# Crystal Lemire

> Software Engineer @ Towns Labs | Building decentralized, permissionless communities

Location: Union City, California, United States
Profile: https://flows.cv/crystallemire

I’m a Software Engineer at Towns Labs (formerly HNT Labs), where I’ve contributed across core protocol, infrastructure, and production reliability. I built the protocol side of cross-chain asset evaluation, designed and implemented the platform’s Web2 bot service, and developed Postgres inspection and correction tools used to diagnose and repair state inconsistencies. I’ve also driven Datadog-based production investigations and delivered hotfixes to mitigate live network issues.

Previously at dYdX, I worked on the Go/Cosmos backend and the dYdX chain. I owned the oracle pricing module and prices daemon, reducing block rejections during volatile market conditions by over 80%. I also designed and shipped the delay-msg module supporting the Ethereum bridge for dYdX tokens, and contributed to the scalability and security of core backend services.

I hold a B.S. in Mathematical and Computational Science from Stanford University, with experience in research, high-performance computing, and mentorship. I’m motivated by building resilient distributed systems and using them to bring novel, paradigm-shifting experiences to users.

## Work Experience
### Senior Software Engineer @ Here Not There Labs
Jan 2024 – Jan 2025
I contributed to the development of decentralized communication solutions, achieving significant advancements in Ethereum protocols.  

• Built a node protocol for cross-chain verification, facilitating asset-based membership across popular chains.  
• Designed a web2 service for app registration and message forwarding, enhancing bot capabilities.  
• Developed Postgres data inspection tools, improving operational reliability for node operators.

### Software Engineer @ dYdX
Jan 2023 – Jan 2023
Built, deployed, and monitored dYdX chain, built with the Cosmos SDK.
- Owned oracle pricing module and prices daemon. The dydx protocol uses a non-deterministic algorithm for proposing and validating oracle prices. Built and deployed solution to reduce block rejections during periods of price volatility by > 85%, with a typical maximum of 1-2 consecutive rejected blocks.
- Built and deployed the delay-msg module, a module that stores transactions on the chain to be executed after a delay specified in number of blocks. This module currently supports the ethereum bridge for dydx tokens.
- built/deployed a health check mechanism for monitoring health of critical daemon services and deliberately crashing the protocol on failure.

### Senior Software Engineer @ Attentive
Jan 2020 – Jan 2023
Backend engineer on the Targeting team, which owns a collection of Tier 1 services responsible for helping customers send out tailored SMS messages to specific user segments. I focused on the product catalog and the user segmentation services.
Example projects:
Designed the initial multi-sharded approach for our product catalog service, then implemented library support in our jobs, ingestion pipelines, and services, and ran the migration. This design was later copied by our sister team.
Built support for computing and caching various types of segments based on user properties and events exposed across multiple data stores.
With a team of engineers, designed the next iteration of Attentive’s software engineering mentorship program, and menteed a mid-career full-stack engineer
With a team of recruiters, re-designed Attentive’s engineering rubric and evaluation process for software engineering interviews

### Software Development Engineer @ Amazon
Jan 2017 – Jan 2019 | Austin, Texas Area
Full-stack software engineer providing additional support with DevOps, deployment, and Quality Assurance
Spearheaded team-wide creation of high-quality artifacts like design docs and well-documented, maintainable code by mentoring others through the design doc and code review process
Co-designed, built,  and launched the next generation of BannerX, an application for creating retail-quality ads on amazon using NodeJS on Lambda, interactions with DynamoDB, S3, and Redshift.
Co-designed, built and launched LabelMaker, a CRUD webapp and API to easily label and query marketing metadata, using Node.js / Express / Java / Dynamo / Redshift / Fargate / RESTful API.

### Junior Software Engineer @ Google
Jan 2015 – Jan 2016 | Mountain View, California
Implemented features in various MySQL-compliant branches to provide five 9 of availability for MySQL services for internal customers within Google, such as Youtube
Designed and implemented management RPC interface and monitoring/metric interface for the Ripple project, a log server that forwards binary logs between master and slave MySQL servers.
Modified MySQL server to start without SSL certs and dynamically load them and encrypted temporary files.


## Education
### Graduate Studies in Computer Science
Stanford University

### B.S. in Mathematical and Computational Science
Stanford University


## Contact & Social
- LinkedIn: https://linkedin.com/in/crystal-lemire

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Source: https://flows.cv/crystallemire
JSON Resume: https://flows.cv/crystallemire/resume.json
Last updated: 2026-03-29