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Experienced developer with management experience leading cross-functional and cross-site software development teams at Microsoft, IBM, and Huawei, with full-time work across software development, software testing, program management, and research. Collaborative, mentoring-focused leader comfortable as both individual contributor and manager, with strong product design, implementation, architecture, and customer advocacy skills. PhD-level researcher with excellent writing skills and work experience across healthcare, banking, and FinTech, plus up-to-date certifications in Generative AI and Big Data/ML.…Experienced developer with management experience leading cross-functional and cross-site software development teams at Microsoft, IBM, and Huawei, with full-time work across software development, software testing, program management, and research. Collaborative, mentoring-focused leader comfortable as both individual contributor and manager, with strong product design, implementation, architecture, and customer advocacy skills. PhD-level researcher with excellent writing skills and work experience across healthcare, banking, and FinTech, plus up-to-date certifications in Generative AI and Big Data/ML.

Arun Marathe

AI Prompt Engineer, Back-End Developer, Cloud Developer, +7

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Experienced developer with management experience leading cross-functional and cross-site software development teams at Microsoft, IBM, and Huawei, with full-time work across software development, software testing, program management, and research. Collaborative, mentoring-focused leader comfortable as both individual contributor and manager, with strong product design, implementation, architecture, and customer advocacy skills. PhD-level researcher with excellent writing skills and work experience across healthcare, banking, and FinTech, plus up-to-date certifications in Generative AI and Big Data/ML.…Experienced developer with management experience leading cross-functional and cross-site software development teams at Microsoft, IBM, and Huawei, with full-time work across software development, software testing, program management, and research. Collaborative, mentoring-focused leader comfortable as both individual contributor and manager, with strong product design, implementation, architecture, and customer advocacy skills. PhD-level researcher with excellent writing skills and work experience across healthcare, banking, and FinTech, plus up-to-date certifications in Generative AI and Big Data/ML.

Available to hire

Experienced developer with management experience leading cross-functional and cross-site software development teams at Microsoft, IBM, and Huawei, with full-time work across software development, software testing, program management, and research. Collaborative, mentoring-focused leader comfortable as both individual contributor and manager, with strong product design, implementation, architecture, and customer advocacy skills. PhD-level researcher with excellent writing skills and work experience across healthcare, banking, and FinTech, plus up-to-date certifications in Generative AI and Big Data/ML.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

AI Prompt Engineer, AI Model Trainer at Mercor

April 1, 2025 - Present

Trained widely used LLMs and created PhD-level prompts that challenge model reasoning. Provided detailed reasoning/annotated data to improve model behavior in specific domains. Graded LLM responses across multiple dimensions such as topic/completeness, factuality, locality, and freshness, and worked with audio/video/image/textual data. Training efforts spanned computer science, combinatorics, graph theory, discrete mathematics, reinforcement learning, and English language.

Senior Data Engineer at Perfecti.io

February 1, 2025 - Present

Founding member of a FinTech startup; designed and implemented an ETL pipeline; advised on business strategy, technical roadmap, work prioritization, data acquisition, and quality assurance.

AI Prompt Engineer at Mercor

February 1, 2025 - Present

Train widely used AI models by creating context+prompt combinations and providing detailed chain-of-thought reasoning to guide LLMs in domain-specific problem solving, with emphasis on improving domain intelligence for targeted tasks.

Principal Software Engineer at PointClickCare

November 1, 2023 - February 1, 2025

Deleted 3 TB of data from PACMan data warehouse; improved SQL Azure ETL/ELT pipelines to reduce data freshness from 12 to 3 hours; disseminated SQL best practices; analyzed Minimum Data Set (MDS) data using Python and ML to derive healthcare insights.

Principal Engineer at Huawei Technologies Canada

October 1, 2018 - May 1, 2023

Optimized two key operators in Huawei's Omni runtime engine by about 60% (2.2x); evaluated Trino and ClickHouse performance; led university research projects; pioneered intelligent cloud DBMS concepts for telemetry insights, anomaly detection, and SQL transaction clustering; contributed to ICDE 2022 and EDBT 2022 papers; US patent on related work.

Senior Software Developer & Architect at VersaBank

December 1, 2011 - September 1, 2018

Architected and led the bank's first micro-service deployment using SOA; implemented authentication/authorization with .NET/C#; integrated open-source packages; built a Django/Python front-end for a deposits management system; designed an API bridging SQL Server and Django/Python; improved SQL Server performance and delivered FATCA/regulatory reporting.

Senior Software Developer (Research) (Contract) at York University

January 1, 2010 - November 1, 2011

Collaborated with a Computer Science professor to develop and prototype AI algorithms. Implemented a Go-player in Java using knowledge representation and machine learning techniques (expert-level on small boards and predating AlphaGo Zero by several years). Explored MapReduce-style web-scale data processing for applications in data mining, search architecture, and web advertising. Served as external technical reviewer of a major Big Data textbook.

Senior Software Developer (Research) at York University

January 1, 2010 - November 1, 2011

Collaborated with a CS professor to prototype AI algorithms; implemented a Java-based Go player using novel knowledge representation and ML techniques; explored MapReduce-style big data processing with applications in data mining and search architectures.

Project Manager at xkoto Inc.

January 1, 2008 - January 1, 2009

Managed a project with 15 software architects, developers, and testers; shipped GRIDSCALE database load balancing product for DB2/SQL Server; coordinated benchmarks (TPC-W, custom app) and customer interactions via Salesforce.

Advisory Software Developer at IBM Toronto Lab

January 1, 2006 - January 1, 2008

Co-led a 15-person global team using agile methods to deliver three releases of IBM's data warehouse appliance (E7000, E7050, E7100); collaborated with Sun Microsystems on a 3 TB TPC-H benchmark; evaluated DB2 data compression and deployment scenarios.

Program Manager at Microsoft

January 1, 2002 - January 1, 2006

Shipped SQL Server 2005 by enhancing query processing and tuning; authored functional specs; managed 25 developers across three teams; helped bring Data Tuning Advisor (DTA) from Microsoft Research to product readiness; co-inventor of SQL Server showplans in XML.

Senior Software Developer at Open Text Corporation

January 1, 2001 - January 1, 2002

Developed incubation products using XML technologies (DTD/XML Schema/Relax NG, XSLT, XQuery, SAX/DOM/Java); contributed to XML-based tooling for content management.

Development Analyst at IBM Toronto Lab

January 1, 1995 - January 1, 1995

Tested the IBM XLF V4R1 FORTRAN 90 compiler and, within four months, opened over 100 defects.

Development Analyst at IBM

January 1, 1995 - January 1, 1995

Tested IBM XLF V4R1 FORTRAN 90 compiler; identified and opened over 100 defects in four months.