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I will fix c and cpp bugs, memory leaks and crashes
Syed Rehan
About this gig
FREE PRE-ORDER TRIAGE: send your crash log, sanitizer output, or the failing function and I'll tell you the likely root cause and which package fits before you spend anything.
Is your C/C++ code crashing, leaking memory, triggering undefined behavior, or running slower than expected?
I diagnose the root cause, make targeted fixes, and verify the result with reproducible evidence not just hide the symptom.
What I can help with:
- Crashes and segmentation faults
- Memory leaks and invalid memory access
- Undefined behavior and pointer bugs
- Compiler warnings and build issues
- Targeted C/C++ refactoring
Verification may include: GCC/Clang/MSVC builds, -Wall -Wextra, AddressSanitizer, UBSan, Valgrind.
You receive:
- Corrected source code
- Root-cause explanation
- Verification output
- Clear change notes
I keep changes focused so your review burden stays small.
For larger codebases, intermittent bugs, external dependencies, profiling and speed work, message me with your error/build output and I'll confirm the right package before ordering.
Get to know Syed Rehan
Syed Rehan
Low Level Systems and Performance Engineer
- FromPakistan
- Member sinceJun 2023
- Avg. response time4 hours
Languages
Urdu, English
I build and optimize performance-critical software in C, C++ and Rust, with a focus on low latency, memory efficiency and measurable results.
My work covers profiling and hot-path optimization, cache-aware code, SIMD, multithreading, native extensions, networking and low-level debugging.
I work from evidence: benchmark first, isolate the bottleneck, make targeted changes, then verify correctness with tests, sanitizers and reproducible before/after measurements.
Deliverables are clean, documented and ready to review in Git.
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Other Software Development Services I Offer
FAQ
Can you work from just a crash log or core dump?
Often yes — send the log and I'll tell you free whether it's enough to work from.
Will you rewrite my whole codebase?
No. Minimal, targeted changes so your review burden stays small, plus a change log of everything I touched.
The bug only happens sometimes — can you still fix it?
Yes. Building a reliable reproduction is step one and it's included.
Which compilers and platforms?
GCC, Clang, and MSVC on Linux, macOS, and Windows. Embedded toolchains on request.
Is my code kept confidential?
Yes. NDA-friendly, and access is removed on delivery.
What do I receive after the fix?
You receive the corrected source code, a clear root-cause explanation, change notes, and relevant compiler, sanitizer, or test output showing how the fix was verified.
Can you optimize slow C/C++ code too?
Yes. For performance work, I measure first, identify the real bottleneck, make targeted changes, and compare before/after results where practical.
