Alexey Zaytsev

AI/ML Engineer & Systems Architect

Full-stack ML engineer specializing in generative AI, distributed inference, and model fine-tuning. Combines first-principles deep learning with low-level systems and hardware engineering.

//Relevant Skills

Core ML
Python, PyTorch, JAX, CUDA, Transformers, Diffusion Models, Computer Vision, Autograd, CLIP, Embeddings, Weights & Biases
Applied AI
LLM Agents, vLLM, Hugging Face, LangChain, RAG, Fine-tuning, LoRA, Stable Diffusion, Vector Databases, Vercel AI SDK, MCP
Full-Stack & Platform
SvelteKit, TypeScript, FastAPI, PostgreSQL, Tailwind CSS, SQLAlchemy, Drizzle ORM, Docker, Linux, AWS, GitHub Actions, Supabase, Vercel, CloudFlare, S3

//Education

Université Denis Diderot

2013 - 2015
M.Sc. Systems and Synthetic Biology

LETI University

2003 - 2009
Specialist, Computer Security

//Languages

English Professional
Russian Native
Ukrainian Elementary

//Featured Projects

lovely-tensors 1.4k ★ / numpy/ jax Python, PyTorch, NumPy, JAX

Tensors for human consumption. Widely adopted by AI researchers.

tidygrad Python, NumPy, Autograd

From-scratch autograd engine, enough to train a tiny GPT-2 style model.

congusto-chat SvelteKit, TypeScript, PostgreSQL, Vercel AI SDK

Open-source multi-provider chat interface, similar to OpenWebUI and t3chat.

lovely-docs SvelteKit, TypeScript, Python, LLM, MCP

AI-native documentation dehydrator for agentic access. CLI, web UI, and MCP server.

pelican SvelteKit, TypeScript, PostgreSQL, Vercel AI SDK

LLM-driven SVG/ASCII art generation gallery with iterative visual refinement.

latent-tools Python, PyTorch, ComfyUI, Diffusion Models

Custom ComfyUI nodes for fine-grained diffusion latent manipulation.

nvml-tool C, NVML, CUDA, Linux

GPU power and fan control utility built on NVIDIA NVML.

//Experience

AI/ML Engineer (Consulting)

July 2024 - Present

Select client engagements: • AI Storyboarding Platform (Python backend): Integrated new image generation providers and refactored the generation abstraction layer across use cases (assets, scenes, inpainting). • Earnings Call Analysis & CEO Training: Engineered a low-latency transcription + LLM pipeline (AWS Transcribe / Deepgram) with speaker diarization and financial metrics extraction. Built a companion CEO training module that simulates analyst Q&A via TTS, transcribes spoken responses, and scores both content quality and delivery (WPM, filler words). • Open-source AI projects: congusto-chat, lovely-docs, pelican, latent-tools, nvml-tool.

Python · LLM Pipelines · AWS Transcribe · Deepgram · Speaker Diarization · TTS · Latency Optimization · Applied AI

Generative AI Lead

Nov 2023 - July 2024
io.net

Led development of the generative AI platform supporting image, video, and 3D model generation. Served tens of thousands of users, generating hundreds of thousands of images: • Architecture & Inference: Built an end-to-end generation pipeline. The frontend talked to the backend that talked to Supabase/PostgreSQL, which queued tasks via RabbitMQ. Distributed GPU workers picked up the jobs, generated the media, uploaded to S3 (served via CloudFront+imgproxy), and pinged a backend webhook, which finally streamed updates to the client via Server-Sent Events. • Model Fine-tuning: Extensive work with Stable Diffusion inference, custom model fine-tuning, and LoRAs to optimize generation quality and capabilities. • Custom NSFW Detector: Trained and deployed an EfficientNet classifier to replace off-the-shelf filters with high false-positive rates, reaching production-grade precision directly in the distributed GPU worker pipeline. • MLOps & DevOps: Orchestrated and scaled the distributed inference infrastructure.

Stable Diffusion · PyTorch · RabbitMQ · PostgreSQL · Supabase · LoRA · EfficientNet · MLOps · SSE · S3

AI/ML Engineer (Consulting)

Nov 2022 - Nov 2023

Independent consulting focused on AI applications and prototypes. Select engagements: • Dog Finder: An experimental missing-dog app exploring both facial recognition and noseprint uniqueness. Trained EfficientNet with triplet loss. • SAT Practice Generator: A dynamically updating test prep system seeded by real data. Built with Streamlit, Airtable, and OpenAI LLMs-migrating from GPT-3.5 to GPT-4 largely solved our initial correctness and consistency struggles. • GPTEditor: An AI-assisted copywriting tool-like Cursor, but for prose. Users highlight a paragraph and instruct the LLM on how to rewrite it. Built with SvelteKit, Tiptap, and Supabase.

SvelteKit · OpenAI API · RAG · Supabase · Streamlit · TypeScript · Vector DBs · PyTorch · Computer Vision

Electronics Engineer

Dec 2018 - May 2020
Okra Solar- Canberra / Phnom Penh / Shenzhen

Smart solar grid tech: designed the main grid hub (Solar → Battery → regulated DC loads and high voltage sharing), a debugging adapter, and auxiliary internal boards. Schematics, PCB design, DC-DC converters and analog monitoring circuits. Led a small hardware team (3 engineers).

Analog Electronics · Power Electronics · Maximum power point tracking · KiCad
3D render of an early Okra power board with screw terminals and USB connectorsAssembled Okra Edamame power board with large inductors, power terminals, and control electronicsTop-side PCB render of the Cicada 2G communications board with cellular module slotTop-side PCB render of the Okra display board with screen and push buttonsDetailed PCB render of the Edamame main power board for battery, load, solar, and grid connections3D render of the Cicada 4G modem board with antenna and GPS connectors3D CAD render of an early Okra system board assembly with daughterboards and large capacitors

Electronics and Prototyping Engineer

Sept 2016 - Dec 2018
Self-employed- Shenzhen, China

Dozens of client projects across digital, analog, and power electronics - from initial concept to production-ready designs and manufacturing oversight. Clients in medical devices, scientific instruments, food and consumer electronics. Designed and set up end-of-line automated testing, trained factory workers, and oversaw manufacturing in Shenzhen factories.

Digital Electronics · NFC · E-Ink · Bluetooth Low Energy · Sub-1G radio · Embedded systems · Power electronics · Motor controller · Synchronous rectification · DC-DC converters · Buck · Boost · LED display · Analog Electronics · Differential amplifiers · EKG · Electrostimulation · EEG · Electrowetting · Digital microfluidics · Autodesk Inventor · Fusion 360 · KiCad · Altium Designer
3D render of a compact controller PCB with button contacts and a central display footprintPrototype main control board with multiple power stages, connectors, and a daughterboard attached at the bottomSingle reader board prototype with a large printed sensing coil and flat-flex connectorsUpper board prototype with a barrel jack, motor and status connectors, and microcontroller circuitryMatching bottom board with USB connector, motor-control headers, and large mounting holesPCB render of a pulse generator test board with labeled outputs, control points, and wireless modules3D render of a slim battery charger board built around a small wireless module3D render of a cylindrical LED lamp assembly with capacitors mounted between two circular boards3D render of a single reader board with indicator LEDs, an analog front end, and a large square sensing areaFactory racks loaded with green PCBs drying or waiting after assemblyClose-up of a pulse generator test board covered with oscilloscope probes during bring-upSmall interface board with a Bluetooth module, USB input, and multiple output channelsCompact DC power board labeled for 9-75 V input with an inductor and two JST connectorsBattery-powered test fixture with many red banana jacks and a Bluetooth moduleMain prototype control board with labeled B, R, and C output terminals and a piggyback connector boardPrototype rig with multiple small boards mounted in an acrylic frame and connected to a shared controllerAnother view of the main prototype control board with large power components and terminal blocksMain board connected by a flat-flex cable to a separate single reader boardSingle reader board connected by ribbon cable, showing the square printed sensing coilUSB programmer board for a Bluetooth gateway communication board with an ESP-WROOM-32 moduleBottom board prototype photographed on a dark textured surface with USB, barrel jack, and motor-control connectorsBluetooth gateway power board powered over USB with dual USB-A outputs and electrolytic capacitorsCommunication board prototype with an ESP32 module wired into a display cable harnessBluetooth gateway power board placed beside loose surface-mount parts during assembly or debugging

CTO & Co-founder

Sept 2015 - Sept 2016
Koi.science- Paris / Shenzhen

EdTech startup providing affordable laboratory equipment for molecular biology education in schools. Designed spectrophotometer, electrophoresis and transilluminator - hardware, electronics, mechanical enclosures, and embedded software. Co-founded with fellow students from the CRI Paris program.

Electronics Engineering · Mechanical Engineering · Microcontrollers · Embedded programming · Autodesk Inventor · Fusion 360 · KiCad
DI-Lambda UNO spectrophotometer prototype with screen, buttons, and cuvette slotSubmersible spectrophotometer for live measurement of OD in bioreactorsExploded CAD view of the gene gun mechanical assemblyEarly enclosure prototype photographed inside a simple cardboard light boxBlack acrylic enclosure panels and components prepared for assemblyFinished DI-Lambda unit in retail packagingAssembled DI-Lambda spectrophotometer with interchangeable sensor modules laid out beside itExploded view of the DI-Lambda enclosure and module systemWorkers assembling batches of Koi science devices in a Shenzhen factorySmall production batch of assembled DI-Lambda units and front panels on a workbench

Research Intern

May 2015 - Sept 2015
Centre de Recherches Interdisciplinaires (CRI Paris)- Paris

Developed the first iteration of a low-cost, open-source spectrophotometer - the project that later evolved into the Koi.science startup.

Electronics Engineering · Mechanical Engineering · Embedded programming · Spectrophotometry · KiCad · Education outreach · Autodesk Inventor
Early benchtop prototype of the open-source spectrophotometer with cuvette holder and Arduino controllerLonger spectrophotometer prototype mounted on a wooden base with external controller boardOpen-source spectrophotometer connected to a laptop with sample cuvettes beside itTwo assembled spectrophotometer units with sample cuvettes for demonstrationSpectrophotometer kit shown with tubes, petri dish, gloves, and other lab consumablesPanoramic view of the CRI Paris laboratory workspaceMeasuring fluorescence in a bacterial culture, illuminated by a UV LED

Research Intern

May 2014 - Jan 2015
Institut Pasteur- Paris

Characterizing bacteriophage origin of replication region, exploring the potential of applying genetically engineered λ-phages to antibiotic-resistant bacterial infections in burn victims. Contributed to a published paper.

Bacteriophages · λ-phage · Staphylococcus Aureus · PCR · Plasmids · Molecular Biology · Electrophoresis · CRISPR-Cas9 · Bioinformatics · BioPython · High-throughput sequencing · Gibson Assembly
The experimental setupSchematic showing phage treatment reducing a mixed bacterial populationGel electrophoresis image of mecA PCR results across multiple plasmidsPetri dish image showing the effects on USA300-derived bacterial samplesBacterial culture viability decline after treatment

Research Intern

Jan 2014 - April 2014
Institut Curie- Paris

Researching the influence of electric fields on mammalian cell mobility and wound healing.

Microfluidics · Protein micropatterning · PDMS · Electrophoresis · Light Microscopy · Mammalian cell culture · Electronics prototyping

Sr. Software Engineer

June 2011 - July 2012
Nexenta Systems

Virtio drivers for network and block devices, general kernel maintenance, bugfixes and development on illumos (OpenSolaris fork).

Device drivers · Virtio · ZFS · Networking · Block storage · Solaris · C

Linux Kernel Engineer-Programmer

Jan 2005 - Jan 2010
AltEll and Protei ltdSaint-Petersburg, Russia

Linux kernel development for high-bandwidth telecom equipment. AltEll: 10 Gbps network routers. Protei: telephony over dedicated lines, WiMAX and GPRS/UMTS base stations. Device drivers, bootloaders, and board support packages on MIPS64, ARM and x86.

Device drivers · Bootloaders · Networking · ASIC · Board Support Packages · Linux Kernel · C · Assembly · ARM · MIPS · Intel XScale
Intel XScale is not going to be missed to be honestMy life back then