Blockchain & Web3 Technology: Accelerate your transition to the trust economy
Blockchain at the heart of your IT projects: Enhance security, transparency and efficiency
Blockchain innovation driving performance
Blockchain technology has moved beyond the experimental stage to become the cornerstone of a global financial and transactional infrastructure. At Coexya, we don’t just jump on the bandwagon: we industrialise decentralised solutions to integrate them at the heart of your business strategy. As a leading IT expert, we transform the complexity of protocols into secure, compliant and fully scalable growth drivers.
Comprehensive support: From strategic consulting to on-chain operations
Our value proposition is based on a dual approach: the agility of native Web3 protocols and the rigour of enterprise environments. We support you throughout the entire lifecycle of your projects, from concept development to ongoing maintenance in production environments (TMA).
1. Advice and strategy for your critical decisions
We help It managers and business departments to resolve technical and regulatory uncertainties.
- Scoping studies and Proof of Value (PoV): We validate the economic viability (ROI) of your projects before any investment is made.
- Governance and Compliance: We ensure your projects comply with MiCA, DORA and NIS2 regulations, amongst others. We incorporate GDPR requirements from the design stage (Privacy by Design).
- Business Support: Assessment of the suitability of our Tediji or Transparency solutions for your specific processes.
2. Architecture & Security of Digital Assets
The technical architect must ensure complete resilience. Coexya provides vital expertise in securing hybrid infrastructures.
- Advanced custody systems: Integration of custody solutions based on MPC (Multi-Party Computation) and HSMs with clients using all market solutions (Fireblocks, Taurus, Ripple Metaco, etc.).
- Design of Resilient Architectures: Design of secure gateways between Web2 and Web3, with rigorous management of signatures and access (no cyber compromises). We have already deployed or used blockchain nodes with all major web hosting providers (AWS, Azure, GCP, IBM Cloud, etc.).
- Interoperability: Connecting your blockchain solutions (such as Tediji) to your existing tools (ERP, CRM, Core Banking) via robust APIs. We have developed particular expertise in orchestrating complex services between your ‘off-chain’ IT systems and your ‘on-chain’ smart contracts.
3. Smart Contract Engineering & Web3 Development
Our specialist developers build innovative and optimised on-chain solutions. We have experience with smart contracts in EVM environments (Ethereum, Bezu, Optimism, etc.), Tezos and Sol
- Custom development (Solidity & Rust): Creation of smart contracts optimised to minimise gas consumption (Gas Optimisation) and prevent vulnerabilities (Reentrancy, Front-running).
- Expertise in Tokenisation Standards:
- Real-World Assets (RWA): Implementation of ERC standards (ERC-20, ERC-1400, ERC-3643 for the issuance of compliant securities, etc.).
- Decentralised Finance (DeFi): Expertise in major market protocols (Uniswap, AAVE, Morpho, etc.) and integration methods.
- User Experience: Use of Account Abstraction (ERC-4337) to simplify the customer journey.
- On-chain content indexing: We are familiar with best practices, tools and the most appropriate languages for capturing and indexing on-chain data. We develop off-chain bridges, oracles and orchestrators for multi-chain projects (e.g. mint/burn bridges).
- Innovation: Development of specific modules to extend the capabilities of our proprietary platforms.
4. DevOps Industrialisation & Node Management
We are transforming node management into an automated and monitored system.
- Infrastructure-as-Code (IaC): Full deployment automation using DevOps tools such as Terraform and Ansible. We have already supported numerous organisations in the large-scale deployment of full nodes in production, and have been managing our own nodes 24/7 without interruption since 2020.
- Monitoring and Anti-Slashing: Use of monitoring stacks (Prometheus, Grafana) to monitor validator health and prevent network penalties through real-time alerts.
- Low-level security: System hardening and secure management of signature servers (Remote Signers).
- Cybersecurity: A subject that should never be taken lightly in the world of blockchain and digital assets. Whether you simply want an external perspective on your practices or require support to prepare for your smart contract audits or PASSI/ISO 27k audits of your IT system.
Our Proprietary Solutions: Blockchain Innovation by Coexya
Beyond consultancy and integration, Coexya has developed practical technological solutions to address the security and visibility challenges faced by businesses.
Tediji: Certified Electronic Signatures on the Blockchain
To secure your document workflows, we have developed Tediji, an electronic signature solution that uses blockchain as an immutable trusted third party.
- Total Integrity: Every signature is recorded on-chain, ensuring that a document has not been altered or tampered with after validation.
- Proof of Existence: An independent, certified timestamp, eliminating reliance on a single central authority.
- Use Cases: Ideal for complex contracts, diplomas, minutes of general meetings and sensitive legal documents.
Transparency: End-to-end traceability of your supply chain
Transparency is our platform dedicated to providing visibility into logistics flows and proof of origin.
- Collaborative Trust: Enables all stakeholders in a value chain to share certified, non-repudiable data.
- Anti-Counterfeiting: Granular tracking of product provenance, from manufacturer to end consumer.
- ESG Compliance: Automation of compliance reporting and proof of environmental impact via shared ledgers.
Why is Coexya the trusted partner of major clients?
The expertise of an IT specialist, the agility of a software publisher
Coexya offers the stability of an established organisation, certified to ISO 27001, capable of committing to rigorous service level agreements (SLAs). As the developers of Tediji and Transparency, we have full control over the entire technology stack, ensuring maximum long-term viability for your projects.
An agnostic and sovereign approach
We are not tied to any single protocol. Our independence allows us to recommend the most sustainable solution: a public blockchain for transparency, or a private network (Hyperledger Besu, Quorum) for consortium confidentiality.
FAQ: Everything you need to know about blockchain in business
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/ 1. What are the practical advantages of blockchain compared to a traditional database?
The difference lies in governance and immutability. Whilst a traditional database is managed by a single entity that can modify the data, blockchain ensures that no information can be altered once it has been recorded.
Coexya’s expertise: We use this technology to create a ‘single source of truth’ shared among multiple partners (suppliers, customers, auditors), thereby eliminating the need for manual reconciliation and the risk of fraud.
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/ 2. Is blockchain technology compliant with the GDPR and the right to be forgotten?
This is a key concern for CIOs. The answer is yes, provided a hybrid architecture is adopted. Personal data is never stored directly ‘on-chain’; only its digital fingerprint (the hash) is stored.
Coexya’s expertise: Our notarisation and traceability solutions strictly comply with the GDPR. In the event of a deletion request, the source data is erased from your servers, rendering the fingerprint on the blockchain unreadable and thus anonymised.
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/ 3. How can blockchain help demonstrate my CSR commitments?
Blockchain technology enables the creation of a Digital Product Passport (DPP). It records every stage of a product’s lifecycle, from raw materials to recycling, in a tamper-proof manner.
Coexya’s expertise: With our Transparency solution, we help CSR departments transform their sourcing evidence (certificates, labels, origin) into an auditable digital asset of trust, thereby protecting the brand against greenwashing.
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/ 4. Is it possible to integrate blockchain into my current IT system (ERP, CRM)?
Yes, blockchain does not replace your existing tools; it integrates with them as an additional layer of verification.
Coexya’s expertise: We develop secure APIs that enable your software (SAP, Oracle, Salesforce) to communicate natively with the blockchain. This makes it possible, for example, to automatically generate an invoice as soon as proof of delivery is recorded on the network.
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/ 5. What will be the environmental impact of a blockchain project in 2026?
Not all blockchains are created equal. Modern ‘Proof-of-Stake’ protocols consume 99% less energy than older generations such as Bitcoin.
Coexya’s expertise: We prioritise eco-friendly and sovereign infrastructures (such as Tezos with our Tediji offering). We support our clients in selecting protocols whose carbon footprint aligns with their decarbonisation goals.
Would you like to turn a concept into an industrial solution?
Meet our experts for a demonstration of our solutions or for an assessment of your Web3 infrastructure.
