Staff Rust Developer · Systems / AI agent infrastructure

Bartłomiej
Kuras

Staff-level systems engineer specializing in turning underspecified, mathematically complex, or operationally demanding problems into dependable software. Deep expertise in Rust, distributed systems, blockchain, and Wasm; former engineering leader now working at the intersection of systems engineering and AI agent infrastructure.

Portrait of Bartłomiej Kuras
Wrocław, Poland
bartlomiej@kuras.online github.com/hashedone linkedin.com/in/hashedone hashedone.github.io

01 / Selected proof

Hard problems,
made tractable.

Analytical engineering · Credit Suisse

From numerical search to an O(1) closed-form solution

Reframed a numerical collateral-allocation routine as an analytically solvable optimization problem. Derived and proved a constant-time solution, validated it through parity testing against the source implementation, and improved numerical accuracy by removing approximation error.

Rust standard library · API design

Option as a zero-or-one slice

Contributed to the standard-library APIs Option::as_slice and Option::as_mut_slice, which let generic code view an optional value as an immutable or mutable slice with at most one element.

Open source · CosmWasm

Tools developers could build on

Created the Sylvia smart-contract framework, maintained cw-multi-test, and co-created CosmWasm Academy to turn ecosystem knowledge into reusable tools and training.

02 / Experience

Career record

2026 —
present

Current

Staff Rust Developer

SoftwareMill · part of VirtusLab Group

  • Contribute to Visdom, VirtusLab Group’s AI-native SDLC platform, with a focus on Rust systems engineering.
  • Previously designed and implemented a Rust runtime for executing custom indicators in a trading system.
2025

Head of Engineering

Phi Labs Ltd.

  • Owned the technical direction of Bolt Liquidity, spanning protocol design, mathematical foundations, product requirements, and delivery.
  • Led a team of up to five engineers while remaining active in implementation and code review.
  • Balanced near-term delivery with architectural integrity and deliberate technical risk management.
2023 —
2025

Engineering Manager

Confio GmbH

  • Led seven engineers and owned the roadmap for CosmWasm libraries, including cw-multi-test and the Sylvia framework.
  • Combined architecture and product ownership with hiring, onboarding, people management, and client communication.
  • Removed delivery obstacles while maintaining strong engineering standards and sustainable team practices.
2021 —
2023

Rust Smart Contract Developer

Confio GmbH

  • Developed Rust smart contracts for TGrade and collaborated on the Mesh Security initiative.
  • Conceived and built the Sylvia framework; maintained core CosmWasm tooling, including cw-multi-test.
  • Co-created CosmWasm Academy to teach developers how to build and test smart contracts.
2021

Rust Trainer

Sii

Designed and delivered a two-day Rust program for experienced C++ and Python developers, combining language fundamentals with hands-on work.

2020 —
2021

Rust Developer

GPW Tech

Built safety- and latency-critical components for WATS, a stock-exchange trading system, applying low-level optimization and carefully justified unsafe Rust.

2020

Rust Developer & Trainer

Luxoft

Developed components for a 5G Core network while preparing a C++ team to take ownership of Rust services through workshops, mentoring, pairing, recruitment, and code review.

2018 —
2019

Rust Developer

Anixe

Built backend systems for high-throughput hotel search and flexible pricing in Rust, working autonomously within tight hardware constraints.

2016 —
2018

C++ / Python Developer

Credit Suisse

Helped rewrite a credit-risk calculation engine, working on high-volume overnight processing, numerical correctness, and regulated financial calculations.

2015 —
2016

C++ Developer

Imagination Technologies

Developed a real-time SystemC GPU simulator used to test planned hardware and driver changes before physical silicon was available.

2014 —
2015

C++ Developer

DeLaval

Worked across PLC logic, hardware drivers, process control, and operator UI integration on a prototype rotary milking system.

2012 —
2014

C++ Developer

Nokia

Progressed from working student to mid-level developer in the BTS operations and maintenance domain, debugging fault recovery, logging, and network management behavior in a large codebase.