Senior Java Full Stack Developer

Position OverviewThe Senior Java Full Stack Developer contract role involves the design and development of scalable, high-performance enterprise applications, emphasizing backend services and cloud-native architecture. In this position, you will leverage modern Java frameworks, APIs, and distributed systems, actively engaging in platform development and inte…

Join Liaison International, a leader in supporting higher education institutions for over 30 years. We are proud to be the driving force behind innovative platforms like the Centralized Application Service (CAS), Enrollment Marketing services and platform (EMP), SlideRoom, Time2Track, TargetX (CRM), and Othot.Our mission is to utilize our extensive experience to enhance our partnerships and expand our impact. With over 31,000 programs across more than 1,000 campuses, we are a pivotal ally in achieving comprehensive enrollment objectives — and are assembling a talented, data-driven team to ensure our continued success in the coming decades.As a key member of our Software Development team, the Senior Full-Stack Developer will lead a scrum team and be instrumental in designing and developing software solutions that create and enhance highly scalable, web-based multi-tenant applications for various educational institutions, including numerous colleges and universities.

Join us as a Senior Full Stack Developer I to play a pivotal role in a high-profile, AI-driven financial compliance program for the Department of War. This essential initiative is focused on modernizing compliance and audit workflows for over 180 systems. You will be responsible for architecting and securing the deployment infrastructure that supports AI-assisted compliance validation, semantic search, and enterprise governance within restricted Department of War environments.This position offers a hybrid work model, with a preference for candidates based in the D.C. metro area who can participate in in-person meetings as necessary.At MetroStar, we believe that exceptional technology services are built from the ground up by amazing individuals. For over two decades, we have cultivated a legacy of assembling the brightest teams. Our commitment to our people is unwavering, as we are driven by a mission that emphasizes a passion for our people and a dedication to our customers.If you see yourself contributing to our mission and helping us achieve our goals, we encourage you to explore the details of this opportunity below!

Location: Montreal, Canada (Hybrid) Job Type: 12-month contract Experience Level: 7+ years Work Focus: 70% Frontend (React/TypeScript), 30% Backend (.NET Core) Role Overview dyneits is looking for a Senior Full Stack Developer to help advance Capital Markets applications, including IRIS and CurveBuilder. The position centers on frontend work with React and TypeScript, while also involving backend contributions in C# .NET Core. This hybrid role is based in Montreal and involves close collaboration with trading and IT teams worldwide. Main Responsibilities Frontend Development (Primary) Design and build user interfaces using TypeScript and React. Improve and maintain application interfaces for a strong user experience. Apply advanced frontend techniques such as Promises, Redux, and Callbacks. Implement real-time communication with SignalR. Backend Development (Secondary) Develop backend services with C# .NET Core. Support and enhance IRIS backend systems. Create and maintain APIs and business logic. Application and Performance Improvement Work on application performance and scalability enhancements. Contribute to system modernization and evolution. Maintain code quality and efficiency. DevOps and CI/CD Maintain and improve CI/CD pipelines. Work with AWS, Kubernetes, and Git as part of the deployment process. Team Collaboration and Support Work closely with global IT teams and stakeholders to meet project objectives. Support NY USD trading teams, particularly during overlapping time zones. Participate in solution design and technical discussions. Help ensure clear communication across international teams.

Join our dynamic team at Momentum Financial Services Group as a Full Stack Developer. In this pivotal role, you will leverage your expertise in both front-end and back-end technologies to create robust and scalable applications. Collaborate with cross-functional teams to design, develop, and deploy innovative solutions that meet the evolving needs of our clients.

Vestmark seeks a Senior Full Stack Software Engineer with strong experience in Ruby on Rails and React. This role centers on improving the company’s financial advisor portal, contributing to both backend and frontend development. Role overview As a senior engineer, you will work alongside product managers, designers, and other engineers. The team values collaboration and expects clear communication as part of the daily workflow. The focus is on building applications that are reliable, scalable, and perform well under real-world conditions. Location and work model This position follows a hybrid schedule based in Wakefield, MA or Cambridge, MA. Some in-office presence is required, balanced with remote work flexibility. Key technologies Ruby on Rails React

Role overview MetroStar Systems seeks a Senior Product Developer I for a hybrid position in Reston, VA. This role centers on designing and building scalable web applications, with particular attention to front-end architecture and reusable design systems. Responsibilities span full-stack development, including API design and integration. What you will do Develop and maintain scalable web applications, working across both front-end and full-stack projects. Create and support reusable design systems to promote consistency and efficiency. Design, implement, and integrate APIs within larger development efforts. Apply strong standards for usability, accessibility, performance, and code quality. Conduct thorough testing to ensure reliability and performance. Collaborate with other developers and teams to improve delivery efficiency. Contribute to Agile development and DevOps practices, including containerization and CI/CD pipelines. Location This is a hybrid position based in Reston, VA.

Prophet Security creates automation tools designed for security teams. The company’s platform analyzes security alerts, builds and executes investigative plans, and delivers actionable findings. Security analysts use these results and provide feedback, helping improve automation over time. Prophet Security is led by a founding team with over 30 years of cybersecurity experience from organizations including Abnormal Security, Expel, Mandiant, McAfee, Oracle, Red Canary, Red Hat, Riverbed, and Symantec. Headquarters are in Menlo Park, with a hybrid work model. Role overview This Senior Full Stack Software Engineer role focuses on building the user-facing elements of Prophet Security’s AI SOC platform. As an early engineering team member, there is significant influence over product direction, technical architecture, and team culture. The initial emphasis is on frontend development, designing and implementing interfaces that security analysts use to investigate alerts, review AI-generated findings, and respond to threats. Over time, responsibilities can expand to backend systems, such as APIs, data pipelines, integrations, and services supporting the platform. What you will do Work with design, product, and backend engineers to deliver features for security analysts Collaborate with the security operations team and interact directly with customers to understand practical needs Shape product direction, technical architecture, and engineering practices as part of the early team Requirements Strong, recent experience in modern frontend development Interest in both frontend and backend engineering Comfort working collaboratively in a startup setting Location This position is based in Menlo Park and follows a hybrid work schedule.

Location: Montreal, Canada (Hybrid) Interview Process: Face-to-face interview (mandatory) Eligibility: Local candidates only Job Type: Contract (6–12 months) Experience Level: Senior Role Overview dyneits seeks a Senior Java Developer to design and build high-performance APIs connecting MLFlow with Model Risk Management (MRM) platforms. This role sits at the intersection of backend engineering, data architecture, and model governance. The developer will work closely with data science, risk, and technology teams, using AI-assisted development tools to improve productivity and code quality. What You Will Do API Development and System Design Design and implement scalable, secure RESTful APIs in Java Integrate MLFlow lifecycle artifacts (models, runs, metrics, metadata) with enterprise MRM systems Develop backend services supporting model onboarding, validation workflows, governance, and auditability Data and Architecture Create and manage data models that align with MRM and regulatory requirements Work with DB2 and/or MongoDB to ensure data quality, lineage, and traceability Ensure API design meets enterprise architecture, security, and compliance standards Collaboration and Delivery Work alongside data scientists, model validators, risk managers, architects, QA, and DevOps teams Participate in design sessions, architecture reviews, and code reviews Support the full software development lifecycle: development, testing, deployment, and production support AI-Assisted Development Use AI coding tools such as GitHub Copilot, AMP, and Claude Code Apply AI for code generation, refactoring, test creation, documentation, and productivity improvements Maintain secure and responsible use of AI tools Performance and Reliability Optimize API performance, scalability, and reliability Implement monitoring, logging, and error handling systems

FanDuel is hiring a Senior Software Engineer with expertise in Java and Python. This role is based in Edinburgh and follows a hybrid work model, blending in-office and remote days. Key responsibilities Design and develop software to enhance the FanDuel platform. Work closely with fellow engineers to produce reliable, maintainable code. Share technical knowledge and contribute to team discussions and planning sessions. Location and schedule This position is located in Edinburgh. The hybrid schedule means splitting time between the office and working remotely.

Location: Toronto, Canada (hybrid, 4 days onsite) Job Type: 10-month contract (extension likely) Experience Level: 8–10 years Role Overview dyneits is looking for a Senior Java Microservices Engineer to help design and build scalable enterprise applications. This contract role focuses on Java, Spring Boot, and microservices architecture, with a strong emphasis on API development and cloud-native practices. The position involves close collaboration with cross-functional teams, leading technical projects, and mentoring engineers to deliver reliable, high-quality solutions. What You Will Do Design, build, and maintain RESTful microservices using Java and Spring Boot Implement asynchronous and concurrent processing for high-throughput systems Develop and refine data access layers with JPA and JDBC Architect and tune high-performance databases for scalability and reliability Create and manage REST and GraphQL APIs Apply event-driven architecture with Kafka Use AI-assisted tools (such as GitHub Copilot) to improve development speed Deploy and manage applications on OpenShift Configure and maintain APIs through Apigee Build and manage CI/CD pipelines with GitHub Actions Work with architects, DevOps, QA, and business teams Participate in code reviews, architecture discussions, and knowledge sharing Mentor and guide junior developers Must-Have Skills 4+ years with Java and Spring Boot microservices, including async and concurrency Deep experience with RESTful APIs and microservices architecture 3+ years in database design, tuning, and optimization 3+ years working with JPA and JDBC Hands-on use of AI development tools (e.g., GitHub Copilot) Strong understanding of secure application development Experience in testing, debugging, and production support Nice-to-Have Skills 1+ year with GraphQL 2+ years with Kafka (event streaming or messaging) Background in cloud-native or distributed systems Key Tools & Technologies OpenShift Kafka GitHub Actions Spring Boot JPA JDBC Apigee

Vestmark is on the lookout for a talented and driven Java Software Engineer who possesses expertise in object-oriented programming and relational databases. If you have a passion for technology and a knack for tackling intricate challenges, we invite you to become part of our innovative development team. In this role, you'll be instrumental in the design, development, and upkeep of high-quality Java applications, services, and systems that will shape the future of our wealth management solutions. Your enthusiasm, technical curiosity, and alignment with our core values will be pivotal in crafting the next generation of our offerings.Responsibilities:Design & Development: Lead the architecture, design, and implementation of scalable and robust Java solutions. Engage in the development of backend systems and APIs that comply with industry standards.Code Quality: Produce clean, efficient, and maintainable Java code. Conduct comprehensive code reviews while championing best practices in software design and coding standards.Collaboration: Collaborate closely with stakeholders, product managers, architects, and fellow engineers to translate requirements into technical solutions. Provide mentorship to junior engineers and share your technical knowledge across the team.Decision Making: Make informed decisions regarding methods, techniques, and evaluation criteria to achieve efficient outcomes.Testing & Debugging: Create unit tests and integration tests, and engage in end-to-end testing. Troubleshoot and resolve complex issues related to performance, scalability, and software reliability.Core Values: Foster the development of our core values: We Before Me, Positive Energy, Knowledge Explorer, and Own It.

Role Overview Callibrity is looking for a Senior Python Developer to help build and maintain applications that support client operations. This role involves both independent work and collaboration with other developers and teams across the company. What You Will Do Design and develop Python-based applications and systems Work with other developers to solve technical challenges Collaborate with cross-functional teams to deliver solutions that meet client needs Work Location This is a hybrid position based in Cincinnati. Team members split time between remote work and the Cincinnati office.

Replit Inc. creates a platform where millions can build software using natural language. By lowering traditional barriers, Replit is changing how applications are built and shipped. Role overview The Senior Developer Experience Engineer focuses on making engineering at Replit more efficient and enjoyable. This hybrid position is based in Foster City, CA, with in-office days on Monday, Wednesday, and Friday. The role spans Replit’s codebases, internal tools, and developer workflows, aiming to remove obstacles and help engineers deliver features quickly and reliably. Supporting developer experience at Replit means smoothing out daily work, reducing operational pain points, and ensuring teams can release new features with less friction. The position works across teams to support every engineer who ships code at Replit. Key responsibilities Maintain and improve internal codebases, tools, and workflows for Replit’s engineering teams Partner with the AI team to advance the internal AI platform, which is responsible for generating over 60% of merged pull requests Refine strategies for the Agent’s default stack and enhance its outputs Work with product and infrastructure teams to ensure technical decisions benefit both developer productivity and customer value Requirements Strong technical skills and experience working with large, complex codebases Ability to assess how infrastructure choices affect both engineers and end users Experience collaborating across teams and influencing developer experience at a broad level This is one of the first roles at Replit dedicated to developer experience, offering significant influence and opportunities for career growth as the team grows.

Join Cloudflare as a Senior Developer in our Go-To-Market team and help us shape the future of the internet. You will play a pivotal role in developing robust solutions that empower our sales and marketing teams. Your contributions will directly influence our growth and success in providing innovative security and performance solutions.

Moneybox serves over 1.5 million people, offering tools to save, invest, and plan for important life goals such as buying a home or preparing for retirement. The platform aims to make financial choices easier and more transparent for its users. Role overview The Senior iOS Developer will contribute to the ongoing development of the Moneybox iOS app. This position involves building new features, maintaining high standards for technical quality, and ensuring the app remains stable and reliable. As part of the mobile team, there may also be chances to support and mentor junior engineers as the group expands. Work location Moneybox offers hybrid or fully remote work options. The company values flexibility while encouraging strong collaboration within the team.

Join Cloudflare as a Senior Manager of Solutions Architecture focused on our AI and Developer Platform. In this pivotal role, you will lead a team dedicated to designing and implementing innovative solutions that leverage our cutting-edge technology. You will collaborate with cross-functional teams, guiding the strategic direction of our architecture and ensuring seamless integration of AI capabilities into our platform.Your expertise will help shape the future of our offerings, enabling developers to build exceptional applications. If you are passionate about technology, enjoy working in a dynamic environment, and have a track record of leading successful architecture initiatives, we want to hear from you!

Join our dynamic team at BambooHR as a Senior Frontend Software Engineer, where you will play a key role in shaping innovative user experiences. You will work on cutting-edge technologies to enhance our product offerings and drive exceptional performance.

Join Cloudflare as a Developer GTM, where you will have the opportunity to work on exciting projects that enhance our product offerings and improve user experiences. As part of our dynamic team, you will be involved in the development and implementation of innovative solutions that drive our go-to-market strategies.

Join Fanatee as a Senior Technical Artist and play a vital role in shaping our innovative game development projects. In this hybrid role, you will collaborate closely with both artists and developers to create visually stunning and technically proficient assets that enhance user engagement. Your artistic vision combined with technical expertise will help us push the boundaries of creativity in gaming.