01 / Home

Risk taker. Systems Thinker. Engineer. Builder. Speculator.

Selected work across engineering, markets and creative production.

2007–2014Engineering internships
2014–2017Structural Design
2017–2021Inspection
2021–PresentKasatka Research LLC

02 / Structural Design and Inspection

Zachar DavydovContact

Structural Design and Inspection

Seven years in New York building design and infrastructure inspection. Structural design for 30+ buildings.

Buildings

17 projects · listed by address

Google Maps Street View screenshot of 40-23 74th Street, showing a red-brick facade, projecting balconies and ground-floor storefronts.

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40-23 74th StreetStreet View

Street photograph of 152 Manhattan Avenue showing a dark-framed glazed corner, red-brick elevations and recessed ground-floor entrance.

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152 Manhattan AveExterior · 2017

Street photograph of 182 Malcolm X Boulevard showing the narrow gray-clad facade, a projecting balcony, rooftop railing and neighboring brick building.

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182 Malcolm X BlvdExterior · 2016

Street photograph of 264 Albany Avenue showing a light-colored facade, dark balcony railings, a warm-colored side accent and parked vehicles.

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264 Albany AveExterior · 2016

Street View photograph of a brick campus building with a tall central entrance, rows of dark-framed windows and The Friedman Family Campus lettering.

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323 Elmwood AveStreet View

Street View photograph of a four-story brick building with large dark-framed windows, a rooftop railing and a partially screened ground-floor opening.

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333 14th StStreet View

Construction-stage photograph of 346 13th Street showing a red-brick facade, tall windows with installation labels and green site fencing.

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346 13th StreetConstruction · 2017

Google Maps Street View screenshot of 406 Cornelia Street showing pale brick facing, stacked central balconies and a dark ground-floor exterior.

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406 Cornelia StStreet View

Construction-stage photograph of 489 Baltic Street showing a dark-brick facade, large vertical windows, boarded ground-floor openings and a blue sky.

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489 Baltic StConstruction · 2017

Street view of a red-brown brick building at 543 Brooklyn Avenue, with projecting balconies, black railings, and a pale ground-floor facade.

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543 Brooklyn AveExterior · 2016

Street view of 657 Quincy Street, showing a gray facade, warm brown balcony surrounds, tall windows, and the entry beside a neighboring brick building.

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657 Quincy StExterior · 2016

Three-quarter street view of 667 Myrtle Avenue, showing a broad brick facade, repeated black-railed balconies, glazed ground-floor openings, and neighboring buildings.

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667 Myrtle AveExterior · 2016

Street view of 1503 Jefferson Avenue during visible construction, showing a dark brick facade, central projecting balconies, window labels, and a green perimeter fence.

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1503 Jefferson AveConstruction · 2017

Angled street view of 1534 Putnam Avenue, with a gray-brick facade, four projecting balconies, a pink ground-floor finish, and construction barriers.

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1534 Putnam AveConstruction · 2017

Street View photograph of a broad brick building with green-painted balconies, rooftop railings and a stepped roofline above ground-floor entrances.

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2909 Tilden AveStreet View

Angled street view of the Gerry Street project, showing its brick facade, broad side wall, black balcony railings, and entry stoops.

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Gerry StExterior · 2017

Street View photograph of red-brick townhouses with raised front stoops, black railings and tall dark window bays beneath mature street trees.

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State Street TownhousesStreet View

17 projects · 31 selected images. Open an address to view the full gallery.

Inspection

2017–2021 · JUNMA Engineering

Bridges, tunnels, transit stations and viaducts. Selected inspection assignments and condition reporting.

16 AUG 2018 · Bridge inspectionJUNMA Engineering · New York ↗

Infrastructure

Verrazzano-Narrows Bridge

Main-span inspections covering deck elements, bearings, anchorages, suspension cables, tower components, and associated condition reports.

2018–2019 · Inspection & reporting

Infrastructure

Henry Hudson Bridge & tunnels

Inspected and rated structural elements across ten BINs, including the Queens-Midtown and Hugh L. Carey tunnels. Reconciled inspection records across databases.

2019 cycle · Inspection & repair documentation

Infrastructure

Broadway Junction Station

Led a six-person subcontractor team inspecting elevated and sub-grade stations. Coordinated three inspection reports, condition ratings, and repair documentation.

JUNMA Engineering · Team leadership

Infrastructure

Park Avenue Viaduct

Recorded 21 defect types across four tracks and up to 89 spans. Compared condition data against the 2015 baseline and reconciled multiple database formats.

JUNMA Engineering · Inspection & data analysis

Illustrative portfolio samples NOT FOR CONSTRUCTION

S-101 · Foundation plan

S-201 · Framing plan

S-501 · Connection details

Professional experience

Solomon RosenzweigStructural design · 2014–2017Steel, concrete, masonry & timber systems

JUNMA EngineeringInfrastructure inspection · 2017–2021Bridges, tunnels, transit & field-team coordination

View résumé

03 / Kasatka Research LLC

Zachar DavydovContact

Kasatka Research LLC

I develop market hypotheses and test them against historical data.

06 / 06 selected studies

BTC · 900 days post halving

06 OCT 2026 · Cycle study

Columbus Day · 2026 price action

13 OCT 2026 · Event study

Columbus Day · Historical scorecard

13 OCT 2026 · Historical outcomes

Columbus Day · Return & risk

13 OCT 2026 · Return and drawdown study

October confluence · Day 905

11 OCT 2026 · Cycle timing

October confluence · Midterm October

11 OCT 2026 · Seasonality

Original research pages. Select a report to read it at full size. Dates and findings belong to each report’s original publication.

Trading and Investing

Personal capital. Research put into practice.

+1,566%Cumulative return at peak

2017–2021Performance period

≈102%CAGR equivalent to peak

Self-reported performance managing personal capital during 2017–2021, measured at peak. The annualized equivalent assumes no external cash flows. These figures describe peak performance, not the current portfolio value. No audited return series is presented.

How I work

01Form a precise market hypothesis.

02Define the sample, timing, and comparison.

03Measure returns, drawdowns, and failure cases.

04Communicate the evidence and its limits.

Home Run Trades

Selected personal trades.

$BTC
July 2017–Infinity
$ETH
2017–2021
$LINK
2020
YASU
2020–2021
$SPELL
2021
Base season
2023
WIF
2024
SPX6900
2024–2025

04 / Theatre 51

Zachar DavydovContact

Theatre 51

Music, film and animation production through ZEETOX, T51 and ANN.

PLAY ANIMATION ↗

Animation

YouTube

Music, film & animation · ZEETOX · T51 · ANN

ZEETOX / Original music & videos

Original music, ANN reels and Shorts from Theatre 51.

24 VIDEOSView all