Capabilities

Technical capabilities

A breakdown of technologies, frameworks, and domains I work with, referenced against the production systems, data pipelines, and research projects where they were used.

Remote · Spain/EU ⇄ US/MX/Americas availability Fortran → TypeScript ES native · EN C1 (IELTS 7.5)

Capability map Self-directed work Where this fits Contact

01 / Capability map

Core competencies & project references

Languages

PythonGo TypeScript / JavaScriptNode.js FortranSQL KotlinJavaObjective-C

PROJECTS — Fortran/OpenMP numerics, Go microservices, TypeScript SDK & widgets.

Backend & architecture

MicroservicesREST APIs gRPCDistributed systems Scalability & reliabilityETL pipeline design Rules enginesNestJSNext.js

REFERENCE — rules engine evaluating eligibility under peak event traffic.

Web frontend

ReactNext.js Tailwind CSSEmbeddable widgets

REFERENCE — embeddable wallet widget and public developer SDK.

Security & identity

Applied cryptographyECDSA signatures Verifiable credentialsX.509 Key managementJWTSSO Multi-tenant isolation

REFERENCE — on-device cryptographic signing, multi-tenant data isolation.

Data stores

PostgreSQLMongoDB RedisElasticsearch

CERTIFIED — C100DBA, MongoDB Certified DBA Associate.

Cloud & DevOps

AWSS3 · Lambda Step Functions · BatchDocker CI/CDGitHub Actions GitLinuxGCP (basic)

REFERENCE — serverless ETL pipelines on AWS, containerised models in production.

Infrastructure & networking

Proxmox (LXC)Terraform WireGuardHeadscale mesh VPN Cloudflare API · dynamic DNSLinux networking

CONTEXT — self-hosted and self-provisioned; see self-directed work below.

Web3 / blockchain

Multi-chain EVMviem / wagmi PrivyWalletConnect ERC-721 · ERC-20Token-gated access

REFERENCE — embedded multi-chain wallet released as open source.

Data & machine learning

Daskxarray pandasGeoPandas NumbaTensorFlow / Keras Jupyter

REFERENCE — out-of-core processing of ~2 TB ocean datasets, LSTM failure prediction in production.

GIS & geospatial

GDALQGIS netCDFCoastal & ocean data pipelines

REFERENCE — generating and post-processing an ensemble of ~20k scenarios.

Scientific computing & HPC

OpenMPSLURM CMake / MakeGCC & Intel compilers ROMS · Delft3D · SFINCSNumerical validation Sediment transportLagrangian ↔ Eulerian

REFERENCE — re-engineered particle core with OpenMP parallelisation.

AI / LLM tooling

Local LLM inferencellama.cpp Runtime parameter tuningAgent harnesses Claude · Cursor · Antigravity

CONTEXT — running models on constrained hardware, and wiring local and hosted APIs into a single agent harness.

02 / Self-directed work

Self-hosted infrastructure & tooling

A self-hosted platform

Proxmox for LXC provisioning, Terraform for declarative infrastructure as code, a self-hosted mesh VPN with WireGuard and Headscale, and dynamic DNS automated via the Cloudflare API. Maintaining this platform provides hands-on familiarity with Linux networking and the operational layers underneath production application services.

Local LLMs and agent harnesses

Running local inference with llama.cpp, evaluating quantization tradeoffs for resource-constrained deployment, and developing agent harnesses that integrate self-hosted models with cloud APIs for automated development workflows.

03 / Where this fits

Areas of focus

Backend and platform engineering

Production microservices, REST and gRPC APIs, and data pipelines — taking full responsibility from architecture through CI/CD and day-2 operations with clear interfaces and clean operational ownership.

Numerical and scientific systems

Simulation, modelling, and geospatial data platforms where mathematical accuracy is essential and software engineering standards ensure reproducible, verifiable results.

Complex, open-ended problem solving

Comfortable working with ambiguous requirements, investigating legacy codebases, and seeing systems through from initial architecture to daily operational maintenance.

Remote collaboration across time zones

Based in Santander, Spain, working hours that overlap European and American teams, with disciplined asynchronous written communication habits.

04 / Contact

Get in touch

Open to discussing backend engineering roles, scientific computing projects, and distributed systems challenges. Feel free to reach out via email or LinkedIn.

Start a conversation See the case studies

Emailantonimmo@gmail.com GitHubgithub.com/antonimmo LinkedInin/antonioquintana3

LanguagesSpanish (native) · English (C1, IELTS Academic 7.5) · French (basic)

CertificationC100DBA — MongoDB Certified DBA Associate