Senior Backend Java Engineer (Chicago Hybrid)
Posted Jun 22, 2026 · We last checked this listing on Sep 20, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
Behavioral
Walk me through a time you owned the architecture for a large, distributed feature from proposal to production. What were the tradeoffs you had to sell to the team?
whether they can actually drive architectural decisions end to end, not just implement someone else's design
Tell me about a code review where you caught something serious, a security gap or a performance bottleneck, that others missed.
actual reviewing rigor and whether they can articulate specific technical judgment, not just process compliance
Describe how you've mentored a junior or mid-level engineer through a task that was too big for them to tackle alone.
real coaching ability versus just being the most senior person in the room
Tell me about a time a production incident in a high-availability system came down to something you hadn't anticipated. What did you change afterward?
whether they learn from failure and think about systemic prevention, not just firefighting
Technical
Say you need to support zero-touch enrollment for a sudden spike of devices registering at once, maybe ten times normal volume. How would you design the provisioning service to handle that without falling over?
depth of thinking on high-throughput, fault-tolerant provisioning architecture, which is the core of this platform
Tell me about the most demanding schema or indexing problem you've solved on a Postgres-family database under heavy concurrent read and write load.
real hands-on depth with Postgres/AlloyDB internals versus surface familiarity
AlloyDB is central to this role. What have you actually used it for, and where does it behave differently from vanilla Postgres in ways that changed your design?
honesty about AlloyDB-specific experience versus general Postgres knowledge
How would you design a service contract between a Java microservice and a Python microservice that need to stay in sync as both evolve independently?
contract-first API design skill and understanding of versioning and backward compatibility across language boundaries
Describe a time you used Claude or another large language model for something beyond a simple chatbot, like structured data extraction or log parsing. What broke first, and how did you fix your prompts?
whether their LLM experience is genuinely production-grade prompt engineering, not just casual API calls
What experience do you have running services on GKE and Cloud Run, and how did you decide which one fit a given workload?
practical GCP deployment judgment rather than checkbox familiarity with the platform
Situational
If you were asked to build a conversational provisioning assistant that lets support staff configure devices through natural language, what would worry you most about letting an LLM touch production configuration, and how would you guard against it?
judgment about safety, validation, and guardrails when giving an LLM real operational power
You get a set of vague requirements from product management for a new device lifecycle feature. Walk me through how you'd turn that into groomed, parallelizable technical stories for the team.
ability to translate ambiguous business asks into concrete, delegable engineering work
If PR review cycles were dragging the team down, what would you actually build or change to cut that time, and how would you know it worked?
practical experience with pipeline tooling like automated guardrails or AI coding assistants, and whether they measure outcomes
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As published by Motorola Solutions.
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