Solidity and Web3 engineers who have shipped contracts holding real value, and had them audited. Profiles within 24 hours.
Trusted by teams worldwide
Six blockchain specialisms, staffed by engineers who understand that a deployed contract is very hard to fix.
On-chain code is immutable and public, so we screen for caution over speed, alongside our API and custom software teams.
Reentrancy, access control and arithmetic handled as defaults, not review findings.
Storage layout and loop patterns chosen with transaction cost in mind.
Invariant and fuzz testing, because unit tests alone do not find economic exploits.
A considered position on immutability versus proxies before deployment, not after.
Code and documentation prepared so an external audit finds less and costs less.
Indexers, RPC reliability and backends, because most of the product is not on-chain.
One call about your mechanism, your chains and your audit timeline tells you the right team shape, what needs auditing and a rate range.
Get Your Scoping CallFree · No obligation · Delivered within 48 hours
Three steps and about forty hours, rather than a hiring process measured in months.
We discuss your stack, backlog, seniority needs and working hours.
You get interview-ready profiles matched to the requirement within 24 hours.
You interview and choose, with a 15-day risk-free trial on every placement.
Onboarding into your tools, rituals and codebase, with our architect on hand.
Ongoing delivery with the flexibility to scale the team up or down.
Interview-ready candidates matched to your chain and stack.
Ethereum, Polygon, Arbitrum, Optimism, Base and BNB Chain.
Code written to survive external review, not just to compile.
Replace at no cost if the fit is wrong.
Real products, real users, real numbers, across health, mobility, delivery and education.
Mood tracking, guided sessions and personalised wellness plans in a warm, calming experience.
Live driver tracking, surge-aware fare estimation and multi-payment support in a fast, reliable app.
Live order tracking, smart dispatch and route optimisation that cut delivery times across 200+ restaurants.
Coach matching, personalised study plans and adaptive progress tracking for 10K+ students.
Six on-chain use cases with genuinely different risk profiles.
Contracts that custody real value.
Minting, marketplaces and royalties.
Real-world assets represented on-chain.
On-chain decision making.
Payments and loyalty on-chain.
Reviewing what is already deployed.
“Appther built our student competition app exactly the way we envisioned it: easy registration, smooth judging, and real-time results that keep participants engaged.”
“Building a mental health app means every detail has to be handled with care, and Appther got that from day one. The product feels warm, simple, and genuinely helpful.”
“Appther exceeded every expectation, on time and on budget, and the final product has been instrumental in scaling our business. A rare engineering partner.”
“Implementing an ERP across our operations felt daunting at first, but Appther made the transition seamless. Every department now works off a single source of truth.”
Field notes from real builds. No hype, just what worked and what didn't.
The same handful of vulnerability classes, over and over.
Choosing before deployment, because you cannot choose after.
Invariant testing that catches economic exploits.
Indexers, RPC and the backend nobody budgets for.
Walk away from one call with a team shape, an audit plan, a rate range and a start date. No pitch deck, no obligation.
Tell us what you are deploying and on which chains. No sales pitch, just profiles that fit. Prefer email? Use our contact page.
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