NFT Collection Development
We build ERC-721 and ERC-1155 collections with provable randomness, allowlist mechanics, phased mint logic, and royalty enforcement compatible with major marketplaces.
Learn moreOur Services
NFT Development & Engineering
Production-grade NFT contracts, marketplaces, and infrastructure - engineered for royalty enforcement, marketplace compatibility, and brand-safe operation at scale.
200+
NFT collections deployed across networks
$640M+
Aggregate primary sale volume supported
50+
Marketplaces and brand programmes shipped
8+
Years of NFT engineering experience
Our services
NFT Development Services
Nine NFT engineering disciplines - from collection contracts and marketplaces to royalty infrastructure, gaming assets, and RWA-backed tokens - each scoped independently and engineered to enterprise production standards.
Next step
Ready to scope your NFT programme?
Share your collection model, target chains, and launch timeline - we respond within one business day with a scoped recommendation, not a sales pitch.
Delivery scope
Six deliverables, zero ambiguity.
Every engagement produces a defined artifact set. Scope is agreed upfront; nothing is a billable surprise.
01
Collection architecture & metadata strategy
Standard selection, metadata storage decision (on-chain, IPFS, Arweave), and reveal mechanics defined before contract code is written.
02
Royalty & access control specification
EIP-2981 implementation, operator filter strategy, and role hierarchies for mint/burn/admin paths documented and reviewed.
03
Mint mechanics & sale infrastructure
Allowlist logic, phased mint windows, anti-bot guards, and refund-safe sale contracts built and tested against adversarial mint scenarios.
04
Audit-ready contract codebase
Natspec-complete contracts with invariant tests, fuzz suites, and gas profiling - handed to your audit firm or ours with no preparation gap.
05
Deployment & verification pipelines
Deterministic multi-chain deploys, block explorer verification, marketplace listing prep, and multisig ceremony scripts for treasury custody.
06
Operational runbooks & launch playbook
Documented procedures for reveals, royalty management, emergency pause, and marketplace operations - handed to your brand and ops teams, not kept in our heads.
Tooling stack
Our NFT Development Technology Stack
Chosen for marketplace compatibility, royalty enforcement, and production track record across NFT launches.
Default stack
Solidity · Foundry · OpenZeppelin · IPFS · Chainlink VRF
Programming languages
Solidity
EVM NFTs
Rust
Solana & Metaplex
Move
Aptos & Sui NFTs
Vyper
Audit-friendly EVM
TypeScript
Tooling & deploy scripts
JavaScript
Marketplace UI
Python
Trait generation & rarity
Go
Indexing services
Cairo
StarkNet NFTs
GLSL
Generative on-chain art
NFT standards & frameworks
ERC-721
Standard NFTs
ERC-1155
Multi-token / semi-fungible
ERC-2981
Royalty standard
ERC-4907
Rentable NFTs
ERC-6551
Token-bound accounts
ERC-721A
Gas-optimised mint
Metaplex
Solana NFT standard
OpenZeppelin
Secure libraries
Solmate
Gas-optimised primitives
Operator Filter
Royalty enforcement
Networks & marketplaces
Ethereum
L1 mainnet launches
Polygon
Low-fee minting
Arbitrum
Optimistic rollup
Base
Coinbase L2
Optimism
OP Stack
Solana
Metaplex ecosystem
Avalanche
Subnet collections
OpenSea
Marketplace integration
Blur
Pro-trader marketplace
Magic Eden
Multi-chain marketplace
Tools & integrations
Foundry
Test & deploy framework
Hardhat
Dev environment
Chainlink VRF
Provable randomness
IPFS
Decentralised metadata
Arweave
Permanent storage
Pinata
IPFS pinning
The Graph
Indexing & subgraphs
Tenderly
Debug & monitor
Reservoir
Marketplace aggregation
Gnosis Safe
Treasury multisig
Trust & diligence
Audit Partner Ecosystem
We coordinate audit and code review with recognised third-party firms your stakeholders, marketplaces, and brand partners already trust - a critical signal for major collection launches and enterprise IP holders.
Third-party names and marks belong to their respective owners.
Partner with us
Built for Brands That Can't Afford a Failed Mint.
NFT launches are unforgiving. A failed mint embarrasses your brand and refunds become an operational nightmare. A royalty bypass costs your creators ongoing revenue. A metadata error becomes permanent the moment it hits IPFS. We build for teams who treat NFT launches as brand infrastructure - with adversarial mint testing, royalty enforcement, and operational playbooks from day one.
Why Bitronix
What Makes Bitronix Different
Not a feature list. Six specific reasons brand teams, gaming studios, and marketplace founders choose Bitronix for launches that must clear audit, satisfy marketplaces, and protect creator revenue.
01
Mint-Proof Engineering
We don't ship contracts that haven't been stress-tested against bot armies, sniping scripts, and gas-war scenarios. Every mint goes live having survived adversarial simulation - so your launch doesn't end up as a Twitter post-mortem.
02
Royalty Enforcement By Default
We implement EIP-2981, operator filters, and on-chain payout splits as standard - not as a paid add-on. Creator revenue protection is engineered in from day one, with documented marketplace compatibility for OpenSea, Blur, Magic Eden, and aggregators.
03
No Black-Box Development
You see every architectural decision, every test result, and every threat model output as we build. Your brand, legal, and IP teams get a live documentation trail they can review at any phase.
04
Multi-Chain Execution
We deploy across Ethereum, Polygon, Base, Solana, and Layer 2s - driven by your audience, gas-cost strategy, and marketplace presence, not our tooling preferences. Cross-chain ownership reconciliation is built in.
05
Marketplace & Brand Aware
Most firms hand over contracts and disappear. We prepare the metadata schemas, royalty configurations, and operational documentation your marketplaces, IP licensors, and brand-safety teams will demand before they engage.
06
A Track Record You Can Diligence
Our case studies are public, our tech stacks are listed, and our audit partners are named. Read the architecture, check the chains, verify the firms. We give you the evidence to decide, not asks to trust.
Security & testing methodology
How We Make NFT Contracts Mint-Safe Before Launch.
Most failed mints, royalty bypasses, and metadata disasters are preventable with disciplined engineering. We eliminate the preventable ones so your launch hits the trending feed for the right reasons.
01
Adversarial Mint Modelling
Before contracts are written, we model your mint mechanics against bot armies, gas-war scenarios, allowlist sniping, and reentrancy through hook callbacks. Mint flow is engineered to survive contact with hostile mempools - not just unit-test happy paths.
02
Threat Modelling for NFT Issuance
We document every privileged role, mint boundary, royalty path, and metadata mutation vector. Attack surfaces specific to NFTs - operator-filter bypass, metadata poisoning, signature replay on allowlists - are mapped before production code lands.
03
Invariant-Based Testing
We define what must always be true: total supply caps, allocation per wallet, royalty BPS bounds, metadata immutability post-reveal. These are encoded as on-chain invariants tested via Echidna and Foundry fuzzing across millions of execution paths.
04
Metadata & Reveal Validation
Reveal logic, IPFS pinning strategies, and metadata update paths are tested against the irreversibility of on-chain state. Off-by-one errors, race conditions in reveal timing, and IPFS gateway failure modes are caught before they freeze your collection's identity on-chain.
05
Marketplace Compatibility Pre-Checks
Before audit, we run contracts against the compatibility checks major marketplaces apply - OpenSea creator earnings, Blur royalty rules, ERC-2981 detection, operator-filter compliance. Findings are resolved before external review starts.
06
Audit Preparation Pack
Every engagement produces a structured handoff: natspec-complete code, documented invariants, test coverage reports, mint simulation outputs, and a threat model your auditors can diligence end to end. External reviewers consistently cite preparation quality as the single biggest factor in audit speed and cost.
Our methodology is available to review before you engage.
Industries
NFT Programmes Across Industries
Nine industries where NFTs are replacing legacy ownership, licensing, and access primitives - from gaming economies and brand collectibles to ticketing and tokenised collectibles.
Gaming
Player-owned in-game assets, cross-game interoperability, tournament reward NFTs, and equipment-composition systems - engineered for the throughput live gaming economies demand.
Learn moreGovernment
Verifiable credentials, public certification NFTs, and tamper-evident record issuance - deployed on permissioned or hybrid networks with regulator-grade audit trails.
Learn moreMedia & Entertainment
Creator-issued collectibles, fan engagement NFTs, royalty-bearing music tokens, and IP-licensed brand collaborations - with on-chain payout logic and platform-agnostic ownership records.
Learn moreIdentity Management
Soulbound credentials, professional certification NFTs, and verifiable membership instruments - non-transferable by design, portable across systems by default.
Learn moreSupply Chain
Authenticity-bound product NFTs, luxury goods provenance, and tamper-evident shipping certificates - linked to off-chain attestations through audited oracle pathways.
Learn moreLending
NFT-collateralised lending positions, fractionalised debt instruments, and floor-priced liquidation engines - engineered for composability with major DeFi NFT-finance protocols.
Learn moreReal Estate
Property-fraction NFTs, deed-anchored ownership records, and rental-rights tokens (ERC-4907) - issued under regulated transfer restrictions with title verification rails.
Learn moreHealthcare
Patient-controlled health credentials, clinical-trial participation NFTs, and consent-bound research access tokens - designed for HIPAA and GDPR compatibility from issuance.
Learn moreInsurance
Policy NFTs, parametric coverage instruments, and catastrophe bond fractions - settling against oracle-verified events without manual claims reconciliation.
Learn moreExecution model
Six Phases, One Accountability Chain.
No handoffs that lose context. The team that scopes your NFT programme ships it and supports it post-launch. Every phase produces a defined artifact - nothing moves forward without it.
Phase 1: Discovery
Timeline: 3–5 business days
What happens
Collection model, utility mechanics, target chains, and marketplace strategy mapped before architecture decisions.
Deliverables
- Scope document with in/out boundaries
- Draft collection specification
- Chain and standard selection rationale
- Marketplace and royalty strategy register
- Engagement timeline with phase gates
Phase 2: Architecture & Mint Design
Timeline: 2–4 weeks
What happens
Contract structure, mint mechanics, royalty paths, and metadata strategy documented. Adversarial mint scenarios simulated.
Deliverables
- Contract architecture specification
- Role and permission matrix
- Mint simulation report
- Metadata storage and reveal plan
- Integration interface contracts (marketplaces, oracles, indexers)
Phase 3: Development
Timeline: 3–8 weeks depending on scope
What happens
Collection, marketplace, and supporting contracts built against the spec with continuous invariant testing and fuzz campaigns.
Deliverables
- Production contract codebase with full natspec
- Unit and integration test suite (target 100% line coverage)
- Invariant and fuzz test suite
- Gas profiling report
- Deployment scripts with deterministic addresses
Phase 4: Audit
Timeline: 2–6 weeks depending on audit firm availability
What happens
Contracts submitted to chosen firm; findings triaged and remediated through to sign-off. Mint mechanics and royalty paths get particular attention.
Deliverables
- Audit preparation pack
- Findings triage report
- Root-cause fix per critical/high finding
- Regression test per finding
- Final audit certificate coordination
Phase 5: Launch
Timeline: 3–5 business days
What happens
Deterministic multi-chain deployment, multisig treasury ceremony, marketplace listing, and reveal coordination.
Deliverables
- Deployment transaction record with verified bytecode
- Block explorer verification confirmation
- Multisig ceremony script and execution log
- Marketplace listing confirmation
- Post-deployment smoke test report
Phase 6: Support
Timeline: Ongoing - retainer or per-incident
What happens
Reveal operations, royalty management, secondary-market monitoring, and incident response under defined SLAs.
Deliverables
- Marketplace and on-chain monitoring dashboard
- Incident response playbook with SLA tiers
- Scheduled reveal/airdrop operation scripts
- Quarterly royalty enforcement review
- Change request process for contract modifications
Timelines assume responsive client feedback at phase gates. Audit firm availability is the most variable factor - reserve audit slots 4–6 weeks in advance of your target mint date. Brand approvals, IP licensing reviews, and marketplace verification windows often constrain the schedule; share these dependencies during Discovery.
How we partner
Engagement Models
Three ways to engage - structured around how your team works, not how we prefer to sell. Every model operates on the same delivery standard, the same engineering team, and the same accountability chain.
01
Dedicated Development Team
3–12 months · 2–5 engineers · Full-time exclusive
Your NFT programme gets a dedicated smart contract engineer, marketplace engineer, and DevOps specialist working exclusively on your collection or venue - no context-switching. Suited to full collection launches, marketplace builds, and post-mint operational coverage.
Best for: Major collection launches, white-label marketplaces, long-runway gaming asset programmes
02
Team Extension
1–6 months · 1–3 engineers · Integrated with your team
We embed with your brand, creative, and engineering teams - working in your repos and on your marketplace partners' technical reviews. You retain product ownership; we bring mint-hardening, royalty enforcement, and metadata pipeline depth you don't carry in-house yet.
Best for: In-house teams approaching mint, studios extending live collections, brands adding NFT surfaces
03
Project-Based
4–16 weeks · Fixed deliverables · Fixed price
Defined scope and price agreed before work begins. Collection launches, marketplace builds, audit readiness sprints, and standalone generative mint modules are common project-based formats - milestone gates and no billable surprises.
Best for: Collection launches, marketplace builds, royalty retrofit programmes, migration cutovers
Not sure which model fits? Book a 30-min scoping call → - we'll recommend the right structure based on your team, timeline, and NFT programme scope.
Case studies
Real work, real results.
Brand and IP collections, white-label marketplaces, gaming asset layers, and luxury provenance rails - programmes you can diligence end to end. Case narratives are placeholders; verify before publish.
Aurora Genesis Collection
10K PFP collection with phased mint, on-chain traits, and EIP-2981 royalty enforcement.
Aurora is a brand-forward generative collection: phased mint windows, allowlist mechanics, provably fair trait assignment, and marketplace-ready metadata - engineered for sustained secondary royalty capture.
$18M primary sale across 4 mint phases with zero failed mints and 7.5% sustained royalty capture across 14 months.
Tech stack
- Solidity
- Foundry
- OpenZeppelin
- IPFS
- Ethereum
Meridian Marketplace
White-label NFT marketplace with custom fee logic and creator royalty enforcement.
Meridian is a white-label trading venue: listings, offers, auctions, and settlement with fee routing and royalty-aware order paths - designed so creators keep expected economics across aggregators.
$92M trading volume processed across 200+ collections with zero royalty bypass incidents.
Tech stack
- Solidity
- Hardhat
- The Graph
- Reservoir
- Polygon
Helix Game Assets
Cross-game asset interoperability layer with ERC-1155 equipment and rental mechanics.
Helix equips multiple titles with shared asset semantics: composable equipment slots, tournament reward mints, and rental flows that keep studio control where required while preserving player ownership.
4.2M in-game assets minted across 6 game titles with cross-game ownership reconciliation.
Tech stack
- Solidity
- ERC-1155
- ERC-4907
- LayerZero
- Polygon
Harbor Luxury Provenance
Authenticity NFTs for luxury goods with attestation oracles and brand-controlled minting.
Harbor binds high-value physical goods to on-chain certificates: attestation oracles, brand-gated mint authorities, and transfer rules that preserve provenance without leaking sensitive supply-chain detail.
$28M of luxury goods authenticated across 3 brand partners with regulator-observable audit trails.
Tech stack
- Solidity
- Hardhat
- Chainlink
- IPFS
- Ethereum
Testimonials
What our clients are Saying
Discover real stories from clients who have improved delivery, audit readiness, and production operations with our team.
Alexandra Chen
Chief Technology Officer · Northline Markets
Bitronix redesigned our entire settlement architecture. What used to take our ops team four days of manual reconciliation now closes in under fifteen minutes with full audit lineage. The delivery discipline was unlike anything we had seen from an external team.
Daniel Okonkwo
Head of Digital Assets · Helix Capital Partners
We engaged Bitronix to tokenize a $180M real estate portfolio on-chain. They handled investor reporting, compliance checkpoints, and lifecycle events end-to-end. The platform launched on schedule and has processed every redemption without a single incident.
[Founder Name]
Founder · [Collection/Brand]
Bitronix stress-tested our mint against bot scenarios we hadn't even considered. On launch day, our 10K collection sold out in 11 minutes with zero failed transactions and zero refund requests. The preparation showed up exactly when it mattered.
James Whitfield
General Counsel · Meridian DeFi
We needed a smart contract audit that could actually withstand scrutiny from our legal and compliance teams - not just a checkbox report. Bitronix delivered findings with clear severity classification, remediation paths, and documentation our lawyers could read.
Dr. Sarah Mensah
Chief Digital Officer · Veracure Health Systems
Bitronix built our patient data consent layer on a private blockchain in twelve weeks. They understood HIPAA constraints without us having to explain them twice, and the identity integration with our existing IAM stack was seamless. Exactly what a regulated environment requires.
Marcus Liang
CTO · Axiomatic Energy
Our previous vendor gave us a prototype. Bitronix gave us a production system - with runbooks, observability dashboards, and on-call support from day one. Eighteen months in, our blockchain infrastructure has maintained 99.98% uptime across three regions.
Elena Vasquez
Risk & Controls Lead · Summit Treasury
As risk and controls lead, I cared about traceability more than chain hype. Bitronix mapped every privileged role, emergency pause path, and upgrade story into documentation our regulators could follow. That clarity was the win.
Alexandra Chen
Chief Technology Officer · Northline Markets
Bitronix redesigned our entire settlement architecture. What used to take our ops team four days of manual reconciliation now closes in under fifteen minutes with full audit lineage. The delivery discipline was unlike anything we had seen from an external team.
Daniel Okonkwo
Head of Digital Assets · Helix Capital Partners
We engaged Bitronix to tokenize a $180M real estate portfolio on-chain. They handled investor reporting, compliance checkpoints, and lifecycle events end-to-end. The platform launched on schedule and has processed every redemption without a single incident.
[Founder Name]
Founder · [Collection/Brand]
Bitronix stress-tested our mint against bot scenarios we hadn't even considered. On launch day, our 10K collection sold out in 11 minutes with zero failed transactions and zero refund requests. The preparation showed up exactly when it mattered.
James Whitfield
General Counsel · Meridian DeFi
We needed a smart contract audit that could actually withstand scrutiny from our legal and compliance teams - not just a checkbox report. Bitronix delivered findings with clear severity classification, remediation paths, and documentation our lawyers could read.
Dr. Sarah Mensah
Chief Digital Officer · Veracure Health Systems
Bitronix built our patient data consent layer on a private blockchain in twelve weeks. They understood HIPAA constraints without us having to explain them twice, and the identity integration with our existing IAM stack was seamless. Exactly what a regulated environment requires.
Marcus Liang
CTO · Axiomatic Energy
Our previous vendor gave us a prototype. Bitronix gave us a production system - with runbooks, observability dashboards, and on-call support from day one. Eighteen months in, our blockchain infrastructure has maintained 99.98% uptime across three regions.
Elena Vasquez
Risk & Controls Lead · Summit Treasury
As risk and controls lead, I cared about traceability more than chain hype. Bitronix mapped every privileged role, emergency pause path, and upgrade story into documentation our regulators could follow. That clarity was the win.
Alexandra Chen
Chief Technology Officer · Northline Markets
Bitronix redesigned our entire settlement architecture. What used to take our ops team four days of manual reconciliation now closes in under fifteen minutes with full audit lineage. The delivery discipline was unlike anything we had seen from an external team.
Daniel Okonkwo
Head of Digital Assets · Helix Capital Partners
We engaged Bitronix to tokenize a $180M real estate portfolio on-chain. They handled investor reporting, compliance checkpoints, and lifecycle events end-to-end. The platform launched on schedule and has processed every redemption without a single incident.
[Founder Name]
Founder · [Collection/Brand]
Bitronix stress-tested our mint against bot scenarios we hadn't even considered. On launch day, our 10K collection sold out in 11 minutes with zero failed transactions and zero refund requests. The preparation showed up exactly when it mattered.
James Whitfield
General Counsel · Meridian DeFi
We needed a smart contract audit that could actually withstand scrutiny from our legal and compliance teams - not just a checkbox report. Bitronix delivered findings with clear severity classification, remediation paths, and documentation our lawyers could read.
Dr. Sarah Mensah
Chief Digital Officer · Veracure Health Systems
Bitronix built our patient data consent layer on a private blockchain in twelve weeks. They understood HIPAA constraints without us having to explain them twice, and the identity integration with our existing IAM stack was seamless. Exactly what a regulated environment requires.
Marcus Liang
CTO · Axiomatic Energy
Our previous vendor gave us a prototype. Bitronix gave us a production system - with runbooks, observability dashboards, and on-call support from day one. Eighteen months in, our blockchain infrastructure has maintained 99.98% uptime across three regions.
Elena Vasquez
Risk & Controls Lead · Summit Treasury
As risk and controls lead, I cared about traceability more than chain hype. Bitronix mapped every privileged role, emergency pause path, and upgrade story into documentation our regulators could follow. That clarity was the win.
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Ready to launch a collection your brand and marketplaces will trust?
Share your collection model, target chains, and mint window - we respond within one business day with a scoped recommendation.
FAQ
Frequently Asked Questions
Straight answers for brand teams, founders, and procurement teams - before you enter diligence.
Contract development is our core practice - but we don't operate in isolation from your creative team. We integrate directly with your art director, generative artists, or brand agency to handle trait composition, rarity weighting, metadata schema design, and reveal mechanics. We don't replace your creative direction; we engineer the on-chain infrastructure that makes it work - including provable rarity via Chainlink VRF, IPFS or Arweave metadata pinning, and marketplace-compatible JSON schemas. If you don't have a creative team yet, we can recommend partners we've worked with on prior collections; if you do, we slot into your existing workflow without forcing tooling changes. The deliverable from our side is always: contracts that mint exactly the assets your brand approved, with metadata that resolves correctly across every marketplace your collection will list on.
ERC-721, ERC-1155, ERC-2981, ERC-4907, ERC-6551, ERC-721A, Metaplex on Solana, and custom extensions where marketplace requirements allow. We deploy across Ethereum, Polygon, Arbitrum, Optimism, Base, Avalanche subnets, and Solana - chain selection follows your audience, gas strategy, and marketplace roadmap.
We implement EIP-2981 with documented basis points, operator-filter registries where your royalty policy requires them, and on-chain payout routing for multi-creator splits. Compatibility matrices for OpenSea, Blur, Magic Eden, and major aggregators are delivered with your launch pack.
Yes - listing, offer, auction, and settlement contracts; indexer-backed APIs; and brand-facing front ends. Fee logic, creator verification hooks, and moderation workflows are scoped to your compliance and brand-safety requirements.
We recommend storage strategy against your permanence, cost, and mutability requirements: fully on-chain for small payloads, IPFS with pinning SLAs for most PFP collections, Arweave for permanence-critical references - with gateway fallbacks and integrity checks documented before mint.
Yes - companion contracts across EVM L2s, Solana counterparts, and bridge messaging (e.g. LayerZero, Wormhole) with supply and ownership reconciliation so marketplaces and explorers show consistent collection state.
Allowlist signatures with expiry and nonce discipline, per-wallet caps, phased windows, optional gas refunds, and mempool-aware testing against sniper scripts. Mechanics are fuzzed under adversarial conditions before mainnet.
We ship the audit preparation pack, coordinate with your firm or our network, triage every finding, implement root-cause fixes, and add regression tests through sign-off - with emphasis on mint paths and royalty logic.
A collection-plus-marketplace programme from Discovery through audit-ready deploy often runs 10–18 weeks depending on generative complexity, chain count, and audit availability. Typical team: lead NFT engineer, security-focused reviewer, and DevOps for pinning and deploy pipelines - scaled per scope.
Useful inputs: collection size and mint mechanics, target chains, marketplace listing plan, royalty recipients and splits, creative pipeline (generative vs curated), IP licensing constraints, and target mint date. We respond within one business day with a scoped recommendation.