this repo has no description
cv: finished v1 version
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.claude/settings.local.json
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.claude/settings.local.json
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configuration.yaml
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configuration.yaml
···
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contacts:
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name: Tim Chmielecki
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title: Systems Engineer
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name: TYMEK CHMIELECKI
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title: SYSTEMS ENGINEER
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email: me@timchmielecki.com
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address: Krakow, PL
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location: Poland
···
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tagline: I am a systems engineer with a strong background in blockchain, cryptography, and P2P networking. Looking for a challenging role in backend engineering, with an interest in developing decentralized systems and solving scaling problems. In my spare time, I enjoy rock climbing, electronic/jazz music, and cooking.
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jobs:
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- position: Blockchain-focused Systems Engineer
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- position: Systems Engineer
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company:
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name: TokenTax
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link: "https://tokentax.co"
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description:
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- Implemented e2e testing for crucial internal services, ensuring accurate tax calculation results.
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- Reduced database size by 99% and significantly improved response times on internal APIs by creating a second-generation data parsing system.
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- Increased block parsing throughput by 3-5x by introducing concurrent programming and optimizing transaction parsing in our Go codebase.
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- Gained extensive knowledge of the go-ethereum codebase, maintained multiple forked cryptocurrency nodes, and managed Kubernetes-based block-data parsing infrastructure.
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from: "09.2021"
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to: "present"
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- Joined as an early engineer and took ownership of the EVM data ingestion pipeline, operating and tuning full nodes for Ethereum, Polygon (Matic), BSC, etc., and iterating on how we index on-chain data for tax reporting
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- Designed a wallet-centric sync pipeline using chain explorer APIs and batched checkpoints across all EVM chains, replacing our full-chain indexer, cutting storage by ~99% and increasing ingestion throughput ~3× while reliably syncing 2k+ wallets/day (up to 100k tx per wallet)
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- Built an end-to-end regression harness that diffs per-wallet outputs between old and new pipelines, enabling a safe migration with no changes to user tax outcomes
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- Became the main Go specialist on the accounting backend, ported the regression harness into the accounting service and then rewrote core internals to work around legacy design constraints, reducing memory usage by 60–70% while continuously verifying that user-level tax results remained identical
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- Proposed and co-designed a new account-based data model for movements to align with updated IRS rules, then worked with the app backend team to implement it end-to-end (auto-labeling accounts across heterogeneous sources and computing per-account, day-by-day running balances)
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- Since mid-2025, leading the entire syncing layer (not just EVM), sunsetting the legacy Go-based pipeline and porting protocol-specific parsing into the TypeScript codebase using a forked Goldrush decoder, while mentoring two junior engineers and reviewing PRs with a focus on data correctness and observability
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from: "September 2021"
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to: "Ongoing"
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location: New York, USA (Remote)
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- position: Backend and DevOps Engineer
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company:
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name: HID Global
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link: "https://www.hidglobal.com"
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description:
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- Developed smart-card authentication mechanisms based on Assa Abloy SEOS (THEBE research project)
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- Initiated experimental project to develop HSM emulator in a Docker container running in a TEE, authored a Go library to expose functionality with an API
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from: "06.2019"
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to: "09.2021."
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- "Proposed and built a software HSM: Go/cgo wrapper over a C++ crypto library, exposed as a secure network service and deployed in Docker on AWS Nitro Enclaves, providing a middle ground between hardware HSMs and an unsecured software process, plus contributions to smart-card auth based on Assa Abloy SEOS."
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from: "June 2019"
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to: "September 2021"
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location: Krakow, PL
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- position: Full-stack developer
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company:
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name: APCD Diffusion
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link: ""
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description:
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- Developed a network of Raspberry Pis with external displays, allowing to upload and schedule ad transmissions through a web app, using Go for the back-end, Bootstrap4 for the front-end, and Python for Raspberry Pi programming.
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from: "01.2018."
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to: "01.2019."
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- Developed IoT network of Raspberry Pis with Go backend, Bootstrap4 frontend, and Python embedded programming for digital advertising displays
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from: "Jan 2018"
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to: "Jan 2019"
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location: Paris, FR (Remote)
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- position: Volunteer computer science and mathematics teacher
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- position: Programming and Mathematics Tutor
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company:
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name: Local hobby group
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name: Freelance/Local groups
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link: ""
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description:
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- Taught programming, basic algorithms, and mathematics to students aged 10-18, helping them develop analytical thinking skills and prepare for future computer science studies and final exams.
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- Taught programming fundamentals to kids aged 10-15 and provided paid mathematics tutoring for middle/high school exam preparation
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from: "2017"
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to: "2021"
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location: Krakow, PL
···
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- Systems engineering and performance optimization
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languages:
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- name: Polish
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level: native
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- name: French
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level: 5
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note: native
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- name: Polish
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level: 5
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note: native
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level: native
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- name: English
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level: 5
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note: ""
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level: C2
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- name: Spanish
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level: A2
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- name: Dutch
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level: A1
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education:
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- place:
···
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from: "09.2018"
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to: "02.2022"
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location: Krakow, PL
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thesis: "Bachelor thesis: From-scratch implementation of the CryptoNote v2 ring-signature transaction scheme (basis of Monero)."
example.pdf
example.pdf
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example.typ
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example.typ
···
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#import "vantage-typst.typ": vantage, term, skill, language, styled-link
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#import "vantage-typst.typ": vantage, term, skill, language, styled-link, icon
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#let configuration = yaml("configuration.yaml")
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#vantage(
···
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== Experience
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#for job in configuration.jobs [
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=== #job.position #h(5pt) _#link(job.company.link)[#job.company.name]_ #h(1fr) #term[#job.from --- #job.to][#job.location]
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#for (idx, job) in configuration.jobs.enumerate() [
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#table(
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columns: (1fr, auto),
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stroke: none,
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inset: 0pt,
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column-gutter: 1em,
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row-gutter: 0.6em,
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[=== #job.position],
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align(left)[#text(9.5pt, fill: rgb("#555C65"))[#icon("calendar") #job.from --- #job.to]],
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[#text(9.5pt)[#if job.company.link != "" [#link(job.company.link)[#job.company.name]] else [#job.company.name]]],
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align(left)[#text(9.5pt, fill: rgb("#555C65"))[#icon("location") #job.location]]
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)
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#for point in job.description [
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- #point
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#if job.description.len() == 1 [
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#text(10pt, style: "italic", fill: rgb("#333333"))[#job.description.at(0)]
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] else [
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#for point in job.description [
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- #point
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]
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]
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#if idx < configuration.jobs.len() - 1 [
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#v(0.1em)
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#line(length: 100%, stroke: (paint: rgb("#D4DCE8"), thickness: 0.5pt, dash: "solid"))
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#v(0.1em)
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] else [
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#v(0.2em)
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]
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]
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],
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gridBelow: (
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[
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== Languages
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#for lang in configuration.languages [
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#language(lang.name, lang.level)
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]
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],
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[
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== Education
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#for edu in configuration.education [
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=== #if edu.place.link != "" [
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#link(edu.place.link)[#edu.place.name]\
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#link(edu.place.link)[#edu.place.name]
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] else [
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#edu.place.name\
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#edu.place.name
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]
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#text(10pt)[#edu.degree in #edu.major]\
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#text(9.5pt, fill: rgb("#555C65"))[#icon("calendar") #edu.from - #edu.to]
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#if "thesis" in edu [
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\
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#text(9.5pt, style: "italic", fill: rgb("#333333"))[#edu.thesis]
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]
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#edu.degree in #edu.major
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#term[#edu.from - #edu.to][#edu.location]
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]
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],
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[
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== Languages
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#for lang in configuration.languages [
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#language(lang.name, lang.note, lang.level)
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]
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],
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[
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== Skills/Exposure
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#set par(justify: false)
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#for skill in configuration.skills [
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• #skill
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- #skill
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]
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]
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)
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vantage-typst.typ
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vantage-typst.typ
···
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#let primary_colour = rgb("#5f89ad")
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#let secondary_colour = rgb("#81a2be")
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#let link_colour = rgb("#8abeb7")
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#let primary_colour = rgb("#244C74")
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#let secondary_colour = rgb("#244C74")
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#let link_colour = rgb("#3A5F8E")
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#let meta_grey = rgb("#555C65")
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#let icon(name, shift: 1.5pt) = {
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box(
···
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}
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#let findMe(services) = {
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set text(8pt)
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set text(8.5pt)
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let icon = icon.with(shift: 2.5pt)
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services.map(service => {
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icon(service.name)
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if "display" in service.keys() {
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if service.link == "" {
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if "display" in service.keys() {
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service.display
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}
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} else if "display" in service.keys() {
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link(service.link)[#{service.display}]
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} else {
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link(service.link)
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}
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#let term(period, location) = {
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text(9pt)[#icon("calendar") #period #h(1fr) #icon("location") #location]
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text(9.5pt, fill: meta_grey)[#icon("calendar") #period #h(1fr) #icon("location") #location]
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}
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···
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[\ ]
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}
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#let language(name, note, rating) = {
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let done = false
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let i = 1
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#let language(name, level) = {
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name
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emph(text(6pt)[ (#{note})])
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h(7fr)
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while (not done){
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let colour = rgb("#c0c0c0")
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let strokeColor = rgb("#c0c0c0")
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let radiusValue = (left: 0em, right: 0em)
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if (i <= rating){
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colour = primary_colour
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strokeColor = primary_colour
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}
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// Add rounded corners for the first and last boxes
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if (i == 1) {
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radiusValue = (left: 2em, right: 0em)
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} else if (i == max_rating) {
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radiusValue = (left: 0em, right: 2em)
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}
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box(rect(
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height: 0.3em,
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width: 1.5em,
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stroke: strokeColor,
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fill: colour,
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radius: radiusValue
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))
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if (max_rating == i){
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done = true
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}
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i += 1
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}
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h(1fr)
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text(9pt, fill: meta_grey)[#{level}]
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[\ ]
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}
···
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title: name + "'s CV",
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author: name,
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)
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set text(10pt, font: "SF Pro")
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set text(9.5pt, font: "Public Sans", weight: "medium", fill: rgb("#111111"))
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set par(leading: 0.65em)
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set page(
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margin: (x: 1.2cm, y: 1.2cm),
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)
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show heading.where(level: 1) : it => text(16pt,[#{it.body} #v(5pt, weak: true)])
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show link: it => text(fill: link_colour, it)
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show heading.where(level: 1) : it => text(18pt, weight: "extrabold",[#{it.body} #v(5pt, weak: true)])
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show heading.where(
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level: 2,
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): it => text(
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12pt,
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weight: "bold",
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fill: primary_colour,
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[
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#{it.body}
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#{upper(it.body)}
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#v(-7pt)
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#line(length: 100%, stroke: 0.5pt + primary_colour)
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]
···
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show heading.where(
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level: 3
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): it => text(fill: secondary_colour, it.body)
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): it => text(11pt, weight: "semibold", fill: secondary_colour, it.body)
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show heading.where(
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level: 4
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): it => text(
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10.5pt,
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weight: "semibold",
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fill: primary_colour,
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it.body
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)
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[= #name]
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text(11pt, weight: "medium",[#position])
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text(11.5pt, weight: "semibold",[#position])
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v(0pt)
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findMe(links)
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tagline
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text(9pt)[#tagline]
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experience
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// box(
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// rect(
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// width: 100%,
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// height: 2pt,
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// fill: secondary_colour,
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// radius: (left: 1em, right: 1em)
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// )
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// )
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grid(
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columns: gridBelow.len(),
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column-gutter: 2em,
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columns: (15%, 30%, 55%),
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column-gutter: 1.5em,
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..gridBelow,
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)
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}