Alejandro Alvarez-AI Researcher & Engineer
Check rate
Experience
AI Researcher & Engineer
Tufa Labs
- Deployed and optimized the inference stack on a multi-node DGX B200 cluster across vLLM and SGLang (serving, throughput and latency tuning).
- Built, with a small team, an internal Python library for LM pretraining covering the full training loop: distributed training with PyTorch FSDP, data pipelines, checkpointing, config and hyperparameter management, and experiment tracking.
- Built and evaluated agent scaffolds on interactive game benchmarks similar to ARC-AGI-3, with metrics for how models plan, explore and adapt across multi-step episodes; classified model errors and fed the findings back into scaffold and evaluation design.
- Researched looped transformer architectures.
Freelance Software Engineer
Remote
- METR: evaluated the performance of LM agents on diverse software tasks.
- InvestSuite (fintech for banks): owned a Python reconciliation service end to end, ingesting transactions and orders from multiple broker APIs, normalizing them into a common schema and surfacing discrepancies. Built with FastAPI, MongoDB and PostgreSQL.
- Ciudadela: feature development for an early-stage community management platform, working directly with the founding team to scope and ship. Next.js and React front end over a GraphQL API.
Software Engineer
Dfinity
- Network Nervous System team: led the Rust implementation of production governance features (voting mechanisms, account naming) from design through rollout on a live distributed system with real users. Co-authored the blueprint for distributed applications on the network.
Software Engineer
- Privacy infrastructure team: built annotation and identifier systems tracking privacy attributes across a large codebase and data estate, making otherwise-invisible metadata discoverable and queryable, in Python, Java and TypeScript with pipelines across many internal data sources. Designed and built an internal web UI (TypeScript) for exploring privacy metadata.
Research Assistant
Computational Neuroscience Group
- Analyzed experimental recordings from primate decision-making tasks and built spiking neural network models of the recorded activity (Python, Matlab).
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Banking and Finance, and Education.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Research and Development, Finance, and Product Development.
Skills
Ml & Infra
Model Serving With Vllm And Sglang
Custom Cuda And Triton Kernels
Distributed Training With Pytorch Fsdp
Training And Evaluation In Pytorch And Jax
Slurm And Containerized Gpu Environments
Llm & Agents
Agent Scaffolds And Evaluation Harnesses
Benchmark And Rubric Design
Llm Application Development
Backend
Python Services And Rest Apis
Fastapi
Pytest
Typescript
React And Next.Js
Graphql
Postgresql
Mongodb
Redis
Sql
Numpy And Pandas
Docker
Git
Ci/Cd
Linux
Programming
Python
Rust
C++
Go
Typescript
Java
Languages
Education
Autonomous University of Madrid
MSc · Condensed Matter and Biological Systems · Madrid, Spain
Autonomous University of Madrid
BSc · Physics · Madrid, Spain
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Alejandro is based in Zürich, Switzerland.
Alejandro speaks the following languages: Spanish (Native), English (Advanced), French (Elementary).
Alejandro has at least 8 years of experience. During this time, Alejandro has worked in at least 4 different roles and for 5 different companies. The average length of individual experience is 2 years and 8 months. Note that Alejandro may not have shared all experience and actually has more experience.
Based on recent experience, Alejandro would be well-suited for roles such as: AI Researcher & Engineer, Freelance Software Engineer, Software Engineer.
Alejandro's most recent position is AI Researcher & Engineer at Tufa Labs.
In recent years, Alejandro has worked for Tufa Labs, Remote, and Dfinity.
Alejandro is most experienced in industries like Information Technology, Banking and Finance, and Education.
Alejandro is most experienced in business areas like Information Technology, Research and Development, and Finance. Alejandro also has some experience in Product Development.
Alejandro has recently worked in industries like Information Technology and Banking and Finance.
Alejandro has recently worked in business areas like Information Technology, Research and Development, and Finance.
Alejandro holds a Master in Condensed Matter and Biological Systems from Autonomous University of Madrid and a Bachelor in Physics from Autonomous University of Madrid.
The availability of Alejandro needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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