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Backend Golang Developers in Spain

Built high-reliability payment platforms and more than 200 microservice components using Go and Rust, alongside Web3 infrastructure, smart contracts, and cross-chain services. Maintains an open-source Go multi-agent workflow orchestrator and operates tier-one transaction-processing systems with failure-oriented deployment and observability models.

• Kubernetes platform engineering
• Prometheus and Grafana operational telemetry
• Docker-based deployment automation
• Cross-chain backend integration

Architected a distributed enterprise data-exchange platform serving more than 600 applications across seven countries and approximately 70,000 daily transfers. Operated multi-petabyte streaming infrastructure across four production regions on OpenStack and AWS, and built an LLM-driven workflow execution product.

• Designed hybrid-cloud data movement across regions
• Built distributed API monitoring capabilities
• Integrated natural-language flow creation and debugging
• Developed GenAI-driven live workflow modification

Led the development of a real-time IoT data processing platform using Golang and Node.js, achieving high availability and fault tolerance. Spearheaded the creation of a scalable cloud-based infrastructure for a SaaS application.

• Implemented serverless architecture with AWS Lambda
• Developed custom plugins for data visualization tools
• Built a CI/CD pipeline for automated deployments

Designed high-availability Go and Ruby on Rails microservices for retail and customer-loyalty platforms on GKE, Cloud Run, and other Google Cloud services. Combines REST, gRPC, Protobuf, PostgreSQL, MongoDB, Couchbase, and Dataflow-based data processing with LLM and conversational-agent integrations.

• Built Cloud Dataflow automation pipelines
• Deployed services through GKE orchestration
• Integrated Watson Assistant and Dialogflow
• Implemented Pandas-based data workflows

Designed and implemented microservices architecture for a high-traffic e-commerce platform, optimizing service communication with REST APIs. Developed CI/CD pipelines using TeamCity to streamline deployment processes, reducing release time by 40%.

• Automated infrastructure provisioning with Bash scripts
• Integrated third-party payment gateways via RESTful services
• Implemented logging and monitoring solutions for microservices
• Optimized database queries to improve API response times

Shipped Go services for an AI-enabled social platform processing approximately 9.6 million translation messages monthly, plus rule-based user-generated-content moderation. Previously delivered enterprise RBAC and payment systems handling more than 2 million daily transactions and over 10,000 checks per second.

• Monorepo-wide dead-letter queue layer
• ScyllaDB and Cassandra data stores
• Redpanda and Kafka event pipelines
• Multi-model routing through OpenRouter

Architected high-throughput Go services and Kubernetes platforms across GCP, Azure, and AWS, using asynchronous messaging and automated quality gates. Built a conversational messaging platform supporting webhook automation, real-time WhatsApp interactions, in-chat purchases, and digital payments.

• Cross-cloud Kubernetes operations
• CI/CD pipeline standardization
• Enterprise webhook processing
• Real-time payment messaging

Architected Kafka pipelines spanning dozens of synchronized topics and thousands of events per second. Resolved cross-topic consistency through dead-letter retries and deduplication, then redesigned a production query path to reduce read latency tenfold.

• Established contract-first OpenAPI and Swagger practices
• Implemented Go concurrency and goroutine lifecycle patterns
• Defined Kafka delivery semantics and retry policies
• Led production incident reviews and reliability changes

Engineered scalable backend services using Golang and Java for enterprise applications. Developed cloud-based solutions with Python for automation. Integrated multi-language support with C# and TypeScript.

• Scalable backend services
• Cloud-based automation solutions
• Multi-language support integration

Designed encrypted real-time communication protocols connecting decentralized applications with wallets, alongside backend services for a cryptocurrency wallet serving 30 million users. Built Go data pipelines and event-driven microservices using SQS, DynamoDB, PostgreSQL, Redis, WebSockets, and observability instrumentation.

• EVM protocol user indexing
• DeFi liquidity interface development
• ERC-1155 game-economy protocol
• Elixir multiplayer real-time services

Develops Go services for an auditable corporate AI-agent platform using hexagonal architecture, Python components, Kubernetes, Argo, and GitHub Actions. Previously built Kotlin/Spring Boot and Go/Java microservices for media and ecommerce platforms, integrating Kafka and cloud-hosted third-party systems.

• Implemented payment and booking provider integrations
• Built webhook-driven backend functionality with Cognito
• Tested Go services using gomock, Ginkgo, and Gomonkey
• Created component tests with Mountebank

Designed scalable backend architectures using Erlang and Golang, focusing on concurrency and fault-tolerant systems. Led the development of data-intensive applications with SQL and Python.

• Implemented complex data transformations with Bash scripting
• Architected messaging systems for real-time communication
• Optimized PHP applications for cloud deployments

Designed AWS serverless data pipelines with Step Functions and S3 to reduce service coupling and improve fault tolerance. Built Go services using concurrency and performance patterns across cloud products supporting education, healthcare, and AI-assisted workflows.

• Implemented workflows with Lambda, SQS, and ECS
• Built search capabilities with Elasticsearch and OpenSearch
• Developed AI tools using LangChain and LangSmith
• Provisioned infrastructure through Terraform and Kubernetes

Built government-scale geospatial systems supporting more than 800,000 agricultural beneficiaries and €7.1 billion in annual subsidy monitoring. Developed GCP ETL pipelines for land-use datasets and satellite imagery, a PostGIS cartographic monitoring platform, and a public catalogue API exposing more than 300,000 authority records.

• Google Earth Engine extraction
• BigQuery analytical datasets
• CKAN open-data API
• Containerized GCP services