resume.tex

%% Md Shofiqul Islam – Universal CV (kernel-medical.github.io/resume.pdf)
%% Public version – employer names anonymised for NDA compliance
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% ── HEADER ────────────────────────────────────────────────────────────────────
\noindent{\color{accent}\rule{\linewidth}{2.5pt}}
\begin{center}
  \vspace{6pt}
  {\Huge\bfseries Md Shofiqul Islam}\\[7pt]
  {\normalsize\bfseries Embedded Linux \enspace|\enspace IIO Kernel Driver Author \enspace|\enspace ARM SoC \enspace|\enspace Zephyr RTOS \enspace|\enspace Medical Device Software}\\[6pt]
  {\small Espoo, Finland \enspace|\enspace Finnish Permanent Residence Permit \enspace|\enspace Open to Europe and Ireland}\\[4pt]
  {\small
    \href{mailto:shofiqtest@gmail.com}{shofiqtest@gmail.com} \enspace|\enspace
    \href{https://www.linkedin.com/in/mdshofiqul/}{linkedin.com/in/mdshofiqul} \enspace|\enspace
    \href{https://github.com/kernel-medical}{github.com/kernel-medical} \enspace|\enspace
    \href{https://lore.kernel.org/all/?q=Md+Shofiqul+Islam}{lore.kernel.org}}
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% ── PROFESSIONAL SUMMARY ──────────────────────────────────────────────────────
\section{Professional Summary}

Embedded Linux engineer with \textbf{5+ years of professional experience} building production-quality ARM firmware, HAL-level device drivers, and real-time software for mission-critical SoC platforms, combined with active upstream Linux kernel contributions across 8 subsystems. Author of the upstream Linux kernel IIO driver for the Maxim/ADI MAX86150 ECG and PPG biosensor (under active review by Jonathan Cameron, IIO maintainer) and the first upstream driver for the TI ADS1299 8-channel 24-bit EEG/EMG ADC. Zephyr RTOS driver merged into mainline. Python test automation and CI/CD background from regulated embedded projects. Biomedical Engineering background providing direct understanding of medical device signal chains and safety-critical software quality requirements. Eligible to work across the EU without visa sponsorship.

% ── TECHNICAL SKILLS ──────────────────────────────────────────────────────────
\section{Technical Skills}

\begin{itemize}
  \item \textbf{Embedded C/C++:} HAL and register-level device driver development for ARM Cortex-M/A; bare-metal and RTOS firmware; memory-mapped I/O, ISRs, DMA control; Linux kernel coding standards
  \item \textbf{Linux Kernel:} IIO, net-next, ASoC, XFS, SCSI, DRM/Accel, power supply, SoC subsystems; regmap, kfifo, DMA-safe buffer design; interrupt-driven triggered buffers; Device Tree bindings; 15 accepted upstream patches
  \item \textbf{RTOS \& Real-Time:} Zephyr RTOS; interrupt-driven data pipelines; race condition analysis; spinlocks, mutexes, semaphores; deterministic execution under hard real-time SLAs
  \item \textbf{Sensor \& Converter Interfaces:} I2C, SPI, UART at register level; 24-bit precision ADC interface (MAX86150 ECG/PPG, ADS1299 EEG/EMG, MAX30101/MAX30102 pulse oximetry); FIFO management; DMA-safe burst reads
  \item \textbf{Platform \& Build:} Yocto/Bitbake cross-compilation for ARM; Linux kernel build and configuration; Docker; cross-toolchain management
  \item \textbf{Debug:} GDB/KGDB, JTAG/SWD, ftrace, perf, tracepoints; static analysis (sparse, smatch, checkpatch); root-cause analysis of kernel panics, NULL dereferences, and interrupt races
  \item \textbf{Test \& CI/CD:} Python and Robot Framework test automation; GitHub Actions; unit and integration test plan design; automated regression detection
  \item \textbf{Languages:} C (expert); C++17/20; Python (senior, automation); Bash
  \item \textbf{Medical Device:} IEC 62304 Class B software lifecycle; biosignal acquisition pipelines; ROS 2 integration for medical robotics; DSP for biomedical signals
  \item \textbf{Tools:} Git, GDB, JTAG, Docker, GitHub Actions, Gerrit, Jira, Agile/Scrum
\end{itemize}

% ── WORK EXPERIENCE ───────────────────────────────────────────────────────────
\section{Work Experience}

\job{SoC Software Engineer}{Mar 2023 -- Present}{Nokia, Espoo, Finland}
\begin{itemize}
  \item Linux kernel LTS upgrades and BSP maintenance for Nokia legacy 5G SoC platforms;
    Yocto/OpenEmbedded layer management and CI/CD regression pipeline ownership.
  \item Embedded C and C++ development for Nokia 5G L1 radio platform: real-time signal
    processing, hardware integration, and driver-level implementation.
  \item Embedded C development for Nokia \textbf{5G and 6G ASIP platforms} using
    \textbf{Synopsys development tools}: driver implementation and hardware integration
    for application-specific instruction-set processors.
  \item Designed and implemented a \textbf{C library for 5G and 6G channel estimation
    algorithms} used in interference cancellation development --- full ownership from
    requirements through integration.
  \item \textbf{Technical authority} for interface specifications between SoC hardware,
    firmware, and software subsystems; led formal design reviews and change control
    across global engineering teams.
\end{itemize}

\vspace{4pt}

\job{Software Development Engineer (RF/L1)}{Mar 2022 -- Mar 2023}{Nokia, Oulu, Finland}
\begin{itemize}
  \item Embedded C++ development for Nokia 5G L1 radio signal processing platform.
  \item \textbf{Wind River Linux and VxWorks} middleware adaptation and integration
    for hard real-time 5G L1 processing on ARM SoC platforms.
  \item Yocto/OpenEmbedded meta layer development and maintenance for L1 radio
    platform targets; hardware-software integration and verification.
  \item Real-time embedded software development under hard real-time scheduling
    requirements; performance regression analysis with perf and ftrace.
\end{itemize}

\vspace{4pt}

\job{Software Test and Automation Engineer}{Sep 2021 -- Feb 2022}{Etteplan, Tampere, Finland}
\begin{itemize}
  \item Python and Robot Framework automated test suites for regulated embedded customer projects; requirements traceability; CI pipeline integration.
\end{itemize}

\vspace{4pt}

\job{Master's Thesis Worker}{Jul 2018 -- Dec 2018}{Sooma Medical, Helsinki, Finland}
\begin{itemize}
  \item DSP-based electrical field modelling pipeline for clinical brain stimulation planning in a regulated medical device environment.
\end{itemize}

% ── OPEN SOURCE CONTRIBUTIONS ─────────────────────────────────────────────────
\section{Open Source Contributions}

\noindent\textbf{Linux Kernel IIO} --- MAX86150 ECG and PPG Biosensor Driver \hfill
  {\small\href{https://lore.kernel.org/linux-iio/20260707112714.2261727-1-shofiqtest@gmail.com/}{lore.kernel.org/linux-iio}}
\begin{itemize}
  \item Production-quality IIO driver for the Maxim/ADI MAX86150 integrated ECG and PPG biosensor: I2C/regmap, 32-entry FIFO, DMA-safe 24-bit burst reads, interrupt-driven triggered buffer, power management, Device Tree bindings. Diagnosed and fixed two kernel panic scenarios: NULL dereference race on \texttt{active\_scan\_mask} and stale interrupt status race causing spurious FIFO reads. Submitted v7; under active review by IIO maintainer Jonathan Cameron.
\end{itemize}

\vspace{3pt}
\noindent\textbf{Linux Kernel IIO} --- ADS1299 8-Channel 24-bit EEG/EMG ADC Driver \hfill
  {\small\href{https://lore.kernel.org/linux-iio/}{lore.kernel.org/linux-iio}}
\begin{itemize}
  \item First upstream Linux kernel driver for the TI ADS1299 precision 8-channel 24-bit biopotential ADC: SPI/regmap, continuous data conversion, DMA-safe burst reads, interrupt-driven sampling, Device Tree bindings. Submitted v2 July 2026.
\end{itemize}

\vspace{3pt}
\noindent\textbf{Zephyr RTOS} --- MAX30101/MAX30102 Pulse Oximeter Driver \hfill
  {\small\href{https://github.com/zephyrproject-rtos/zephyr/pull/108697}{PR \#108697 -- merged}}
\begin{itemize}
  \item Complete sensor driver merged into Zephyr RTOS mainline: I2C, interrupt-driven triggered sampling, Devicetree bindings, Kconfig, CI. Reviewed by Intel and Nordic Semiconductor maintainers.
\end{itemize}

\vspace{3pt}
\noindent\textbf{Linux Kernel} --- Multi-subsystem Patches \hfill
  {\small\href{https://lore.kernel.org/all/?q=Md+Shofiqul+Islam}{lore.kernel.org}}
\begin{itemize}
  \item 15 patches across IIO, net-next, ASoC, XFS, SCSI, DRM/Accel, power supply, and SoC subsystems; reviewed and accepted by maintainers at Intel, Microsoft, Red Hat, and Linaro.
\end{itemize}

% ── EDUCATION ─────────────────────────────────────────────────────────────────
\section{Education}

\job{Master of Health Sciences (M.H.Sc.) in Biomedical Engineering}{2016 -- 2021}{University of Oulu, Finland}\\
Specialisation: Biomechanics and Imaging. DSP, medical device hardware-software interfacing, safety-critical system design. Thesis: DSP electrical field modelling pipeline for clinical brain stimulation at a Finnish medical device company.

\vspace{4pt}
\job{Master of Science (M.Sc.) in Computer Science and Engineering}{Jan 2014 -- Dec 2015}{Islamic University, Bangladesh}

\vspace{4pt}
\job{Bachelor of Science (B.Sc.) in Electrical and Electronics Engineering}{Oct 2008 -- Feb 2013}{International Islamic University Chittagong (IIUC), Bangladesh}

% ── CERTIFICATIONS ────────────────────────────────────────────────────────────
\section{Certifications}

Linux for Engineers -- The Linux Foundation \quad|\quad
Introduction to RISC-V (LFD110) -- The Linux Foundation \quad|\quad
Generative AI and Large Language Models -- Coursera

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