You will get a custom binary file parser or converter in TypeScript
Project details
Need to read, convert, or analyze a proprietary or undocumented binary file format? That's my specialty.
I build the binary analysis engine behind a production SaaS that parses automotive ECU firmware: hex-level structure detection, signature and fingerprint matching, checksum calculation and repair — across
95+ device types.
I can build for you:
• A parser for your binary or legacy file format (documented, or reverse-engineered from sample files)
• A converter between your binary format and JSON/CSV/XML
• A validator or checksum tool
• A CLI tool or a library you can embed in your Node.js application
You get fully typed TypeScript code, unit tests that run against your own sample files, and documentation of the format structure as I map it.
Send me 2-3 sample files and a description of what you need to extract — I'll assess feasibility before you order.
I build the binary analysis engine behind a production SaaS that parses automotive ECU firmware: hex-level structure detection, signature and fingerprint matching, checksum calculation and repair — across
95+ device types.
I can build for you:
• A parser for your binary or legacy file format (documented, or reverse-engineered from sample files)
• A converter between your binary format and JSON/CSV/XML
• A validator or checksum tool
• A CLI tool or a library you can embed in your Node.js application
You get fully typed TypeScript code, unit tests that run against your own sample files, and documentation of the format structure as I map it.
Send me 2-3 sample files and a description of what you need to extract — I'll assess feasibility before you order.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$250
|
Standard
$600
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 30 days |
Number of Revisions | 1 | 2 | 2 |
Install Script | - | - | - |
Test Script | |||
Task Automation | - | - | - |
Optional add-ons
You can add these on the next page.
Extra output format (CSV/XML)
(+ 2 Days)
+$75
CLI tool packaging
(+ 2 Days)
+$100
Format specification document
(+ 3 Days)
+$150Frequently asked questions
About Fethan
Full-Stack TypeScript Developer | Node.js APIs, Binary File Processing
Kahramanmaras, Turkey - 8:48 am local time
I designed and shipped a complete SaaS platform for the chiptuning industry: a binary analysis engine that parses ECU firmware files (Bosch EDC/MD1/MG1 families), detects and manages DTC fault codes at the binary level, and matches files against a fingerprint library covering 95+ ECU types — plus the full stack around it: Fastify REST APIs with HMAC-authenticated B2B endpoints, a Next.js frontend in 9 languages, and an Electron desktop client with hardware dongle integration.
What I bring to your project:
- Binary file parsing, hex-level analysis, checksum handling, reverse engineering
- Node.js / TypeScript backends (Fastify, Knex, Prisma, MySQL/PostgreSQL, Redis)
- Next.js / React frontends, i18n, Tailwind
- Electron desktop apps talking to real hardware
- API security: HMAC signatures, rate limiting, quota systems
I work with written specs and async communication, and I deliver production-ready code — validated inputs, proper error handling, tests.
If your project involves file formats, protocols, or APIs that need to work exactly right — let's talk.
Steps for completing your project
After purchasing the project, send requirements so Fethan can start the project.
Delivery time starts when Fethan receives requirements from you.
Fethan works on your project following the steps below.
Revisions may occur after the delivery date.
Feasibility check
I inspect your sample files and confirm what can be extracted, the tier that fits, and the timeline — before any work starts.
Structure mapping
I map the format: header, records, offsets, encodings, checksums. For undocumented formats this is the reverse-engineering phase.