Ignacio Lizarralde
About
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Engineering Manager at Upwork
Tandil, Buenos Aires Province, Argentina
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Résumé
Jobs
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Senior Software EngineerWebflowDec 2025 - Current (10 months)- Senior Fullstack EngineerCanary TechnologiesDec 2024 - Dec 2025 (1 year 1 month)At Canary Technologies, I work as a fullstack engineer on the Guest Foundations team, focusing on the company’s messaging platform — a core product that enables hotels to communicate seamlessly with their guests throughout the stay. The stack is primarily Django (Python) on the backend and Vue.js on the frontend.
Our work directly impacts the guest experience, helping hotels streamline check-in, provide real-time support, and drive engagement through personalized messaging. I collaborate closely with product, design, and other engineering teams to build new features, improve system reliability, and ensure scalability as we grow. - Senior Engineering Lead - Client Retention and ActivationUpworkFeb 2024 - Nov 2024 (10 months)
- Engineering Lead - Acquisition / Growth PlatformUpworkDec 2020 - Apr 2024 (3 years 5 months)• Led the engineering team responsible for developing and maintaining key acquisition and growth platforms, contributing to a significant increase in user acquisition and overall platform growth.
• Architected and maintained the majority of the visitor-facing pages on Upwork.com, including the homepage, SEO-optimized pages, and key landing pages, resulting in improved site performance and higher conversion rates.
• Played a crucial role in the successful integration of SEO strategies within the platform, leading to a notable increase in organic traffic. - Pod Technical Leader - Upwork Talent Lifecycle TeamUpworkFeb 2020 - Dec 2020 (11 months)
- Senior Backend Software Engineer - Upwork Enterprise TeamUpworkMar 2019 - Feb 2020 (1 year)• Developed and maintained scalable backend solutions to support Upwork’s enterprise customers, enabling large businesses to effectively utilize the platform.
• Collaborated closely with product management and design teams to deliver high-quality, innovative solutions tailored to enterprise-level needs.
• Managed microservices architecture, leveraging technologies such as Java, Dropwizard, and Amazon ECS, to ensure robust and efficient backend operations.
Backend: Microservices, Java, Dropwizard, Guice, Hystrix, Archaius, RXJava, Eureka, Zipkin, Amazon EC2, Amazon ECS.
Frontend: Vue.js, Nuxt.js, Vuex, SASS. - TTechnical LeaderApr 2016 - Oct 2016 (7 months)• Led a cross-functional team in the successful delivery of multiple enterprise-level Java applications, leveraging a variety of technologies including Spring, Spring Boot, Apache Camel, Active MQ, Postgres, Java EE, Hibernate, Docker, Jenkins, and Ansible.
• Architected and implemented a comprehensive refactoring of a critical loan system, resulting in a 50% reduction in codebase while maintaining full functionality and improving system performance.
• Enhanced team productivity by streamlining communication and collaboration processes, ensuring alignment across all project phases and successful project delivery. - BJava Software EngineerBlitz IT S.A.Jan 2016 - Apr 2016 (4 months)
- PhD StudentCONICETApr 2014 - Mar 2019 (5 years)Research Focus: Application of Data Mining, Machine Learning, and Natural Language Processing for Information Retrieval
• Named Entity Expansion Technique: Developed an innovative method for expanding Named Entities in Web Service descriptions, leading to a significant 27% improvement in the probability of finding relevant services within the top three search results compared to existing approaches.
• Structural-Semantic Algorithm: Designed a cutting-edge Structural-Semantic algorithm to optimize service selection from Web Service registries, achieving an impressive 86% increase in the retrieval of relevant services over traditional methods.
Education
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- Analyst Programmer, Computer Software EngineeringUniversidad Nacional del Centro de la Provincia de Buenos Aires
- Systems Engineering, Computer Software EngineeringUniversidad Nacional del Centro de la Provincia de Buenos Aires
- Systems Engineering Computer Software EngineeringUniversidad Nacional del Centro de la Provincia de Buenos Aires
- Analyst Programmer Computer Software EngineeringUniversidad Nacional del Centro de la Provincia de Buenos Aires
- doctor, Doctor of Philosophy (Ph.D.) Computer ScienceUniversidad Nacional del Centro de la Provincia de Buenos AiresJan 2014 - Jan 2019 (5 years 1 month)
- Doctor of Philosophy (Ph.D, Computer ScienceUniversidad Nacional del Centro de la Provincia de Buenos AiresJan 2014 - Jan 2019 (5 years 1 month)
Projects (professional or personal)
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- SSmartwebService Registry that utilises Data mining, Machine Learning and Natural Language techniques to improve web service retrievability.
- RRocket ServerWebmail backend using NodeJS with Express.
- RRocket WebmailWebmail frontend using React and Redux.
Awards
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- CMencion de HonorConferências IberoAmericanas WWWInternet e ComputaçãoMención de honor por "Un enfoque semántico-estructural para la selección de servicios web". 13ª Conferências Ibero-Americanas WWW/Internet e Computação Aplicada, Florianópolis, Santa Catarina, Brasil.
- NTICS ScholarshipNational Agency for Science and Technology Promotion ANPCyT
- Sadosky AwardFundación SadoskyBest paper award for "An energy-saving model for service-oriented mobile application development". 43 Argentine Conference on Computer Science and Operations Research (JAIIO)
- Doctoral Research ScholarshipCONICET
Publications
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- SWord embeddings for improving REST services discoverabilitySimposio Latinoamericano de Ingeniería de Software CLEI In Computing Conference CLEI XLIII Latin American IEEE Córdoba Sep
- PAn energy-saving model for service-oriented mobile application developmentProceedings of the th Argentine Symposium on Software Engineering ASSE Argentine Conference on Computer Science and Operations Research JAIIO SADIO ISSN pp Autonomous City of Buenos Aires Argentina
- JExploiting named entity recognition for improving syntactic-based web service discoveryJournal of Information Science AugLizarralde, I., Mateos C. M., Rodriguez, J. M., & Zunino, A. Exploiting named entity recognition for improving syntactic-based web service discovery. Journal of Information Science, 1-18. (2018).
- IMining Social Web Service repositories for social relationships to aid service discoveryIEEEACM th International Conference on Mining Software Repositories JanCorbellini, A., Godoy, D., Mateos, C., Zunino A,. & Lizarralde, I.
- IDiscovering web services in social web service repositories using deep variational autoencodersInformation Processing Management JulWeb Service registries have progressively evolved to social networks-like software repositories. Users cooperate to produce an ever-growing, rich source of Web APIs upon which new value-added Web applications can be built. Such users often interact in order to follow, comment on, consume and compose services published by other users. In this context, Web Service discovery is a core functionality of modern registries as needed Web Services must be discovered before being consumed or composed. Many efforts to provide effective keyword-based service discovery mechanisms are based on Information Retrieval techniques as services are described using structured or unstructured textdocuments that specify the provided functionality. However, traditi
- ªUn enfoque semántico-estructural para la selección de servicios web.ª Conferências IberoAmericanas WWWInternet e Computação Aplicada ISSN pp Florianópolis Santa Catarina Brasil Nov
- IA structural-semantic web service selection approach to improve retrievability of web servicesInformation Systems Frontiers DecGarriga, M., De Renzis, A., Lizarralde, I., Flores, A., Mateos, C., Cechich, A., & Zunino, A. Information Systems Frontiers, 1-26.