neven@dimitri-dev:~$

$whoami

Neven Marić

Backend engineer who reads the disassembly.

5+ years of C# and .NET in fintech and healthcare. On weekends, CTFs and a temperamental Mazda RX-8.

read-writeupsView CV

CTF Writeups

Every task I solve gets a writeup: the bug, each pivot, and the payload that worked.

All 61 writeups

$tree ~/writeups --by-competition2 dirs, 61 files

hackultet-2026/Hackultet 2026Mar 2026rank 5/15team: umjetno inteligentni33 writeups

  1. pwn/Pwn, 4 files
    1. Hip Hip Hurahip-hip-hura.md#use-after-free #tcache-poisoning #rop5 min
    2. Processingprocessing.md#stack-canary #fork #rop4 min
    3. Read Me If You Canread-me-if-you-can.md#proc-filesystem #memory-disclosure #deleted-file2 min
    4. Story Timestory-time.md#buffer-overflow #fd-redirection #lfi4 min

29 more in hackultet-2026/

hacknite-2021/Hacknite 2.0Oct 2021rank 2/51team: ELPROS28 writeups

  1. pwn/Pwn, 2 files
    1. Secret Locationsecret-location.md#buffer-overflow #memory-safety #c2 min150 pts
    2. Trip Calculationtrip-calculation.md#c #source-review #logic2 min120 pts
  2. web/Web, 2 files
    1. e-Shop "Union"e-shop-union.md#sql-injection #union #password-hash1 min300 pts
    2. SELECT error FROM infoselect-error-from-info.md#blind-sql-injection #password-hash #automation2 min250 pts

24 more in hacknite-2021/

Work

5 years of C# and .NET, mostly where payments and patient data are involved.

Full CV
  1. 2023–now

    Moberg

    .NET Software Engineer · Full-time, remote

    A payment facilitator that wraps Adyen for the Icelandic market.

    • Worked across the whole e-commerce platform: payment links, payments, webhooks and security. Before that, a separate BNPL system.
    • Benchmarks and smoke tests, most of the e-commerce docs, and hands-on help for merchants integrating.
    • .NET
    • Adyen
    • PCI
    • BNPL
  2. 2025–2026

    Singleton

    Freelance Software Engineer · Sole proprietorship, remote

    Web solutions for local businesses: fast, light on resources and built to get traction.

    • Astro
  3. 2025–2026

    Qualify Health

    .NET Full-Stack Software Engineer · B2B contract, remote

    Healthcare software that matches patients with available funding to cover their expenses.

    • A team of two or three, working under HIPAA and PCI requirements.
    • Cut infrastructure and resource costs by optimising existing applications.
    • .NET
    • HIPAA
    • PCI
  4. 2022–2023

    Mono Software

    .NET Backend Developer · Full-time, on-site

    A microservice cluster on an internal backend architecture that I also maintained and improved.

    • Performance work that meant proofs of concept, benchmarks, a lot of testing and presenting the results.
    • .NET
    • Microservices

Open source

When a library I use breaks, I reproduce it, write it up for the maintainers, and send a fix if I can.

Bugs reported
08

$git log --author=dimitri-dev --upstream8 entries

Adyen/adyen-web# Adyen's Drop-in and Components for web checkout

soundaranbu/Razor.Templating.Core# Renders Razor views to strings outside ASP.NET

segmentio/Analytics-CSharp# Segment's analytics SDK for .NET, Xamarin and Unity