Hire Freelance
Fintech Rust Developers in Spain
Built through years working with teams and engineers in the Rust ecosystem.
We specialize in systems programming, database internals, and performance-critical infrastructure.
Focused, relevant introductions from a curated network.
Available Developers
Head of Quant Engineering
Developed quantitative trading systems using Rust and C++, focusing on high-frequency trading algorithms. Implemented smart contracts for decentralized finance applications.
- Built high-frequency trading algorithms
- Developed DeFi smart contracts
- Specialized in quantitative finance systems
Independent Systems Research & Consulting
Designed and implemented distributed systems for high-availability services using Rust and Python. Led teams in developing blockchain-based applications with a focus on smart contract security.
- Optimized SQL databases for performance and scalability
- Authored technical documentation for complex system architectures
- Contributed to open-source distributed ledger projects
Senior Rust Fintech Engineer
- Led migration of monolithic system to microservices architecture
- Built high-throughput data pipeline processing 1M+ events per second
- Designed and implemented real-time monitoring and alerting platform
CTO / Technical Lead
Led the development of a cross-platform graphics engine using C++ and Rust. Pioneered low-level performance enhancements in embedded systems with assembly code.
- Designed real-time rendering pipelines
- Optimized compilers for embedded applications
- Implemented custom memory management techniques
Staff Backend Engineer
Architected backend systems using Rust and Node.js, focusing on scalable cloud infrastructure with AWS. Developed containerized applications using Docker Swarm, ensuring robust CI/CD integration.
- Implemented event-driven architectures with AWS Lambda
- Optimized network communication protocols for high availability
- Built distributed logging systems for microservices
Software Engineer
Built and scaled cloud-native applications leveraging Kubernetes and Rust. Developed real-time data processing pipelines for large-scale analytics.
- Implemented machine learning models in Python
- Architected microservices in Scala
- Managed distributed systems with Java
Team Lead - Backend
Designed backend systems using Rust and Go for high-performance applications. Managed data persistence with PostgreSQL and caching strategies using Redis.
- Integrated NestJS for modular server-side applications
- Developed API gateways for microservice communication
- Optimized Node.js applications for concurrency
Full-stack Rust Engineer
Designed and implemented a full-stack application using Rust and Node.js, focusing on seamless API integrations. Optimized database interactions with PostgreSQL.
- Utilized Java for backend service enhancements
- Configured SQL queries for complex data retrieval
- Deployed ArangoDB for graph-based data storage
Senior Backend / Systems Engineer
Engineered a distributed ledger technology platform using Rust for secure transactions. Developed low-latency network protocols in C for high-frequency trading platforms.
- Optimized Python scripts for data analytics
- Built a custom memory management system in C++
- Implemented concurrency models for scalable applications
Senior Software Engineer
Engineered distributed systems in Go and Rust for payment processing, Web3 infrastructure, smart contracts, and cross-chain services, including ecosystems exceeding 200 microservices. Maintained tier-one transaction workloads on Kubernetes with operational practices centered on failure behavior, deployment safety, and observability.
- Open-source Go multi-agent orchestrator
- Cross-chain backend integration
- Prometheus and Grafana platform monitoring
- Docker-based production deployments
IT Specialist
Develops Linux desktop applications with Tauri 2 by pairing Rust application engines with typed JavaScript bindings, installers, and automated tests. Maintains open-source plugins and contributed fixes across Tauri core, Tao, and Microsoft’s tgrep tooling, backed by extensive Linux administration and network-infrastructure experience.
- Built cross-platform desktop installers
- Maintains Rust-to-TypeScript plugin interfaces
- Administered DNS, DHCP, VPN, and virtualization systems
- Operated Redis, SQLite, Nginx, and NAS infrastructure
Senior Lead Engineer
Leads hardware and firmware platforms spanning holographic AR/VR, neural implants, industrial devices, and high-end x64 systems. Technical work includes graphene-based implant electronics, ASIC-facing development, clean-room fabrication, ACF/COF assembly, DDR4 platforms, and design-for-manufacture in medical applications.
- High-speed electronics architecture
- Power electronics and circuit design
- Design-for-test implementation
- FMEA-driven product risk analysis
Digital Twin Engineer
Develops an end-to-end satellite digital twin and operations simulator, owning requirements, implementation, and repository-level technical governance. Applies model-based systems engineering to deterministic embedded and flight-software behavior under aerospace verification constraints.
- AOCS operations-model integration
- Software Requirements Specification authorship
- C and C++ embedded simulation components
- Rust-based systems tooling
Lead Software Engineer
Led the development of distributed systems using Rust and Go for scalable cloud services. Designed high-throughput data processing solutions in C++.
- Architected Java microservices for enterprise applications
- Implemented Kotlin-based solutions for backend services
- Enhanced system reliability with fault-tolerant design
Infrastructure Developer
Built CI/CD pipelines to support agile development and rapid deployment. Enhanced enterprise cloud infrastructure with automated provisioning scripts.
- Integrated Swift for cross-platform mobile solutions
- Configured scalable backend services in C#
- Implemented real-time data processing with Java