaborate closely with cross-functional teams to deliver high-quality software that meets the needs of our clients.

Array is at the forefront of financial innovation, providing a dynamic platform that enables digital brands, financial institutions, and fintech companies to swiftly launch captivating consumer products. Our comprehensive suite of credit and identity monitoring tools, privacy protection solutions, and a financial advertising marketplace is accessible through modern APIs and embeddable widgets. Through our private label offerings, we not only drive revenue but also enhance user engagement, empowering millions of consumers in their financial journeys. As a fully remote company, we value high-performing individuals who are keen to make a significant impact in the rapidly evolving fintech landscape. Our clear mission, dedication to ongoing improvement, and a culture of experimentation empower our teams to deliver top-notch products that meet the needs of our clients and users. In the role of Senior Software Engineer at Array, you will leverage your extensive software engineering expertise to lead our engineering teams in tackling the most significant challenges we face. Reporting directly to the Engineering Manager, you will be an integral part of a squad responsible for one of our key product sets. This position will commence as a contract role for a 180-day probationary period before transitioning to a full-time position. While this role is fully remote, we are prioritizing candidates based in Chicago, IL, to align with the local talent pool of Go developers.

At PsiQuantum, our mission is to revolutionize computing by developing the world's first practical quantum computers—devices designed to unlock groundbreaking advancements in various industries. Since our inception in 2016, we have been dedicated to constructing and deploying million-qubit, fault-tolerant quantum systems.Quantum computers utilize the principles of quantum mechanics to tackle complex problems that are beyond the reach of today's most advanced supercomputers and AI technologies. The influence of our innovations will extend across numerous vital sectors, including energy, pharmaceuticals, finance, agriculture, transportation, and materials.Our cutting-edge architecture is grounded in silicon photonics. By capitalizing on advanced semiconductor manufacturing techniques, in partnership with industry leaders like GlobalFoundries, we harness the same high-volume processes that produce billions of chips for telecommunications and consumer electronics. The inherent advantages of photonics—such as immunity to heat and electromagnetic interference—provide us with a scalable solution that integrates seamlessly with existing cryogenic cooling systems and standard fiber-optic networks.In 2024, PsiQuantum announced government-funded initiatives aimed at constructing our inaugural utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These projects underscore a growing acknowledgment of the strategic and economic significance of quantum computing, emphasizing the urgency to scale our efforts.Additionally, we are engaged in developing the algorithms and software necessary to realize the commercial potential of these systems. Our software and application teams collaborate closely with prominent Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to deliver quantum solutions that drive real-world results.Quantum computing signifies not merely an evolution of classical computing, but a transformative shift that enables us to address challenges that are otherwise insurmountable. The possibilities are vast, and we have a defined strategy to bring them to fruition.Join us in this exciting journey.

Amper is an innovative, venture capital-backed SaaS technology firm committed to revolutionizing the manufacturing industry from the ground up. Our advanced platform is crafted to convert traditional shop-floor complexities into actionable insights, empowering teams to operate based on real-time data. This transformation enables manufacturers to streamline costs, enhance visibility, and boost operational efficiency.Our team thrives on collaboration, and while we support remote work, we prioritize candidates from the Chicagoland area who are willing to engage in-person for collaborative sessions. There are no strict requirements for office attendance, but local candidates benefit from the opportunity for valuable face-to-face interactions.The Role...As we expand our engineering team, we are seeking a Senior Full Stack Engineer to contribute to the development of our customer-facing and internal products.In this role, you will navigate diverse challenges as a full-stack engineer. Your responsibilities will include building extensive APIs as well as microservices, utilizing Python extensively, and developing front-end solutions primarily with React and various third-party tools. You will be tasked with creating applications for both web and mobile platforms, tackling issues from distributed systems to optimizing individual database queries for enhanced performance.At Amper, being a Senior Software Engineer also means embodying a 'product-centric' mindset. Our engineers are not merely ticket-pushers; under the guidance of a Product Owner, you will engage in brainstorming new ideas and determining the most effective implementation strategies.You Will Thrive at Amper If You:Have a strong curiosity and eagerness to tackle unfamiliar challenges, both technical and customer-oriented.Value humility and helpfulness as highly as technical expertise.Are enthusiastic about sharing your knowledge while being open to learning from others.Qualifications:A minimum of 7 years of professional experience in building and maintaining complex software systems, particularly in B2B SaaS platforms is essential for success.Proven technical expertise in developing both large APIs and microservices, with a strong capability to assess architectural trade-offs and guide team members in implementation.

Each year, companies allocate over a trillion dollars to freight movement throughout the U.S., yet the system for connecting trucks with jobs remains inefficient and disjointed. FleetWorks is revolutionizing this.We are developing intelligent voice agents that streamline the chaotic freight booking process, transforming it into a modern, efficient marketplace. Our agents eliminate the need for countless phone calls, texts, and emails by connecting truckers eager to earn with loads requiring transport.We are expanding our engineering team in Chicago, a key hub for our clients and the epicenter of U.S. freight operations. In this position, you will be an integral part of our core engineering team, directly engaging with the environments where our product impacts real-world operations. You will create production features, design integrations within complex customer systems, and develop internal tools and platform components that facilitate efficient scaling of our deployments.If you are a proficient software engineer eager to engage directly with users, tackle ambiguous challenges in real-time, and witness your code powering live operations within days, this role offers a uniquely impactful opportunity.Discover our Series A funding details here!

About CoinflowCoinflow, a trailblazer in the payments industry, is based in Chicago and is at the forefront of transforming global financial transactions. We empower merchants and marketplaces to accept a variety of payment methods across more than 170 countries, offering instant settlements, AI-driven fraud prevention, and blockchain-based proof-of-delivery.Having secured backing from prominent investors such as Pantera Capital, CMT Digital, Coinbase Ventures, Jump Capital, and Reciprocal Ventures, Coinflow has recently completed a $25M Series A funding round to propel our mission of modernizing cross-border payments.Since our initial funding in 2024, we have experienced tremendous growth, achieving a remarkable 23x increase in revenue and reaching a multi-billion-dollar annual transaction volume run rate!About The RoleWe are on the hunt for a Senior Software Engineer who will play a pivotal role in constructing the core infrastructure that underpins our global payment systems. In this role, you will design and implement systems that manage billions in transactions while collaborating with Product teams to define our offerings, partnering with fellow engineers to refine our methodologies, and taking significant ownership of the systems you develop.What You'll DoBuild Core Payment InfrastructureDesign and implement high-throughput payment processing systems that meet stringent reliability standards.Create APIs and SDKs that facilitate merchant integration with Coinflow.Develop advanced fraud detection and risk management features leveraging real-time data analytics.Scale Our PlatformArchitect systems to ensure performance, reliability, and observability as we scale.Enhance database queries, caching strategies, and service communication for optimal performance.Implement monitoring, alerting, and debugging tools for production systems.Ship Product FeaturesManage end-to-end feature development from technical design to deployment.

At Upbound, we are revolutionizing the construction of modern infrastructure for the Agentic AI Era. As the creators and primary maintainers of Crossplane, we are developing the Intelligent Control Plane, a groundbreaking platform layer that empowers infrastructure to be programmable, autonomous, and composable.Our mission is to enable the AI-native enterprise with a robust foundational platform layer that assists teams in provisioning, managing, and adapting infrastructure at scale—ensuring that platforms are optimized for both human users and AI agents. We collaborate with leading cloud providers, ISVs, and open-source communities to accelerate organizational agility and confidence.Currently, Upbound serves Fortune 500 companies and platform engineers in over 100 countries. With more than 100M downloads, Crossplane is utilized by over 1,000 teams globally. As a Series B company backed by GV (formerly Google Ventures), Altimeter Capital, and Intel Capital, we have successfully raised $69M to date. Discover more at upbound.io.We are seeking a Senior Software Engineer to join our team in building and managing Upbound Spaces, the comprehensive control plane management software at the core of the Upbound Platform. You will play a crucial role in scaling Upbound to support thousands of control planes reliably, while enhancing enterprise control plane management and operations in both cloud and on-premises environments. This is an excellent opportunity to make a significant engineering impact on both development and production operations.

FleetPulse™ stands at the forefront of trailer telematics, providing unparalleled visibility into trailer safety and cargo security through our innovative, OEM-agnostic telematics solutions.Headquartered in Chicago, Illinois, FleetPulse merges extensive experience in the trucking industry with top-tier technology expertise to deliver state-of-the-art telematics solutions. Our diverse portfolio includes OEM-installed sensors, user-friendly aftermarket sensors, and advanced cargo cameras. The data harvested directly from trailer sensors and components fuels real-time, proprietary insights via a digital dashboard, empowering our clients to optimize utilization, enhance safety, and minimize maintenance costs.At FleetPulse, we cherish our workforce as our most valuable asset. We cultivate a collaborative, innovative, and supportive atmosphere where each team member significantly contributes to our collective success. By joining FleetPulse, you will be part of an organization dedicated to revolutionizing the transportation sector while appreciating the unique talents of each individual.Please note: This position requires on-site work in Chicago, IL, and we do not offer relocation assistance.

Join 8th Light as a Senior Software Engineer At 8th Light, we transform innovative ideas into reality. Established in 2006 and based in Chicago, we are a leading technology solutions provider dedicated to partnering with organizations to tackle significant challenges and foster sustainable growth. Our clientele ranges from emerging startups to established global enterprises, allowing us to work across diverse industries to enhance their digital products through innovative strategies, experiential design, AI solutions, and unparalleled engineering expertise. We take pride in our commitment to quality and our culture of curiosity, which drives us to innovate and think outside the box. At 8th Light, we thrive in an environment that promotes continuous learning and development through mentorship and hands-on projects. Our collaborative and open culture, rooted in honesty, builds trust among team members, and we firmly believe that our success is measured by the positive outcomes we create for our clients. If you are inspired by meaningful work and a company culture that values people, you’ve found your ideal workplace.

Join Our VisionIn the rapidly growing landscape of online sports betting, we at DubClub recognize the challenges enthusiasts face when navigating fragmented content across multiple platforms. Our mission is to create a streamlined community where both sports cappers and fans can thrive, fostering trust and engagement.Our Mission:DubClub is dedicated to establishing the ultimate hub where cappers and fans can Win More Together.For Fans: We aim to provide a cohesive and enriching experience for sports fans seeking expert advice and rewards that enhance their interactions.For Cappers: We empower cappers to transform their passion into a sustainable business through an optimized platform that automates marketing and supports growth.For DubClub: We are building a vibrant ecosystem that encourages lasting engagement, transforming fleeting interest into community involvement.The OpportunityWe are seeking a Senior Software Engineer to become an integral part of our Chicago team. This senior individual contributor (IC) role invites you to take ownership of projects and deliver impactful solutions directly to our user base.You will work closely with our founders and go-to-market leaders to pinpoint opportunities for innovation, define project scopes, and implement features efficiently. Your goal is to enhance user experience through swift execution and a deep understanding of our industry.Key ResponsibilitiesCollaborate with customer-facing leaders to shape the product roadmap and deliver exceptional value.Lead the design and implementation of full-stack features for our mobile and web applications.Strategically balance speed, scope, and maintainability to achieve immediate results while ensuring long-term scalability.Provide mentorship and technical guidance to junior engineers, fostering a culture of excellence.

About AdyenAdyen is a leading financial technology platform providing a comprehensive suite of payment, data, and financial products for global brands such as Meta, Uber, H&M, and Microsoft. Our mission is to empower businesses with cutting-edge solutions that facilitate growth and ambition.We nurture a collaborative environment where our team members thrive, supported by a culture that encourages ownership of their career paths. Our motivated individuals tackle complex technical challenges at scale, working together to deliver innovative and ethical solutions that help businesses realize their ambitions faster.Position Overview: Senior Software Engineer (Java), Capital TeamThe Capital Team is integral to our Financial Products solution, enhancing the cash flow of sub-merchants and driving their business growth. We are looking for a passionate Senior Software Engineer (Java) to join us in developing and launching a global lending solution for our clients. This role offers an exciting opportunity to engage with a variety of engineering challenges, from crafting innovative product features to optimizing system scalability. A customer-centric mindset is essential as we build solutions that cater to all clients.