Carlos Henrique Tarjano Santos, PhD

• tarjano@live.com
• github.com/tesserato
• linkedin.com/in/carlostarjano
• orcid.org/0000-0003-3134-2778

LLMs, Multi-Agent Systems, MLOps, NLP, DSP, Software Development

Machine Learning Engineer | Researcher (PhD) building production-grade AI systems, ranging from bespoke neural architectures in low-level languages to multi-agent LLM workflows (local and API-based). My work spans real-time neural audio systems, automated feature engineering, feature stores, synthetic data generation, digital signal processing, and reproducible ML infrastructure for energy platforms.

Experience includes a strong research track record (140+ citations, €330K+ in funding), open-source contributions (700+ stars, 5K+ users), and work across startups, industry (400+ B2B users), and research labs, with hands-on software engineering in Python, Rust, Go, and C++.

WORK

INESCTEC

Researcher (15/01/2024 - Present)

• Lead architect and developer of Voltus, the feature store for the CLOUDIA4.eu energy platform within the ATE (Aliança para a Transição Energética) consortium
• Designed and implemented an LLM-driven automated feature engineering system using multi-agent workflows, scientific literature analysis, and self-healing Python code generation
• Led the implementation of synthetic time-series generation services for AI-EFFECT (Horizon Europe TEF), coordinating the Portuguese node with partners including TU Delft and Fraunhofer
• Designed and implemented 4 core services/modules across Voltus and AI-EFFECT, including stateless feature engineering services and reproducible ML workflows for GDPR-compliant energy AI experimentation
• Introduced MLOps practices, established structured experimentation, and mentored junior researchers
• Participated in conferences and workshops, presenting research and engaging with the scientific community

Match<IT>

Head of Data (17/03/2023 - 15/01/2024)

• Led the company’s AI/NLP strategy across research and production systems, aligning R&D delivery with business goals
• Led and mentored a multidisciplinary team of 15 researchers and developers, overseeing hiring, roadmapping, and execution
• Helped secure and manage funded R&D projects, including successful FAPESP PIPE proposals spanning €300K+ across two phases and the creation of 5 research positions
• Directed the transition of experimental NLP systems into deployed products, including a B2B virtual assistant used by 400+ companies and supplier-buyer matching solutions used by 200+ companies

AI/NLP Researcher (24/10/2022 - 17/03/2023)

• Designed and implemented classical NLP and similarity algorithms in production to match technology suppliers and buyers using structured and unstructured data
• Applied neural networks and modern NLP techniques to improve relevance, scalability, and robustness of matching pipelines
• Contributed directly to production-facing systems, bridging applied research and real-world deployment

UFRJ (Federal University of Rio de Janeiro)

Academic Operations Officer (27/01/2009 - 24/10/2022)

• Held a tenured federal position obtained through a highly competitive national selection process
  
• Operated across multiple institutional roles within one of the largest universities in Latin America, combining administrative leadership, data analysis, and process automation
• Led and supported digital transformation initiatives, including workflow automation, document digitalization, and internal information systems
• Designed analytical tools to assess academic performance and scholarly production, supporting strategic, evidence-based decision-making

Key roles and responsibilities included:

• Administration of the International Relations undergraduate program
  Responsibilities included visual identity creation, academic performance analysis, and evaluation of scholarly production metrics
• End-to-end management of the Philosophy graduate program
  Responsibilities included maintaining the program website, reporting to national evaluation bodies, and analyzing scholarly output
• Service as vice-chief of the IFCS financial center
  Assisted in budget planning, execution, and oversight of institutional projects
• Supervision of document flow and compliance processes within IFCS
  Implemented automation and digitalization solutions to improve efficiency, traceability, and institutional governance

EDUCATION

PhD in Industrial Engineering and Management (Portuguese recognition of foreign degree, 320240067419) U.PORTO (Porto University) (07/03/2024)

PhD in Production Engineering UFF (Fluminense Federal University) (01/08/2018 - 28/07/2022)

Visiting Research Fellow at ICCMR (Interdisciplinary Centre for Computer Music Research) University of Plymouth (01/01/2020 - 31/03/2020)

MSc in Production Engineering UFF (Fluminense Federal University) (01/03/2017 - 31/07/2018)

Bachelor’s Degree in Production Engineering CEFET (Federal Center of Technological Education) (01/03/2010 - 01/12/2015)

PROJECTS

2026 - Tect. Declarative programming language for architecture-as-code.

2026 - Scatters. Interactive, single-file HTML plots from data and audio.

2025 - CodeWeaver. CLI tool for converting codebases into LLM-ready Markdown.

2025 - Inscribe. Markdown preprocessor that executes embedded code.

2025 - CloudMapper. CLI to map and visualize cloud storage.

2024 - Dead Simple Blog Generator. Static websites from Markdown and HTML directories.

2023 - Piano Forte. Piano synthesizer based on a novel representation for quasi-periodic signals.

2022 - Omnes Sonos. Audio plugin leveraging neural networks for real-time sound synthesis.

2022 - Harmonic Compression. Lossy compression codec based on pseudo cycles. Registered in Brazil under the number BR512022000697-9.

2021 - Mark Book. Cross-platform songbook with Flutter. Available for Windows, Android and Web. Registered in Brazil under the numbers BR512022000618-9 BR512022000620-0.

2021 - Signal-envelope. A Python/C++ module to extract the envelope of digital signals. Registered in Brazil under the number BR512022000622-7.

2021 - BibRust. Bibliographic manager made in Rust. Registered in Brazil under the number BR512021000226-1.

2020 - Neural Piano. Neural-network-based piano software. Registered in Brazil under the number BR512020001653-7.

2018 - SongB. Songbook with chord detection, chord repositioning and optimized C++ code. Registered in Brazil under the number BR512020001654-5.

PUBLICATIONS

Valdecy Pereira | Marcio Basilio | Carlos Tarjano : Enhancing decision analysis with a large language model: pyDecision, a comprehensive library of MCDA methods in Python. Journal of Modelling in Management, August 2025. doi.org/10.1108/JM2-04-2024-0118.

Valdecy Pereira | Marcio Basilio | Carlos Tarjano : PyBibX - a Python library for bibliometric and scientometric analysis powered with artificial intelligence tools. Data Technologies and Applications, Volume 59, Issue 2, January 2025. doi.org/10.1108/DTA-08-2023-0461.

Carlos Tarjano : A general algorithm for the real-time emulation of pitched musical instruments and the singing voice. PhD Thesis - Production Engineering - Fluminense Federal University, 2022. dx.doi.org/10.22409/TPP.2022.d.11839251743.

Carlos Tarjano | Valdecy Pereira : An Efficient Algorithm For Segmenting Quasi-Periodic Digital Signals Into Pseudo Cycles: Application in Lossy Audio Compression. IEEE/ACM Transactions on Audio Speech and Language Processing, Volume 30, May 2022. doi.org/10.1109/TASLP.2022.3171969.

Carlos Tarjano | Valdecy Pereira : Envelope estimation using geometric properties of a discrete real signal. Digital Signal Processing, Volume 120, January 2022. doi.org/10.1016/j.dsp.2021.103229. Early manuscript available at arxiv.org/abs/2009.02860.

Carlos Tarjano | Valdecy Pereira : Signal-Envelope: A C++ library with Python bindings for temporal envelope estimation. arXiv, October 2021. doi.org/10.48550/arXiv.2110.11807.

Carlos Tarjano | Valdecy Pereira : Neuro-Spectral Audio Synthesis: Exploiting characteristics of the Discrete Fourier Transform in the real-time simulation of musical instruments using parallel Neural Networks. Lecture Notes in Computer Science Volume 11730, September 2019. doi.org/10.1007/978-3-030-30490-4_30.

Carlos Tarjano | Valdecy Pereira : Simulação de instrumentos musicais acústicos em tempo real utilizando redes neurais paralelas no domínio da frequência. Anais do XXXIX Encontro Nacional De Engenharia De Produção - ENEGEP, 2019. dx.doi.org/10.14488/ENEGEP2019_TN_STO_292_1654_37336.

Carlos Tarjano | Ruben Gutierrez | Valdecy Pereira : Traditional and alternative bibliometric indicators: assessing the evolution of interest in project management paradigms. Anais do XXXIX Encontro Nacional De Engenharia De Produção - ENEGEP, 2019. 2594-9713.

Carlos Tarjano : Redes neurais aplicadas à modelagem de instrumentos acústicos para síntese sonora em tempo real. Master’s Degree Thesis - Production Engineering - Fluminense Federal University, 2018. dx.doi.org/10.22409/TPP.2018.m.11839251743. Available online(Portuguese).

Carlos Tarjano | Valdecy Pereira : Neural Networks as a Tool for Big Data: The State of the Art. Anais do I Simpósio Internacional de Network Science - SINS, 2017. networkscience.com.br/anais/.

Carlos Tarjano | Magda Leite | Paula Purcidonio : O Processo de Desenvolvimento de Produtos em Startups Baseadas em Inovação Criativa. Espacios. Vol. 37 (Nº 07). Pág. 6, 2016. 0798 1015.

MISCELLANEOUS

2025 - Conference. Energy Technology Open Day. Presentation: Language Models for Automatic Feature Engineering. Porto, FEUP (October 15th).

2025 - Conference. Conferência ATE: Liderar a mudança: soluções para um novo paradigma energético. Stand showcasing the CLOUDIA4.eu platform MVP, the Voltus Feature Store, and synthetic time series generation results. I was particularly responsible for the Voltus Feature Store. Porto, Super Bock Arena (June 26th).

2025 - Blog. The Fortnightly Tambourine. A blog aimed at popularizing science.

2025 - Peer Review. Multiple article reviews for EURASIP Journal on Audio, Speech and Music Processing.

2025 - Peer Review. Multiple article reviews for Journal of Informetrics.

2023 - Competition. Neural Audio Plugin Competition. Organized by The Audio Programmer and Neutone. Presentation of the Piano Forte project.

2023 - Funding. Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE. Preparation of a successful funding proposal for the Brazilian agency FAPESP, securing total funding of R$ 1.000.000,00 (approximately 160.000 euros). More details at orcid/funding.

2023 - Interview. Adeus aos longos formulários: como especificar projetos com conversas simples. Interview as Match<IT> Head of Data about conversational agents.

2019 - Conference. XXXIX Encontro Nacional de Engenharia de Produção (ENEGEP). Oral presentation of the paper “Simulação de instrumentos musicais acústicos em tempo real utilizando redes neurais paralelas no domínio da frequência”.

2019 - Conference. XXXIX Encontro Nacional de Engenharia de Produção (ENEGEP). Oral presentation of the paper “Traditional and alternative bibliometric indicators: assessing the evolution of interest in project management paradigms”.

2017 - Conference. I Simpósio Internacional de Network Science (SINS). Oral presentation of the paper “Neural Networks as a Tool for Big Data: The State of the Art”.

2014 - Crowdfunding campaign. Carcara Eco Footwear. Crowdfunding campaign for a line of eco-friendly shoes.

SKILLS