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Web3 Developer Needed to AudiWe're looking for an experienced Solana/Web3 developer to perform a thorough code review and security audit of a custom transaction bundler built for the Solana ecosystem. This is not a smart contract audit. The project is an off-chain application responsible for creating, signing, and submitting bundled transactions. Responsibilities Review the entire codebase for bugs and logic errors Identify security vulnerabilities Verify transaction flow and execution logic Review wallet/key management Validate error handling and retry mechanisms Check RPC usage and performance Review compute budget and priority fee implementation Verify bundle construction and transaction ordering Identify edge cases that could cause failed transactions or loss of funds Suggest improvements for reliability, performance, and maintainability Required Experience You should have experience with: Solana development TypeScript / Node.js @solana/[login to view URL] Versioned Transactions Address Lookup Tables (ALTs) Compute Budget Program Priority Fees Jito Bundles (preferred) RPC optimization Transaction simulation and debugging Deliverables Written audit report List of all discovered issues Severity rating for each issue (Critical / High / Medium / Low) Explanation of why each issue exists Recommended fixes Optional implementation of fixes (please specify if available) Ideal Candidate Previous experience building or auditing Solana trading bots, launch tools, snipers, or bundlers Strong understanding of transaction lifecycle Comfortable reviewing several thousand lines of TypeScript Able to communicate findings clearly To Apply Please include: Links to previous Web3 or Solana projects GitHub profile Any audit reports you've completed Years of Solana experience Whether you've worked with Jito bundles before Your estimated timeline and fixed-price quote Important: Please begin your proposal with the word "Bundle" so I know you've read the entire job description.t Custom Solana Bundler (TypeScript)
Project ID: 40599291
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132 freelancers are bidding on average $478 USD for this job

Bundle Hi there, I've reviewed the requirements for auditing your custom Solana transaction bundler. The system's operational integrity hinges on its ability to correctly construct, sign, and submit atomic bundles. This involves managing versioned transactions, utilizing ALTs, dynamically calculating compute budget and priority fees, and ensuring the signing process is secure-all while handling RPC failures and transaction state without error. Technical approach: My audit will focus on tracing the transaction lifecycle. I'll start with static analysis of the TypeScript codebase, then move to a deep review of the bundle creation logic, fee calculation algorithms, and the use of @solana/web3.js. Special attention will be given to wallet/key management security and the robustness of the submission and retry mechanisms against network or RPC instability. Core modules: - Transaction Ingestion & Queuing Logic - Bundle Assembly & Fee Optimization Engine - Signing & Serialization Security - RPC Submission, Simulation & Confirmation Flow My audit process is structured to deliver a clear, actionable report. It begins with code and logic analysis, moves to identifying specific vulnerabilities and edge cases, and concludes with a comprehensive document detailing each issue, its severity, and a recommended fix. Regards, Rohit
$250 USD in 7 days
7.4
7.4

Interesting project, I will audit your custom Solana transaction bundler, covering bundle construction, transaction ordering, wallet/key management, and retry logic, then deliver a written report with severity ratings and recommended fixes for every issue found. On a recent review of a similar TypeScript bundler using Jito, I caught a race condition in the signing flow that would have caused occasional fund loss under high RPC latency. Questions: 1) Is the bundler using Jito's Block Engine API, or a custom submission path? 2) How many wallets does the key management layer handle simultaneously? Share repo access and I will complete an initial pass of the transaction flow within 48 hours. Looking forward to talking through the details. Kamran
$287 USD in 10 days
6.8
6.8

Hello, Bundle audits for Solana transaction systems are familiar work for me, especially Node.js services that create, sign, and submit transactions through Web3.js. I can review wallet and key handling, versioned transactions, ALTs, compute budgets, priority fees, RPC usage, retries, and bundle ordering. I will trace the full transaction flow, check edge cases that can cause failed transactions or fund loss, and test assumptions with simulation and debugging. You will receive a clear audit report with severity ratings, reasons, and recommended fixes, and I can also help implement fixes if needed. Best regards, Teo
$500 USD in 5 days
5.9
5.9

"Bundle" I will surely achive your given goals with high QUALITY-Web3 Developer Needed to Audit Custom Solana Bundler (TypeScript) I am an CREATIVE web 3 /Multitalented PHP/Full stack developer having rich experience with all the latest technologies with so many successful Tasks. I have some queries to give you accurate time and price Please ping me to get started and provide you great results. Thanks!!!
$500 USD in 7 days
5.6
5.6

Bundle ✋ Hi There!!! ✋ The Goal of the project:- TO THOROUGHLY AUDIT YOUR CUSTOM SOLANA TYPESCRIPT BUNDLER FOR SECURITY, RELIABILITY, PERFORMANCE AND TRANSACTION EXECUTION RISKS. I have carefully read and understood your complete requirements. With 9+ years experience as a full stack developer, I am a strong fit for Web3 code reviews, Node.js and blockchain systems, with similar Solana transaction and bundler projects completed. 1. Review transaction flow, versioned transactions, ALTs, bundle construction, ordering, compute budgets and priority fees. 2. Audit wallet/key management, RPC usage, retries, error handling and edge cases that may cause failures or fund loss. 3. Provide testing, detailed audit report, severity ratings, recommended fixes and full source code delivery where applicable. I can clearly document every finding with practical remediation steps and performance improvements. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!
$260 USD in 12 days
4.9
4.9

This looks like a great fit, We will audit your custom Solana transaction bundler, covering transaction flow, wallet/key management, bundle construction, and retry logic. One area we will focus on closely is transaction ordering within bundles and how your code handles partial failures. A single misordered instruction or a missed simulation check before submission to Jito can lead to failed bundles or fund loss. We will trace every signing path and validate compute budget allocation against actual CU consumption. A couple of quick things to confirm: 1) Are you using Jito bundles exclusively, or do you also submit directly via RPC as a fallback? 2) How is key material stored and accessed (env variables, keyfiles, or a vault)? The number quoted here is a starting estimate. Looking forward to talking through the details. Faizan
$286 USD in 10 days
5.0
5.0

Bundle Hello, I can help perform a thorough review of your Solana transaction bundler with a focus on transaction flow, reliability, and security. The audit will cover bundle construction, wallet/key management, RPC usage, error handling, compute budgets, priority fees, and transaction ordering. The review will include: * Logic and security analysis of the TypeScript codebase. * Verification of Versioned Transactions and Address Lookup Tables (ALTs). * Review of retry mechanisms, transaction simulation, and RPC performance. * Identification of edge cases that could lead to failed transactions or loss of funds. * A written audit report with severity ratings (Critical, High, Medium, and Low) and recommended fixes. * Optional implementation support for the identified issues. One quick question: Is the bundler currently using Jito bundles in production, or is support for Jito planned as part of this audit? Lets discuss on chat, I can start immediately. Best regards, Abhishek
$500 USD in 7 days
5.3
5.3

Bundle Hello, I am interested in performing a thorough security and reliability audit of your custom Solana transaction bundler. I have experience reviewing blockchain infrastructure, TypeScript/Node.js systems, transaction workflows, and performance-critical Web3 applications. I understand this is an off-chain transaction execution system rather than a smart contract audit. My review will focus on the complete transaction lifecycle, including bundle construction, signing flow, submission logic, execution reliability, and potential fund-loss scenarios. I will provide a detailed audit report containing: * Issue descriptions with severity ratings (Critical/High/Medium/Low). * Root cause analysis. * Security and reliability impact. * Recommended remediation steps. * Optional implementation fixes if required. I can provide previous Web3/blockchain experience, GitHub examples, audit samples, estimated timeline, and fixed-price quote after reviewing the codebase size and current implementation. I can start immediately and focus on delivering a clear, actionable audit rather than only identifying problems.
$250 USD in 5 days
4.7
4.7

Bundle I have read your job post. I am a Full Stack Developer with experience working on TypeScript, Node.js, blockchain integrations, and performance-critical backend systems. I can perform a structured review of your Solana transaction bundler, focusing on transaction construction, signing flow, wallet/key management, compute budget configuration, priority fees, RPC reliability, error handling, retry logic, transaction ordering, and overall code quality. The audit report will categorize findings by severity (Critical, High, Medium, Low), explain the root cause of each issue, and provide practical recommendations. If required, I can also implement the approved fixes and help validate the improvements through testing.
$350 USD in 12 days
4.7
4.7

Bundle Hi, This engagement is about validating the reliability of a high-performance transaction pipeline, not just reviewing TypeScript code. I'd audit the complete transaction lifecycle—including bundle construction, signing, RPC interactions, retry logic, priority fees, Address Lookup Tables, compute budgets, and wallet handling—then deliver a structured report with severity ratings, root-cause analysis, and practical remediation guidance. I have experience building and reviewing blockchain backends, Node.js services, API integrations, and performance-critical systems. I can provide a thorough, well-documented audit and, if required, assist with implementing and validating the recommended fixes.
$450 USD in 5 days
4.8
4.8

Bundle. Read through the full brief, including the audit scope: transaction lifecycle, ALTs, compute budget, priority fees, Jito bundles, key management, and RPC retry logic. Direct Solana experience isn't in my background, so I won't claim otherwise. My relevant experience is in reviewing and hardening transaction-critical backend systems: a broker API integration platform (Trading Basket) handling GTT order workflows and PostgreSQL state, where the failure modes I dealt with (partial execution, retry races, stale state) overlap with what you're describing for bundle submission and RPC instability. If you're open to it, I'd approach this as a structured TypeScript code review: trace the transaction lifecycle end to end, flag logic and error-handling issues, and document severity per finding, without claiming Solana-specific expertise I don't have (Jito internals, ALT edge cases). If that's not the fit you need, understood. If it is, I'd want repo access first before quoting a fixed price, since scope depends on codebase size.
$500 USD in 7 days
4.6
4.6

Bundle I’ve built and audited Solana transaction bundlers before—handled bundle construction, compute budget, priority fees, and Jito integration—so this is right in my wheelhouse. I’ll start by running the codebase through a line-by-line TypeScript review, then simulate bundle submission with versioned transactions and ALTs to catch edge cases in ordering and RPC retries. I’ll validate wallet/key management for key leakage risks, test compute budget overflows, and verify priority fee calculations under load. Deliverables: a severity-rated issue list with reproduction steps and fixes, plus optional patch contributions if needed. Can begin immediately. Thanks, Andrii.
$300 USD in 4 days
4.4
4.4

Hello! You need a thorough audit of your custom Solana bundler to identify logic flaws, security gaps, and implementation issues before production use. I've spent years building and debugging complex TypeScript systems with Node.js, and I understand how critical code quality is in high-stakes environments. My Software Development and Software Engineering background means I approach audits methodically: I trace execution flows, test edge cases, and document every finding with actionable fixes. I've debugged production APIs, identified race conditions in concurrent systems, and reviewed codebases for maintainability and security. Java experience has sharpened my ability to spot type safety issues and architectural weaknesses that often hide in TypeScript projects. Here's how I'll audit your bundler: - Review the TypeScript codebase for logic errors, unsafe operations, and potential runtime failures - Test transaction handling flows and simulate edge cases to uncover hidden bugs - Document all findings with severity ratings and recommended fixes What specific bundler features or transaction flows are you most concerned about from a security or reliability standpoint? I'm ready to start immediately and will keep you updated through Freelancer messages as I work through the audit. Best regards, Jordan Rafael G.
$375 USD in 2 days
3.7
3.7

⚠️ If you're not happy, you don’t pay. ⚠️ Hi, Thank you for checking my proposal and sharing the detailed project brief. I can perform a comprehensive security audit of your custom Solana transaction bundler using TypeScript and Node.js with a robust, efficient, and secure design. I will deliver: • Thorough review of the entire codebase for bugs and logic errors • Identification of security vulnerabilities and transaction flow issues • Examination of wallet/key management strategies • Validation of error handling and retry mechanisms • Assessment of RPC usage, performance, and compute budget • Detailed written audit report with severity ratings for each issue • Recommendations for reliability, performance, and maintainability You will also receive: • Suggestions for improvement and optional implementation of fixes. I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag Pipal
$400 USD in 7 days
3.7
3.7

Hi there, I've taken a close look at your project to audit a custom Solana bundler, and I'm confident I can help. With my background in software development and experience working with blockchain technology, I understand the importance of a thorough code review and security audit for an off-chain application like this. I'd like to start by reviewing the entire codebase to identify any bugs, logic errors, or security vulnerabilities, and then verify the transaction flow and execution logic. My experience with Node.js and debugging will come in handy here, and I'm familiar with the Solana ecosystem. I'll make sure to carefully examine the code to ensure it's secure and functions as intended. Let's discuss the details of your project and how I can assist you - I'd appreciate the opportunity to go over your custom transaction bundler and outline my approach.
$250 USD in 7 days
3.9
3.9

With over a decade of experience in software development and engineering, including extensive work in JavaScript and TypeScript, I'm confident I have the skills to fully audit your Solana bundler. My depth of knowledge in the Solana ecosystem, coupled with my proficiency in Node.js and Java will allow me to perform a thorough security and code review on your project. Additionally, my prior engagements with Blockchain technology specifically authenticate my ability to navigate the intricacies of this niche technology. Moreover, I'm diligent, excellent at troubleshooting and problem-solving which is an imperative quality for an exceptional auditor. Having worked on several projects of similar scale and nature as yours before; my approach is thorough yet efficient. My aim is for you to feel secure knowing that every facet of your transaction bundler has been examined exhaustively and meets the highest standards. Let's discuss your timeline and fixed-price quote further – taking that step closer to a more refined Solana bundler.
$250 USD in 5 days
3.6
3.6

I understand you need a rigorous audit of your custom Solana bundler, similar to how I've previously analyzed off-chain transaction processing for [mention a relevant project or tool if possible, otherwise state general experience with similar systems] to ensure optimal performance and security. My focus will be on identifying potential exploits and inefficiencies within your TypeScript codebase. My approach will involve a multi-stage review. First, I'll conduct a static analysis of the entire TypeScript codebase, scrutinizing logic, variable handling, and potential race conditions. This will be followed by dynamic testing, simulating various transaction scenarios and edge cases to verify transaction flow, signing integrity, and robust error handling. I'll pay close attention to your RPC interaction patterns, wallet management security, and the effectiveness of your retry mechanisms. Are there specific threat models or attack vectors you're most concerned about? And what is your timeline for completing this audit? I'm available for a brief call to discuss the project in more detail and outline how I can deliver a comprehensive security assessment.
$583 USD in 21 days
3.3
3.3

Hello, I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and custom portals. I always provide clear communication, continued support after delivery, and 100% client satisfaction. I specialize in Node.js development, creating secure, scalable, and high-performance backend systems with RESTful APIs, real-time applications, and database integration (MySQL, MongoDB, etc.). My focus is on building future-ready applications with clean and optimized code. If you are looking for a dedicated Node.js expert who delivers quality, innovation, and timely results, I’d be glad to work on your project.
$250 USD in 7 days
3.9
3.9

Hello, my name is Jonas, blockchain developer. Transaction safety is where small mistakes can become very expensive, especially in a Solana bundler handling signed transactions and fees. I would start with a full code review of the transaction flow and security-sensitive parts. I check wallet handling, signing logic, bundle creation, and failure cases carefully. Then I review RPC usage, simulations, and fee logic to find places where reliability can break. The audit report is structured with clear severity levels and practical fixes, not just findings. I have built Web3 applications including a trading-focused SaaS platform with AI features, where transaction reliability and backend logic were critical. I also keep delivery safe by documenting every finding clearly and staying available for questions after the review. My goal is to help you understand the risks before they become real losses. Quick one, do you already have test cases or failed transaction examples that you want included in the audit? You get a clear view of your bundler's weak points and the fixes needed. Appreciate you reading this far. I would be glad to review the code with care.
$250 USD in 6 days
3.4
3.4

Bundle I understand that you need a detailed security audit of your custom Solana transaction bundler to identify bugs, vulnerabilities, transaction flow issues, and performance concerns while providing clear recommendations for improvements. I have experience with Web3 development, Solana ecosystems, TypeScript, Node.js, blockchain integrations, and transaction workflows. I can review wallet management, RPC usage, bundle construction, priority fees, error handling, and execution logic to ensure your application is secure, reliable, and optimized. I would be happy to discuss your project in chat, share my relevant Web3 experience, and provide a professional audit approach with actionable findings that help strengthen your Solana bundler. Best regards Farhin B
$255 USD in 9 days
3.5
3.5

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