Sergey Korolev
Senior Software Engineer
Experience
Senior Software Engineer
TJC UK & Ireland
- Initiated fundamental changes in the company’s development workflow, including usage of version management system and a cloud-based DevOps management framework (Azure DevOps)
- Actively participated in the development team hiring and mentored core development team members
- Selected the technology base of the company’s product: Cloud Foundry (SAP BTP) as a cloud management runtime and NodeJS as a backend framework
- Developed the core functionality of the company’s product as a sole developer: a cloud-based application using microservice architecture with a modern UI based on the OpenUI5 framework
- Developed supporting packages and components, including a unified DB interface for NodeJS, a robust event driven job scheduling server and client, and a number of custom controls for the OpenUI5 framework
SAPUI5/Fiori/ABAP Developer
Litasco SA
- Developed SAPUI5 and Fiori applications
- Extended standard Fiori applications
- Designed and implemented OData services using SAP Gateway
ABAP Developer
Remedyne GmbH
- Developed custom reports in FI, MM, and SD for a proprietary software product
ABAP Developer
X5/Unitera
- Developed a custom application for FI and SD: intercompany reporting and postings for VAT optimization in one of the biggest retail companies in the country
- Designed end-to-end custom application with its own configuration tables and workplaces based on updatable ALV
- Developed multiple reports processing tens of millions of records quarterly
- Completed development, including unit testing, in three weeks
ABAP/PI/Workflow Developer, Development Team Lead
CRH Europe/Deloitte
- Designed and developed a complex set of real-time SAP PI interfaces with third-party systems using Idoc, JDBC, and proxy-based protocols with BPM functionality
- Designed and developed custom workflows in SAP Procurement and Finance
- Provided pre go-live and post go-live support and troubleshooting for existing workflow templates
- Coordinated the development team and mentored developers
- Supported custom developments and interfaces, including PI and OpenText VIM workflow templates
- Achieved on-time and on-budget project delivery despite lack of prior SAP PI and OpenText VIM experience through rapid self-learning and adaptation
ABAP Developer
PepsiCo
- Developed technical solutions for a new implementation of Sales and Distribution, including BADIs, user exits, and custom reports for FI, MM, and SD
ABAP/Workflow/PI Contractor
Freelance
- Designed and implemented complex SAP/PI interfaces
- Designed and implemented complex UIs using SAPUI5 and Fiori frameworks
- Designed and implemented technical SAP ABAP and Workflow solutions
- Designed and developed SAP custom applications
- Provided technical consultancy and advisory services
- Delivered business process improvements
- Proved a first-class contractor, delivering quality ABAP, Workflow, and PI consultancy services to blue-chip clients
- Gained a reputation as a highly knowledgeable SAP expert with in-depth business and technical acumen
- Forged excellent relations with major clients, securing contract proposals from return customers
- Designed and implemented a complex set of real-time SAP PI interfaces based on various protocols
- Fine-tuned and optimized business-critical BI applications on short notice under high pressure
- Identified end user requirements and implemented significant changes, ensuring timely project delivery
- Improved business-critical corporate reports for FI/CO, MM, and SD modules
- Trained junior staff, transferring knowledge and reducing external training costs
- Led teams and mentored junior developers, consistently achieving and surpassing project goals
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (19 years), Energy (10 years), Retail (8 years), Construction (0.5 years), Professional Services (0.5 years), and Food and Beverage (0.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (19 years), Business Intelligence (12 years), Finance (11 years), Procurement (10.5 years), Sales (10 years), and Product Development (8 years).
Summary
A dedicated, versatile, and highly motivated full-stack developer within NodeJS, SAP Business Technology Platform, SAPUI5, and Cloud Foundry with a proven track record of developing and delivering effective IT solutions that exceed client expectations and business objectives.
Highly detail-oriented and an analytical problem solver with efficient troubleshooting skills.
Strong interpersonal and communication skills build positive working relationships with end users, team members, and stakeholders at all levels. Thrives under pressure, is SAP-certified with extensive technical knowledge and is quick to grasp new technologies.
Skills
Javascript
Nodejs
Mysql
Postgresql
Hana Db
Sapui5
Sap Cloud Platform
Cloud Foundry
Sap Pi
Abap
Bapi
Badi
Xml
Nodejs
Cloud Foundry
Sap Process Integration (Pi): System Landscape Configuration, Esr, Ib, Jdbc, Ftp, Proxy, Integration Tools (Idoc, Edi, Xml, Rfc, Webservices)
Abap: Report Programming (Alv And Oo Alv), Dialogue Programming (Including Custom Controls), Object Oriented Abap (Abap Objects)
Workflow: Business Workflow Design And Development, Bor (Business Object Repository), Workflow-enabled Abap Classes
In-depth Technical Knowledge Of Sap Modules Including Mm, Sd, Fi, Co, Pm, Ps, Hcm
Extensive Senior Level Sap Experience
Highly Versatile Across Many Technical Functions
Strong Troubleshooting Prowess
Excellent Interpersonal And Communication Skills
Calm And Assured In Pressurised Situations
Ability To Engage At All Levels & Across All Cultures
Pride In The Provision Of High Standards Of Service
Strategic, Creative And Lateral Thinker
Professionalism And Integrity At All Times
Languages
Education
Moscow State University
BSc in Applied Mathematics · Applied Mathematics · Moscow, Russian Federation
Certifications & licenses
Certified SAP ABAP Developer
Certified SAP PI Developer
Certified SAP Workflow Developer
Profile
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