Posted: 03/27/2026 Employment Type: Contract Job Number: 31605 Job Location: Onsite Industry: MDEV - Medical Device

Job Description

Job Title: Software Development Engineer 5

Position Description: Protingent Staffing has an exciting contract Software Development Engineer 5 with our client located in Sunnyvale, CA.

Job Description:

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.

Job Responsibilities:

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 close.

Job Qualifications:

Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field
10+ years of software engineering experience, with 5+ years focused on IoT systems architecture.
Deep expertise in C++ & Python for system-level software development
Strong MQTT expertise — broker configuration, QoS levels, topic design, retained messages, MQTT 5.0 features
Solid understanding of pub/sub and RPC messaging patterns, including how to implement reliable RPC over pub/sub protocols
Working knowledge of AWS microservices (EC2, S3, and adjacent services);
Ability to design cloud-side components supporting device connectivity
Strong grasp of network security fundamentals: TLS/mTLS, PKI, certificate management, and authorization patterns for IoT devices
Proven ability to produce high-quality architecture documentation — ADRs, design specs, interface definitions
Excellent communication skills; able to lead design discussions and drive alignment across technical and non-technical stakeholders
Quality-first engineering mindset: writes clean, well-documented, maintainable code that teammates can own after the engagement ends
Able to work independently and manage technical ambiguity with minimal guidance.

Nice To Have:

Experience in regulated or safety-critical industries (medical, aerospace, industrial) — valued but not required
Background in asynchronous, event-driven, and multi-threaded system design
Familiarity with FMEA or software risk analysis processes
Familiarity with cloud observability and operational monitoring tooling (e.g., AWS CloudWatch)
Strong industry experience in architecture and development of scalable, production-quality systems.

Job Details:

Job Type: Contract
Pay Rate: $85 - $93 an hour
Location: Sunnyvale, CA (5 days onsite)

Benefits Package: Protingent offers competitive salaries, insurance plan options (HDHP plan or POS plan), education/certification reimbursement, pre-tax commuter benefits, Paid Time Off (PTO), and an administered 401k plan.

About Protingent: Protingent is an Award-Winning provider of top-tier Engineering and IT talent, trusted by companies at the forefront of innovation — from Software and Aerospace to AI, Clean Tech, Medical Devices, and Connected Technologies. We’re passionate about making a positive impact by connecting exceptional talent with meaningful opportunities and helping our clients build the future.

Meet Your Recruiter

Arpita Khuntia

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