Skip to content

Validating blocks

Blockchain Applications Built Around Real Business Problems

We design and build blockchain systems for supply chains, finance and records, choosing public, private or hybrid networks based on your actual trust and compliance needs.

When a Blockchain Is the Right Tool

Blockchain development is the work of building applications on a shared ledger, where several parties can write records that no single party can quietly change. It suits problems with multiple organizations, low mutual trust and a need for a permanent audit trail: supplier provenance, document notarization, loyalty points shared across partners, asset tokenization and inter-company settlement. For a single company with one database owner, a conventional database is usually cheaper and faster, and we will tell you so.

Our clients are usually founders testing a Web3 product, enterprises piloting traceability or tokenization, and fintech teams adding on-chain settlement. Each group needs something different. A startup needs a lean MVP on a public chain, while an enterprise often needs a permissioned network such as Hyperledger Fabric with role-based access, off-chain storage for private data and a clean integration with its existing ERP.

Nexzem starts with a short discovery to confirm that blockchain actually earns its place. We then pick the network, write and test smart contracts, build the web or mobile front end, and connect wallets, oracles and back-office systems. You own 100% of the source code and IP, and we sign an NDA on request before any business detail is shared.

Break the chain, see why it holds

A sample chain in your browser. Edit any block's data and every block after it stops matching, until it is re-validated. That is the tamper evidence a ledger gives you.

Our Blockchain Development services

Private, public and hybrid blockchain applications for traceability, shared records and tokenized business workflows.

  1. 01

    Consulting and Proof of Concept

    We assess whether a shared ledger fits your use case, compare network options and build a proof of concept you can show stakeholders before committing budget.

  2. 02

    Permissioned Enterprise Networks

    Hyperledger Fabric and private EVM networks with node setup, membership rules, channel design and private data collections for consortiums that cannot expose records publicly.

  3. 03

    Public Chain Applications

    Applications on Ethereum, Polygon, Solana and EVM layer-2 networks, with gas-aware contract design and wallet login for users who expect open, verifiable records.

  4. 04

    Asset Tokenization

    Token models for property shares, carbon credits, loyalty points or invoices, including issuance, transfer restrictions and investor whitelisting where local securities rules demand it.

  5. 05

    Supply Chain Traceability

    Batch-level tracking from source to shelf, with QR codes, IoT sensor feeds and partner portals that write each handover to the ledger as it happens.

  6. 06

    Blockchain System Integration

    Connectors between the chain and your ERP, CRM or payment stack, using event listeners, indexers and APIs so on-chain data shows up where staff already work.

  7. 07

    Node and Infrastructure Setup

    Provisioning, monitoring and upgrading validator or RPC nodes on cloud or on-premise servers, with alerting, backups and key management handled from day one.

  8. 08

    Maintenance and Upgrades

    Network upgrades, contract migrations, dependency patches and performance tuning after launch, delivered under a monthly support plan with agreed response times.

How Blockchain Development engagements run

Clear stages with a review at the end of each, so you always know what happens next and what it costs.

  1. BLOCK 01

    Discovery and Fit Check

    We map participants, data flows and trust gaps, then confirm whether blockchain is justified and which network type suits it.

  2. BLOCK 02

    Architecture and Token Design

    We define on-chain versus off-chain data, consensus, access roles and any token model, then document it for your sign-off.

  3. BLOCK 03

    Build and Testnet Trials

    Contracts, back end and front end are built in sprints, with unit tests, testnet deployments and a working demo at the end of each sprint.

  4. BLOCK 04

    Security Review

    Contracts go through internal review and automated analysis, and we help you engage an independent auditor before mainnet when real value is at stake.

  5. BLOCK 05

    Launch and Support

    We deploy to mainnet or your production network, hand over keys and documentation, and monitor nodes and contracts under an agreed support plan.

Blockchain Development with Nexzem: what you get

  • Honest Fit Assessment

    We tell you early if a normal database would serve you better, which saves months of building something your users never needed.

  • Tamper-Evident Records

    Every write is timestamped and signed, giving auditors, partners and regulators a history they can verify without trusting one party's word.

  • Full Code and IP Ownership

    You receive all source code, contract addresses, deployment keys and documentation, with no lock-in to Nexzem after handover.

  • One Team Across the Stack

    Contract engineers, backend developers, UI designers and QA work as one team, so the chain, the app and the integrations ship together.

  • Flexible Engagement

    Choose fixed scope for a defined proof of concept, a dedicated team billed monthly per seat, or time and material for evolving roadmaps.

Where Blockchain Development fits

  • Mission 01

    Supply chain traceability for exporters

    An agricultural export consortium records harvest, processing, certification and shipping events on a shared ledger, giving overseas buyers verifiable origin information while each participant keeps commercial details private in its own systems.

  • Mission 02

    Tokenized invoice financing

    A trade finance platform represents verified invoices as tokens that financiers can fund, with ownership and repayments recorded on-chain, reducing duplicate financing risk and speeding up access to working capital for suppliers.

  • Mission 03

    Certificate verification for institutions

    A university issues tamper-evident digital degree certificates anchored on a blockchain, letting employers verify qualifications instantly through a simple portal without contacting the institution, while personal details remain stored off-chain.

  • Mission 04

    Shared KYC records for a consortium

    Several financial institutions pilot a permissioned network for sharing verified customer due diligence status with consent, reducing repeated document collection while keeping personal data under strict access controls and regulatory oversight.

  • Mission 05

    Carbon credit registry

    An environmental platform records the issuance, transfer and retirement of carbon credits on a ledger, preventing double counting and giving buyers transparent proof that credits were retired against their stated emissions.

Blockchain Development, in depth

§01SPEC · DOES-YOUR-PROJECT-REALLY-NEED-A-BLOCKCHAIN

Does your project really need a blockchain?

A blockchain is useful when several organizations that do not fully trust each other need to share and update the same records, and no single party should control them. Supply chains with many independent participants, trade finance networks and tokenized assets often fit this pattern well.

If one organization owns the data and users trust it, a conventional database is faster, cheaper and easier to change. Adding a blockchain to a single-company application usually brings cost and complexity without meaningful benefit, even if the idea sounds innovative.

Useful questions include who writes data, who needs to verify it, what happens if one party disputes a record, and whether transparency or tamper evidence actually changes business outcomes. Honest answers often lead to hybrid designs, where most data stays off-chain and only proofs or key events are anchored on a ledger. A short proof of concept with real participants is the safest way to test assumptions about performance, governance and integration before committing to a full network build.

§02SPEC · CHOOSING-A-BLOCKCHAIN-PLATFORM

Choosing a blockchain platform

Platform choice depends on who participates, what must be public and how transactions are validated. Public networks offer openness and composability with existing ecosystems, while permissioned networks offer privacy, known participants and predictable performance. The main options are listed below.

Permissioned frameworks such as Hyperledger Fabric suit consortiums that need private channels, identity management and fine-grained access control. Teams exploring this route can review our Hyperledger development capabilities and the governance questions such networks raise. Public Ethereum and its layer 2 networks suit applications that benefit from open access, existing wallets and liquidity, such as tokenized assets offered to many investors. Fees and performance on layer 2 networks make many business use cases practical.

Consider long-term maintenance as well: node operations, upgrades, key management and the availability of developers familiar with the chosen platform all affect total cost over the system's life. Budget for these from the start rather than treating launch as the finish line.

  • Hyperledger Fabric for permissioned enterprise consortiums.
  • Hyperledger Besu for private Ethereum-compatible networks.
  • Ethereum and its layer 2 networks for public applications.
  • Solana for high-throughput public use cases.

§03SPEC · INTEGRATING-BLOCKCHAIN-WITH-EXISTING-SYSTEMS

Integrating blockchain with existing systems

Blockchain applications rarely stand alone. Orders, shipments, invoices and identities originate in ERPs, logistics systems and customer applications, so integration determines whether the ledger reflects reality. Each participant needs reliable connectors that write the right events and read updates back into their own systems.

The oracle problem matters here: a blockchain can only guarantee what is recorded, not whether the recorded information was true. Signed data from trusted devices, multiple data sources and audit processes help ensure that what enters the ledger matches the physical world.

Privacy needs careful design. Personal data should generally stay off-chain, with only hashes or references recorded, because ledger data is effectively permanent. This approach also supports asset tokenization and traceability use cases without exposing sensitive commercial information. Operations complete the picture: monitoring nodes, managing keys securely, planning upgrades and agreeing governance rules among participants keep the network trustworthy long after launch.

Technologies we use for blockchain development

Proven, well-supported tools chosen for your scale, budget and team, never for novelty.

  • Solidity
  • Ethereum
  • Polygon
  • Solana
  • Go
  • Node.js
  • React
  • TypeScript
  • PostgreSQL
  • Docker

Blockchain Development FAQs

Something else on your mind? Ask a consultant and get a reply within one business day.

How much does blockchain development cost?

Cost depends on the network type, the number of smart contracts, integrations with your existing systems, wallet and front-end scope, and whether an external audit is needed. A focused proof of concept costs far less than a production consortium network. After a free consultation we share a fixed quote or a monthly team estimate.

How long does a blockchain project take?

A proof of concept usually takes a few weeks. A production application with integrations, audits and user testing takes a few months. We give a phased timeline after discovery so you can launch a first version early and expand from there.

Should we use a public or a private blockchain?

Public chains suit open products where users hold their own assets and want independent verification. Private or permissioned networks suit consortiums that share sensitive data and need control over who joins. Hybrid designs anchor proofs on a public chain while keeping the underlying data private.

Will our business data be stored on the blockchain?

Usually not in raw form. We keep personal and sensitive data off-chain in encrypted databases and write only hashes or references on-chain. This keeps you aligned with privacy laws such as India's DPDP Act and GDPR, which give people the right to correct or erase their data.

Who owns the code and the deployed contracts?

You do. You receive 100% of the source code, IP, admin keys and deployment records at handover. We can sign an NDA before discovery begins.

Do you support the system after launch?

Yes. We offer monthly support covering node monitoring, contract upgrades, security patches and new features, or we can train your in-house team and hand over fully.

Can data on a blockchain be deleted to meet privacy laws?

Data written to most blockchains cannot practically be deleted, which conflicts with erasure rights under laws such as GDPR and India's DPDP Act. The standard approach keeps personal data off-chain in conventional databases and records only hashes or references on-chain, so personal records can be deleted when required.

How do blockchain transaction fees work?

Public blockchains charge fees, often called gas, for each transaction, paid in the network's token and varying with demand. Layer 2 networks reduce these fees significantly. Permissioned networks have no per-transaction fees in the same sense, but participants bear infrastructure and operational costs instead.

Can a blockchain integrate with our ERP?

Yes. Integration services listen for business events in the ERP, such as dispatches or invoices, write corresponding records to the blockchain, and update the ERP when relevant ledger events occur. Integrations are designed with retries and reconciliation, so both systems stay consistent despite network delays.

Since our first project

Happy clients
250+
Projects delivered
150+
Industries served
15+
Pricing and engagement models
  • Mutual NDA first

    Signed before any detailed discussion of your idea.

  • You own the code

    100% of the source code and IP is yours on delivery.

  • Reply in one business day

    From a solutions consultant, Mon to Sat, 09:30 to 18:30 IST.

  • Estimate in 48 hours

    A fixed quote or team estimate, broken down by milestone.

We work with clients across the USA, UK, Australia, UAE, New Zealand and India.

Where we work

Tell us what you're building.

A solutions consultant replies within one business day with next steps, a rough estimate and a suggested team.