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Joanna Szefer Email & Phone Number

Software Engineer | Typescript | React | Node.js at Salesloft
Location: Wrocław, Dolnośląskie, Poland 5 work roles 1 school
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✓ Verified May 2026 3 data sources Profile completeness 86%

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Current company
Role
Software Engineer | Typescript | React | Node.js
Location
Wrocław, Dolnośląskie, Poland
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Who is Joanna Szefer? Overview

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Quick answer

Joanna Szefer is listed as Software Engineer | Typescript | React | Node.js at Salesloft, a company with 486 employees, based in Wrocław, Dolnośląskie, Poland. AeroLeads shows a matched LinkedIn profile for Joanna Szefer.

Joanna Szefer previously worked as Software Engineer at Salesloft and Software Developer at Nokia. Joanna Szefer holds Bachelor'S Degree, Genetyka I Biologia Eksperymentalna from Uniwersytet Wrocławski.

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Salesloft

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Profile bio

About Joanna Szefer

Joanna Szefer is a Software Engineer | Typescript | React | Node.js at Salesloft. They is proficient in angielski.

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Joanna Szefer's current company

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Salesloft
Salesloft
Software Engineer | Typescript | React | Node.js
atlanta, georgia, united states
Website
Employees
486
AeroLeads page
5 roles

Joanna Szefer work experience

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Software Engineer

Current
Aug 2024 - Present

Software Developer

Wrocław, Woj. Dolnośląskie, Polska

  • Developed a web data dashboard for KPI and problem reports visualisation, which allowed fault coordinators to speed up the problem reporting process.
  • Implemented interactive React charts and integrated them with multiple backend services, whichprovided a seamless user experience by consolidating data and features from distributed endpoints into a single cohesive.
  • Designed and coded a TypeScript React app using the AntDesign framework and styled-components.
  • Built and… Show more
  • Built and maintained back-end NodeJS and Express.js services exposing RESTful APIs to query for data stored in MongoDB instances with schema designed for optimized operations.
  • Tested the app (UT/component) using Jest and React Testing Library.
Jun 2022 - Feb 2024

Working Student

Wrocław, Woj. Dolnośląskie, Polska

  • Created a web application used for product logs visualisation.
  • The service was generating sequence diagrams based on log files provided by a user, which allowed to analyse the data in a comprehensible manner.
  • The processed data was saved in a MongoDB database along with a link to share parsing results.
  • Tested the app (UT/component) using Jest and React Testing Library
Oct 2021 - May 2022

Summer Trainee

Wrocław, Woj. Dolnośląskie, Polska

  • Designed a department management tool, which allowed team assistants to automate employee onboarding and exit processes.
  • Implemented a TypeScript React app using MUI framework and Redux-toolkit state management in a mobile-first approach.
  • Integrated with a teams’ indexing service and Microsoft Graph API service to fetch and update employee details based on their roles and group memberships.
  • Developed a NodeJS service for saving employees data in a MongoDB instance.
  • Tested… Show more
  • Tested the app with Jest. Generated code coverage reports to ensure a thorough codebase validation with automatic threshold checks. Show less
Jul 2021 - Sep 2021

Frontend Developer Intern

Wrocław, Woj. Dolnośląskie, Polska

  • Built a Magento frontend component of an e-commerce store based on provided design mock-ups.
  • The project required a pixelperfect approach to fully reflect the design and to keep UI/UX functionality intact.
Mar 2021 - Jun 2021
Team & coworkers

Colleagues at Salesloft

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1 education record

Joanna Szefer education

FAQ

Frequently asked questions about Joanna Szefer

Quick answers generated from the profile data available on this page.

What company does Joanna Szefer work for?

Joanna Szefer works for Salesloft.

What is Joanna Szefer's role at Salesloft?

Joanna Szefer is listed as Software Engineer | Typescript | React | Node.js at Salesloft.

Where is Joanna Szefer based?

Joanna Szefer is based in Wrocław, Dolnośląskie, Poland while working with Salesloft.

What companies has Joanna Szefer worked for?

Joanna Szefer has worked for Salesloft, Nokia, and Virtua.

Who are Joanna Szefer's colleagues at Salesloft?

Joanna Szefer's colleagues at Salesloft include Julian Harding, Yovanha Alitzel Fajardo Borjas, Patrick Kennelly, James Shan, and Michelle An.

How can I contact Joanna Szefer?

You can use AeroLeads to view verified contact signals for Joanna Szefer at Salesloft, including work email, phone, and LinkedIn data when available.

What schools did Joanna Szefer attend?

Joanna Szefer holds Bachelor'S Degree, Genetyka I Biologia Eksperymentalna from Uniwersytet Wrocławski.

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