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Sysfo Software Solutions
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Crypto & Blockchain Development Blockchain products built to hold real money safely.

Smart contracts, tokens, crypto wallets, exchanges and decentralised apps, engineered by a software company that has shipped business systems for 21 years. We design for security first, test every contract before mainnet, and hand you code you own.

Get a free project estimate How it works
  • Smart contracts
  • ERC-20 & BEP-20 tokens
  • Crypto wallets
  • Exchange development
  • DApps & DeFi
  • Blockchain consulting
Crypto exchange user dashboard showing portfolio value, asset allocation and market chart
21+years building secure business software
7500+projects delivered for clients in India and abroad
100%source code ownership on custom builds
Freetechnical consultation and project estimate

Why blockchain projects fail

Six risks that sink crypto and blockchain projects.

On a blockchain, mistakes are public and usually permanent. Most failed launches trace back to the same avoidable problems.

01

Smart contract vulnerabilities

Re-entrancy, unchecked access control or a rounding bug can drain a contract within minutes of deployment.

02

Cloned scripts with hidden flaws

Cheap exchange and token scripts with copied code, no documentation and backdoors nobody has reviewed.

03

Weak key and wallet custody

Private keys on a web server, no cold storage and no multi-signature approval for large withdrawals.

04

High gas fees and slow confirmations

The wrong chain or an inefficient contract makes every user transaction expensive and slow.

05

No bridge to the rest of the business

On-chain data that never reaches your accounts, CRM or reporting, so finance can't reconcile anything.

06

Products users find hard to trust

Confusing wallet flows and missing KYC or support features stop real users from depositing funds.

Our blockchain development services

Crypto and blockchain development services, end to end.

Take a single smart contract or a complete crypto platform with web and mobile apps — every component is designed, tested and documented by one team.

Token development

ERC-20, BEP-20 and TRC-20 tokens with supply rules, vesting, burn and mint logic, plus NFT (ERC-721/1155) collections.

Read more

Smart contract testing & audit support

Unit and fork testing, static analysis, gas optimisation and preparation for an independent third-party audit.

Crypto MLM & payment integration

USDT, TRX, BTC and ETH payment gateways and on-chain income plans for crypto MLM and rewards platforms.

Blockchain consulting

Is a blockchain the right tool? Chain selection, tokenomics review, architecture and cost of ownership, explained plainly.

Maintenance & node support

Node and server monitoring, contract upgrades through proxies, chain upgrades and security patches after launch.

Spot trading screen of a crypto exchange with candlestick chart, order book and buy-sell panel
Spot trading with candlestick chart and live order book.

Crypto exchange development

A crypto exchange platform built for speed and audit trails.

We build centralised exchanges with spot and futures trading, P2P markets and instant swaps, on top of a matching engine designed for fast order execution. Users get live charts, order books and a portfolio view; your operations team gets an admin console for KYC, deposits, withdrawals, fees and system health.

  • Spot, futures, P2P and swap markets with live order books
  • Matching engine, trade history and fee configuration
  • KYC and AML checks, withdrawal limits and approval queues
  • Admin console with liquidity, revenue and system-health views
See our ready crypto exchange software
Crypto deposit screen with network selection, wallet address and QR code for a coin transfer
Deposit flow with network choice, address and QR code.

Crypto wallet development

Crypto wallets that keep keys safe and deposits simple.

Whether you need a custodial wallet inside an exchange or a non-custodial app where users hold their own seed phrase, we design the key management first. Hot wallets hold only what daily withdrawals need, the rest stays in cold storage, and large movements require more than one approval.

  • Multi-coin support: BTC, ETH, BNB, TRX, USDT and custom tokens
  • QR deposits, address whitelisting and network selection
  • Hot and cold wallet split with multi-signature approvals
  • Web, Android and iOS wallet apps with biometric login
Coin detail page with price chart, market statistics and recent trades for a crypto token
Coin detail view with price history and market data.

Token development

Launch a token with clear rules and working utility.

A token is only as credible as its contract and its use. We help you define supply, distribution and vesting, then write ERC-20, BEP-20 or TRC-20 contracts that enforce those rules on-chain. We also build the dashboards, claim pages and listings data your community needs to see the token working.

  • ERC-20, BEP-20 and TRC-20 fungible tokens
  • NFT collections on ERC-721 and ERC-1155
  • Vesting, lock-up, burn, mint and staking logic
  • Token dashboards, claim portals and explorer verification
Security centre in a crypto platform showing two-factor authentication, devices and login history
Account security: 2FA, device control and login history.

Smart contract development & security

Smart contracts tested as if millions depend on them.

Our crypto and blockchain development process treats every contract as financial software. We use well-reviewed OpenZeppelin libraries, write tests for normal and hostile behaviour, run static analysis and fork tests against mainnet state, and keep admin keys behind multi-signature wallets and time locks.

  • Solidity development with Hardhat and Foundry test suites
  • Static analysis with Slither and gas optimisation
  • Upgradeable proxies, role-based access and time locks
  • Preparation and fixes for an independent security audit
Token swap interface showing from and to coins, exchange rate and confirm button
Instant swap between tokens with rate preview.

DApp & DeFi development

Decentralised apps that feel as easy as a normal app.

We build DApps where the logic lives in smart contracts and the front end is fast, clear and mobile friendly. Typical projects include token swaps, staking and yield pools, DAO voting, escrow, and on-chain reward or crypto MLM plans, all connected to popular wallets so users never have to paste a raw address.

  • Swaps, staking pools, yield farms and liquidity dashboards
  • MetaMask, Trust Wallet and WalletConnect integration
  • DAO governance, escrow and on-chain reward plans
  • Indexing with The Graph and back-office reporting
Crypto MLM software with on-chain payouts

What you get

Audited-ready code, clear documentation and a safe launch.

Every blockchain project ends with deployed, verified contracts and working apps — plus the tests and documents that let an auditor, investor or new developer check our work.

  1. Technical specification, architecture and tokenomics notes
  2. Smart contracts with full test suite and coverage report
  3. Testnet deployment for your team to try before mainnet
  4. Web front end and, where needed, Android and iOS apps
  5. Admin console for users, KYC, fees and withdrawals
  6. Mainnet deployment with verified source on the block explorer
  7. Security checklist, key-management plan and runbook
  8. Full source code and repository handover

How we work

Our crypto and blockchain development process.

Security reviews at every stage, a fixed quote agreed upfront, and a testnet you can use long before anything touches real funds.

  1. 1

    Consultation

    free

    We discuss your idea, users and revenue model, and tell you honestly whether a blockchain adds value or a normal database would do.

  2. 2

    Specification & quote

    1–2 weeks

    Chain selection, contract design, tokenomics review and user flows, priced as a fixed, itemised quote.

  3. 3

    Development in sprints

    4–10 weeks

    Contracts, back end, web and mobile apps built in two-week sprints with a demo and a testnet build after each one.

  4. 4

    Testing & audit

    1–3 weeks

    Unit, fork and load tests, static analysis, internal review and support for an independent audit firm.

  5. 5

    Mainnet launch & support

    ongoing

    Deployment, explorer verification, monitoring of contracts and nodes, and upgrades as chains and regulations change.

Engagement models

Choose how you want to build on the blockchain.

Start with advice, launch from a proven product, or build something new. Every engagement is quoted before work begins.

Blockchain consultation

Free

An honest first conversation about your crypto idea.

  • Chain and architecture options
  • Risks and compliance questions
  • Rough timeline and next steps
Get started
Recommended

Custom blockchain project

Fixed price

Smart contracts, tokens, wallets or a DApp built to your specification.

  • Fixed scope and milestones
  • Testnet demo every sprint
  • Full source code handover
Get started

Ready product, customised

From a quote

Launch faster on our crypto exchange or crypto MLM software.

  • Your branding, coins and fees
  • Gateway and KYC integration
  • Hosting and support available
Get started

Support & upgrades

Monthly retainer

Keep contracts, nodes and apps secure after launch.

  • Monitoring and incident response
  • Contract and dependency upgrades
  • New features on agreed SLAs
Get started

Why Sysfo

Why choose Sysfo as your blockchain development company.

Blockchain is one part of a product. We build the whole thing — contracts, apps, admin tools and hosting — with the discipline of a software firm that has been delivering since 2005.

Security before features

Threat modelling, tested libraries, multi-signature admin keys and audit preparation are part of every quote, not optional extras.

Our own crypto products

We maintain crypto exchange, crypto MLM and trading bot software, so your project can start from working, reviewed code.

Multi-chain experience

Ethereum, BNB Smart Chain, Polygon and TRON — we pick the chain for your users' fees and speed, not our habit.

Connected to your business

On-chain activity flows into your accounts, CRM and reports, because we also build ERP and enterprise software.

Honest advice

If a shared database solves your problem better than a blockchain, we will tell you, and explain why.

Confidential and yours

NDAs on request, private repositories, and full ownership of the source code and deployment keys at handover.

Industries we build blockchain solutions for

Blockchain technologies we work with

  • Solidity
  • Ethereum
  • BNB Smart Chain
  • Polygon
  • TRON
  • Bitcoin
  • OpenZeppelin
  • Hardhat
  • Foundry
  • Slither
  • ethers.js
  • web3.js
  • WalletConnect
  • The Graph
  • Node.js
  • React

Products & services

Crypto products and services related to blockchain development

Crypto exchange softwareSpot, futures, P2P and swap trading, ready to brand. Crypto MLM softwareCrypto plan MLM with multi-coin wallets and payouts. Crypto AutoBot appMobile app for automated crypto trading strategies. MLM Software DevelopmentBinary, matrix, unilevel & hybrid plans Web Application DevelopmentCustomer & partner portals Mobile App DevelopmentAndroid, iOS & hybrid apps API DevelopmentREST & webhook design Server Management24×7 monitoring & alerts IT ConsultancyTechnology & architecture audits

FAQ

Crypto & Blockchain Development — frequently asked questions

What do crypto & blockchain development services include?

Crypto & blockchain development covers smart contracts, token creation, crypto wallets, exchanges, DApps and DeFi platforms, plus the web and mobile apps, admin consoles and integrations around them. At Sysfo it also includes consulting on whether a blockchain fits your use case, testing and audit preparation, mainnet deployment, and support after launch.

How much does blockchain development cost?

It depends on the chain, the number and complexity of smart contracts, the apps you need, integrations such as KYC and payment gateways, and whether an external audit is required. Sysfo gives a free consultation and then a fixed, itemised quote after understanding your requirements, so you know the full cost and timeline before development starts.

How long does it take to build a crypto exchange?

Starting from our ready crypto exchange software, a branded exchange with your coins, fees, KYC and gateways can launch in a few weeks. A custom exchange with new trading types, a bespoke matching engine and mobile apps typically takes three to five months, including security testing. The quote fixes milestones so you can track progress.

Which blockchains do you develop on?

We develop on Ethereum and EVM-compatible chains such as BNB Smart Chain and Polygon, and on TRON for TRC-20 tokens and low-fee USDT payments. We also integrate Bitcoin for wallets and payments. The choice depends on your users, expected transaction volume, fees and the wallets and exchanges you need to support.

How do you keep smart contracts secure?

We use audited OpenZeppelin libraries, follow the checks-effects-interactions pattern, write unit and fork tests for normal and malicious behaviour, run static analysis with Slither, and protect admin functions with multi-signature wallets and time locks. For contracts that will hold significant funds we strongly recommend, and prepare for, an independent third-party audit.

Can you create a token like ERC-20 or BEP-20?

Yes. We write and deploy ERC-20, BEP-20 and TRC-20 tokens with the supply, vesting, burn, mint and staking rules you need, verify the source on the block explorer, and build claim pages or dashboards. We also create NFT collections on ERC-721 and ERC-1155. We do not promote tokens or promise listings or prices.

Is crypto and blockchain development legal in India?

Building blockchain software is legal in India. Crypto assets are taxed, and platforms that deal in virtual digital assets have obligations such as registration with the Financial Intelligence Unit and KYC under anti-money-laundering rules. We build in KYC, transaction records and reporting, and recommend you take legal advice for your specific crypto & blockchain development project and market.

Who owns the code and the contract keys?

You do. For custom crypto & blockchain development work we hand over the full source code, tests, deployment scripts and documentation, and contract ownership and admin keys are transferred to wallets you control, ideally multi-signature. For our ready products, licensing and source code options are explained in the quote.

Do you provide support after the launch?

Yes. Our monthly support plans cover contract and node monitoring, server management, security patches, dependency and chain upgrades, bug fixes on agreed SLAs and new features. Because smart contracts are hard to change after deployment, we also plan upgrade paths, such as proxies, during development.

Talk to a blockchain expert

Get a free estimate for your blockchain project.

Tell us about your token, wallet, exchange or DApp idea. A blockchain developer will call you back within one business day to discuss it and arrange a free consultation.

  • Free consultation and estimate
  • Fixed, itemised quote
  • Security-first development
  • Testnet demo before mainnet
  • NDA signed on request
  • You own the code and keys
Call us+91 76074 20009 Emailinfo@sysfosolutions.com

Request a free blockchain project estimate

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