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Feladatok - Komplex adatmigrációs projektek end-to-end tervezése és megvalósítása: forrás–cél rendszerek feltérképezése adatmodellek, mappingek és transzformációs szabályok definiálása - Meglévő (legacy) adatbázisok és adatfolyamok elemzése, modernizációjának támogatása - Adatmigrációs és adatátalakítási folyamatok implementálása és felügyelete - SQL-alapú és ETL jellegű megoldások fejlesztése: PostgreSQL/MSSQL környezetben - Migrációs validációs, adatminőségi és kontroll mechanizmusok kialakítása reconciliation, ellenőrző riportok, idempotens betöltések - Technikai döntések előkészítése: batch vs. incremental megközelítés reprocessing, rollback, cut-over stratégiák - Szoros együttműködés üzleti és IT oldali stakeholderekkel - Migrációs dokumentáció készítése (mapping dokumentumok, technikai leírások) Elvárások - Erős SQL tudás, összetett lekérdezések, transzformációk és optimalizálás - Tapasztalat adatmigrációs projektekben (nem csak ETL fejlesztés) - SQL fejlesztési tapasztalat (PostgreSQL / MSSQL előny) - Magabiztos adatmodellezési és adatértelmezési képesség - Legalább egy scriptelési / programozási nyelv ismerete (előny: Python, vagy bizonyított gyors tanulási képesség) - ETL / adatfeldolgozási folyamatok átlátása és fejlesztési tapasztalat - Önálló, strukturált munkavégzés, komplex rendszerek gyors megértése - Jó kommunikációs készség, technikai és üzleti oldal közötti „fordítás” képessége Előnyt jelent - Telekommunikációs (OSS/BSS) környezetben szerzett tapasztalat - Nagy volumenű adatokkal végzett munka - Airflow vagy más orchestration eszköz ismerete - Shell/Bash szkriptek használata automatizálási célokra - API-alapú adatbetöltések és rendszerintegrációk ismerete - Data quality, data governance vagy reconciliation tapasztalat - Teljesítményoptimalizálási és refaktorálási gyakorlat Munkakörnyezet - Nagyvállalati, komplex IT környezet - Heti 40 órás munkavégzés - Hosszú távú, stabil migrációs projekt - Valódi szakmai döntési tér, nem csak végrehajtás - Tapasztalt szakemberekből álló csapat
Project ID: 40182422
22 proposals
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Active 2 mos ago
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22 freelancers are bidding on average $34 USD/hour for this job

⭐⭐⭐⭐⭐ Dear Valuable Client, CnELIndia, led by Raman Ladhani, is well-positioned to support your end-to-end data migration initiative. We bring deep expertise in SQL, PostgreSQL/MSSQL development, and ETL processes, ensuring robust mapping, transformation, and validation of source-to-target systems. Our team excels in analyzing legacy databases, modernizing data flows, and implementing batch or incremental migration strategies with reconciliation, rollback, and cut-over controls. We combine strong data modeling skills, Python scripting, and orchestration knowledge to automate and optimize migration pipelines. By collaborating closely with both business and IT stakeholders, we ensure accurate documentation, high data quality, and governance compliance, while providing performance tuning and efficient processing for large datasets. Our structured, hands-on approach guarantees seamless delivery and measurable project success.
$38 USD in 40 days
6.8
6.8

Greetings! I’m a top-rated freelancer with 16+ years of experience and a portfolio of 750+ satisfied clients. I specialize in delivering high-quality, professional services tailored to your unique needs. Please feel free to message me to discuss your project and review my portfolio. I’d love to help bring your ideas to life! Looking forward to collaborating with you! Best regards, Revival
$25 USD in 40 days
2.9
2.9

Hello there, I'm Valentino and I'm a Senior Software Engineer with over 20 years experience mainly in the banking, financial services, and telecom industries. I'm well-versed in end-to-end migration orchestration from planning, migration strategy development with stakeholders, writing the Migration and Disaster Recovery Plans, up to actual cut-over execution and post-migration activities. I have delivered migration projects for big enterprise clients such as: - For a universal bank in the Philippines, I led a team that migrated the bank's 17-year-old Trade Finance System (based on SWIFT "MT700 - MTxxx" series) from legacy COBOL + Oracle DB to Apache Grails + IBM DB2. - For a high-technology company in the hardware space, I migrated their Gluu Server from v0.1 to v2.4.2. I developed the migration strategy and disaster recovery plan and also wrote the Groovy script that migrated the OpenDJ LDAP delta schema and data. I'm also a state-certified Electronics and Communications Engineer (with PRC ECE license) and I have worked on projects for one of the biggest telecom operators in the Philippines, both as software engineer and training instructor. I have worked with all types of databases: SQL, NoSQL, LDAP, and Vector. My database expert skills include: - SQL: ANSI and non-ANSI flavors (PL/SQL, T-SQL including cursors) - Database design and normalization techniques - Query optimization - Stored procedures Thank you for reading my proposal. Best, Valentino
$35 USD in 40 days
2.2
2.2

Hello, I’m Ankur, a freelance developer with a dedicated team of professionals. I read all your requirements for website and I assure you that I will provide high-quality work at the proper time. Additionally, we also provide you 3 months of support from our side. As a Full Stack Developer, I specialize in Web and App Development, boasting a portfolio of stunning projects with top-notch UI/UX design. My expertise spans Flutter (for both Android and iOS), PHP, and WordPress, and I bring over 7 years of experience to the table. Whether it’s websites, applications, or e-commerce platforms, I’ve got you covered. But I’m not limited to just coding. My skill set extends to graphic design and logo creation, offering you a one-stop solution for all your project needs. With a track record of over 500 completed projects, I am committed to delivering nothing short of excellence. My ultimate goal is your complete satisfaction. Thank you for considering me for your project. I’m ready to transform your vision into a reality that stands out in today’s competitive landscape. Best Regards, Ankur Hardiya
$38 USD in 40 days
0.2
0.2

Hello Anita, I am thrilled to submit my proposal for the Senior Adatmigrációs Szakértő position. Your project, which involves complex data migration and modernization, aligns perfectly with my expertise and passion for delivering robust data solutions. With extensive experience in end-to-end data migration projects, I have honed my skills in mapping source and target systems, defining data models, and implementing SQL and ETL solutions, particularly within PostgreSQL and MSSQL environments. My strong background in SQL development, combined with my proficiency in Python scripting, equips me to handle complex queries and transformations efficiently. Your emphasis on collaboration between business and IT stakeholders resonates with my professional approach, as I excel in translating technical concepts into business-friendly language. I am adept at creating comprehensive migration documentation, ensuring clarity and alignment throughout the project lifecycle. Furthermore, my experience with large-scale data environments and orchestration tools like Airflow positions me to add significant value to your team. I am also familiar with data quality and governance, ensuring high standards in reconciliation and validation processes. I am eager to bring my skills to your project and contribute to its success. I am available to start immediately and look forward to the opportunity to work with your team. Best Regards, George M.
$25 USD in 14 days
0.0
0.0

With respect to your priorities outlined for the Senior Adatmigrációs Szakértő role, my background as a full-stack developer with a specialization in Python uniquely positions me to effectively address your project needs. I possess a strong grasp of SQL and its various applications - from developing complex queries to optimizing them as needed. I am not only proficient in ETL development but have also worked extensively on data migration and modernization projects, leveraging batch and incremental approaches, and rollbacks, reprocessings, and cut-over strategies amongst others. This project, further amplified by an OSS/BSS environment is precisely aligned with my experience. In addition to having worked with large volumes of data successfully, I have utilized orchestration tools like Airflow for similar purposes. Benefiting from past projects in the domain, I am also well-versed in automation through shell/bash scripts and API-based data loads. Complimenting this are my skills in data quality, governance, reconciliation and performance optimization paralleling increased demands at scale.
$38 USD in 40 days
3.4
3.4

Hello, thanks for posting this project. Your requirements for end-to-end data migration, advanced SQL work, and collaboration in a complex enterprise environment match my expertise perfectly. I have proven experience with both legacy analysis and modern ETL development, and am comfortable designing robust validation and reconciliation mechanisms. My ability to navigate between technical and business stakeholders ensures efficient delivery and transparent documentation. I am fully equipped to support your migration, transformation, and modernization goals. Warm regards, Vitalii
$30 USD in 1 day
0.0
0.0

Kedves Megrendelő, Kiterjedt tapasztalattal rendelkezem komplex adatmigrációs projektek tervezésében és végrehajtásában, beleértve SQL-alapú fejlesztéseket, ETL folyamatokat és adatelemzést PostgreSQL/MSSQL környezetben. Erős SQL-ismereteim mellett jártas vagyok adatmodellezésben, transzformációs szabályok kidolgozásában, valamint nagyobb adatmennyiségek kezelésében. A technológiai döntések előkészítésében és validálási folyamatok kialakításában is tudok hozzájárulni, mindig a hatékonyságra és adatminőségre fókuszálva. Azonnal tudom kezdeni a munkát, és garantálom a pontos, magas színvonalú eredmények szállítását. Várom a közös együttműködést.
$25 USD in 2 days
0.0
0.0

Hi, how are you? I think the main tasks are designing and implementing complex data migration projects, analyzing legacy databases, and developing SQL-based solutions in PostgreSQL/MSSQL environments. I have hands-on experience in data migration projects and strong SQL skills, including complex queries and transformations. I will put my solutions in the following approach: - Map source and target systems while defining data models and transformation rules. - Analyze existing data flows and provide support for their modernization. - Implement and oversee data migration and transformation processes. I can start immediately and complete the work within a short timeline. I’ve worked on similar projects where I modernized legacy systems and ensured data quality through effective validation strategies. I also have experience with scripting, which helps streamline the migration process. Looking forward to your reply!
$38 USD in 40 days
0.0
0.0

Kedves Anita, Örömmel jelentkezem a Senior Adatmigrációs Szakértő pozícióra, mivel jelentős tapasztalattal rendelkezem komplex adatmigrációs projektek tervezésében és megvalósításában nagyvállalati környezetben. Teljes mértékben értem a feladatkör komplexitását: a forrás- és célrendszerek részletes feltérképezésétől kezdve az adatmodellezésen, mappingek kialakításán és transzformációs szabályok meghatározásán át a migrációs folyamatok implementálásáig, validációjáig és dokumentálásáig. Erős SQL tudással rendelkezem (PostgreSQL és MSSQL), rendszeresen dolgozom összetett lekérdezésekkel, transzformációkkal és optimalizálással. Pythonban, shell szkriptekben és ETL folyamatok fejlesztésében is jártas vagyok. Tapasztalataim között szerepel legacy adatbázisok modernizációja, nagyméretű adatkészletek migrációja, kontroll és adatminőségi mechanizmusok kialakítása, valamint rollback és cut-over stratégiák kidolgozása. Többször működtem együtt üzleti és IT stakeholderekkel, és rendszeresen készítek részletes technikai és mapping dokumentációt. Megbízhatóan átlátom a komplex adatfolyamatokat, gyorsan tanulok új rendszereket, és önállóan, strukturáltan végzem a munkám. Célom, hogy a migráció ne csak technikailag hibátlan, hanem üzletileg is értékes legyen. Szívesen beszélem át részletesen az elvárásokat és a projekt következő lépéseit! Üdvözlettel, Dragomir
$25 USD in 14 days
3.8
3.8

Hi there, I understand that your main challenge involves ensuring real-time notifications and accurate pricing updates between your apps and the admin panel. In my previous role, I successfully resolved notification issues for a ride-sharing platform, resulting in a 40% decrease in user complaints. Additionally, I implemented a pricing calculation feature that increased transparency for both drivers and admins, leading to a 25% boost in user satisfaction. To address your needs, I will troubleshoot the notification system to ensure timely updates during ride requests, arrivals, and cancellations. I will also enhance the pricing calculation feature to ensure accurate charges are displayed in real-time for both the admin panel and driver app, followed by publishing the application to the App Store and Play Store. I would be happy to discuss your needs and get started right away. Best regards, Artem
$37.50 USD in 40 days
0.0
0.0

Kedves Hirdető! (Dear Advertiser,) I am a Senior Data Migration Expert with extensive experience in end-to-end migration projects. I can help you map source-to-target systems, design robust data models, and execute complex transformations efficiently. My Expertise: 1. **ETL & Data Transformation**: Proficiency in modern ETL tools and custom scripting (Python/SQL) to handle large datasets with integrity. 2. **Database Management**: Deep knowledge of SQL (PostgreSQL, Oracle, MSSQL) for optimized data extraction and loading. 3. **Migration Strategy**: Proven track record in planning migration roadmaps, ensuring minimal downtime and zero data loss. I am ready to discuss the specific source/target systems and start immediately. Best regards,
$38 USD in 40 days
0.0
0.0

Hello. I am excited to submit my proposal for your complex data migration project. I have extensive experience in designing and executing end-to-end migration workflows, including legacy system analysis, data modeling, mapping, and transformation rule definition. I am proficient in SQL development for both PostgreSQL and MSSQL environments, with a strong focus on complex queries, optimization, and data validation. My background includes implementing ETL and batch/incremental processes, reconciliation mechanisms, and idempotent data loading strategies. I am also skilled in scripting with Python and shell/Bash to automate migration pipelines and data quality checks. I have collaborated closely with both business and IT stakeholders to ensure alignment and proper documentation of migration logic. I am confident in my ability to independently handle technical decisions such as rollback strategies, reprocessing, and cut-over planning. Joining your team, I aim to deliver high-quality, performant, and auditable migration solutions that meet your long-term enterprise requirements. Regards, Justin.
$38 USD in 40 days
0.0
0.0

With over 8 years of experience in software and data engineering, I believe I am the perfect candidate for your Adatmigrációs project. My expertise in database management, data modeling, SQL, and ETL implementations aligns perfectly with your requirements. Additionally, my familiarity with PostgreSQL and MSSQL will save time in comprehension and development. Having previously worked in Telekommunikációs environment including development and management of sprawling databases provide me the opportunity to leverage on my skillset. Irrespective of the programming languages you employ, my fluency in multiple scripting/programming languages including Python provides me an edge over the competition. Moreover, having worked with large-scale data volumes in earlier projects gives me an adept capability to tackle complex systems rapidly with a highly scalable approach as required by your project. Being a Senior Software Engineer (Ph.D.), not only can I bring domain expertise to the table but also sound decision-making capabilities. Working closely with both technical and business stakeholders has honed my communication skills into a 'translation' ability ensuring seamless understanding between groups. With my intention to seek long-term projects where I can make valuable contributions I completely align myself with your quest for a stable migration project offering real professional decision-making spaces.
$38 USD in 40 days
0.0
0.0

Hungary
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