This role pays more than
99%
of similar roles. Most pay
$181,125–$246,150
— the shaded band above.
At the midpoint, this role pays about
$399k
versus about
$214k
for comparable roles.
Based on 240 similar postings.
Employer
About Block
Block, Inc. (formerly Square) is a financial technology company operating the Square merchant payments ecosystem, Cash App peer-to-peer payments, TIDAL music streaming, and Bitcoin-focused financial services. Industry: Financial Technology & Payments
Block currently has
221 open roles
on FindRole.
Listed pay typically runs
$189,000–$283,600
across 56 roles with salary data.
As a Principal Engineer at Block, you will join a world-class team of AI experts to design and deliver autonomous agents and agentic workflows that operate across Square, Cash App, and the broader ecosystem. Your daily responsibilities include architecting end-to-end solutions for real business value, integrating frontier LLMs into agent architectures, and optimizing model performance through fine-tuning and prompt engineering. You will also mentor engineers, collaborate with stakeholders to translate business objectives into technical deliverables, and foster a culture of excellence and rapid learning. The ideal candidate has over 15 years of experience in software engineering or machine learning, deep expertise in building autonomous agents at scale, and fluency in agentic system primitives such as context management and multi-step reasoning. Experience with model optimization techniques like fine-tuning and RLHF is a plus, as is familiarity with the challenges of agent evaluation and safety in production contexts.
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