Bandwidth Ninth was founded by a team of engineers whose careers began in Silicon Valley at companies such as PayPal and Twitter, before joining Brazil’s largest financial institution Itaú to work on large-scale financial platforms. Over time the team expanded internationally, building a distributed engineering group across the US, Europe and Brazil focused on solving complex data challenges in financial services, including fund administration systems, blockchain infrastructure and stablecoin projects.
Our Services
We design and deliver next‑generation financial systems for institutions operating at scale. Our team has deep experience in high‑performance fund administration platforms, transaction processing infrastructure, and data‑intensive back‑office systems, combining Silicon Valley engineering rigor with real‑world finance expertise.
Our work supports institutions tackling core operational challenges similar to those addressed by firms such as JPMorgan Chase, BlackRock, BNY Mellon and leading capital markets platforms. Whether integrating with global treasury systems, streamlining fund accounting, or architecting enterprise‑grade data platforms, we build software that can withstand the complexity and regulatory demands of modern finance.
Designing and implementing blockchain systems that power institutional digital assets and stablecoin ecosystems. We help financial institutions and technology organisations innovate with blockchain — from core infrastructure and secure smart contract frameworks to digital asset APIs and tokenisation platforms. Our services span enterprise blockchain solutions, permissioned ledger integrations, and stablecoin ecosystem components. This work aligns with projects transforming the financial stack, such as the Canton Network consortium backed by Goldman Sachs, BNP Paribas and Deutsche Börse, and stablecoin initiatives like Circle’s USDC and institutional digital cash systems like JPM Coin — where secure, compliant blockchain layers are critical to success. We focus on performance, auditability, security and regulatory compliance — bringing institutional‑grade engineering to the forefront of digital asset innovation.
Solving the hardest data problems — from real‑time processing to predictive analytics and infrastructure architecture. Data is at the heart of every critical financial operation. We design scalable architectures that enable efficient ingestion, transformation and analysis of voluminous real‑time financial data, feed reconciliation systems, risk‑management pipelines, and analytic platforms. Our engineering approach supports clients in domains including capital markets, wealth management, risk analytics and enterprise system integrations. Whether building data warehouses and streaming frameworks, rationalising legacy back‑end systems, or establishing secure cross‑institution data APIs, we bring architectural leadership that helps our clients manage data complexity at global scale — akin to the infrastructure challenges faced by global banks and market utilities.
JPMorgan Chase
Treasury Data Infrastructure
Sector: Global Banking / Treasury Systems
Bandwidth Ninth engineers contributed to the modernisation of internal treasury data infrastructure supporting global liquidity management and transaction reporting.
The engagement focused on improving the ingestion, reconciliation and normalisation of financial data streams originating from trading venues, payment networks and internal accounting systems. Working alongside internal engineering teams, we designed distributed processing pipelines capable of handling large volumes of real-time financial transactions while maintaining strict audit and reconciliation requirements.
The platform introduced event-driven processing and improved data lineage capabilities, enabling treasury teams to access more reliable real-time liquidity insights.
Itaú Unibanco
Core Banking Data Engineering
Sector: Banking / Financial Platforms
Bandwidth Ninth originated from engineers who previously worked on large-scale banking systems at Itaú, one of the largest financial institutions in Latin America.
During this period the team worked on core banking infrastructure responsible for processing millions of daily financial transactions, focusing on backend data architecture, distributed systems and payment processing reliability.
These projects required strict operational resilience and regulatory compliance given the scale of the bank’s retail and institutional operations.
Circle Internet Financial
Stablecoin Infrastructure Engineering
Product: USD Coin
Sector: Digital Payments / Blockchain
Bandwidth Ninth engineers worked on infrastructure supporting the broader ecosystem around USDC stablecoin settlement and integration.
The work focused on building APIs and service layers enabling financial platforms to integrate stablecoin payment flows, monitor token movements and reconcile blockchain transactions with off-chain systems.
Security, observability and transactional auditability were critical requirements given the institutional financial context.
Canton Network Ecosystem
Institutional Blockchain Integration
Client Ecosystem: Canton Network
Participants include: Goldman Sachs, BNP Paribas, Deutsche Börse
Bandwidth Ninth engineers contributed to projects exploring interoperability and infrastructure development around the Canton Network ecosystem.
The work focused on integrating distributed ledger infrastructure with traditional financial systems, ensuring institutional requirements such as privacy, regulatory compliance and transaction auditability could be maintained.
Our team contributed engineering expertise in distributed systems, financial data modelling and enterprise integration.
Fireblocks
Institutional Digital Asset Custody Infrastructure
Sector: Digital Asset Custody / Infrastructure
Bandwidth Ninth engineers contributed to infrastructure used by institutional clients managing digital asset custody and transaction settlement.
The project focused on building high-reliability backend services responsible for transaction orchestration between internal custody systems and external blockchain networks. These services were designed to coordinate complex workflows including transaction approvals, policy enforcement and multi-party cryptographic signing processes.
Particular attention was paid to operational security and deterministic audit trails, ensuring that every digital asset movement could be fully traced across both internal custody infrastructure and public blockchain networks.
Anchorage Digital
Secure Blockchain Validator Infrastructure
Sector: Institutional Crypto Infrastructure
Bandwidth Ninth engineers supported the development of infrastructure used to operate secure blockchain validator nodes for institutional staking and network participation.
The project focused on building orchestration and monitoring systems responsible for maintaining highly available validator infrastructure across multiple blockchain networks.
Engineers implemented tooling for automated node management, failover handling and operational monitoring to ensure validator reliability while maintaining strict operational security controls.
Chainalysis
Blockchain Data Processing Systems
Sector: Blockchain Analytics / Financial Intelligence
Bandwidth Ninth engineers worked on systems responsible for ingesting and analysing large volumes of blockchain transaction data across multiple networks.
The platform required scalable processing pipelines capable of parsing blockchain ledgers, reconstructing transaction graphs and enriching address data with analytical metadata used by financial institutions and regulators.
Our work focused on building distributed processing systems capable of handling rapidly growing blockchain datasets while maintaining accurate historical indexing.
Depository Trust & Clearing Corporation
Distributed Ledger Settlement Research
Sector: Market Infrastructure / Post-Trade Systems
Bandwidth Ninth engineers contributed to research and engineering efforts exploring distributed ledger technology for post-trade settlement infrastructure.
The engagement focused on evaluating how distributed ledgers could support complex settlement workflows while maintaining the privacy, scalability and regulatory controls required by global market infrastructure.
Our team developed prototype architectures modelling tokenised asset transfers and multi-party settlement processes across institutional participants.
About
Bandwidth Ninth
Bandwidth Ninth is a specialist engineering team focused on building software for the most complex problems in finance, data infrastructure and networked systems.
Our engineers work at the intersection of financial systems, distributed infrastructure and large-scale data platforms - designing and delivering the kind of software that underpins global markets, payment networks and institutional digital asset platforms.
The company originated from a group of engineers who began their careers in Silicon Valley, working on large-scale distributed systems at companies such as PayPal and Twitter before moving into financial infrastructure engineering.
Several members of the team later worked on core banking and financial data platforms at Itaú Unibanco in Brazil, where they built systems responsible for processing millions of daily transactions across one of Latin America's largest banking institutions.
Today, Bandwidth Ninth operates as a globally distributed engineering team working with financial institutions, fintech companies and infrastructure providers across North America, Europe and Latin America.
What We Do
We build systems for organisations operating at scale in finance and financial technology.
Our work focuses on three categories of problems:
Financial systems engineering
We design and implement resilient backend systems for financial institutions and capital markets infrastructure.
This includes fund administration platforms, treasury data infrastructure, transaction processing engines and operational systems supporting large-scale financial operations.
Our engineers have contributed to projects involving institutions such as JPMorgan, BlackRock and BNY Mellon, working on the data pipelines and processing systems that support global investment operations.
These systems require extreme reliability, deterministic processing and strict auditability — qualities that define how we engineer software.
Blockchain and digital asset infrastructure
Bandwidth Ninth engineers have worked on infrastructure supporting institutional digital asset ecosystems and blockchain-based financial networks.
This includes engineering contributions to stablecoin infrastructure, blockchain data platforms and secure custody systems used by financial institutions integrating digital assets into their operations.
Projects have included infrastructure related to USDC stablecoin integrations, blockchain analytics platforms used by financial institutions, and distributed ledger research connected to next-generation market infrastructure initiatives such as the Canton Network ecosystem.
Our focus is on bringing institutional-grade engineering practices — security, observability, compliance and operational resilience — into blockchain infrastructure.
Complex data platforms
Financial systems generate enormous volumes of data that must be processed, reconciled and analysed in real time.
We design scalable architectures capable of ingesting, transforming and analysing large-scale financial datasets.
This includes:
• real-time market data pipelines
• transaction reconciliation systems
• treasury data platforms
• blockchain ledger indexing systems
• financial analytics infrastructure
Our engineering approach emphasises deterministic data processing, strong data lineage and architectures capable of operating reliably under high transactional load.
How We Work
Bandwidth Ninth operates as a senior engineering team that integrates directly with client organisations.
We typically work in two ways:
Embedded engineering teams
Our engineers integrate directly into internal teams, working alongside client engineers and technical leadership to design and deliver critical infrastructure.
This model is often used when organisations need specialised expertise in distributed systems, financial infrastructure or blockchain engineering.
End-to-end system delivery
For certain projects we design and build complete systems — from architecture through implementation and deployment.
These projects typically involve complex backend infrastructure such as financial processing platforms, blockchain integration layers or large-scale data systems.
In both cases, our focus is the same: building reliable systems capable of operating in demanding institutional environments.
Engineering Philosophy
We focus on problems where software must operate under extreme technical and operational constraints.
Financial infrastructure is unforgiving — systems must be correct, observable and resilient at all times.
Our engineering philosophy emphasises:
• simple, reliable system design
• deterministic processing of financial data
• strong operational observability
• security and auditability by design
• performance under high transactional load
Many of the problems we work on involve networked systems — platforms that coordinate transactions, data or assets across multiple institutions.
These systems sit at the core of modern financial infrastructure.
Lucas Cavalho : CEO
Sara Ruxmini : Head of ops
Contact Us
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