Crypto Trading & Crypto-Backed Loans App for Australians

Fintech · Crypto & Lending (B2C)

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Block Earner app: portfolio home screen and BTC-backed AUD loan with loan ratio

Year

2022

Client

Charlie

Timeframe

3 years

Block Earner is an Australian fintech, founded by Charlie Karaboga in Sydney, that gives everyday Australians one app to buy and sell crypto, move AUD in and out, and borrow against their crypto without selling it. The company is registered with AUSTRAC, offers its loans under an Australian Credit Licence, and is backed by investors including Coinbase Ventures. CipherCross has worked with Block Earner since 2022 as a long-term development and support partner.

The challenge

Block Earner set out to bring crypto trading, cash management, and crypto-backed lending together in one regulated, consumer-friendly app. That means real-time balances and prices, loan positions that react to market moves, and every deposit, withdrawal, and transfer handled with the care users expect from a financial product. As the business grew, it needed an engineering partner that could keep shipping new features and meet regulatory and security requirements without disrupting existing customers.

Two phones showing Block Earner crypto buy/sell and portfolio screens

Work process

Onboarding & Product Audit

We started by getting to know the product, the codebase, and the team's priorities. We reviewed the existing mobile and web flows, release process, and integrations, and agreed a roadmap that balanced new features with stability for customers already holding funds in the app.

Trading & Cash Management

We worked on the core money flows: buying and selling hundreds of cryptocurrencies with AUD, sending and receiving crypto, AUD deposits by bank transfer and PayID, instant sell-and-withdraw to AUD, and paying anyone directly from the app. Every flow was built to show clear confirmations and balances before money moves.

Crypto-Backed Loans

As Block Earner expanded into lending, we helped bring loans into the app: Bitcoin-backed fixed-term loans and lines of credit, loan dashboards with loan-to-value health indicators, available-to-borrow amounts, and easy repayments. Later releases added a redesigned fixed-term loan dashboard, new settings screens, and an address book that handles multiple tokens.

Security, Compliance & Quality

Fintech releases have no room for surprises. We tested money flows end to end across iOS, Android, and web, kept the app aligned with AUSTRAC and lending requirements, and treated authentication, saved bank accounts, and transfer limits with extra care in every release.

Three Years of Ongoing Support

Our collaboration continued well beyond launch. For three years we supported the product with regular releases, platform updates, bug fixes, and performance improvements, while helping the team ship new products as Block Earner's offering grew.