Harshal Patil
Embedded Software Engineer at Espressif Systems
Pune, Maharashtra, India
Summary
🤩
Rockstar🎓
Top SchoolHarshal Patil is an Embedded Software Engineer with six years of experience, currently working at Espressif Systems in Pune and specializing in IoT firmware and secure-boot workflows. He has contributed to high-profile Espressif open-source projects—improving bootloader security, deterministic ECDSA signing, HSM integration, and test infrastructure for esp-idf and esptool—demonstrating a strong focus on cryptographic robustness and testing. His background includes full-stack internship projects and leading large student teams to build event web and mobile platforms, reflecting an ability to move between low-level embedded security and product-facing software. Comfortable both shipping firmware-level fixes and building developer tooling, he blends pragmatic engineering with a security-first mindset and a knack for improving long-term maintainability.
6 years of coding experience
2 years of employment as a software developer
Bachelor of Technology - BTech (Hons.), Computer Engineering, Bachelor of Technology - BTech (Hons.), Computer Engineering at College of Engineering Pune
Github Skills (16)
ecdsa10
it-security10
esp3210
embedded10
mbedtls10
c-programming10
sys10
python10
cryptography10
boot10
security10
u-boot9
testing9
pkcs9
loader9
Programming languages (5)
Github contributions (5)
espressif/esp-idf
Sep 2022 - Jan 2023
Espressif IoT Development Framework. Official development framework for Espressif SoCs.
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:2 reviews, 34 commits, 1 PR in 4 months
Contributions summary:Harshal appears to be involved in the development of the Espressif IoT Development Framework, specifically focusing on the bootloader and security-related aspects. Their contributions include migrating unit tests related to protocomm, esp-tls, mbedtls, and app_update from the unit-test-app to the component-test-app, which suggests a focus on improving testing infrastructure. They also added support for deterministic ECDSA signature generation, and fixed issues related to key storage and memory corruption.
espressifdevelopment-frameworkesp-idfiotesp32
espressif/esptool
Nov 2022 - Jan 2023
Serial utility for flashing, provisioning, and interacting with Espressif SoCs
Role in this project:Security Engineer
Security EngineerContributions:3 reviews, 4 commits, 18 comments in 1 month
Contributions summary:Harshal primarily contributed to the security aspects of the `esptool` repository, specifically focusing on secure boot functionality. Their work involved adding support for pre-calculated signatures, enabling the use of external Hardware Security Modules (HSM) for signing, and integrating ECDSA-P384 signatures. They also implemented testing for the HSM interface and ECDSA signatures, and added warnings for potential security vulnerabilities.
bootloadersocserialespressif
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