Role Description The Java Full Stack Developer is responsible for designing, developing, and maintaining scalable, secure, and high-performing web applications across backend and frontend systems within a SaaS environment. This role delivers end-to-end development, including architecture, API integration, database design, and performance optimisation, while collaborating with cross-functional teams to build reliable, maintainable solutions that support platform growth. - Design, develop, and maintain scalable backend and application components. - Participate in the full software development lifecycle, including requirements gathering, solution design, development, testing, deployment, and support. - Develop and maintain applications using Java, Spring Boot, Spring MVC, Spring Security, Hibernate, and JPA. - Support frontend integration and development tasks using HTML5, CSS3, JavaScript, and modern UI technologies where required. - Design and maintain relational database schemas, write optimised SQL queries, and support data integrity, performance, and reporting requirements. - Contribute to secure authentication and authorisation flows using technologies and standards such as OAuth2 and JWT. - Work closely with QA, DevOps, product, and design teams to support quality delivery outcomes. Qualifications - Bachelor’s degree in Computer Science or related field, or equivalent experience, with 3+ years in Java web application development. - Strong proficiency in Java (11+) and core concepts such as OOP, collections, streams, and exception handling. - Hands-on experience with Spring Boot, Spring MVC, Spring Security, Hibernate, and JPA. - Proven ability to design, build, and maintain RESTful APIs and integrate third-party services. - Solid understanding of frontend technologies (HTML5, CSS3, JavaScript) and database management (MySQL/PostgreSQL). - Experience with Git, build tools (Maven/Gradle), Agile methodologies, and strong debugging/problem-solving skills. - Exposure to modern tools and practices such as React, Docker, CI/CD, cloud platforms, and secure coding standards is advantageous. Benefits - Work from home. - Monday to Friday 7AM to 4PM PHT (adjustments will be made for daylight saving time). - HMO with 2 free dependents and medical reimbursements. - Government-mandated benefits. - Work from home allowances. - Opportunities to work with leading companies in Australia and beyond. - Training programmes for career development. - Engaging company outings, team activities and wellness sessions. - Supportive, inclusive culture. - Dedicated managers focused on your growth and success. Company Description Twoconnect connects highly skilled Filipino professionals with established companies in Australia, New Zealand, the United States, the United Kingdom and Europe, providing direct access to global careers and long-term opportunities. - We offer competitive pay and benefits, additional entitlements and structured career development programs that make employment both financially rewarding and professionally sustainable. - Our industry-leading retention rate demonstrates our commitment to a people-first culture that prioritizes stability, growth and genuine care for every employee. - Twoconnect is an equal opportunity employer. We value cultural diversity and foster an inclusive workplace where every employee is respected and supported as part of a growing global team. 🔗 Learn more about us through our official pages: - Website: twoconnect.com.au - Careers: apply.workable.com/twoconnect-careers - LinkedIn: linkedin.com/company/twoconnectau - Facebook: facebook.com/2woconnect - Instagram: instagram.com/twoconnect_

• Design the full end-to-end IoT platform architecture: device connectivity layer → MQTT/protocol ingestion → stream processing → time-series storage → REST/GraphQL API layer → real-time WebSocket delivery • Define the multi-tenant data model: strict data isolation between customers, tenant-scoped API tokens, row-level security • Design the device lifecycle system: provisioning, X.509/JWT authentication, device registry, status tracking, decommissioning • Architect the protocol abstraction layer so MQTT, Modbus, OPC-UA, CoAP, and HTTP devices all normalise to the same internal data model • Design a configurable rule engine: event-condition-action rules for alerts, automations, and integrations — no code required from customers • Plan OTA firmware update management: secure delivery, versioning, rollback, fleet orchestration • Write Architecture Decision Records (ADRs) for every major technical choice — nothing undocumented • Design the scaling path from 100 devices (pilot) to 500,000+ (production) without structural rework • Build core platform services from scratch: device management, telemetry ingestion, rule engine, notification/alerting, OTA update, multi-tenant API gateway • Develop REST and GraphQL APIs with full OpenAPI specification — version-controlled from Day 1 • Implement WebSocket and SSE endpoints for real-time telemetry delivery to web and mobile clients • Build device command-and-control with acknowledgement, retry logic, and timeout handling • Implement device shadow service: last-known state of every device accessible even when offline • Write unit, integration, and load tests — no service reaches staging without test coverage • Own service reliability: SLO definitions, alerting runbooks, on-call incident response • Provision and manage all AWS environments (dev, staging, production) using Terraform — no click-ops • Configure AWS IoT Core: MQTT endpoint, topic namespace, rules engine, certificate management • Set up CI/CD pipelines via GitHub Actions for all backend services • Configure CloudWatch monitoring, log aggregation, and automated health alerts • Manage IAM for all team members — least-privilege access, no shared credentials • Hand off infrastructure fully documented when a DevOps engineer joins in Phase 2

• Understand, modify, and improve an NVIDIA proprietary GPU compiler backend written in C++ • Design and develop new register allocation compiler passes and optimizations to produce best-in-class, robust, supportable compiler and tools • Work with global compiler, hardware and application teams to oversee improvements and problem resolutions • Be part of a team that is at the center of deep-learning compiler technology spanning architecture design and support through functional languages

• Understand, modify, and improve an NVIDIA proprietary GPU compiler backend written in C++ • Design and develop new compiler passes and optimizations • Work with global compiler, hardware and application teams • Be part of a team that is at the center of deep-learning compiler technology