Felipe
Ramos da Silva.

Responsibilities

• —Lead strategic initiatives across payments, wallets and crypto-financial infrastructure, fostering a culture of quality, innovation and technical excellence.
• —Define architecture and lead implementation of critical systems supporting business scalability, with high availability, security and performance.
• —Design and evolve financial infrastructure powering digital wallets, payments and blockchain transactions — including backend services for transaction processing, ledger consistency and high-volume financial operations.
• —Partner directly with product, compliance and executive leadership to align technical decisions with strategic goals, regulatory requirements and business needs.
• —Mentor and coach engineers, drive engineering best practices, code reviews and continuous architectural evolution.
• —Active participation in hiring, performance reviews and team development — contributing to hiring decisions, promotions and structured team growth.
• —Help organise and scale the engineering team, structuring processes, defining technical priorities and distributing responsibilities.

Highlights

• —Led development of a global crypto-based financial platform enabling multi-currency operations and supporting international expansion.
• —Architected and implemented a card authorization and ledger system at 99.9% availability and <50ms latency.
• —Integrated and evolved payment infrastructure with non-custodial wallets and DeFi protocols including Aave, OpenDollar, BRLA, Uniswap and Circle CCTP.
• —Built a multi-user control system with on-chain permissioning, enabling secure operation of smart wallets across teams.
• —Designed payment processing systems with high transactional volume and elevated availability.
• —Led cross-team initiatives spanning engineering, product and compliance to ship critical features and meet regulatory requirements.

Responsibilities

• —Develop and evolve backend services and blockchain integrations responsible for financial operations and digital asset management on the platform.
• —Active participation in architecture and technical decisions ensuring scalability, security and performance.
• —Implement integrations with multiple EVM blockchains, ensuring interoperability across ecosystems.
• —Collaborate with product and engineering on planning and building new platform features.
• —Contribute to the evolution of distributed services responsible for transaction processing and blockchain operations.
• —Mentor and support other engineers, spreading good development practices and code quality.

Highlights

• —Built a Custodial Wallet Extension based on MetaMask supporting 8 EVM networks (Arbitrum, Avalanche, Base, BSC, DFK Chain, Ethereum, Polygon, Ronin).
• —Architected Node.js backend services managing wallet requests, transaction processing and operation control.
• —Built a rule engine for the custodial wallet, validating, blocking and authorising operations per platform-defined rules.
• —Implemented infrastructure for secure wallet generation, key storage and encryption.
• —Developed gas-fee sponsorship for blockchain transactions, improving end-user experience.
• —Implemented large-scale indexing and search pipelines with Typesense, Debezium and Kafka.
• —Built withdraw flows from custodial wallets with strong security and consistency guarantees.
• —Implemented EVM contract reads and interactions: gas estimation, transfers, ownership validation, asset metadata, collection approvals.
• —Built blockchain tests and simulations using Ganache for operation and contract validation.

Responsibilities

• —Develop and evolve systems for classification, categorisation and ranking of properties on the platform, focused on listing quality and user experience.
• —Implement validation rules, classification logic and scoring algorithms used to evaluate and prioritise rental listings.
• —Close collaboration with product, design and data teams on requirements, prioritisation and aligning technical decisions with business goals.
• —Active participation in code reviews, ensuring quality, consistency and adherence to engineering best practices.
• —Continuous refactoring and improvement of existing services and components for maintainability, performance and scalability.

Highlights

• —Improved listing quality on the platform, reducing the presence of low-quality listings.
• —Positively impacted the relevance and ranking of properties displayed to users.
• —Developed and improved scoring algorithms, increasing precision in property evaluation and prioritisation.
• —Contributed to a scalable architecture for processing and classifying large volumes of real-estate data.
• —Improved user experience through more consistent and reliable property information.

Responsibilities

• —Lead the technology organisation, managing engineers, tech leads, PO and QA responsible for evolving company products.
• —Define technology strategy and platform evolution, aligning technical decisions with business goals.
• —Engineering team management — organisation, technical priorities, performance and professional development.
• —Plan and manage the technology budget and resources, ensuring efficient infrastructure and tooling spend.
• —Architect and develop critical platform services, contributing actively to implementation and evolution.
• —Operate services in production, ensuring reliability, availability and continuous evolution of the platform.

Highlights

• —Architected and built a payments and subscriptions service handling the full payment lifecycle: order creation, payment validation, anti-fraud and product activation.
• —Implemented a Payment Hub unifying integrations with multiple payment gateways.
• —Built a Node.js + TypeScript microservices architecture with RabbitMQ for payment-request orchestration.
• —Built a multichannel communication service handling SMS, WhatsApp, email and push notifications, integrated with Firebase, Twilio SMS, SendGrid and Twilio Flex.
• —Migrated infrastructure from bare EC2 (no CI/CD or autoscaling) to a containerised AWS ECS Fargate architecture.
• —Introduced modern infrastructure practices including CI/CD with GitHub Actions, autoscaling, failover, logging and monitoring — significantly improving reliability and scalability.

Responsibilities

• —Lead a four-engineer squad responsible for mobile and web applications.
• —Define architecture and develop new platform services and features.
• —Technically coordinate React Native and React Web development, ensuring quality, scalability and consistency across platforms.
• —Collaborate with product and design on feature definition and UX prioritisation.
• —Mentor and coach squad engineers, spreading engineering best practices and continuous architectural evolution.
• —Plan and track feature delivery, aligning technical execution with business goals.

Highlights

• —Led the React Native mobile app, sharing most of the codebase between Android and iOS.
• —Built the web version using React Native Web, enabling significant code reuse across platforms.
• —Implemented core platform features: appointment scheduling, payments and wallet, dependants, benefits and subscription management.
• —Built a modular white-label architecture allowing partners to ship customised versions of the app.
• —Integrated with clinic management systems via AWS Lambda serverless services.
• —Built a service connecting medical scheduling with the company's HelpDesk, improving customer service speed and reliability.
• —Built a backoffice application as a control centre for managing platform services.

Responsibilities

• —Develop and evolve mobile and web applications for healthcare services, focused on patient experience and clinical operations.
• —Implement scheduling, telemedicine and health information management features in the mobile app.
• —Build backend services and integrations for scheduling processing, medical data management and inter-system communication.
• —Collaborate with product and design on the patient digital journey.
• —Contribute to architectural evolution, ensuring scalability, code quality and efficient service integration.

Highlights

• —Contributed to the iOS/Android mobile app in React Native connecting patients to medical services.
• —Implemented core platform features: appointment scheduling, WebRTC-based telemedicine, medical follow-up and payment management.
• —Built a telemedicine platform enabling remote video consultations between patients and clinicians.
• —Built a web application for clinic, doctor and patient management — schedules, availability, medical records.
• —Implemented customisable medical-record management with sessions, questionnaires and clinical data storage.
• —Integrated web and mobile for sync of appointments, validation and user notifications.
• —Built a notification system integrated with the mobile app for patient communication.

Responsibilities

• —Develop and evolve e-commerce platforms and internal systems for sales, operations and partner integrations.
• —Implement new features in web and backend applications, ensuring performance, scalability and code quality.
• —Build integrations with external systems including ERPs and payment gateways.
• —Improve application performance via query optimisation, resource analysis and caching.
• —Build applications across web and integrated desktop environments.

Highlights

• —Contributed to a Ruby on Rails + React marketplace processing millions of monthly requests for gaming hardware sales.
• —Built backoffice features for sales management, taxation and commercial operations.
• —Built integrations with ERPs and payment gateways automating financial and operational processes.
• —Optimised application performance via query analysis with MiniProfiler.
• —Built a Redis-based caching layer reducing response times and unnecessary data loads.
• —Participated in the redesign of critical marketplace features — cart, payments and product display — focused on conversion.
• —Built a .NET desktop application for physical store management integrated with the marketplace: financial control, inventory, orders, sales.
• —Contributed to a MeteorJS + Ruby on Rails ticketing platform for gaming rooms — ticket management, cart, orders and payment integrations.