// NEW YORK, NY
DANIEL CHROSTOWSKI
I build software from data ingestion and retrieval through evaluation and deployment. My current focus is making AI agents easier to measure, debug, and trust.
// BACKGROUND
I'm a New York-based software engineer working across AI, data infrastructure, and full-stack product development. Right now, I'm building AI-agent evaluation systems while shipping client platforms with Next.js, Django, and Cloudflare.
My AI work focuses on capturing execution traces, benchmarking workflows, and turning model behavior into evidence that can be inspected and compared. Earlier work includes on-chain data pipelines, Solidity vaults, and blockchain research infrastructure.
YEARS SHIPPING
STARTUP RUNS
GRAD GPA
// THE PIPELINE
// CLIENT & FREELANCE
Body of Clay
2026 — NOWFull-Stack Developer — Brooklyn, NY — Remote
- Built out the Next.js marketing site alongside the platform's lead developer: the hero, service-category pages, Why Us and FAQ, and a responsive nav system.
- Prototyped a working Instagram feed: a React UI component plus the Python/FastAPI service behind it, with token-refresh CLIs, encrypted token storage, and tests.
- Extended the Django REST API on a feature fork: refactored add-ons into their own data model with a migration that kept existing bookings intact, and shipped the service-categories endpoints.
Silver Fin Lodge
2026 — NOWWeb Developer & Brand Consultant — Roscoe, NY — Remote
- Solo-built the client's live site and admin CMS (Next.js on Cloudflare Pages, a D1/Drizzle data layer, Zero-Trust-gated CRUD), then ran the DNS go-live.
- Carried the brand end-to-end: logo and stylebook, digital signage, and campaign assets delivered to the client's commerce vendor.
- Launched the brand's first marketing site on WordPress/Elementor (page systems, mobile layouts, age-verification UX) before the Next.js rebuild.
DataAnnotation
2025 — NOWAI Data Annotator — New York, NY — Remote
- Evaluated LLM responses across multi-turn coding conversations, flagging anomalies and documenting edge cases to produce cleaner training data.
- Built and benchmarked 4+ Python/FastAPI test endpoints per task to produce comparable, data-driven model scores.
// STARTUPS
Lendvest
2024 — 2025Co-Founder & CTO — Remote, NY
- Shipped Solidity contracts for a leveraged fixed-term WSTETH loan product (vault, liquidation proxy, flash-loan leverage), wired to Chainlink Functions and Automation.
- Cut Ajna EMA-metric updates from 3.5 days to 42 minutes with a purpose-built ETL pipeline, tested at $95K+ TVL and backed by an Ajna Foundation grant.
- Designed a JavaScript→PostgreSQL ingestion pipeline normalizing on-chain event data for historical visualization and real-time analysis.
- Modeled SQL for 14-day rolling borrow/lend metrics with an overseas team, including fallback logic so the queries survived runtime failures.
Modelex.AI
2024Software Engineer — Remote, NY
- Automated the cost-benchmarking pipeline in GitHub Actions. Every run measured deployment and per-function execution costs, wrote them to CSV, and generated the plots and cost reports the team reviewed.
- Designed the benchmark to sweep the variables that actually moved cost (contract version, compiler optimization settings, target network), then layered historical token-price data on top so reports showed real cost instead of raw units.
- Built the React/ethers.js admin dashboard the team used to exercise the network: registering and staking compute nodes, minting prompt templates, and inspecting aggregated model responses.
Mango Mentors
2023 — 2024Mentor & Cohort Lead — New York, NY
- Led a mentee cohort in a CUNY/NYIT student-mentorship nonprofit, running Scrum standups, onboarding, and recruiting across web, database, and cybersecurity teams.
- Repurposed the NYC Node assistant into 'Mango Bot,' onboarding three mentee teams.
// UNIVERSITY & RESEARCH
CUNY Research Foundation
2023 — 2024Software Engineer (Part-Time) — Remote, NYAUG 2023 — JUL 2024
- Led development on NYC Node, the city's first public investment in blockchain infrastructure, unlocking $25K+ in milestones set by the EDC and funded by the Mayor's Office.
- Shipped a searchable block explorer with an AI assistant (OpenAI function calling behind an embedded Sendbird chat), featured by NYCEDC.
- Built an event-extraction pipeline with chunked queries, rate limiting, and multi-provider load balancing, processing ~70% of historical events for liquidity analysis.
Web & Mobile App Developer Intern — Queens College Tech Incubator — Queens, NYJUL — AUG 2023
- Built PromptMeister, a full-stack dApp minting AI-generated images as IPFS-backed NFTs: React frontend, Firebase Functions backend, and upgradeable OpenZeppelin contracts with Chainlink.
Stony Brook University — DoIT
2021 — 2022Student Technician — Stony Brook, NY
- Resolved classroom and office technology issues for a ~26,000-user campus, working in person, by phone, and in the field.
- Cleared 15–20 Cherwell service-desk tickets weekly, coordinating across departments for follow-up.
// SELECTED WORK
Body of Clay — Studio Platform
Production platform for a Brooklyn massage and skincare studio, built alongside its lead developer: a Next.js marketing site (started from scratch), an admin CMS, and a Django booking API. Work spanned all three repos, from service-category pages and an Instagram feed service to an add-ons migration that ran against live bookings without disturbing one. The studio takes bookings through it today.
Silver Fin Lodge
One client's marketing site, admin CMS, and brand system, built solo, translating a non-technical owner's requirements and coordinating with the POS vendor behind the brand's upcoming shop. Everything runs on Cloudflare, from the D1 database to the Zero Trust gate on the admin. Locations map, gallery, events, and a contact form with email delivery, all editable from the CMS; the site is the brand's permanent home and will funnel into the shop once it opens.
MemAgent
End-to-end LLM evaluation pipeline: agent execution traces captured as Neo4j graph data, an LLM-as-judge scoring those workflows against quality gates, and a human-in-the-loop labeling flow that turns agent runs into ground truth.
Atlas Intel
Agentic market-intelligence platform: ingests raw news and web data into a ~12K-record embedding/clustering dataset with hybrid pgvector + BM25 retrieval. A modular, containerized scheduler and API tools run on AWS Lightsail with Supabase Postgres; the LLM layer migrated from self-hosted Llama 3.1 to OpenAI via LangChain.
Lendvest Protocol
A fixed-term, leveraged loan product on WSTETH collateral. The vault carries the position and its term accounting, a liquidation proxy handles unwinds, and flash-loan leverage opens the levered position without staging capital up front. Chainlink Automation watches collateral; Chainlink Functions feeds the rate optimization.
DecentraWill
A CUNY Hunter College capstone built with a classmate: a decentralized inheritance dApp where a testator allocates ERC-20 holdings to beneficiaries behind a check-in deadline, and once it lapses beneficiaries claim their share on-chain. Led the Solidity contract side (Hardhat/Remix); React + ethers.js front end, Firebase auth and hosting.
PromptMeister
The final deliverable from the CUNY Research Foundation internship at Queens College's Tech Incubator: prompts become AI-generated images minted as IPFS-backed NFTs through an upgradeable OpenZeppelin contract. The network it deployed to has since been sunset; the app itself is still up.
// TOOLKIT
LANGUAGES
DATA / AI
SYSTEMS
// EDUCATION
Stevens Institute of Technology
2026 — NOWM.Eng. Applied Data Science
GPA 3.780 — Hoboken, NJ
COURSEWORK
- MA 574Foundational Mathematics for Data Science
- BIA 568Management of AI Technologies
- BIA 662Augmented Intelligence & Generative AI
- CS 559Machine Learning: Fundamentals & ApplicationsIN PROGRESS
CUNY Hunter College
GRAD 2025B.A. Computer Science, Math minor
New York, NY
// CONTACT
Have a project involving AI, data, or full-stack development? Tell me about it.
// SEND A MESSAGE