Budget: 15000 USD Deadline: 60 days
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Budget: 15000 USD Deadline: 150 days
Good day, I am a theoretical physicist, mathematician, and specialist in quantum technologies with 20 years of experience. I was at the forefront of creating the first cryptocurrency exchange. I even wrote a scientific paper on the application of blockchain long before it became mainstream. However, it was refused for publication—the scientific community simply wasn't ready at that time.
$15,000 is a great budget for the first phase: gathering the brief, preparing user stories. But a full-fledged system at the level of U.S. government regulation with audits, security, and integrations is more of a $1.5 million project.
By the way, I would like to clarify one more point—do you already have a prepared design in Figma for the current version of the application?
Budget: 15000 USD Deadline: 45 days
We can take this as a focused first phase within the 15000 USD budget and deliver the premium verification layer around the existing Haztrak base - audit trail, proof generation, verification page, evidence packet export, and compliance dashboard.
A realistic delivery window is about 45 days if the current codebase is usable. If the base layer needs deep refactoring, I would split it into architecture review first, because compliance systems punish optimistic shortcuts - measure twice, cut once =)
MY main question is whether the current version already has stable manifest, shipment, user role, document, and signature modules, or whether these are still mostly prototype-level.
> We would design the proof layer so sensitive hazardous-waste data stays off-chain
> Hashes for documents, signatures, corrections, and shipment events are generated deterministically
> Proofs can be grouped and anchored through a smart contract or verification registry
> Every critical change has a legally useful audit record
> PDF exports and evidence packets can be verified later against the original hashes
Two points I would clarify before final scope lock.
> Which blockchain network or registry model do you prefer - public chain, private network, or provider-neutral architecture
> Should EPA e-Manifest and RCRAInfo integration be real API integration in this phase, or only an integration-ready data model
Relevant Ingello examples
> https://business.ingello.com/platforma - enterprise platform architecture with roles, processes, and operational data
> https://business.ingello.com/forma-bpm - business process management logic, approvals, status history, and structured workflows
> https://business.ingello.com/vorfahr - SaaS style automation and product architecture, indirectly close to the verification layer task
Main Ingello FLH page
> https://systems-fl.ingello.com
!!The key here is not just blockchain!!. The valuable part is provable chain of custody, defensible audit history, and clean separation between private compliance records and public proof references. That is the part I would not simplfy too much.
Budget: 15000 USD Deadline: 30 days
Hello!
My name is Mykyta, and I represent the Hexide Digital team. The project is extremely interesting - architecture with the extraction of cryptographic proofs (hashes) into the blockchain without disclosing PII data is best practice for GovTech and environmental compliance.
We have experience in developing complex web platforms with high security requirements, audit logs, and blockchain layer integration. We are happy to implement both business logic with manifests and the mechanics of generating legal proof packages and Proof-of-Integrity.
Here are examples of our work with complex platforms and integrations:
A large-scale system with thoughtful architecture and dashboards: https://genius.space
A web platform focused on data protection and interactive UI: https://lifta.space
A digital service with data verification and complex workflows: https://propertytaxdetective.com
Could you please let me know what stack (technologies) the base version of the platform is currently developed on (Laravel, Node.js, Python, or other) and which blockchain is planned to be used for fixing hashes?
I suggest moving to private messages or having a 10-minute call to discuss the current code and architecture of the next phase. When would it be convenient for you to talk?
Budget: 15000 USD Deadline: 4 days
Good day! I will complete it turnkey. I have experience in implementing such projects. I guarantee the completed work. The exact cost will be calculated after discussing all the details. Shall we discuss?
Budget: 15000 USD Deadline: 25 days
Hello! I noticed that you already have a working basic version of Haztrak (with configured workflows for EPA e-Manifest/RCRAInfo).
The main task now is not to rewrite the system, but to seamlessly integrate the blockchain verification module (Proof Layer) into your existing architecture, maintaining high speed and absolute confidentiality of sensitive data.
Here’s how I will implement this integration:
1. Integration with the existing backend & Hashing Engine:
- I will examine your current stack and set up a module/service that will asynchronously intercept key events (manifest creation, signatures, corrections, unloading).
- Automatic generation of cryptographic hashes (SHA-256) and grouping them into Merkle Trees to minimize transaction costs.
2. On-Chain layer (Smart contracts & Web3):
- Development and deployment of a smart contract to record Root Hashes and Timestamps on the network.
- Setting up background queues for guaranteed transaction sending without delays for system users.
3. Verification module and Audit Package:
- Development of a public verification page where regulators or DEP inspectors can verify the authenticity of any document/manifest with one click.
- PDF report generator with embedded cryptographic proofs and links to transactions on the blockchain.
4. Risk board and audit log expansion:
- Integration into the existing dashboard interface to track unfiled, disputed, or high-risk records.
I specialize in developing complex web systems, API integrations, and Web3 solutions.
I am ready to review the initial repository/documentation of the current version of Haztrak, clarify your stack, and discuss details in private messages!
Budget: 14500 USD Deadline: 60 days
Good day! I am interested in your project. I am ready to perform the assigned task with quality and responsibility. I quickly grasp new tasks, pay attention to details, and always adhere to agreements and deadlines. I would be happy to collaborate!
Budget: 15000 USD Deadline: 45 days
we already have an almost ready architecture for a similar compliance and AI automation platform, so we can adapt it quickly and start discussing the implementation here on the platform ))
for 15000 USD I would treat this as a first production stage - architecture, core premium workflow, blockchain proof layer, verification page, audit dashboard, and evidence packet logic.
full enterprise rollout with deep EPA or RCRAInfo integration, legal hardening, and regulator-grade testing will likely need a second stage.
WE would build it as a secure off-chain compliance system with cryptographic hashes anchored on-chain, so sensitive hazardous-waste data does not leave the application.
for AI, I would add risk scoring, incomplete-record detection, evidence packet assembly, and an assistant for compliance teams that can explain missing actions without changing records by itself.
- similar cases
- https://business.ingello.com/platforma - enterprise platform with roles, structured processes, and controlled data flows
- https://business.ingello.com/forma-bpm - business process automation with approvals, statuses, audit history, and operational logic
- https://business.ingello.com/vorfahr - AI and automation logic for a complex product layer
please clarify 2 points before final pricing
- do you already have the current Haztrak codebase and database schema, or should we rebuild this phase as a separate module
- which blockchain network do you prefer, or should we choose a low-cost registry approach after technical design
more about our software and AI automation work - https://systems-fl.ingello.com
i am on the platform and can discss the next step here.
small note - this is not just a blockchain feature, it is mostly legal-grade data integrity architecture, and that part is where the devil lives in the details =)
Budget: 15000 USD Deadline: 5 days
Have you already decided on the blockchain for anchoring proofs — a custom smart contract on Ethereum/Polygon or a ready-made anchoring service like OpenTimestamps? The specifications are clear: private data (manifests, signatures, correction history) remain off-chain, only event hashes are sent to the chain, grouped in proof batches. I would start with a module for hashing critical events (creation/signature/correction of the manifest) and a document verification page by hash — this is the basis for the evidence packet and chain-of-custody timeline. I am ready to show a working prototype of the anchoring+verification flow in approximately 5 days.
Budget: 15000 USD Deadline: 14 days
The goal is to layer blockchain-anchored proof on top of an existing hazardous-waste compliance platform so records become independently verifiable without exposing sensitive data on-chain.
Here's how I'd approach it: first, a hashing service that generates SHA-256 (or Keccak-256) digests for manifests, signatures, corrections, and shipment events, storing those digests off-chain in a structured audit log. Second, a batched anchoring worker that bundles digest roots into a Merkle tree and writes only the root hash to a public chain (Polygon or Ethereum mainnet via a smart contract) on a scheduled interval, keeping gas costs predictable and sensitive data completely off-chain. Third, a verification API that, given a document ID, recomputes its hash, walks the Merkle proof, and checks the on-chain root, producing a signed evidence packet suitable for regulatory or legal review.
The key architectural risk here is anchor frequency vs. cost vs. legal defensibility: anchoring too infrequently creates gaps in chain-of-custody timelines, but anchoring every event is expensive. I'd recommend a configurable batching window (e.g.
