Senior Software Developer I at Lessen | Chicago

About Us: DV Trading is a prominent player in the global financial services landscape, leveraging proprietary capital, innovative trading strategies, and robust risk management methods to enhance liquidity across diverse financial markets and asset classes. Established two decades ago and based in Chicago, DV Trading has expanded to encompass a workforce of around 600 professionals across North America, Europe, the UAE, and Asia. Our affiliates include two broker-dealers, a futures commission merchant, and a registered investment adviser. Position Overview: We seek a skilled Back Office Software Developer to join a dedicated team responsible for the design, development, and ongoing operation of back-office systems that support trading, risk management, and accounting functions. Key Responsibilities: Collaborate with software engineers, risk managers, accountants, and traders to ensure effective real-time and batch data processing. Create daily reports for the firm and traders based on overnight data. Design and implement database schemas to optimize data processing. Monitor daily operations to guarantee timely distribution of critical information. Facilitate the flow of real-time trade data to deliver accurate intraday position and trade data to both risk management and trading teams. Qualifications: A Bachelor’s degree or higher in Computer Science, Engineering, or a related technical field. 3+ years of professional experience in developing data processing software. Proven programming expertise in C++, preferably within a Linux environment. Strong experience with SQL and database schema design. Familiarity with Python on Linux is advantageous. Excellent verbal and written communication skills in English. Familiarity with trading in futures, options, equities, treasuries, and cryptocurrencies is a plus. Benefits: Highly competitive salary and bonus structure Meritocratic environment with significant growth opportunities Comprehensive Blue Cross Blue Shield Medical PPO Health Savings Account, MetLife Dental, and MetLife Vision Coverage Flexible Spending Account Employer-paid life insurance Optional Long-term Disability and AD&D Insurance Pre-tax parking and transit benefits Casual work environment

Join our dynamic team at Daniels Sharpsmart as a Software Development Manager, where you will oversee a talented group of five software developers. In this pivotal role, you will be responsible for designing, developing, and maintaining innovative in-house software solutions that enhance our business operations. The ideal candidate will possess exceptional leadership skills, technical expertise, and a proven ability to integrate applications with our Databricks Data Lakehouse to provide robust, data-driven functionality. If you thrive in a fast-paced, agile environment and are passionate about delivering scalable and reliable software tailored to internal needs, we want to hear from you!

Jump Trading Group brings together experts in mathematics, physics, and computer science to push the boundaries of research in finance and technology. The company values collaboration, creativity, and intellectual honesty, encouraging team members to challenge themselves and each other while working toward shared goals. Research at Jump not only drives strong returns but also leads to technologies that support startups and research partnerships across industries. About the Core Development Team The Core Development team designs, builds, and maintains the advanced trading platforms that power Jump’s business. This group spans multiple locations and combines software and hardware engineering, data science, and research. Projects range from improving the core trading engine to developing custom hardware, all with the goal of supporting trading operations and strategic objectives. What You Will Do Design, build, and test systems and tools that keep Jump’s trading business moving forward Work closely with traders, quantitative researchers, and fellow technologists to solve complex technical problems Tackle challenges involving CPU architecture, operating systems, networking, and hardware integration Who We’re Looking For Strong problem solvers with a passion for technology and curiosity about how things work Comfortable working in a high-energy setting and collaborating with a diverse team Interest in both software and hardware engineering Locations Roles are available in Chicago, New York, and Austin.

Maven Securities Holding Ltd is a proprietary trading firm based in Chicago. The team trades its own capital using a mix of discretionary, systematic, and market-making strategies. The firm focuses on global listed derivatives, relying on strong trading expertise, advanced technology, and in-depth research to improve liquidity and market efficiency. Role Overview This Software Developer position centers on building and maintaining proprietary trading platforms. The work spans the full software development lifecycle, with a particular emphasis on frontend architecture and real-time data management. What You Will Do Participate in all stages of software development for in-house trading systems. Design and build a high-performance UI technology stack from the ground up. Improve frontend systems to handle demanding real-time data streams. Lead greenfield projects, shaping new software from initial concept through delivery. Work closely with Traders and UI/UX Designers to gather requirements and feedback. Add features that support user customization, sharing, and notification management. Refactor and resolve technical debt, especially in legacy multi-code processing areas. Expand the platform to support a broader range of datasets. Migrate legacy applications for pricing and external requests onto the strategic platform. Location This role is based in Chicago.

Join our dynamic team in a hybrid capacity at our Chicago office, attending in-person on Tuesdays and Thursdays.Why This Role is Exciting?Become an integral part of the evolution of the Grindr app! As a member of our Android team, you will tackle complex challenges, leverage cutting-edge technologies, collaborate with an exceptional team, and contribute to a unique application that serves the LGBTQ+ community on an unprecedented scale. Grindr is proud to lead the way in innovation within the social media landscape.Role ResponsibilitiesCollaborate effectively with a talented, cross-functional team across various time zones to enhance Grindr's user experience.Navigate multiple work streams and embrace ambiguity as a catalyst for innovative thinking.Drive innovation by utilizing data-driven insights to inform the adoption of new technologies, architectures, and workflows.Enhance your team's technical capabilities; support the adoption of new tools and methodologies.Develop Android applications, demonstrating proficiency in:Kotlin programmingManaging extensive codebases while ensuring clean, well-structured code for ease of understanding, modification, and debuggingOptimizing performance for large, intricate applications to ensure a seamless user experienceDesigning applications with scalability in focusImplement best practices in software engineering collaboration and design patterns, including MVVM, Coordinator, one-way data flow, and modular architecture.What We Value in YouYou take pride in ownership and consider the broader impact of your work within the organization.You possess a minimum of 6 years of experience in developing sophisticated Android applications.Your technical expertise inspires creativity and innovation among your peers.You have experience in product leadership and technical decision-making, able to balance product needs with code quality.You have collaborated closely with various stakeholders to drive project success.

Join our dynamic team at Sonsoft Inc. as a skilled .NET Developer specializing in WCF (Windows Communication Foundation). In this pivotal role, you will design, develop, and maintain robust applications that serve our diverse client base. Your expertise in .NET technologies will be instrumental in driving innovation and enhancing system performance.

At IMC, we are pioneering the integration of agentic AI into the developer workflow for our key production systems. As a vital member of the Agentic AI engineering team, you will be instrumental in developing agents, MCP servers, and evaluation loops that ensure AI-generated code is reliable, auditable, and expedient to deploy. Collaborating closely with seasoned engineers and platform teams, you will facilitate impactful AI integrations on a large scale.Key ResponsibilitiesEnhance our platform by implementing agents, MCP servers, and supporting services that propose and execute changes to extensive codebases.Assist in the development of retrieval systems that provide AI agents and developers with accurate, real-time context from vast code repositories and design artifacts.Contribute to measuring and refining AI-generated modifications by constructing compile/test/evaluate pipelines (including static analysis, style and safety checks, performance gates, and code reviews).Utilize IMC’s best practices in concurrency, telemetry, configuration hygiene, and performance-sensitive code paths to guarantee that AI outputs are both reliable and idiomatic.Work collaboratively with teammates on experiments aimed at evaluating and enhancing AI-driven workflows.

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 environment where every team member is valued and empowered. Our Approach: Our dedicated team of data analysts, strategists, and technologists work collaboratively to create authentic connections between brands and consumers by leveraging connected data, content, and decisioning. As part of Omnicom's Precision Marketing Group, our team of over 2,000 experts spans more than 15 global markets, committed to delivering exceptional results. Your Role: We invite a motivated Software Development Engineer in Test (SDET) with a focus on AI/ML systems to become part of our dynamic team. We value entrepreneurial thinkers who excel in fast-paced, problem-solving environments. Your Responsibilities: Design, develop, and maintain automated test scripts for functional, API, and database testing. Embrace emerging AI-driven testing solutions and modern quality engineering practices. Adhere to automation guidelines and update scripts based on project requirements. Generate and manage test data for clean test environments using CRUD principles. Collaborate with developers and QA peers to review automation scripts and ensure quality standards. Effectively communicate test results to stakeholders. Take ownership of assigned automation tasks and deliver results proactively.

DV Trading seeks a Software Developer to join its Chicago office. This role centers on building software that supports trading operations and helps streamline processes throughout the firm. Key responsibilities Design and develop software that backs trading activities Build tools to improve efficiency for trading teams Work closely with colleagues to identify and solve technical challenges Requirements Professional experience developing software Interest in exploring new technologies Motivation to contribute within a trading-focused environment Location This position is based in Chicago.

Join Databricks as the Director of Sales for our VC-backed startup division, leading a dynamic team across the West Coast. You will be at the forefront of driving revenue growth and developing strategic sales initiatives to expand our market presence. Your expertise and leadership will guide the team in exceeding sales targets while fostering a culture of collaboration and innovation.

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 dynamic team as a Software Engineer II where you will engage in various aspects of our application alongside passionate engineers experienced in full-stack development. Our Agile scrum teams operate on a two-week sprint cycle and include a dedicated Product Owner, Scrum Master, and 5-7 developers. In your first month, you will undergo comprehensive onboarding, start developing production-grade code, and participate in pull-request reviews, immersing yourself in our collaborative culture.

Join Inspire11 as a Software ArchitectAt Inspire11, we pride ourselves on being a community of innovative thinkers and problem solvers. Our team, whom we affectionately call 'Elevens', is characterized by curiosity, resilience, and an unwavering commitment to excellence. We foster an environment that encourages collaboration and growth, ensuring that we maintain a strong alignment with our core values.Inspire11 is more than just a consulting firm; we are a catalyst for change. Our unique approach allows us to deliver measurable value to our clients, helping them navigate complexity while achieving sustainable solutions. We are driven by our mission to create value every day and strive to innovate continually.If you are ready to take your career to the next level, to think differently, and to make a significant impact, you will find a home here at Inspire11.

Join our innovative team at stemxpert1 as a Perl Developer where your expertise in Perl programming will be utilized to build and maintain high-quality software solutions. You will work closely with cross-functional teams to deliver robust applications that meet our clients' needs.

Join our dynamic team as a .NET Developer where you'll collaborate closely with clients, product owners, and team members to refine and design application features that deliver significant business value.As a key member of a self-organized agile feature team, you'll be a respected contributor in a collaborative environment.Your focus will be on automation and test-driven development, producing clean, maintainable code that can be deployed continuously.Engage in our high-performance workspace designed to enhance team interactions and foster innovation.Innovate and design improvements to our continuous delivery process with fresh, creative solutions.

Join our dynamic team at Sonsoft Inc. as an ASP.NET Developer, where you will contribute to innovative projects that enhance our digital solutions. As a key member of our development team, you will work on designing and implementing high-quality applications, ensuring scalability and performance.

Join our dynamic team at eproinc as a SharePoint Developer. In this role, you will be instrumental in designing, developing, and maintaining SharePoint applications. You will collaborate with cross-functional teams to implement solutions that enhance productivity and streamline processes.

Join our dynamic team at 360IT Professionals as a C++ Developer. In this role, you will be responsible for designing, developing, and maintaining high-performance applications using C++. You will collaborate with cross-functional teams to deliver innovative solutions that meet our clients' needs.The ideal candidate will have a strong understanding of C++ programming and be proficient in various development tools. If you are passionate about technology and eager to contribute to exciting projects, we want to hear from you!

Join our dynamic team at 360IT Professionals as a PeopleSoft Developer. In this role, you will be responsible for designing, developing, and implementing PeopleSoft applications to meet the needs of our clients. You will work closely with project stakeholders to gather requirements and create custom solutions that enhance user experience and operational efficiency.