Crypto & Web3 Development — Exchanges, Wallets, Tokens & dApps
Quick answer
What does Hurain Technologies build for crypto & Web3?
Exchanges, token issuers, and Web3 platforms need production-grade blockchain engineering — not prototype code — to survive audits, scale to real transaction volume, and integrate cleanly with fiat rails.
Reviewed by Shahnavaz Syed, Founder · Last updated
Overview
Crypto & Web3 software, built for how the industry really works
Exchanges, token issuers, and Web3 platforms need production-grade blockchain engineering — not prototype code — to survive audits, scale to real transaction volume, and integrate cleanly with fiat rails.
Crypto & Web3 teams typically need: token, coin, and smart contract development; exchange, wallet, and custody infrastructure; deFi protocol engineering; security audits and gas optimization; fiat-to-crypto payment rail integration.
We work as an engineering partner for crypto & web3 businesses — from discovery and architecture to build, compliance evidence and 24/7 support after launch — so your team can focus on customers, partners and regulators.
The challenge
What crypto & Web3 teams struggle with
Contracts that won't survive an audit
Prototype-stage smart contracts with no formal testing routinely fail third-party security review, blocking funding, listings, or mainnet launch.
No bridge to fiat rails
Token and exchange platforms that can't cleanly connect to banking and card rails lose users at the on/off-ramp step.
Custody risk at scale
Manual or under-engineered key management is the single largest cause of exchange and wallet fund losses.
Gas costs and throughput ceilings
Poorly optimized contracts and undersized infrastructure make transactions expensive and slow as adoption grows.
Our approach
How we build for crypto & Web3
Production-grade token & smart contract development
ERC-20/721/1155, BEP-20, and SPL contracts built with checks-effects-interactions patterns, reentrancy guards, and formal test coverage before any audit.
Independent audit coordination
We prepare documentation and test coverage and remediate findings alongside leading third-party audit firms before mainnet deployment.
Exchange, wallet & custody infrastructure
Low-latency matching engines and hot/warm/cold custody architecture with multi-sig and HSM-backed key management.
Fiat-to-crypto rail integration
Crypto on/off-ramp providers wired into existing checkout and wallet flows alongside traditional payment rails.
Gas optimization & Layer-2 architecture
Storage packing, batch operations, and rollup/sidechain selection engineered around your actual throughput and cost targets.
Typical projects
Exchanges & brokerages
Spot and OTC trading, custody integration and compliance tooling.
Wallets & custody
Non-custodial, custodial and MPC wallets with policy engines.
Tokenisation
Stablecoins, security tokens and real-world-asset platforms.
Crypto payments
Merchant checkout, payouts and on/off-ramps.
Cost & timeline
How much does crypto & Web3 software cost and how long does it take?
Delivery time is agreed around your scope and split into milestones you sign off before paying. These are the factors that move the price most:
- Custody model (MPC, HSM, non-custodial)
- Chains and bridges supported
- Smart-contract audit scope
- Liquidity and exchange integrations
- Travel-rule and AML tooling
- Licensing jurisdiction
Technology
Chains
- Ethereum & L2s
- Solana
- Bitcoin
- Tron
Contracts
- Solidity
- Rust
- Foundry
- OpenZeppelin
Our delivery process
- 1
Regulatory & product discovery
Licence model, partners, compliance obligations and the core user journeys mapped with your team and counsel.
- 2
Architecture & threat model
Data model, security controls, integrations and hosting/residency decisions agreed before build.
- 3
Core build
Smart contracts, custody integration, trading or payment flows, and admin/compliance back office.
- 4
Security & compliance testing
Penetration testing, reconciliation and audit-trail checks, and evidence packs for auditors or partners.
- 5
Controlled launch & 24/7 support
Staged rollout, monitoring, incident response and regulator-ready reporting.
Standards we build to
- Virtual-asset licensing (e.g. MiCA, VARA)
- FATF travel rule
- AML/CFT and sanctions screening
- Smart-contract security audits
Live Demos
A selection of platforms we've designed and built
Real, working builds across fintech, compliance, healthcare, and commerce — the same engineering team would build your crypto & web3 project.
Nexa
SaaS-style product dashboard and workflow UI for a fintech platform.
Open live demoDebt Management
Debt management and collections tracking platform.
Open live demoAML Compliance Suite
Anti-money-laundering compliance and case-monitoring suite.
Open live demoUMARSOB Data
Android VTU/data-reseller platform with wallet, agent/referral system, and admin panel.
Open live demoHospital Management
Hospital/clinic management system covering patient records, appointments, staff, and billing.
Open live demoDMI CHW App
Offline-first Community Health Worker counseling app with a central management platform, built for an NGO client.
Open live demoHomemakers Pro
Enterprise operations system for a domestic staffing agency covering bookings, staff, and client management.
Open live demoE-Commerce (Multi-Locale)
E-commerce storefront demo with multi-language, locale-based support.
Open live demoMars
Legal web application prototype.
Open live demoBusiness value
What Crypto & Web3 does for your business
Benefits for your company
- Production-grade infrastructure. Exchanges, custody, wallets and smart contracts built with security review and compliance hooks.
- Faster launch. Reusable, audited building blocks shorten the path from idea to licensed launch.
- Partner-ready. Documentation and audit trails that liquidity providers and banks ask for.
How it can earn or save money
- Trading, listing and service fees. Venues, launchpads and custody services earn on volume and assets held.
- Token-based products. Issuance and tokenised assets open new fund-raising and product lines.
- B2B infrastructure sales. Wallet, payment and compliance APIs can be sold to other crypto businesses.
Illustrative revenue and saving lines, not guaranteed results: outcomes depend on your market, licences and execution.
How we work
How we deliver Crypto & Web3 Software
Every crypto & web3 software engagement follows the same staged, quality-gated process — shaped around your requirements. You see progress every day, review it every week, and give written sign-off at every milestone before any payment is due.
- 01
Discover
Scope signed off- Token & protocol workshops
- Chain & custody selection
- Regulatory scoping
- Signed scope
- 02
Design
Threat model OK- Contract architecture
- Tokenomics & access roles
- Key management design
- Threat model
- 03
Build
Testnet accepted- Solidity / Rust sprints
- Testnet deployments
- Gas optimisation
- Demo every sprint
- 04
Secure & Test
Audit cleared- Unit, fuzz & invariant tests
- Independent audit coordination
- Audit fixes verified
- UAT on testnet
- 05
Deploy
Mainnet live- Mainnet deploy via multisig
- Contract verification
- Monitoring & alerts
- Go-live checklist
- 06
Handover
Keys transferred- Role-based sessions
- Recorded walkthroughs
- Admin & ops runbooks
- Documentation handover
- 07
Support
Monitoring live- Dedicated engineer
- SLA helpdesk
- Patches & upgrades
- Quarterly reviews
Client sign-off at every milestone — you approve the working result before you pay.
You always know what was done today — and what happens next
A written daily update, a weekly work overview and a live demo every sprint — so there are no surprises at milestone time.
Every working day
- What was completed today
- What is planned for tomorrow
- Blockers and decisions needed from you
- Links to builds you can try
Every Friday, with a live call in your business hours
- Features completed and demo recordings
- Progress against the current milestone
- Risks, open questions and change requests
- Plan and priorities for next week
End of every sprint and milestone
- Working software demonstrated live
- Your feedback captured in the backlog
- Quality-gate checklist shared
- Written sign-off before any payment
Payment plan
Pay only for work you have accepted
Milestones are customised to your requirements — six or more is typical, and delivery time is agreed around your scope. Every payment after the advance is released only after you have seen the working result and given written sign-off. Here is an example plan:
| Payment | Milestone & acceptance | Share |
|---|---|---|
| Advance | Contract signing Signed contract; protocol workshops and chain selection. | 10% |
| Milestone 1 | Architecture approved Contract architecture, tokenomics and threat model signed off. | 15% |
| Milestone 2 | Testnet v1 First contracts deployed and demonstrated on testnet. | 15% |
| Milestone 3 | Feature-complete testnet All contracts, dApp and admin flows running end to end. | 15% |
| Milestone 4 | Audit passed Independent audit done; every finding fixed and re-verified. | 15% |
| Milestone 5 | Mainnet launch Multisig mainnet deployment and contract verification. | 15% |
| Milestone 6 | Handover Monitoring, runbooks, training and documentation handed over. | 15% |
| Total | 100% | |
- Number of milestones and splits set around your scope
- Every milestone is a working, demonstrated result
- No payment is due until you sign off
Warranty & annual support
Protected after launch — warranty and annual support for your Crypto & Web3 Software project
Go-live is where your crypto & web3 software product starts earning — so we stay accountable for it. Every project includes a free 90-day defect warranty. After that, the same team that built it keeps it secure, updated and running on a fixed annual fee agreed up front — no open-ended hourly billing, no surprise invoices.
Included free
90-day warranty
Any defect found in the first 90 days after go-live is fixed free of charge.
- Every delivered feature covered
- Fixes tested and deployed to production
- Same engineers who built it
Fixed-cost annual package
30% of project cost
per year for Annual Support & Maintenance, with a dedicated developer assigned to your crypto & web3 software platform. A fixed price, known in advance.
| Service | Included in the annual package |
|---|---|
| Dedicated developer | One named developer assigned to your product for fixes, enhancements and optimisation. |
| Bug fixes & security patches | Critical issues resolved within 24 hours; standard issues within 5 business days. |
| Upgrades & new releases | Framework, library and platform updates plus new versions of what we built, at no additional cost. |
| Helpdesk | Email and phone support for your team and administrators; 4-hour response for critical issues. |
| Backup monitoring | Daily backup checks and a quarterly restore test. |
| Security review | Periodic audit-trail review and security configuration check. |
| On-chain monitoring | Contract events, admin actions and unusual transactions watched with alerts. |
| Network & node upgrades | Hard forks, RPC and library changes tracked; contract upgrades run through the multisig. |
Source code & IP ownership
100% of the source code and IP is owned by you
For every custom crypto & web3 software project, upon full and final payment the complete source code and intellectual property are transferred to you — so you can host, maintain and enhance the system with any developer.
- Smart-contract source, tests and deployment scripts
- Contract ownership and multisig admin keys transferred to you
- Audit reports and dApp / admin source code
- Complete Git repository with full commit history
- Database schemas, migrations and seed data
- Configuration, CI/CD and deployment scripts
- API documentation and a deployment guide
No lock-in
No forced upgrades
No subscription trap
Your code lives in your own repository from the first commit.
Continuous enhancement
Launch is just the beginning — keep shipping with your own dedicated team
Your crypto & web3 software platform should get better every month, not stand still after go-live. Start with one dedicated developer working on your priorities across apps, dashboards and backend — and grow to a full team of developers and support members whenever your roadmap demands it.
Dedicated team, your way
From one developer to a full team
Pricing is based on the team members you need — tell us your requirements and we will quote your team.
- Start any time after launch
- Hire developers as you need them
- Scale up, scale down or pause
What your team can take on after launch
- New contracts, tokens or chains
- dApp and admin-panel improvements
- New wallet, bridge and exchange integrations
Need more hands? Add developers and support members as your requirements grow
Start with one person and add only the roles your crypto & web3 software roadmap needs — each is quoted to your requirements.
Development team
Smart-contract developer
Writes, tests and upgrades contracts in Solidity or Rust.
dApp developer
Builds the wallet-connected web interfaces for your contracts.
Backend developer
Adds the APIs, business logic and data models behind new features.
QA engineer
Writes and runs manual and automated tests before every release.
DevOps engineer
Keeps pipelines, environments and deployments fast and reliable.
Support team
L1 helpdesk support executive
First contact for your users and staff — logs, triages and resolves common issues.
L2 technical support engineer
Investigates bugs, data issues and integrations, and escalates to developers with full context.
On-chain operations support
Watches contracts, gas balances and admin transactions.
Wallet & transaction support
Helps users trace stuck, failed or mis-sent transactions.
Our Approach
Our approach to development methodologies
Our approach to custom software engineering draws on a range of methodologies, each selected to match the needs of your crypto & Web3 software project.
Agile Scrum
Best for: Evolving products
Two-week sprints with a working demo at the end of each, so crypto & Web3 software priorities can change as you learn from users.
Kanban
Best for: Continuous delivery & support
A visual flow of small tasks with work-in-progress limits — ideal for maintenance, integrations and post-launch improvements.
Fixed-scope (Waterfall-style)
Best for: Well-specified builds
Requirements signed off up front with a fixed timeline and price — best when scope is clear and change is unlikely.
Lean MVP
Best for: New ventures
Build the smallest crypto & Web3 software release that proves demand, measure it with real users, then invest where the data points.
DevOps & CI/CD
Best for: Every project
Automated tests, infrastructure-as-code and push-button deployments so releases are frequent, reversible and boring.
Security-by-design (DevSecOps)
Best for: Regulated & high-value systems
Threat modelling, dependency scanning and code review built into each sprint rather than a pen test at the end.
Why we're different
What sets Hurain Technologies apart
Plenty of agencies can build crypto & Web3 software. Here is what sets us apart for clients worldwide.
Engineering depth, not a reseller
Your crypto & Web3 software project is designed and built by our own in-house engineers — no hidden subcontracting chain between you and the people writing code.
Built for your market, not a template
Payments, tax, language and data-protection requirements for your target market are part of the design from day one instead of retrofitted after launch.
Transparent, senior-led delivery
A named project lead, a shared backlog, fortnightly demos and direct Slack access to the engineers — you always know what is being built and why.
Cost advantage without cutting corners
Delivering from India gives clients worldwide senior engineering at a fraction of typical onshore agency rates, with the same code-review, testing and security standards.
You own everything
Source code lives in your repository from the first commit; IP, infrastructure accounts and documentation transfer to you in full.
We stay after launch
Monitoring, updates and a support SLA mean the team that built your product is the team that keeps it running.
Flexible engagement models
How we work with crypto & Web3 software clients worldwide
Ways to work together, depending on how your team and roadmap are set up.
Dedicated Development Team
An extended team of crypto & Web3 software engineers, QA and architects working exclusively on your product, managed day-to-day by you with our engineering leadership behind them.
Best for: Long-term products and evolving roadmaps
Fixed-Cost Delivery
A clearly scoped crypto & Web3 software build with a defined timeline and price — ideal for a well-specified MVP, integration or launch product.
Best for: MVPs and clearly defined projects
Hybrid Engagement
Keep product and regulatory decisions close to your team while our specialists handle deep engineering remotely, with workshops or on-site visits at key milestones.
Best for: Enterprises and regulated businesses
Why businesses choose us
Why businesses choose Hurain Technologies
16+ years of engineering depth
Custom software engineering with in-house teams across web, mobile, cloud, AI, payments and blockchain.
Security-first by default
Encryption, least-privilege access, audit logs — and MPC/HSM custody and audited smart contracts where money is on-chain — designed in, not retrofitted.
Regulatory-aware architecture
Designed with your target market's regulatory direction in mind and built alongside your licensed local legal counsel.
Direct access, no layers
Direct Slack or Teams access to your development team during the build, and the same people for post-launch support.
Business benefits
What you gain
Faster time to market
An experienced crypto & Web3 software team with proven components means your first release ships in weeks, not quarters.
Security-first architecture
Secure from day one, rather than patched after an audit or incident.
Aligned compliance groundwork
Controls, logs and data handling built around your target market's requirements so reviews go faster.
Lower total cost of ownership
Clean, documented, tested code that your own team can maintain — plus post-launch monitoring and support.
What happens next
From your crypto & Web3 software enquiry to a working demo — in about a day
- 01Within 10 minutes
We respond to your enquiry
Send your crypto & Web3 software enquiry by form, email or WhatsApp — a few lines is enough. Our team replies within 10 minutes, any day, any time, to set up a meeting at a time that suits you.
- 02Requirements meeting
We understand your requirements
In a focused meeting we go deep on your users, features, integrations, timeline and budget — so we build exactly what your business needs. NDAs signed on request.
- 03Within 24 hours
You see a demo of your crypto & Web3 software
Within 24 hours of our meeting we prepare and share a demo — so you see your crypto & Web3 software taking shape before you commit to anything.
- 04As per your budget
We share a tailored proposal
A clear proposal for your crypto & Web3 software project with scope, milestones, team and timeline — shaped around your budget, with no hidden costs and no obligation.
Available 24×7 — three 8-hour shifts, every day
FAQ
Crypto & Web3 software: frequently asked questions
What does Hurain Technologies build for crypto & Web3?
How long does crypto & Web3 software development take?
How much does crypto & Web3 software development cost?
Will our contracts be ready for a third-party security audit?
Can you connect our token or exchange platform to banking rails?
How do you secure custody funds?
Which chains and standards do you build on?
Can you take over an existing blockchain codebase from another vendor?
Do you build the complete crypto & Web3 solution, or only integrate with what we already use?
We are not sure about our budget yet. Can you still help?
By location
Crypto & Web3 software by country and city
Each location page covers local regulation, payment methods, tax, data-protection law and 24/7 support.
Priority markets
Major cities
All countries
Related solutions
Related engineering services
Other industries
Building for crypto & Web3?
Share your idea — we respond in 10 minutes, share a demo within 24 hours of our meeting, and a proposal as per your budget.