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I’m looking for a solid, pragmatic engineer who’s comfortable jumping into an existing codebase and figuring things out quickly. Most of the work starts from a GitHub PR. You’ll read through the diff, understand what’s actually broken, trace it through the code (JS, Python, or Java), and then rewrite the fix so it’s clean and easy to review. The important part: you don’t just patch things blindly. You reproduce the issue first, write a test that proves it’s broken (watch it fail), then fix it and make sure everything passes. After that, you leave things in a better state with solid tests in place. You’ll also set things up with Docker so anyone can run the project and tests the same way without headaches. This is real-world work — messy code, unclear naming, edge cases — so you need to be comfortable digging through other people’s logic and making sense of it. For each task, I’m expecting: a clean fix (PR/commit) a test that fails before and passes after a Docker setup that just works One important thing — before applying, please watch the onboarding video carefully. There is a non-trivial assessment (not short or easy) to confirm you understand the workflow. In your proposal, mention that you’ve watched the video [login to view URL] and are ready to take the assessment — otherwise I won’t move forward. [login to view URL](example questions) Big bonus if you’ve worked on AI training / coding evaluation projects or anything similar — that experience translates really well here. If this sounds like your kind of work, send a quick intro, a bit about your debugging/testing experience, and a GitHub link or code sample. Tech-wise: mostly JavaScript, Python, Java, and Docker. Looking for someone sharp, detail-oriented, and easy to work with. Start your proposal by answering two questions from the example image
ID Projek: 40346419
99 cadangan
Projek jarak jauh
Aktif 18 jam yang lalu
Tetapkan bajet dan garis masa anda
Dapatkan bayaran untuk kerja anda
Tuliskan cadangan anda
Ianya percuma untuk mendaftar dan membida pekerjaan
99 pekerja bebas membida secara purata $15 USD/jam untuk pekerjaan ini

⭐⭐⭐⭐⭐ At CnELIndia, we recognize the value of working in diverse codebases and quickly ascertaining how to improve them. Across our 18 years of experience, we have developed an exceptional ability to understand broken code and rewrite it cleanly and intuitively. We take great pride in leaving projects in a better state than when we found them; our thorough debugging process ensures all issues are resolved and any potential future issues are preemptively addressed. Moreover, our robust understanding of Docker guarantees that any project we work on will be easily reproducible for your entire team. At CnELIndia we strongly believe in leaving projects well-documented and accessible for all stakeholders, allowing full comprehension for further development. Despite the complexities associated with messy codes and edge cases, our team of experts doesn't falter. We possess the necessary skills to identify hidden challenges, provide clean fixes, tests that prove the code functionality as well as deliver Docker setups that "just work." The experience we have garnered from previous projects, including AI training and coding evaluation jobs, translates particularly well to this assignment. Therefore, by hiring us you can be certain that you are getting not just expertise but-experience-supported skill set on board.
$12 USD dalam 40 hari
7.7
7.7

Hi, I’ve been a full-stack developer for 15 years, working extensively with JavaScript, Python, and PHP. I’ve led multiple startups from the ground up, managing everything from server configuration to CI/CD pipelines. I’m well-versed in agile methodologies and have worked as a dedicated team member, fully integrating with product teams. I’ve also developed several web apps with complex workflows, including multi-role systems with intricate permission settings. I understand the importance of delivering a complete product rather than just a working feature. At my core, I’m a problem-solver who thrives on challenges. I’m equally comfortable working independently or collaborating closely with a team. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best regards, Adil
$15 USD dalam 40 hari
7.1
7.1

Q1: 3 commits: [f2p], [sol], [meta]. Q2: The [sol] commit should contain only the feature code — no new tests. This is exactly the kind of work I enjoy: starting from a GitHub PR, reproducing the bug, tracing it through unfamiliar JS, Python, or Java code, and turning a messy patch into a clean, reviewable fix backed by a failing-then-passing test. The real technical risk in this workflow is shipping a “fix” that only matches the diff but does not prove root cause, so I always begin by isolating the issue locally, writing the regression test first, and then tightening the implementation until the full suite passes cleanly. I am comfortable working inside existing codebases with unclear naming, edge cases, and legacy logic, and I regularly use Docker to make the app and test environment reproducible so anyone on the team can run the same setup without surprises. I also have relevant experience with code evaluation and debugging-heavy workflows where precision, reasoning about other people’s code, and auditability of the final change matter more than quick patching. I reviewed the example image carefully and I am ready to take the assessment; I also attempted to open the onboarding video link, but it appears to require sign-in from my side, so I will watch it fully as soon as access is available. GitHub/code samples can be shared directly, and I’d be glad to work in the reproduce → test → fix → Docker flow you described. Best Regards, Hercules
$12 USD dalam 40 hari
7.1
7.1

With over 9 years of experience in building Web & Enterprise applications using Java and J2EE Technologies, I bring a wealth of knowledge to any codebase I work with. I have a vast range of skills, including those specifically relevant to your project like Spring Boot–based microservices, Distributed systems, PostgreSQL/MySQL/MongoDB performance tuning, Hibernate/JPA data management and Docker deployment. Not only have I successfully built and maintained large scaled backend architectures but have also owned and optimized existing implementations. My commitment lies deeply within leaving codebases healthier than when I found them. In regards to debugging and testing, my experience in API security, validation, automated testing (JUnit, Mockito) can prove to be valuable. As someone from a finance, compliance, healthcare background among others, I am comfortable working with messy codes - understanding ambiguous naming conventions and swiftly identifying and addressing pain points and edge cases. I also possess a good grounding in AI integration which makes me adept at handling complex tasks that involves working on AI training / coding evaluation projects. The exposure has taught me the power of clean system boundaries, reliability, and scalability while making use of AI tools for code quality improvement which should translate well into your project's requirements.
$12 USD dalam 40 hari
7.2
7.2

I watched the onboarding video carefully. Ready for the assessment. This is exactly my kind of work. Messy codebases. Unclear naming. Edge cases hiding in dark corners. I dig through other people's logic daily and leave things cleaner than I found them. JavaScript, Python, Java — comfortable in all three. Docker setup so anyone can run the project the same way. No headaches. For every fix: clean PR, a test that fails before and passes after, and a Docker environment that just works. GitHub link available. Let me take your assessment.
$12 USD dalam 40 hari
7.3
7.3

Hi! I can help you with the debugging and testing workflow. I've watched the onboarding video and I'm ready to take the assessment. From the example questions, the answers are: the first step is to reproduce the bug and write a failing test before touching any code, and the Docker setup ensures consistent environments so tests run the same way for everyone. I'm Edward, 10+ years working across Python, JavaScript, and Java. Digging through messy codebases and writing tests that prove the fix is solid is exactly the kind of work I enjoy. Happy to share my GitHub and chat more about this.
$25 USD dalam 7 hari
6.7
6.7

Having worked with disparate codebases and fixed complex issues throughout my 8-year journey, I'm confident that I have the proficiency you need for your debugging and testing project. I possess advanced skills in JavaScript, Python, and Java—your primary technologies— along with experience in Docker setup and CI/CD processes. Moreover, with a keen eye for detail, I do not just patch things up. I reproduce and test the issue meticulously before introducing a fix to ensure long-term efficacy. Prior to tackling your project, I carefully watched the onboarding video and am ready to take the comprehensive assessment to establish my commitment and understanding of your workflow. My response ensures that you get exactly what you need—a clean fix with proper GitHub PR commits, appropriate tests (that fails before and passes after), and an efficient Docker setup for seamless project replication. AI training and coding evaluation projects have been my forte, giving me the added advantage of being comfortable in messy codespaces. Furthermore, I am well-versed in Linux systems, Git workflow (with GitHub) which will ease working together on projects. In sum, proficiency, dedication, sound familiarity with your tech stack, and adaptability set me apart as an adept choice for your codebase scrutinization requirements
$12 USD dalam 40 hari
6.6
6.6

Your workflow depends on catching regressions before they hit production. If your test suite doesn't fail when the bug exists, you're shipping broken code with a false sense of security. Quick question - are you running these tests in CI/CD pipelines that block merges, or is this manual verification? And what's your current test coverage percentage across the JS/Python/Java repos? Here's how I'd approach this: - DOCKER COMPOSE: Build multi-stage containers with volume mounts for hot-reload during development, plus separate test/prod configs so engineers don't waste time debugging environment drift. - PYTEST + JEST + JUNIT: Write integration tests that reproduce the exact failure condition from the GitHub issue, commit them as failing tests, then fix the code and watch them turn green - this proves the fix actually works. - GIT BISECT + DEBUGGING: Use git blame and breakpoint debugging (pdb/node inspect/IntelliJ) to trace where the logic broke, not just where symptoms appear - I've debugged race conditions in async Python that looked like database issues. - CI/CD VALIDATION: Set up GitHub Actions workflows that run the full test suite on every PR and block merges if coverage drops below threshold - prevents "it works on my machine" disasters. I've spent 8 years doing exactly this kind of forensic debugging work - jumping into unfamiliar codebases, reproducing elusive bugs, and leaving behind test coverage that prevents the same issue twice. I've worked on AI model evaluation pipelines where one bad data transformation corrupted 50K training samples, so I'm very familiar with tracing logic through complex systems. I watched the onboarding video and I'm ready to take the assessment. The example questions show you're testing for real problem-solving, not just syntax knowledge. Let's schedule a quick call to discuss your most painful recurring bugs and how we prevent them systematically.
$11 USD dalam 30 hari
7.1
7.1

Hi! I’m confident I can jump into your existing codebase and handle the GitHub PR workflow exactly as you described — reproducing issues, writing failing tests first, then implementing clean fixes with solid test coverage. I’m comfortable working across JavaScript, Python, and Java, and can ensure your Docker setup runs smoothly for consistent testing. I pay close attention to messy edge cases and always leave the code in a more maintainable state. I’ve also watched your onboarding video and am ready to take the assessment. Looking forward for your positive response in the chatbox. Best Regards, Arbaz M
$12 USD dalam 11 hari
6.4
6.4

Hi, I’m available to start right away. I have strong experience with modern development workflows across JavaScript, Python, Java, Docker, Git, and test-driven debugging, i can fix this quickly. I’ve watched the onboarding video carefully and I’m ready to take the assessment, and this workflow of reproducing issues, writing failing tests first, then delivering clean fixes with reliable Docker setups is exactly how I work on real-world codebases. I’m comfortable digging through messy PRs, tracing bugs across services, improving test coverage, and leaving systems in a cleaner and more maintainable state after each fix. You can expect clear communication, fast turnaround, and a high-quality result that fits seamlessly into your existing workflow. Best regards, Juan
$12 USD dalam 40 hari
5.8
5.8

Hi, Answer 1: I always reproduce the issue locally before making any changes, then write a failing test to clearly capture the bug. Answer 2: After fixing, I refactor if needed and ensure all tests pass to leave the codebase cleaner and more stable. I’ve carefully read the full job description and watched the onboarding video. I understand the workflow and I’m ready to take the assessment. About me: • Strong experience debugging real-world codebases (JS, Python, Java) • Comfortable reading PR diffs, tracing issues, and identifying root causes • Follow strict workflow: reproduce → failing test → fix → verify → refactor • Write clean, maintainable, and review-friendly code • Solid experience with unit/integration testing (Jest, PyTest, JUnit) • Experienced in Dockerizing projects for consistent environments How I work: • Never patch blindly — always validate the issue first • Add meaningful tests that prevent regressions • Keep commits clean and easy to review • Improve code quality where safe (naming, structure, edge cases) I’ve worked on messy, production-level systems where debugging and clarity matter more than speed. I’m comfortable navigating unclear logic and turning it into something reliable. I can start immediately and handle tasks independently with minimal back-and-forth. Happy to share GitHub examples and take on the first task.
$15 USD dalam 40 hari
5.2
5.2

Hey, I have watched the onboarding video and I am ready to take the assessment. I will work from each GitHub PR, read the diff, trace the root cause through JS, Python, or Java modules, reproduce the issue locally, write a failing test, apply a clean fix, and confirm the full suite passes. Every task will include a working Docker setup so the project and tests run identically on any machine. My debugging process is always the same: reproduce first, understand the surrounding logic second, fix last. I treat the failing test as the proof that the bug is real and the passing test as the proof that the fix holds. This approach works well in messy, real-world codebases because the test documents exactly what broke, even when the code itself is unclear. I have experience with AI training and coding evaluation workflows, which translates directly to this type of structured debug-and-test work. Questions: 1) Are tasks assigned one at a time, or will I have a queue to work through? 2) Do the repos already have CI pipelines, or is Docker the primary way to validate? Looking forward to your response.
$12 USD dalam 40 hari
5.3
5.3

Greetings, I watched the onboarding video and I'm ready to take the assessment. I appreciate how you emphasized the importance of understanding the workflow before jumping into the code. I know that debugging isn't just about patching things up; it's about really getting to the bottom of an issue, reproducing the problem, and ensuring the fix is solid with proper tests. I've worked extensively with JavaScript, Python, and Docker, so I'm comfortable navigating messy code and implementing clean solutions. I always make sure to leave the codebase better than I found it, both with the fix and through reliable tests. I understand that working with unclear naming and edge cases can be challenging, but I enjoy the process of making sense of it all. Could you share some examples of the kinds of issues you've faced recently? Best regards, Mehran Riaz
$13 USD dalam 40 hari
5.0
5.0

Q1: 3 commits: [f2p], [sol], [meta] Reason: clean workflow = failing test -> solution -> metadata Q2: Only the feature code — no new tests Reason: tests are introduced in [f2p], solution commit should only implement the fix Hello. Yes I’ve watched the onboarding video carefully and I’m ready to take the assessment. My approach is always to reproduce the issue first, write a failing test, then implement a clean fix and verify everything passes. I’m comfortable working across JavaScript, Python, and Java codebases, tracing bugs through unfamiliar logic and improving structure along the way. I regularly use Docker to ensure consistent environments and reproducible test runs. I’ve also worked on debugging-heavy and evaluation-style tasks where code quality, edge cases, and test coverage are critical. Happy to share GitHub examples and jump into a PR-based workflow immediately.
$12 USD dalam 40 hari
5.1
5.1

Hello, I have extensive experience in debugging and testing complex codebases, including reviewing GitHub PRs, reproducing issues, and implementing clean, review-friendly fixes. My approach involves understanding the problem thoroughly, writing fail-proof tests to demonstrate the failure, fixing the issue, and ensuring all tests pass seamlessly. Additionally, I am proficient in Docker setups to facilitate smooth testing environments. Could you clarify whether there are specific areas or modules within the codebase that require immediate attention or particular expertise? Grounded and Respectfully,
$25 USD dalam 42 hari
5.4
5.4

✋ Hi there. I can review your PRs, trace issues across JS, Python, and Java, and deliver clean fixes with proper tests and a working Docker setup. A: I would first reproduce the issue locally, confirm the failure, then trace the root cause through the code and logs before writing a failing test. B: I would fix the issue with clear logic, rerun tests to confirm success, and refactor if needed to keep the code clean and readable. ✔️ I have strong experience debugging real world codebases with mixed stacks and unclear structure. I have worked on tasks where I reviewed diffs, reproduced bugs, and added unit and integration tests to lock fixes. I have also handled Docker setups to make projects run the same across systems. ✔️ For your project, I will start from the PR, understand the change, reproduce the issue, and write a failing test. Then I will fix the bug, ensure all tests pass, and leave the code in a better state with clear structure and comments. ✔️ I will also prepare a simple Docker setup so the project and tests run with one command, and keep commits clean and easy to review. I have watched the onboarding video and I am ready to take the assessment. Let’s chat and get started. Best regards, Mykhaylo
$12 USD dalam 40 hari
5.0
5.0

As an experienced engineer, I've spent years tackling deep, complex issues across various codebases, fully capable of jumping right into your existing one. The critical difference I offer is my commitment to ensuring comprehensive understanding of the issues, through impeccable code tracing and testing. I never just patch things blindly -- instead, I start by reproducing the error, writing a test that explicitly demonstrates the failure and fixing it with clean efficiency. My goal is to leave everything in a better, more structured state after every fix. Moreover, I am well-accustomed to the value of being detail-oriented and always focused on producing high-quality deliverables within deadlines - perfectly aligned with your project’s demands. Having worked previously on AI training and coding evaluation projects similar to yours, I can bring insightful expertise to elevate your project from good to great. Let me confirm upfront that not only have I watched your onboarding video but also assessed myself with the sample questions you shared. Rest assured – selecting me will ensure that each task is completed with a clean fix (PR/commit), matching test cases passing before/after the fix and a foolproof Docker setup
$12 USD dalam 40 hari
4.7
4.7

Hello, Two quick questions from the example image answered: first, yes I verify failures before fixing; second, yes I set up Docker so anyone can reproduce the project and tests with a single command. I hope you’re well. I’m an engineer who jumps into existing codebases, reads diffs, traces bugs across JS, Python, and Java, and rewrites fixes that are clean and review-friendly. I’ve built robust test suites around bug repros, and I routinely add Docker-based run instructions to guarantee identical environments for all teammates. I’ll reproduce the issue from the PR, write a failing test to prove it, implement a solid fix, and ensure all tests pass. Then I’ll ship a Docker setup that just works and leave the project in a better state with strong tests in place. I’ve watched the onboarding video you shared at the link and am ready to take the assessment. Best regards, Billy Bryan
$20 USD dalam 17 hari
4.5
4.5

As an Experienced Engineer with over seven years in software development, I bring a diverse set of skills to the table that match perfectly with your project's requirements. From Java and JavaScript to Linux and Python, I am proficient in multiple languages that include the core ones you mentioned. My proficiency extends beyond just coding; I am equally adept at debugging and testing – reproducing issues, writing tests for failed cases, fixing them and ensuring everything passes. Moreover, I genuinely believe in a deep understanding of each project before pitching in. My experience dealing with different domains also makes me more adaptable to new technologies and workflows. And if all this doesn't sufficiently speak to my expertise, let my thousands of hours poured into similar AI training/coding evaluation projects pour my credibility across! Choosing me for your runtime-testing projects will be nothing short of a great decision made!
$8 USD dalam 40 hari
6.4
6.4

Hi there, I’ve watched the onboarding video and I'm ready to take the assessment. It sounds like you need someone who can quickly dive into an existing codebase, diagnose issues, and provide clean, effective fixes with proper testing. My approach would involve reproducing the reported issues, writing tests to confirm the problems, and then implementing fixes that maintain the integrity of the code. With 4+ years of experience in debugging and testing across JavaScript, Python, and Java, I’m comfortable navigating messy code and clarifying logic that might not be straightforward. I also have experience setting up Docker environments to ensure smooth project execution. One question I have is about the complexity of the edge cases you've encountered so far — are there any specific examples that would help me understand the challenges better? Best regards, Arslan Shahid
$8 USD dalam 3 hari
4.9
4.9

Ha Noi, Vietnam
Kaedah pembayaran disahkan
Ahli sejak Feb 23, 2017
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