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Infrastructure Analyst at Pontotel. Licensed radio amateur, PU3IAR. Brazil.

isaklab.com · LinkedIn · Email · GitHub Sponsors

I work on cloud infrastructure: Kubernetes and Helm, CI/CD pipelines, infrastructure as code with Terraform, database administration, and observability with Sentry, Prometheus, and Grafana.

Outside of work I maintain open-source projects in cryptography, digital radio, and embedded systems. I write about them at isaklab.com.

Infrastructure  Kubernetes · Helm · Terraform · GCP · CI/CD · Prometheus · Grafana · Sentry
Languages       Python · Rust · Go · Fortran · C · JavaScript / TypeScript

Cryptography

Elliptic-curve cryptography implemented across Python, JavaScript, and Go, with an application built on it.

Project	Description
ecutils Python	ECC library: Diffie–Hellman and Massey–Omura key exchange, ECDSA signatures, Koblitz message-to-point encoding.
js-ecutils JS/TS	JavaScript/TypeScript port of ecutils for the browser and Node.js.
go-ecutils Go	Go port of ecutils.
e2hat JS	End-to-end encrypted web chat using elliptic-curve cryptography; encryption runs client-side, so the server cannot read or forge messages.

Radio and signal processing

Amateur-radio (PU3IAR) digital modes, modems, and SDR tooling.

Project	Description
tern Fortran	HF weak-signal digital mode with a channel-aware receiver: 16-FSK, Gauss–Markov (Kalman/RTS) channel smoothing, CRC-aided polar coding, and cross-frame combining; validated against an ITU-R F.1487 Watterson channel and cross-calibrated with WSJT-X FT8.
cdss Fortran	CHIRP-DSSS-Polar digital modem with soft-decision reception and iterative refinement.
radioplanbr HTML	RF coverage planning with Okumura-Hata, COST-231, ECC-33, Friis, and Ericsson models, including terrain and line-of-sight analysis.
sdrconnect Python	Library for SDR connectivity and raw IQ data collection.

Embedded and AVR

Toolchain for 8-bit AVR microcontrollers: language, compiler, emulators, and IDE.

Project	Description
ik8b Rust	Compiler from the ik language to Intel HEX firmware for AVR, with no external assembler, linker, or C runtime.
ikide Rust	Cross-platform IDE for ik8b: syntax validation, AVR simulation, and avrdude flashing.
ik8bvm Rust · avr-vm C	8-bit AVR CPU core emulators.
cyone-assembly Go	Assembly language targeting the Cyone Kernel on 8-bit microcontrollers.
avr-modular-system C	Modular firmware architecture for AVR.

AI and machine learning

Project	Description
iklab Python	Planning-first CLI agent powered by Granite 4.0-H-Tiny.
llama-model-converter Python	Converts Llama model weights to the Hugging Face format.

Open-source contributions

• PeerDB #4365 — fixed a ClickHouse normalization failure caused by case-sensitive handling of the _peerdb_is_deleted column. (merged)
• Mozilla bug 122752 — implementing SOCKS5 username/password authentication (RFC 1929) in Firefox's networking core. (in progress)

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_{Background in Mathematics (IFNMG – Januária, 2016–2023); currently studying IT Management (PUCRS, 2025–2028). If my open-source work has been useful to you, you can support its maintenance through GitHub Sponsors.}