Mithril Interview Questions & Experiences

Mithril·Software Engineer·Onsite - Coding / Algorithms

Jul 2026

Round 2 at Mithril was a coding round with a single problem, and it was more approachable than I expected for this kind of company. The problem had a clear structure once you saw it for what it was.

Given a system with a set of states and allowed operations, determine whether there exists a sequence of legal operations that leads to a safe state without ever passing through an unsafe one.

“Basically a graph search problem dressed up in a bomb-defusing story.”

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Mithril·Software Engineer·Onsite - Coding / Algorithms

Jul 2026

Round 4 at Mithril was a debugging exercise, not an algorithm grind. They handed over a small GPU resource manager codebase with logs and failing tests and basically said: figure out what's broken and fix it.

Given a small codebase with failing unit tests and logs, identify and fix a bug in the GPU scoring logic where user preferences are not being compared correctly.
Debug a resource allocation and preemption failure caused by a missing GPU lease in the codebase.
Extend the preemption logic to sort candidates by GPU score before making preemption decisions.

“The fix itself was small but finding it took longer than I expected.”

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Mithril·Software Engineer·Technical Phone Screen

Jun 2026

Had a technical round at Mithril for a software engineer role. The main problem was building a parser for arithmetic and logical expressions that outputs operation triads, basically the same intermediate representation compilers use internally. Pretty niche problem and I wasn't fully prepared for how much ground it covered.

Design and implement a system that parses arithmetic and logical expressions into a sequence of operation triads (op, operand1, operand2), correctly handling operator precedence, associativity, and parentheses.

“I know enough about compilers to recognize three-address code but actually implementing a parser from scratch under pressure is a different story.”

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Mithril·Software Engineer·Onsite - System Design / Architecture

Jun 2026

System design round at Mithril for a software engineer role, focused entirely on designing a GPU resource allocation and job management service across a hybrid cloud setup. Pretty intense scope for a single session.

Design a service that allocates and manages GPU resources for ML training jobs across a hybrid cloud environment, where some GPUs are on-premises and some are in a public cloud.
What APIs would you expose for this system? Walk through submitting a job, checking its status, listing jobs, and canceling a job.
How would you model the data for jobs, users, and resource allocations in this system?
How would you handle failures, both at the node level and at the cloud provider API level, to keep jobs running reliably?
How would you ensure fairness across tenants and enforce per-user or per-team GPU quotas?
How would training code and data be stored and made available to the compute nodes where jobs actually run?
What would your observability setup look like for this system, and how would you expose logs and metrics to users?

“This was a lot to unpack.”

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Mithril·Software Engineer·Onsite - System Design / Architecture

Jun 2026

System design round at Mithril for a software engineering role. The whole thing was one big question about GPU resource management across hybrid cloud, and it went pretty deep pretty fast.

Design a system that manages and allocates GPU resources across a hybrid environment combining on-premises infrastructure and multiple public cloud providers. Your design should address GPU inventory and telemetry, multi-tenant scheduling with quotas, job queueing and preemption, fair-share and priority scheduling, fault tolerance, and cost-aware placement decisions.

“This was basically six questions disguised as one.”

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Mithril·Software Engineer·Technical Phone Screen

May 2026

Interviewed for a Software Engineer role at Mithril and got hit with a parsing problem that was way more involved than I expected. Had to build a mini compiler basically, tokenizing a small language and spitting out operation triads. Not your typical leetcode grind.

Given a list of lines from a small line-based programming language that supports assignment statements and non-nested if-else blocks, parse the input and produce a deterministic intermediate representation in operation triad form, using temporaries and labels as needed.

“This one took me a minute to even understand what they were asking.”

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Mithril·Software Engineer·Onsite - Behavioral / Leadership

Apr 2026

One round at Mithril for a Software Engineer role, focused entirely on cross-functional collaboration. Pretty behavioral, no coding.

Tell me about a project where you worked with cross-functional teams. How did you communicate requirements, cut down on unnecessary back-and-forth, and keep things moving?

“The async angle is what they're really probing.”

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Mithril·Software Engineer·Hiring Manager Screen

Apr 2026

Had a deep project review session with the department head at Mithril for a Software Engineer role. It was less of a technical screen and more of a dissection of everything you've ever shipped, which I wasn't fully prepared for.

Walk me through a major project you worked on: why it was built, the technical decisions made, what you specifically contributed, and what the outcome was.
What lessons did you take away from that project, and how did they change how you approach things now?

“This sounds like a standard 'tell me about a project' prompt but the department head kept drilling down.”

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