Hire the Best Database Development Professionals

I'll help your business get work done faster and easier with a Claris FileMaker custom app, as I have done with clients in a variety of industries. I know your team has a unique mix of goals and obstacles - so I listen carefully and customize a system that fits your needs. I can build a new solution from scratch or improve on what you've got. Claris FileMaker Pro Expert Certified Upwork Expert Vetted Top 1% Skills: Needs assessment Database schema UI/UX design Desktop and mobile applications Automation scripts Server and client app deployment Database maintenance Data cleanup and normalization AI Integration Automated data exports PDF outputs Barcodes and QR codes Custom UI graphics Image scanning Photo correction User training Selected Projects: UC Berkeley Archaeology (Research) Wells Fargo Entities (Research) BrighterShop (Inventory / POS) VideoFax (Inventory / Rental) Wells Fargo Stagecoach (Event Planning) Wells Fargo Mobile Response (Event Planning) Metro Events (Event Planning) ArtSpan (Event Planning) W. R. Hearst Archive (Collections) Mark Garrett Studio (Collections) Ron Z Photo Collection (Collections) Fine Arts Museums of SF (Collections) Codifi (Task Tracking) One Salute (Task Tracking) Metro Building Services (Marketing) Sanchez Art Center (ERP) Endorsements: "Rob Costin's work quality is excellent. Rob is always professional, open to suggestions and easy about making adjustments. He's also able to work well under time constraints." - Michael Oddo "I have worked with many world-class technologists in my 25-year career, Rob is all of that technically and a whole lot more as a human being... He is the consummate professional, a stellar member of any community" - Brian Kenny "Rob has been working and collaborating with me and our organization for many years. Rob is a remarkable professional, impeccable with his word, meticulous with his work." - Michael Ashley "Rob’s professional and well organized approach to this task provided me with a clearer understanding of not just the contents of my archive but a useful tool for getting it out there to the rest of the world. His ability to hear my needs and ask the right questions allowed me to have a fully functioning database in relatively short order." - Mark M. Garrett "Rob Costin has my wholehearted endorsement... I could not have been successful these past decades without Rob's professional and timely support." - Michael Mullin

Your operations are only as fast as your data systems. If your team is still fighting spreadsheets, re-entering data manually, or waiting on reports that should run themselves, that’s the problem I fix. I build professional MS Access databases, VBA automation, Excel systems, SQL Server backends, and Power BI dashboards for growing businesses that need reliable systems without IT overhead. With $200k+ delivered across 100 projects on Upwork, a Top Rated Plus track record, and 20+ years in MS Access, VBA, Excel, and SQL Server, I’ve solved these problems across shipping, finance, manufacturing, compliance, and hospitality. ⭐️ "Perhaps the highest skill level I've seen in the database space." - Paul Cracknell, OSR Enterprises What I deliver • Access CRMs and order systems that run smoothly from day one and scale with your team • Excel dashboards and KPI tools that turn raw data into decisions in seconds • VBA automation that removes hours of manual work in Excel, Outlook, and reports • Secure, multi-user Access apps with Azure or SQL Server backends • Fast, low-disruption database upgrades, migrations, and optimization Proven results • Automated invoicing system that cut billing delays by 80% • Excel reporting solution that saved 15+ hours every month • Compliance database now used daily by AML teams across departments • SQL Server migration for 25+ users with zero downtime Clients work with me because I understand both the technical side and the business workflow. I don’t just build tables, forms, and reports. I help clarify the process, remove unnecessary manual work, and create a system your team can actually use every day. I also have demo solutions available, including Access CRM, inventory, quoting, invoicing, and reporting systems, so you can quickly see the type of work I deliver before starting. Tell me what’s slowing you down. I’ll outline a clear plan before you commit to anything.

⭐⭐⭐⭐⭐"Cecile works very hard to make the product right. She has very deep skill in Excel macros developments. Totally recommended. She did a very good job with the work! Kudos!". --- With over 10 years of experience working with Microsoft Access, I specialize in building, fixing, optimizing, and improving business-critical databases. Whether you need a brand-new database from scratch or help with an existing system, I can deliver a reliable and efficient solution tailored to your needs. What I can do for you: ✔ Design and build custom Microsoft Access databases from the ground up ✔ Fix errors, crashes, and corrupted databases ✔ Optimize performance (slow queries, large databases, inefficient design) ✔ Develop advanced forms, reports, and VBA automation ✔ Refactor and clean up legacy systems built over many years ✔ Assist with migration or modernization when needed I’ve worked with real-world business systems used for operations, reporting, and data management—so I understand how critical reliability and accuracy are. My approach is straightforward: diagnose issues quickly, communicate clearly, and deliver solutions that last. If you already have an existing database, I can review it and recommend improvements. If you’re starting from scratch, I can design a system that is scalable, organized, and easy to use. ⭐ Why you should choose me over other freelancers ⭐ ✅ Client Reviews: I focus on providing value to all of my clients and earning their TRUST. ✅ Over-Delivering: this is core to my work as a freelancer. My focus is on giving more than what I expect to receive. ✅ Responsiveness: being extremely responsive and keeping all lines of communication readily open with my clients. ✅ Resilience: reach out to any of my current or former clients and ask them about my resilience. For any issue that my clients face, I attack them and find a solution. ✅ Kindness: one of the main aspects of my life that I implement in every facet. Treating everyone with respect, understanding all situations with empathy, and genuinely wanting to improve my client's situations. 🏆 Below are some client reviews from Upwork: 🏆 The client reviews below describe the quality of work and value that you can expect from working with me. ⭐⭐⭐⭐⭐ "Totally recommended. She did a very good job with the work! Kudos!" ⭐⭐⭐⭐⭐ "Cecille is a great freelancer! And very easy to work with. She was able to help me with database project, advance programming (Pseudocode) and HTML5/CSS. I will continue to use her in the future! 100% recommended." ⭐⭐⭐⭐⭐ "Cecille has been a really great help given the small amount of time. She provided a great result with quick turn around time. Easy to communicate with and has a very keen attention to details. Looking forward to work with her for future projects. I highly recommend her to anyone who needs a fast result." ⭐⭐⭐⭐⭐ "Thank you Cecile for support and talent teamwork. 100% recommended for any project Excell VBA. Lets star a new project soon. I will contact you." Send me a message with a brief description of your project—I’ll let you know how I can help.!

AI/ML Engineer & Python Developer with 8+ years of experience and 140+ completed projects on Upwork - specializing in intelligent automation systems, custom chatbot solutions, and robust backend development. What I Build: - Agentic AI systems & AI-powered automation workflows - Custom chatbot solutions tailored to your business needs - Automation pipelines using n8n and similar tools - Web scraping solutions for data extraction at scale - WordPress custom plugin development - REST API integrations & backend architecture Core Tech Stack: Python | Django | FastAPI | Agentic AI | n8n | OpenAI | LangChain | BeautifulSoup | Scrapy | WordPress | MySQL | PostgreSQL | REST APIs Why Work With Me: With 140+ successfully delivered projects, I bring a proven track record of turning complex requirements into clean, scalable solutions. Whether you need a smart chatbot, an end-to-end automation workflow, or a Python powered backend - I deliver on time and within scope. Let's discuss your project. Send me a message !

INTRODUCTORY I am a Advanced/Expert Microsoft Access Developer with over 20+ years (since 2001) Access experience. I can import/export your data, I can either modify an existing system or design a system from scratch based on your requirements, recommendations and direct input. I have many professional references that can attest to my easy-to-use, professional, robust and economical Microsoft Access databases. I am a great communicator and great documenter and can provide necessary training as needed. From a technical prospective, I fully utilize VBA coding (not macros) for my development style, I am well experience in SQL and can assist with older versions of Microsoft Access. I am very timely and available to discuss your system needs within a few minutes of our initial conversation. Find below some of my Microsoft Access Database Accomplishments: • Designed 7 Access DB’s for various teams to track productivity, appeals, complaints, etc. • Assisted in 20% decrease in TAT (turn-around-time) by creating 3-month analysis reporting • Designed Microsoft Access database used by 20+ users to store and track “do-not-call” members) • Designed Microsoft Access database that automated a previous manual process (saves 4.5 man hours) • Designed Microsoft Access database for handling over 600,000+ transactions per year and calculations. • Created email and fax interface ability within Microsoft Access System. • Designed Microsoft Access database responsible for State Parks reservations (55 state parks) • Designed Microsoft Access Payroll system, accruals, W-2 printing, weekly paychecks. • Designed Microsoft Access Elderly Abuse Tracking for Clark County (Las Vegas). • Designed Microsoft Access System for Storage Units. • Designed Microsoft Access System to track employees qualifications for working at Refineries. • Designed Microsoft Access System for tracking & entering cell phone payments. • Designed Microsoft Access Video check out system (equivalent to Block Buster). • Designed Microsoft Access Bail bond system (still current/active) • Designed Microsoft Access Payday Loan system (still current/active) • Designed Microsoft Access Title Loan system (still current/active) • Designed a time tracker/cost system keeps track of employee’s time (still current/active) • Designed Microsoft Access Asset Tracking System • Designed Microsoft Access Certified Training/Curriculum system • Designed Microsoft Access Salary Review/Compensation Tracker system for bonus structures • Upgraded many MS Access databases from previous version (i.e. 2000 to 2003 or 2003 to 2010, etc)

Slow databases? Production outages? Performance bottlenecks affecting your business? I help organizations identify root causes, optimize database performance, and build reliable database platforms. I am a senior database administrator (DBA) with over 13 years of hands-on experience managing production database systems. I specialize in MySQL, MariaDB, PostgreSQL, MongoDB, Oracle , and SQL Server, providing database troubleshooting, incident response, daily operations and maintenance, performance optimization, and reliable backup, high availability, and disaster recovery solutions for mission-critical environments. 🔍 Database Expertise: With over 13 years as a senior expert in MySQL/MariaDB/Percona/PostgreSQL/MongoDB/Oracle/SQL Server/DuckDB, I’ve managed over 5000 databases and 300 TB+ of data. My experience covers database architecture, performance optimization, backup and recovery, High availability, disaster recovery, and much more. I ensure every database solution I deliver is robust, scalable, high performance, and perfectly aligned with your business needs. 🛠️ Technology Stack: MySQL/Percona (Versions 5-9) MariaDB (Versions 5-12): Installation、High Availability, Replication, and Scalability Solutions、InnoDB Cluster、Group Replication、Workbench/Shell/Router、Backup & Restore、Galera Cluster、Percona XtraDB Cluster、XtraBackup、Toolkit、InnoDB/MyISAM/Binlog、Orchestrator、replication-manager. PostgreSQL (Versions 7-18): Installation、High Availability, Replication, and Scalability Solutions、SQL Tuning、pgpool-II、PostGIS、TimescaleDB、ClickHouse、Patroni、Citus、pgvector、Security、Supabase、Neon. MongoDB (Versions 3-8) / MongoDB Atlas : Installation、MongoDB Shell (mongosh)、Aggregation、Indexes、Atlas、Time Series、Change Streams、Replication、Sharding、Storage、Administration、Security. SQL Server (Versions 6.5 – 2025): Installation、High Availability and Disaster Recovery (Always On AG, FCI, Log Shipping, Replication)、Distributed Availability Groups、SQL Server Management Studio / Azure Data Studio / sqlcmd、Backup & Restore、Failover Cluster / Always On Solutions、PowerShell dbatools / First Responder Kit、Storage Engine / Transaction Log / Change Data Capture. Other Database : Oracle、DB2、Redis、SQLite、DuckDB、DocumentDB Cloud service providers: AWS RDS、AWS Aurora、Amazon DocumentDB、GCP、Azure、N8N creator. Certifications: I hold certifications from Cisco, Oracle, MySQL, AWS, ITIL, PMP, and TOGAF, ensuring I bring industry-recognized expertise to every project. 📈 Why Choose Me? Proven Experience: Worked for leading ICT and IoT solution providers, supporting major operators, banking, and financial enterprises. End-to-End Solutions: From designing high availability architectures to delivering query optimizations and backup solutions, I offer complete database management expertise. Training & Support: I also provide course training for companies looking to empower their teams with database-related skills. 🤝 Let’s Collaborate: If you’re looking for a seasoned database professional to tackle challenges in MySQL, PostgreSQL, MongoDB, Oracle, or other database technologies, let’s discuss how I can help streamline your operations and enhance performance. 📩 Contact Me: I’m ready to dive into your project. Reach out, and let’s unlock the full potential of your data infrastructure together!