Senior Java Software Engineer Jobs in Stony Brook, NY

Department: Engineering

Employment Type: Full Time

Location: Melville, NY

Compensation: $150,000 / year

Are you ready to shape the future of retail technology? As a Senior Software Engineer at KWI, you’ll play a critical role in redefining how retailers connect with customers, streamline operations, and scale with confidence. This is more than just a coding role — it’s a chance to help architect scalable systems, solve complex real-world challenges, and directly impact the success of thousands of retailers. You'll be joining a high-performing, collaborative engineering team that thrives on creativity, agility, and continuous improvement. Whether it’s optimizing our backend systems, building seamless integrations, or launching new AI-driven features, your work will influence the way modern retail is done.

We are a small team with a big vision: to be the premier provider of cloud technology solutions for retailers. KWI offers a complete, unified commerce solution from a single database, specifically designed to help specialty retailers grow their business. Our portfolio of customers includes Pandora, Bluemercury, Tom Ford and many other globally recognizable brands.

We combine Point of Sale, Merchandising, Order Management, eCommerce, CRM, and Loss Prevention into one cloud-based platform. We are a Values and Mission driven organization, and we believe that if we develop and demonstrate leadership in our strategy, operations, and people, we will continue to drive product innovation and service excellence.

• Building partnerships and working collaboratively with others to meet shared objectives
• Operating effectively, even when things are not certain or the way forward is not clear
• Takes full ownership over decisions, actions or failures

• Lead the development and implementation of software projects from inception to deployment.
• Be a creative problem solver who can draw on an array of expertise and technology to design and implement reliable, scalable, and maintainable solutions to challenging problems.
• Works closely with teams to deliver transformational change to our processes and technologies across multiple teams.
• Lead the technical specification, development, integration, testing and release of software components
• Identify and address technical challenges, optimize code for performance, and participate in ongoing code refactoring.
• Use AI to develop applications and help solve problems.

• BS Degree in Computer Science/Engineering related degree or equivalent work experience.
• 6+ Years of production coding experience, demonstratable experience in objected oriented programming.
• Have some demonstratable experience developing with AI, Claude Code, Agent OS, Spec Driven development.
• Expertise in Service-oriented architectures, microservices, advanced database schemas, relational and nonrelational databases, highly scalable and available web services.
• The ability to context shift and manage multiple priorities at the same time.
• Hands-on experience in building RESTful Web Services.
• Experienced with microservices.
• Prior experience using SQL, Hibernate, and one or more DB (MySQL, Oracle, Postgres, etc)
• Prior experience using NoSQL. (Redis, MongoDB, DynamoDB, etc)
• Experience with automated testing frameworks (TDD, Mocking, Unit/Functional/Integration)
• Experience with various version control systems, defining code branching strategies and build processes.
• Experience with development and CI tools: maven, git, Jenkins, Puppet, Crucible, Jira.
• Experience working with messaging systems. (RabbitMQ, Kafka)
• Experience with a variety of different programming/scripting languages.
• Extensive experience with Agile methodologies such as Kanban, Scrum or SAFE.

• Full Medical, Dental and Vision
• Annual bonus eligible
• Free gym in the building
• Generous PTO policy
• Summer Fridays all year round
• Tuition Reimbursement
• Discount from building café
• 401(K) with a 50% company match (up to 6% of employee contribution)
• Employee Referral Program
• 1 Volunteer day each year

We understand that our teams need flexibility, which is why we follow a hybrid schedule. Our in-office days of Monday, Tuesday and Thursday, and employees are allowed to work remotely on Wednesdays and Friday.

We are also a collaborative group and believe that getting together in person allows our team to do their best work. Together we enjoy monthly events, bagels every Thursday, a state-of-the-art coffee machine, a full snack pantry and many more surprise and delight moments throughout the year.

At KWI, we know that cultivating diversity and fostering an inclusive work environment is critical to our impact and success. We create an environment where no individual is advantaged or disadvantaged because of their background. We offer equal opportunity employment regardless of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability status, age, marital status, or protected veteran status.

With a commitment to maintaining a bias‑free environment in which harassment is prohibited, we respect cultural diversity and comply with the laws of the places in which we operate. We expect our business partners, suppliers, clients, and all our team members to uphold these commitments.