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Soren Lindqvist

Systems Programmer • Storage Engines • Real-time Audio DSP • Stockholm, Sweden

Hi there. I build low-latency distributed storage systems and real-time audio computation tools. My daily work revolves around systems programming in Rust and modern C++, zero-copy Linux kernel I/O via io_uring, and deterministic finite-state machines.

When I am not profiling cache misses or designing write-ahead logs, you can find me experimenting with modular analog synthesizers, roasting small-batch Ethiopian coffee, or riding gravel bikes across northern Scandinavian trails.

🛠️ What I Do

High-Throughput Storage Engines: Designing LSM-tree key-value stores, write-ahead logs (WAL), and lock-free memory allocators.
Kernel I/O & Networking: Exploring io_uring, kernel-bypass packet paths, and eBPF-based latency observability.
Digital Signal Processing (DSP): Implementing SIMD-accelerated physical modeling algorithms for acoustic wave propagation.
Reliability & Formal Models: Validating distributed consensus protocols (Raft) and deterministic concurrency testing.

📂 Featured Open-Source Projects

1. `aether-db`

An embedded, persistent LSM-Tree storage engine written in Rust with direct asynchronous io_uring disk I/O.

Focus: Zero-copy deserialization, lock-free memtable using skip-lists, and append-only commit logs.
Tech Stack: Rust, io_uring, Linux AIO, SIMD bit-packing
Design Rule: Zero dynamic heap allocations in the critical write path.

2. `pulse-dsp`

Real-time physical modeling acoustic engine for spatial audio synthesis and room impulse simulation.

Focus: Multi-channel wave equation solver running at 96kHz / 24-bit with under 1.8ms buffer latency.
Tech Stack: C++20, AVX-512 / NEON intrinsics, CMake, PortAudio

3. `trace-tap`

Minimalist eBPF probe for tracking Linux socket buffer bloat and kernel TCP queue turnaround times.

Focus: Ultra-low overhead (<0.4% CPU penalty) observability for high-frequency trading and streaming nodes.
Tech Stack: C, eBPF / libbpf, Zig, Linux Tracepoints

4. `nord-vibe`

CLI workspace tool that synchronizes color schemes, font ligatures, and layouts across Neovim, Tmux, and Alacritty.

Tech Stack: Go, Unix Domain Sockets, TOML

💻 Technical Stack & Environment

Programming Languages

Tier	Languages	Primary Context
Daily Production	Rust, C++20, C	High-throughput storage engines, audio DSP kernels, eBPF
Tooling & Services	Go, Python, Zig	Custom build tooling, data pipelines, benchmark suites
Scripting & Systems Tooling	Fish, POSIX Shell, Bash	System bootstrapping, test rigs, kernel parameter tuning

Systems & Architecture

Domain	Technologies & Standards
Kernel & OS	Linux (Arch / Debian), `io_uring`, `epoll`, eBPF, cgroups v2, hugepages
Protocols & RPC	QUIC, gRPC, Protocol Buffers, FlatBuffers, Cap'n Proto, WebSocket
Data & Consensus	Raft consensus, LSM-Tree, WAL, RocksDB internals, SQLite, PostgreSQL
Concurrency Models	Lock-free ring buffers, RCU (Read-Copy-Update), Actor pipelines, SPMC/MPSC

Daily Workspace

Host OS        : Arch Linux (Kernel 6.x, zen patchset)
Terminal       : Alacritty + Tmux
Editor         : Neovim (Native LSP, Lua, Treesitter)
Shell          : Fish shell with starship prompt
Build Tools    : Cargo, CMake, Ninja, Make
Hardware Rig   : AMD Ryzen 9 7950X, 64GB DDR5 ECC, PCIe 4.0 NVMe RAID-0
Audio Work     : RME Babyface Pro FS, Custom 48HP Eurorack modular synth

📈 Engineering Philosophy

Correctness Before Cleverness: Fast code that returns corrupted data is useless. Prove invariants with property tests and fuzzing first.
Mechanical Sympathy: Understand CPU caches, branch predictors, page tables, and memory bus bandwidth. The hardware is not an abstract theory.
Deterministic Testing: Random simulation with seedable state machines exposes concurrency race conditions faster than weeks of production testing.
Minimal Dependencies: Every third-party crate or library added is a maintenance tax. Rely on well-tested standard interfaces whenever possible.

📚 Currently Reading & Exploring

Designing Data-Intensive Applications by Martin Kleppmann (storage engine internals)
Formal verification of lock-free data structures using TLA+
Low-power audio DSP on ARM Cortex-M7 microcontrollers

📬 Get in Touch

GitHub Discussions: Feel free to open a topic on any of my repositories.
Email: soren.lindqvist.dev@proton.me
PGP Fingerprint: 9B4F 3E21 78C6 A10D 5E42 F098 32D1 8A7B 64C2 11E9
Location: Stockholm, Sweden (UTC+1 / CET)

Maintained by Soren Lindqvist • Systems & Audio DSP

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