Senior Software Engineer (Java) - Contract at Lazer

Lazer [Upgrade to PRO to see link] is a world-class digital product studio composed of 180+ senior engineers and designers with backgrounds from companies like Apple, Google, Coinbase, and more. With our product experience, we have designed, engineered, and grown products from $0 to $200M in revenue. Clients seek out our help because we have the talent to deeply understand their needs and provide industry, technical, or product insights that are uniquely valuable to their efforts. Our clients range from early-stage startups and venture studios to recognizable retail brands and exciting enterprises. Some of our notable clients include Google, Shopify, Coinbase, Alchemy, Hinge, OVO, Polymarket, and more. We are a remote-first organization headquartered in Toronto, Ontario, with employees worldwide. We believe in providing the best experience possible for all Lazerites by fostering a strong community through regular events, company vacations, competitive compensation, unlimited PTO, and more! Join Lazer and help us solve problems and build the next generation of products! We are looking for a Senior Java Developer to join our team and work on backend integrations for major commerce brands. You will focus on the service layer and integration layer, connecting external systems with Shopify and other platforms. The ideal candidate has strong experience building and managing backend systems, working with APIs at scale, and delivering high-quality integration solutions. Please Note: This is a Contract position (hourly rate). We welcome applications from across the globe, but our preferred candidates should be able to work in Eastern Standard Timezone (EST). RESPONSIBILITIES: - Design, develop, and maintain backend integration services connecting external systems with Shopify and other commerce platforms - Build and manage service layer and integration layer components for client projects - Develop and consume APIs, with a focus on GraphQL (Shopify’s primary API) and REST - Implement webhooks, asynchronous processing, and scheduled job workflows - Collaborate with cross-functional teams including architects, engineers, and project managers across multiple time zones - Ensure high performance, scalability, and reliability of backend services handling high-volume transactions - Participate in code reviews, technical discussions, and continuous improvement of development practices - Work directly with clients to understand integration requirements and deliver solutions REQUIREMENTS: - 5+ years of professional Java development experience - Proven track record building and managing backend systems and integration services - Proficiency working with APIs like GraphQL and REST API experience is required - Experience with webhooks, event-driven architecture, asynchronous processing patterns, and scheduled tasks - Strong understanding of Computer Science fundamentals (data structures, algorithms, system design) - Experience working with Git, CI/CD pipelines, containerization (Docker) - Proficiency working with different Relational (PostgreSQL, MySQL) and Non-relational databases. - Available to work Eastern Time (ET) ) hours NICE-TO-HAVES: The following would be bonus experience to have, though highlight any additional experience or skills you may have. We like working with people with varied backgrounds and experiences. - Experience with Shopify APIs or the Shopify ecosystem - Background in e-commerce or ERP system integrations - Experience with Spring Boot or the Spring ecosystem - Experience with middleware and message queues (Kafka, RabbitMQ) - Familiarity with cloud platforms (AWS, GCP, or Azure) - Prior experience in an agency or consulting environment - Experience with data migrations between platforms AI in our hiring process We use AI to help us review and shortlist applications based on job-related criteria. A human hiring manager always makes the call on who moves forward. As a company that builds with AI every day, we're all for candidates using it too — just be upfront about how it helped. Why Work With Us - 🚀 Accelerate Your Growth: Work across multiple industries and cutting-edge projects with a team that ships fast. - 💥 Maximum Impact: Shape the future of the tech industry by helping ambitious projects reach their potential. - 🏅 True Ownership: Everyone ships code and has real autonomy with minimal meetings. - 💡 Continuous Learning: Be part of a team of senior engineers and designers who love learning and knowledge sharing. WHY THIS MIGHT NOT BE FOR YOU - 🤖 You Resist Modern Tools: We leverage AI and cutting-edge technology to build rapidly and focus our energy on solving the most complex, high-impact challenges for our clients. - 🏗️ You Crave High Structure: We thrive in an autonomous, fast-moving environment, which means you need to be comfortable with some ambiguity. - 😴 You Prefer Conventional Careers: Our consulting approach involves varied projects and direct client interaction — it's not for everyone. - 1️⃣ You Like Staying in One Lane: Our projects require adapting to different tech stacks and modern tooling quickly. BENEFITS & PERKS - 🌐 Work From Anywhere: Choose your workspace — all you need is strong wifi and a passion for building! - 🧘‍♂️ Work / Life Balance: We believe in our team’s ability to have it all; a great career, and time to unplug and live…you know...life. - 🩺 Employee Care: We provide full benefits (healthcare, dental, vision) for our employees (401k for our US employees) - 🏖️ Unlimited PTO: Everyone needs a break. Take at least 15 days off a year, and more if you need—just be cool about it and keep the team in mind. - 🎉 Regular Team Retreat: Join us for a week of team bonding at amazing destinations. Recent trips include the Dominican Republic, Cancun, and Hawaii — plus ones welcome.