Sergey Korolev - Senior Software Engineer

Q: Where is Sergey based?

Sergey is based in Walnut Tree, United Kingdom and can operate in on-site , hybrid , and remote work models.

Q: What languages does Sergey speak?

Sergey speaks the following languages: Russian (Native), English (Advanced), French (Elementary) .

Q: How many years of experience does Sergey have?

Sergey has at least 19 years of experience. During this time, Sergey has worked in at least 5 different roles and for 7 different companies . The average length of individual experience is 3 years and 9 months . Note that Sergey may not have shared all experience and actually has more experience.

Q: What is Sergey's latest experience?

Sergey's most recent position is Senior Software Engineer at TJC UK & Ireland .

Q: What companies has Sergey worked for in recent years?

In recent years, Sergey has worked for TJC UK & Ireland , Litasco SA , and Remedyne GmbH .

Q: Which industries is Sergey most experienced in?

Sergey is most experienced in industries like Information Technology , Energy , and Retail . Sergey also has some experience in Construction , Professional Services , and Food and Beverage .

Q: Which business areas is Sergey most experienced in?

Sergey is most experienced in business areas like Information Technology , Business Intelligence , and Finance . Sergey also has some experience in Procurement , Sales , and Product Development .

Q: Which industries has Sergey worked in recently?

Sergey has recently worked in industries like Information Technology , Energy , and Retail .

Q: Which business areas has Sergey worked in recently?

Sergey has recently worked in business areas like Finance , Procurement , and Sales .

Recommended expert

Walnut Tree, United Kingdom

Experience

Jan 2018 - Present

8 years 3 months

United Kingdom

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

Apr 2016 - Present

10 years

Switzerland

SAPUI5/Fiori/ABAP Developer

Litasco SA

Developed SAPUI5 and Fiori applications
Extended standard Fiori applications
Designed and implemented OData services using SAP Gateway

Dec 2015 - Present

10 years 4 months

Germany

ABAP Developer

Remedyne GmbH

Developed custom reports in FI, MM, and SD for a proprietary software product

Aug 2015 - Sep 2015

2 months

Russian Federation

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

Oct 2014 - Apr 2015

7 months

Ukraine

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

Oct 2014 - Apr 2015

7 months

Russian Federation

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

Jan 2007 - Dec 2018

12 years

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

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Energy, Retail, Construction, Professional Services, and Food and Beverage.

Information Technology

Energy

Retail

Construction

Professional Services

Food and Beverage

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Business Intelligence, Finance, Procurement, Sales, and Product Development.

Information Technology

Business Intelligence

Finance

Procurement

Sales

Product Development

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

Russian

Native

English

Advanced

French

Elementary

Education

Oct 1980 - Jun 1984

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

Statistics

Experience

Total positions 7

Experience in Information Technology 19 y

Avg length 5 y 11 m

Longest experience 11 y 11 m

Global Experience

Countries worked in 5 (Russian Federation, United Kingdom, Switzerland, Germany, Ukraine)

Primary country Russian Federation

Expertise

Recent roles Senior Software Engineer, SAPUI5/Fiori/ABAP Developer, ABAP Developer

Main industries Information Technology, Energy, Retail

Main business areas Information Technology, Business Intelligence, Finance

Qualifications

Highest degree Bachelor

Certifications earned 3

Profile

Created

February 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Sergey based?

Sergey is based in Walnut Tree, United Kingdom and can operate in on-site, hybrid, and remote work models.

What languages does Sergey speak?

Sergey speaks the following languages: Russian (Native), English (Advanced), French (Elementary).

How many years of experience does Sergey have?

Sergey has at least 19 years of experience. During this time, Sergey has worked in at least 5 different roles and for 7 different companies. The average length of individual experience is 3 years and 9 months. Note that Sergey may not have shared all experience and actually has more experience.

What roles would Sergey be best suited for?

Based on recent experience, Sergey would be well-suited for roles such as: Senior Software Engineer, SAPUI5/Fiori/ABAP Developer, ABAP Developer.

What is Sergey's latest experience?

Sergey's most recent position is Senior Software Engineer at TJC UK & Ireland.

What companies has Sergey worked for in recent years?

In recent years, Sergey has worked for TJC UK & Ireland, Litasco SA, and Remedyne GmbH.

Which industries is Sergey most experienced in?

Sergey is most experienced in industries like Information Technology, Energy, and Retail. Sergey also has some experience in Construction, Professional Services, and Food and Beverage.

Which business areas is Sergey most experienced in?

Sergey is most experienced in business areas like Information Technology, Business Intelligence, and Finance. Sergey also has some experience in Procurement, Sales, and Product Development.

Which industries has Sergey worked in recently?

Sergey has recently worked in industries like Information Technology, Energy, and Retail.

Which business areas has Sergey worked in recently?

Sergey has recently worked in business areas like Finance, Procurement, and Sales.

What is Sergey's education?

Sergey holds a Bachelor in Applied Mathematics from Moscow State University.

Does Sergey have any certificates?

Sergey has 3 certificates. These include: Certified SAP ABAP Developer, Certified SAP PI Developer, and Certified SAP Workflow Developer.

What is the availability of Sergey?

Sergey will be available full-time from April 2026.

What is the rate of Sergey?

Sergey's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.