Nextrope

Alior Bank needed a legally compliant "durable medium" solution - long-term proof that regulated documents were delivered and remain unchanged, independently verifiable years later.

Nextrope co-developed an on-chain proof layer on public Ethereum: integrity commitments are generated off-chain (no customer data on-chain), then anchored via smart contracts. Verification logic was integrated directly into the bank's enterprise workflows.

Scope: smart contract development, off-chain proof architecture, security hardening, production deployment, ongoing maintenance since 2019.

Result: a privacy-first, audit-ready verification layer replacing over 1 million paper letters annually - covered by Forbes: https://www.forbes.com/sites/hanktucker/2019/06/17/polish-bank-alior-uses-public-ethereum-blockchain-for-new-document-authentication-feature/

Stack: Solidity, Node.js, PostgreSQL, Nginx

Soil expanded into the XRPL ecosystem to deliver stablecoin-denominated yield flows natively - without bridges or EVM smart contract patterns. XRPL requires a fundamentally different system design while still meeting production expectations around performance, reliability, and operational clarity.

Nextrope supported the full delivery: XRPL-native transaction flow architecture, event-driven backend and APIs, custom indexing and data pipelines for traceability under real load, and production hardening with monitoring, incident playbooks, and runbooks.

Scope: XRPL protocol engineering, backend services, custom indexing, production operations, ongoing iteration with client team.

Result: A production-ready XRPL foundation for stablecoin yield and settlement workflows - designed for throughput, traceability, and ongoing iteration. Featured in industry press: Soil Introduces Single Asset Vault on XRPL to Streamline Institutional Lending.
Featured in Business Insider: https://markets.businessinsider.com/news/currencies/soil-introduces-single-asset-vault-on-xrpl-to-streamline-institutional-lending-1035804483

Stack: XRPL, Node.js, React

WeAr, a premium fashion media brand collaborating with Tommy Hilfiger, explored a token-based product concept where early community dynamics and distribution mechanics were key to adoption.

Nextrope supported the team with practical token design and launch readiness: incentive and allocation logic, rollout sequencing, execution checklist, community messaging structure, and technical consultation to keep the plan implementable.

Scope: Token mechanics design, distribution logic, launch planning, community rollout materials, technical consultation.

Result: A clear token mechanics framework and launch execution plan — aligned between incentives, distribution, and community activation — that the team could use as a direct foundation for rollout.

"Nextrope was our trusted technology partner in bringing WeAr's metaverse and NFT concept to life." — Shamin Vogel, Co-Publisher & Editorial Director, WeAr

Stack: Solidity, React, Node.js, PostgreSQL, Nginx

Soil needed a DeFi lending product that reduces reliance on fragile crypto-only collateral by linking lending to real-world business performance — connecting crypto lenders with corporate borrowers backed by Real World Assets.

Nextrope delivered the full protocol stack: smart contracts for the lending marketplace on Arbitrum and Polygon, backend services supporting operational workflows, and indexing foundations for protocol activity reporting.

Scope: EVM smart contract development (Solidity), backend services, data indexing, operational readiness across Arbitrum and Polygon.

Result: A production-grade DeFi lending marketplace connecting crypto lenders to real-world companies — widening access to yield beyond institutions and reducing exposure to pure crypto market volatility.

Stack: Solidity, Node.js, PostgreSQL, Arbitrum, Polygon

Kinguin needed to ship an NFT marketplace on Immutable X (L2) and required senior Web3 developers who could onboard fast and maintain delivery speed without sacrificing quality.

Nextrope provided staff augmentation: two highly qualified Web3 developers (Solidity + React) integrated directly into Kinguin's team to support marketplace build delivery on the ImmutableX L2 stack.

Scope: Staff augmentation, Solidity smart contract development, React frontend, Immutable X integration, marketplace delivery support.

Result: Kinguin shipped a live NFT marketplace on Immutable X featuring over 50 collections and more than 200,000 unique NFTs - with search, wallet connection (MetaMask), and full user-facing marketplace experience.

"With Nextrope's help, Kinguin was able to quickly and effectively find two highly qualified developers with expertise in the web3 blockchain industry and Solidity." - Marek Fila, CTO, Kinguin

Stack: Solidity, React, Immutable X