Batch saving optimization
Optimized batch data saving on a microservices platform by parallelizing tasks and tuning transactions, reducing response time and raising overall throughput.
−200 ms
Response time
+30%
Throughput
Technical Lead · Software Architect
Juan Miguel GarciaI take software from idea to production, end to end.
Technical lead and software architect with 15+ years. I own the whole delivery: functional analysis, architecture, DevOps, metrics and team management, with AI-assisted development under architectural oversight. Available for B2B projects.
About
who I amI'm a Technical Lead and Software Architect with 15+ years building web products, from APIs and platforms to blockchain and Web3. I own delivery end to end: functional analysis, solution design, DevOps, metrics and team management.
Today I lead architecture at ARKANIA Industrial A.I. and head technology at Altarius ETI as an independent consultant. I translate business requirements into software with Clean Architecture, DDD and Hexagonal Architecture, and I oversee AI-assisted development: guiding implementation, reviewing deliverables and keeping the work aligned with the architecture.
I'm passionate about software and technology, an AI enthusiast, and always looking for challenging projects where I can keep growing. I'm available for B2B projects and consulting.
- Location
- Madrid, Spain (remote)
- Experience
- 15+ years
- Focus
- End-to-end technical delivery
- Availability
- B2B projects & consulting
- Languages
- Spanish, English
Experience
git logHead of Strategic Technology · Altarius ETI · Independent consultant
Principal engineer and head of technology at a new company. I lead engineering, design and analyze the company's processes, manage the team, and build an internal SaaS to optimize those processes.
Engineering leadershipProcess designTeam managementInternal SaaS
Lead Software Architect · ARKANIA Industrial A.I.
Technical direction and architecture of applications across diverse stacks, including blockchain and Web3. I turn business requirements into solutions, design architectures with Clean Architecture and design patterns, define the integrations between systems, and oversee AI-assisted development: guiding implementation, tracking progress and reviewing deliverables against architectural standards.
Clean ArchitectureDDDBlockchainWeb3AI-assisted development
Senior Backend Engineer · Sportian
Troubleshooting, architecture optimization, technical-debt resolution and third-party integrations on a microservices platform. Raised unit and integration test coverage by up to 70% across 10 microservices, cutting production incidents by 50%.
DDDMicroservicesSymfonyPHPUnitRedis
Software Architect & Full-Stack Engineer · Dseta Studios · Independent
Independent lead engineer for client applications, from blockchain and Web3 to full web platforms. Software and infrastructure architecture from front end to back end, Stripe and blockchain payment gateways, DevOps, DDD and Hexagonal Architecture.
SymfonyLaravelReactNext.jsSolidityDocker
Senior Software Engineer & Head of Development · Nae
Led the development team and advised clients on choosing the right technical tools for each project. Designed Symfony-based architectures and REST APIs, handled application deployment, and built systems for clients such as Orange, MásMovil and Telefónica. Data mining with Celonis (certified).
SymfonyREST APINode.jsCelonis
Earlier experience 6
Backend Software Engineer · Next Chance Group
Technical-debt resolution and microservices architecture. Optimized 3 microservices with profiling, distributed caching and configuration tuning, cutting average latency by 60% (from 500 ms to under 200 ms).
SymfonyRabbitMQRedisDocker
Full-Stack Software Engineer · Canal Web S.L.
Architecture for a monolith-to-microservices migration and REST API design. Redesigned the commission calculation algorithm, cutting batch processing from 15 to 2 minutes.
PHPSymfonyRabbitMQPostgreSQL
Freelance Software Engineer · Freelance
Front-end and back-end web systems and database design for different clients. 3rd place at the Forgeathon by BemyApp (2015).
PHPJavaScriptNode.jsAndroid
Founder, CEO & VFX Supervisor · Dseta VFX
Founded a visual effects studio and designed its production pipeline for TV commercials, online advertising and film. Wrote Python and MEL tools for Maya, supervised compositing in Nuke and CG fluid simulation in Realflow, for brands such as Nestlé, Black Label, Nissan, Chobani and Nivea.
PythonMayaNukeRealflow
Lead Programmer & Web Developer · Orange Dot
Led the company's development team, front end and back end. Built a logistics and delivery system with online payments, order management and package tracking. Started in 2008 as a junior web developer at Inspiration net.
PHPJavaScriptMySQL
BSc in Computer Science, Computer Graphics · Universidad de Carabobo
Thesis on real-time shallow-water wave simulation. Also a Diploma in 3D Animation at AP Animation (2009).
Computer graphicsC++OpenGL
Technologies
stack.configArchitecture & Design
Clean ArchitectureHexagonalDDDTDDREST API designMicroservices
Backend
PHP 8SymfonyLaravelNode.js
Frontend
TypeScriptJavaScriptReactNext.js
Blockchain & Payments
SolidityWeb3StripeCrypto payment gateways
Data & Infrastructure
MySQLPostgreSQLRedisRabbitMQElasticsearchDockerKubernetesNginxDevOps
Delivery & Management
Functional analysisProcess designMetricsTeam managementAgile / ScrumCode reviewAI-assisted development oversight
Projects
selected workOAuth2-secured internal API
Designed and built a RESTful API secured with OAuth2 to integrate two microservices, speeding up authentication and making access governance simpler.
−40%
Authentication time
0
Security incidents (1st year)
Travel-preference app · Forgeathon
Prize-winning app where users swipe through images so the system builds preference and mood vectors, then matches them against a database of destinations. Built with Android, Node.js, Elasticsearch and REST on open content and open travel data.
3rd
Place at the Forgeathon
Real-time water wave simulation
Thesis project: software to model, visualize and animate shallow-water waves with a realistic look at low computational cost, in C++ and OpenGL, solving two-dimensional equations with a sparse linear-system library.
Results
measurable impact15+
Years of experience
−60%
Average latency across 3 services
−70%
Batch processing time (15 → 2 min)
−50%
Production incidents across 10 services
Contact
let's talkHave a product that needs a technical lead, or a project you'd like to take from idea to production? Write to me and I'll reply within 48h.
- Emailhello@onemi.me
- LinkedIn/in/jmgarcia2
- GitHub/onemidev