03/07/2026 updated

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Senior Salesforce Developer

Warsaw, Poland
Worldwide
Warsaw University of Life Sciences, Informatics and Econometrics (Jul 2013)
Warsaw, Poland
Worldwide
Warsaw University of Life Sciences, Informatics and Econometrics (Jul 2013)

Profile attachments

Cezary Zeleznicki.pdf

About me

I am a results-driven Senior Salesforce Developer with 15+ years of IT experience. I enjoy challenging technical projects and thrive in dynamic environments focused on innovation and problem-solving. My career has given me a diverse skill set and strong expertise in Salesforce technologies.

HTMLJava (Programming Language)JavaScriptUnit TestingCascading Style Sheets (CSS)Cloud ComputingStatic Program AnalysisSoftware QualityDatabasesDatabase QueriesWeb DevelopmentCloud ServicesSalesforce.ComSimple Object Access Protocol (SOAP)Systems IntegrationTechnology IntegrationWeb ApplicationsApex CodeData ProcessingScriptingTestingReact.jsBackendGitSalesforce VisualforceSalesforce Object Query Language (SOQL)Front End Software DevelopmentProgramming Languages
Salesforce Development
Extensive experience in Salesforce technologies including Apex, Visualforce, Lightning, and various Salesforce Clouds. Proficient in enhancing platform performance and integrating external systems.
Web Development
Skilled in HTML, CSS, JavaScript, and React for front-end development. Experienced in creating responsive and dynamic web applications.
Integration
Proficient in integration technologies such as SOAP, REST.
Programming Languages
Proficient in Java and Python for backend development and scripting tasks.
Testing and Code Quality
Experienced in using Jest, Apex unit tests, Lint, and PMD for ensuring high code quality and performing static code analysis.
Database Technologies
Skilled in working with SOQL for Salesforce-specific database queries and data manipulation.
Cloud Platforms
Experience with various Salesforce Cloud platforms including Service Cloud, and Experience Cloud.

Languages

EnglishFluentPolishNative speaker

Project history

Senior Salesforce Developer

Led Revenue Cloud configuration and custom development, including custom pricing logic, qualification
workflows, and Apex Hooks.
Designed, improved, and implemented Apex, LWC,
and triggers for scalable, maintainable solutions.
Ensured adherence to Salesforce platform best practices, maintaining high performance and code quality
across environments.
Contributed to pre-sales activities, providing technical
expertise, solution design insights, and feasibility assessments for client proposals
Built bank integration for two banks to retrieve account details and transactions. Utilized SOAP and REST endpoints.


Senior Salesforce Developer / Technical Architect

Leaseplan
Enhanced Service Cloud platform performance, integrated external systems, contributed to COE team, conducted code reviews, and executed data migration using Talend.

Senior Salesforce Developer

BEC
Developed customer onboarding application with LWC components, ensured high code quality, and created automation scripts for org creation.

Senior Salesforce Developer

PwC
Configured Salesforce including validation rules and workflows, integrated with SAP via Dell Boomi, built mortgage application on Experience Cloud, and improved CI/CD process.

Salesforce Developer

Polsource
Built custom lightning components, created reusable address search components, and refactored Apex code to improve platform performance.

Salesforce Developer

Outbox
Developed custom solutions in Apex and Visualforce, improved data flow with client's external website, and refactored code to resolve SOQL limit issues.

Tier 1 Web Team Engineer

Citi International PLC
Supported internal users with in-house applications and improved support process by building Java applications for remote activities.

Mid-Office Specialist (AQUA Team)

CWT
Implemented scripts for quality checks and fulfillment of bookings for internal offices across Europe.

Self Booking Tool Agent

CWT
Administered and supported multiple self booking tools for external clients.

Certificates

Salesforce Certified Data Architect

Salesforce

2025

Salesforce Cert. Sharing & Visibility Architect

Salesforce

2025

Salesforce Certified Application Architect

Salesforce

2025

Salesforce Certified Administrator

Salesforce

2025

Salesforce Certified Data Cloud Consultant

Salesforce

2025

Salesforce Certified AI Associate

Salesforce

2025

Salesforce Certified AI Specialist

Salesforce

2025

Salesforce Certified Integration Architect

Salesforce

2020

Salesforce Certified App Builder

Salesforce

2019

Salesforce Certified Platform Developer II

Salesforce

2017

Salesforce Certified Platform Developer I

Salesforce

2016


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