Hire Solana / Solidity Developer

Blockchain is the part of my stack that filters serious clients from tire-kickers fastest. If you want a smart contract that holds real money, you want production discipline — typed bindings, gas-profiled functions, 90%+ branch coverage, audit-ready code. I am Ignacio (IGNAX), Spain-born, Paraguay-based, solo full-stack developer with five-plus years of shipped Solana and EVM work. I have built a multiplayer blockchain game on Solana and a P2P crypto exchange on Polygon — both live, both real money.

Who is this service for?

  • Founders launching a Solana program or EVM smart contract who want one senior owner from spec to mainnet.
  • Teams whose Solidity contractor disappeared at 70% and need someone to finish a real audit-ready codebase.
  • DeFi, gaming, NFT, and on-chain SaaS projects that need a full-stack dev — contract + indexer + frontend + wallet flow.
  • Agencies that need a senior Solana/Solidity subcontractor under NDA.

If the project is "we want to do NFTs" without a clear product or distribution plan, this is too early. Come back with the product thesis.

What is included in a blockchain build?

  • Discovery + one-page spec including chain choice, mechanism design notes, and audit-readiness target.
  • Smart contracts: Solana programs in Anchor (Rust) or EVM contracts in Solidity (Foundry).
  • Static-analysis pass: Slither + Mythril for EVM; cargo-audit + anchor verify for Solana.
  • Branch coverage 90%+ in Foundry or Anchor tests, with fuzzing on critical paths.
  • Gas / compute-unit profiling documented in the README.
  • Typed frontend bindings via Anchor IDL (Solana) or wagmi+viem (EVM).
  • Frontend: SvelteKit or React, wallet adapter integration, real-time transaction states.
  • Indexer: Helius/Triton for Solana; Goldsky, Ponder, or a custom subgraph for EVM.
  • Multi-sig setup: Squads (Solana) or Safe (EVM) with documented signer set and threshold.
  • Mainnet deploy on your own treasury and signer keys. You own everything from commit one.
  • 14-day post-launch fix window for non-spec bugs.

How does the build process work?

  1. Discovery call (free, 30 minutes). Bring the mechanism design — what value the contract holds, how it is moved, what attack surface you are worried about.
  2. One-page spec + fixed quote inside 48 hours. Mechanism-design red flags are raised here, not later.
  3. Testnet build (weeks 1–4). Daily commits, Friday Loom showing the contract running on devnet/testnet with real wallets.
  4. Mainnet deploy (week 5–8). Multi-sig wired, treasury procedure documented, frontend pointed at mainnet.
  5. Handover. 90-minute call covering deploys, key custody, upgrade procedure (if applicable), and incident response. Written runbook in the repo.

Working hours: Mon–Fri, 8:00–17:00 PYT (GMT-3). Weekends off. Overlap with US East 7:00–16:00 EST, with Madrid 13:00–22:00 CET.

What stack do you ship with and why?

  • Solana / Anchor (Rust) — the modern Solana toolchain. IDL-driven typed bindings, easier upgrades, the program model most production projects use. See the Anchor framework documentation.
  • Solidity + Foundry — Foundry's forge is the fastest dev loop in EVM today. Hardhat works too, I match what your team uses. See the Foundry book.
  • OpenZeppelin contracts — battle-tested base implementations for ERC-20, ERC-721, AccessControl. I do not re-implement what OZ has audited.
  • Helius / Triton (Solana RPC) or Alchemy / QuickNode (EVM) — managed RPC, no DIY indexer infra.
  • wagmi + viem (EVM frontend) or @solana/web3.js + Anchor SDK — typed, modern, supported.
  • Slither + Mythril (EVM) / cargo-audit + anchor verify (Solana) — automated security pre-checks before any external audit.

How much does a blockchain build cost?

Pricing band: $5,000–$25,000 USD (Gs 30.7M–153.5M). The lower half covers a focused single-contract build with a clean frontend — say, a custom staking program or a niche NFT mint. The upper half covers multi-contract protocols (e.g., a P2P exchange with order books, escrow, dispute resolution) with indexer, full audit prep, and multi-sig treasury. Hourly outside that band: $50–$80 USD/hr (premium reflects the security bar). PYG values approximate, recalculated quarterly. Rate as of 2026-05-27: Gs 6,136.82 / USD. For chain-choice tradeoffs see Solana vs Polygon for dApps.

For agencies — white-label blockchain development

Blockchain is the rarest subcontract I see agencies need, and the highest-margin when it comes up. Day-rate $240–$560 USD/day (often the upper half for blockchain work). NDA-friendly, deliverables under your brand. I sign your paperwork and stay invisible to the end client. EN/ES bilingual coverage included.

What does the launch look like?

I deploy to mainnet from your own wallet — never mine. Multi-sig is wired before any value goes into the contract. The frontend goes live on your own Vercel, Cloudflare, or AWS account. You own the GitHub repo from commit one. After launch I run a 90-minute handover covering key custody, multi-sig proposals, deploy procedure, and incident response. Written runbook in the repo. Two weeks of free in-scope fixes follow.

What about audits?

I do not perform formal third-party audits — those are best left to firms like OtterSec (Solana) or Trail of Bits / Spearbit (EVM). What I do is prepare the codebase so external auditors find substantively less to fix. That means: clean static-analysis runs, high branch coverage, fuzzing on critical paths, documented invariants, and a README the auditor can read in 30 minutes. Audit costs typically come down meaningfully when the codebase is prepped — the auditors say so themselves.

Ready to talk? Email hello@ignax.dev with a one-paragraph product thesis. I reply within one business day.

Working hours: Mon–Fri, 8:00–17:00 PYT (GMT-3). Weekends off. Overlap with US East 7:00–16:00 EST, with Madrid 13:00–22:00 CET.

Pricing

USD
$5,000–$25,000
PYG
Gs 30.7M–Gs 153.5M
Timeline
3–8 weeks

PYG values approximate, recalculated quarterly. Rate as of 2026-05-27: Gs 6,136.82 / USD.

For agencies

Available as a white-label senior subcontractor. Standard NDAs welcome. Day-rate option: $240–$560 USD/day depending on stack.

Email hello@ignax.dev

Frequently asked questions

Solana or EVM (Polygon, Base, Arbitrum)? How do I choose?

Solana when transaction cost and speed matter — games, micropayments, high-frequency trading apps, NFT-heavy mints. EVM when you need the largest tooling and liquidity ecosystem — DeFi, governance tokens, anything that needs to interoperate with Ethereum mainnet. I have shipped production on both. The full tradeoff is documented in [Solana vs Polygon for dApps](/articles/solana-vs-polygon-dapps).

Do you write audit-ready Solidity and Anchor code?

Yes. Contracts pass the standard static-analysis suite (Slither, Mythril for EVM; cargo-audit, anchor verify for Solana) before any external audit, and ship with 90%+ branch coverage in Foundry or Anchor tests. I do not perform formal audits myself — those require dedicated firms like Trail of Bits or OtterSec. I prepare the codebase so external auditors find substantively less to fix, which lowers your audit cost.

Will you also build the frontend and wallet integration?

Yes. Full-stack is the default. SvelteKit or React frontend, wallet adapter (Phantom, Solflare, MetaMask, WalletConnect, Coinbase Wallet), typed contract bindings (Anchor IDL or wagmi+viem), real-time UI for transaction states. I do not hand you a contract and disappear — you get a working product end-to-end.

What about gas optimization?

Standard practice. On EVM I bench every external function with Foundry's gas reports and target sub-100k gas for hot paths where feasible. On Solana the equivalent is compute-unit budget — Anchor accounts are packed tightly, instructions kept under 200k CU when possible. I document the gas/CU profile in the README so future devs see the cost targets.

Can you help with token launches, airdrops, or NFT collections?

Token launches and airdrops, yes — with a strong note that mechanism design matters more than the contract. I will push back on vesting schedules or distribution mechanics I think will harm the project. NFT collections, yes — I have shipped on Solana (Metaplex Token Metadata + Candy Machine) and EVM (ERC-721A for gas-efficient mints). Off-chain art and metadata pipelines included.

Do you handle treasury, multi-sig, and operational security?

Multi-sig setup, yes — Squads on Solana, Safe (formerly Gnosis Safe) on EVM. I document the signer set, threshold, and proposal workflow in the runbook. Operational security beyond multi-sig (key custody, HSMs, dedicated security ops) is outside my scope; I will refer you to specialists when the project needs that level.

Can you work under our agency's NDA and white-label brand?

Yes. White-label blockchain dev is a clean subcontract — most agencies do not keep a full-time Solana/Solidity specialist on staff. Day-rate $240–$560 USD/day, NDA-friendly, deliverables under your brand. I stay invisible to the end client. EN/ES bilingual coverage included.

What happens after launch?

Two weeks of free in-scope bug fixes are included. Smart contracts on mainnet are immutable by design, so post-launch work is usually limited to frontend, indexer, and operational tooling. For protocols that need ongoing upgrades I prefer transparent upgradeable patterns (UUPS proxies on EVM, program upgrades behind multi-sig on Solana) — discussed in the spec, never bolted on later.

Email hello@ignax.dev

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