Systems Architect

Systems ArchitectLocation: Sunnyvale, CA Onsite Visa: USC/GC only W2 Duration: 12+ monthsIt's a pure architect role, a senior, hands-on staff engineer doing both architecture and coding (50%-50%). They are looking for a candidate with over 10+ years in Engineering / Computer Science / Software Development. And minimum 5 years specifically in IoT system architecture and software development. Deep C++ development experience is required. (production-level C++ experience | experience building system software or networking systems) Real time production backend services Python Candidates must have experience using MQTT in real systems. Candidates should understand how devices communicate over networks. IoT platform experience Experience building connected systems AWS (Nice to have) For such role target candidates coming from robotics companies, autonomous systems, consumer devices, networking companies, industrial IoT companiesScreening Questions: 1. Have you built or worked on an IoT platform using MQTT? 2. What was your role in designing the messaging architecture? 3. How often do you code today in C++ and Python? 4. What types of devices or systems were connected using MQTT? 5. Have you designed device-to-cloud communication systems? Physical objects that collect data from the environment. Examples: · Temperature sensors · Cameras · Smart meters · Wearable health devices · Industrial machine sensors Example: A sensor in a warehouse measuring temperature or humidity. It is not a pure architect role and not a pure developer role. It is 50% system architecture + 50% coding (C++ and Python). This role is for a Senior IoT Systems Architect who is also hands-on with coding. The person will help connect medical devices (embedded systems) to the cloud using MQTT protocol and AWS services. The candidate must carry understanding of security for connected devices (TLS certificates, authentication, etc.)MUST HAVE SKILLS: MQTT Expertise: MQTT broker configuration | QoS levels | Topic hierarchy | Retained messages | MQTT 5.0 features Strong C++ Development Python Development - for cloud side integration and services. Must understand AWS services supporting IoT connectivity. 10–15 years software engineering with 5+ years IoT architecture, · Strong embedded systems background · Hands-on coding in C++ and Python Years of Experience Required: 10+ years overall; 5+ years in IoT systems architecture mandatory Education: Bachelor's or Master's in Computer Science, Software Engineering, or related technical fieldPrimary Function of Position The contractor in this position will play a key role on the IoMT & Platform Integration team, expanding the MQTT-based IoT architecture across our embedded medical device platforms and AWS cloud infrastructure. This is a 50/50 architecture and hands-on development role — the contractor will leverage the MQTT architecture knowledge while actively contributing production-quality C++ and Python code alongside a team of 4 engineers. Close collaboration with internal engineering, cybersecurity, and product teams is expected throughout the engagement. Design proposals are subject to internal architecture and quality review gates.Essential Job Duties Support the expansion of the MQTT-based IoT architecture across our embedded medical device platforms and AWS cloud infrastructure; Produce architecture decision records (ADRs), interface contracts, design specifications, system diagrams; Implement connectivity middleware and communication services in C++ & Python on device side and cloud side; Architect and implement cloud-side integration using AWS microservices (EC2, S3, and related services) to support the migrated protocol layer Design and implement security hardening: TLS/mTLS, certificate-based device authentication, topic-level authorization, and PKI lifecycle management Design for cloud connectivity reliability: offline buffering, reconnect strategies, message deduplication, and guaranteed delivery patterns appropriate for embedded systems Lead and participate in design reviews with the FTE engineering team; incorporate feedback from internal review gates Support debugging and root cause analysis of connectivity issues during migration and integration testing Produce thorough documentation and conduct knowledge transfer sessions to ensure continuity at engagement closeRequired Skills and Experience Deep expertise in C++ & Python for system-level software developmentStrong MQTT expertise — broker configuration, QoS levels, topic design, retained messages, MQTT 5.0 featuresSolid understanding of pub/sub and RPC messaging patterns, including how to implement reliable RPC over pub/sub protocolsWorking knowledge of AWS microservices (EC2, S3, and adjacent services); ability to design cloud-side components supporting device connectivityStrong grasp of network security fundamentals: TLS/mTLS, PKI, certificate management, and authorization patterns for IoT devicesProven ability to produce high-quality architecture documentation — ADRs, design specs, interface definitionsExcellent communication skills; able to lead design discussions and drive alignment across technical and non-technical stakeholdersQuality-first engineering mindset: writes clean, well-documented, maintainable code that teammates can own after the engagement endsAble to work independently and manage technical ambiguity with minimal guidanceAbout Us: InterSources Inc, a Certified Diverse Supplier, was founded in 2007 and offers innovative solutions to help clients with Digital Transformations across various domains and industries. Our history spans over 16 years and today we are an Award-Winning Global Software Consultancy solving complex problems with technology. We recognize that our employees and our clients are our strengths as the diverse talents and opportunities they bring to the table enable us to grow as a global platform and they are causally linked with our success. We provide strategic and technical advice, and we have expertise in areas covering Artificial Intelligence, Cloud Migration, Custom Software Development, Data Analytics Infrastructure & Cloud Solutions, Cyber Security Services, etc. We make reasonable accommodations for clients and employees and we do not discriminate based on any protected attribute including race, religion, color, national origin, gender sexual orientation, gender identity, age, or marital status. We also are a Google Cloud partner company. We align strategy with execution and provide secure service solutions by developing and using the latest technologies that thrive our resources to deliver industry-leading capabilities to our clients and customers, making it convenient for our clients to do business with InterSources Inc. Our teams also drive growth by refining technology-driven client experiences that put the users first, providing an unparalleled experience. This results in strengthening the core technologies of clients, enabling them to scale with flexibility, create seamless digital experiences and build lifelong relationships.