Authors

Sashko Stubailo

Co-founder and CTO

Sashko is a co-founder and CTO of Flipturn, building the next-generation software platform for EV charging, energy, and the grid. Before Flipturn, Sashko was an engineering manager at Stripe leading Stripe Elements and Dashboard teams, and previously started and led the Apollo GraphQL open-source team.

Education

B.S. in Computer Science, Massachusetts Institute of Technology

Expertise

EV charging, software engineering, fintech

Articles

April 23, 2026

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Guide

How to manage access and payment at your EV chargers

An in-depth guide into all the methods of access control and payments that operators can set up for their EV chargers, whether running chargers at an apartment building, managing a fleet depot, or operating public stations on a highway.

Sashko Stubailo

Co-founder and CTO

April 13, 2026

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Product

Integrate EV charging into your systems with Flipturn's APIs

Flipturn's API lets you pipe charging alerts, sync RFID access lists, coordinate fleet schedules, and export usage data into the systems you already use.

Sashko Stubailo

Co-founder and CTO

January 30, 2026

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Company

Flipturn listed as Approved Solution Provider for PG&E Flex Connect, helping EV charging sites add capacity faster

Flipturn is an approved PG&E Flex Connect solution provider, helping EV charging sites unlock additional capacity before infrastructure upgrades are complete.

Sashko Stubailo

Co-founder and CTO

January 14, 2026

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Product

Flipturn launches AI charging operations agent

Meet Flip, Flipturn's new AI charging operations agent that monitors charger performance, identifies issues proactively, and reduces operational firefighting.

Sashko Stubailo

Co-founder and CTO

August 8, 2024

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Company

Flipturn is now SOC 2 certified

Flipturn has achieved SOC 2 Type I compliance, affirming our commitment to security and data privacy for operators who trust us with sensitive charging data.

Sashko Stubailo

Co-founder and CTO

April 16, 2024

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Product

Upgrade your Level 2 fleet charging with PIN codes

PIN codes add access control and cost tracking to Level 2 fleet chargers. Here is how to upgrade your charging setup without adding hardware complexity.

Sashko Stubailo

Co-founder and CTO

March 25, 2024

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Guide

Understanding OCPP statuses

OCPP is the protocol EV chargers use to communicate with management software. A plain-language guide to OCPP statuses and what each one means for operators.

Sashko Stubailo

Co-founder and CTO

February 27, 2024

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Guide

Measuring uptime and reliability for fleet EV chargers

Charger uptime is critical for EV fleet operations. Here is how to measure reliability accurately, what good benchmarks look like, and how Flipturn tracks it.

Sashko Stubailo

Co-founder and CTO

February 8, 2024

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Product

Feature release: open access to OCPP logs

Flipturn now provides open access to raw OCPP logs, giving technical operators and charging veterans direct visibility into charger communication data.

Sashko Stubailo

Co-founder and CTO

September 12, 2023

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Product

How to get the most detailed data from your fleet EV chargers

Detailed EV charging data helps fleets improve vehicle availability and reduce costs. Here is how fleet operators can get the most out of their charger data.

Sashko Stubailo

Co-founder and CTO

May 16, 2023

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Guide

How lowering peak power demand can reduce your EV fleet charging costs

Peak power demand charges are one of the biggest costs in EV fleet charging. Here is how fleet operators can reduce them to lower utility bills significantly.

Sashko Stubailo

Co-founder and CTO

March 7, 2023

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Industry

How temperature can affect your EV fleet operations

Temperature significantly affects EV range and battery performance. Here is what fleet operators need to know to plan routes and charging schedules year-round.

Sashko Stubailo

Co-founder and CTO

February 28, 2023

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Industry

How to estimate charging time and power for your electric vehicle

Not sure how long it takes to charge your EV or what kW and kWh mean? This guide breaks down how to estimate charging time and power for any electric vehicle.

Sashko Stubailo

Co-founder and CTO