SŚLooking for a job
Sebastian Ślepowroński
@sebastian_slepowronski
Senior Full-Stack Engineer and the proud creator of the Matador and Lunet iOS apps | ex-Kraken
PolandWhat I'm looking for
I'm a Senior Full-Stack Engineer with 10+ years of professional experience paying careful attention to UX/UI and product development, which are as important as the tech stack of the application. I spend my coding time mainly in the TypeScript & React environments nowadays. I admit to being a huge fan of functional & reactive programming and a static typing believer. However, I'm open to and curious about all aspects of software engineering. Because of that, I've been doing full-stack and mobile (native iOS with Swift and iOS/Android with React Native) development as well.
I'm always eager to gain fresh knowledge and discover new exciting technologies unexperienced by me before.
At Kraken, I've architected and developed fundamental parts of the undisclosed system.
As a Senior Software Engineer II (Frontend) at Sumo Logic, I've improved and enhanced many skills across the whole spectrum: starting with UX, through the architecture, to the application performance analysis. It was the system processing a massive amount of data. Developing it required cooperation with diverse teams located in various time zones daily.
While working as a Senior Software Engineer (Full-Stack) in the fast-paced NavVis startup (21st employee in the company, and 3rd developer in the team), I've shaped the tech stack, good coding practices, work methodology, and interview processes. I've been developing the IVION software bringing 3D indoor spaces to the web browsers. It allowed me to experience all the aspects of full-stack development, resolve problems in different industries, use modern technologies, and cooperate with one of the biggest companies in the world.
Being the proud creator of the Lunet iOS app (http://lunetapp.com) allowed me to design and implement the brand-new native mobile Swift app on my own. I could go through all the steps of product development, starting with an idea and ending with the completed native app released on the App Store.
The Matador app was a great opportunity to architect and implement the universal app working on iOS / Android / Web. I took care of all the parts of this big piece of software: frontend, backend, database, and infra. The whole system is deployed to Google Cloud as a SaaS application.
All mentioned projects were demanding and rewarding at the same time.
Exactly the type of challenge I'm looking for.
Experience
MA
Current
Co-Founder
Matador
May 2020 - Present (3 years 11 months)
• Built an entirely new universal app from scratch (shared codebase working in multiple environments - iOS / Android / Web)
• Prepared the whole UX/UI design, software architecture, implementation, and tests
• Deployed the app to Google Cloud (App Engine / Compute Engine)
• Deployed the CouchDB database cluster and connected with it using GraphQL
NACurrent
Senior Software Engineer (Full-Stack)
NavVis
Nov 2018 - Present (5 years 6 months)
• Designed and implemented REST API for the greenfield facility management project
• Created plugins for several external facility management systems (CMMS) and connected them to the generic REST API service
• Prepared easy-to-use REST documentation used by the API consumers (mobile SDKs and web)
SLSenior Software Engineer II (Frontend)
Sumo Logic
Feb 2021 - May 2022 (1 year 3 months)
• Led the team of 3 frontend engineers, successfully implemented and released the Reliability Management (SLOs/SLIs) project
• Built the foundation technology allowing to create the customizable SLO dashboards
• Designed REST API in cooperation with the backend team
• Synchronized requirements and design between the frontend team and product/UX/QA/backend teams across several time zones
KR• Architected and developed fundamental parts of the undisclosed system
• Core engineer of the team
NAAdvanced Software Engineer (Full-Stack)
NavVis
May 2015 - Nov 2018 (3 years 6 months)
• 21st employee in the company, and 3rd developer in the IVION team: shaped the tech stack, good coding practices, work methodology, and interview process
• Designed and implemented user management and authentication system based on the permission groups tree
• Envisioned and made responsive UI for the whole app
• Introduced TypeScript to the project and migrated existing JavaScript codebase
LUFounder
Lunet
May 2016 - Sep 2018 (2 years 4 months)
• Built an entirely new Swift app from scratch and successfully released it on the App Store
• Prepared the whole UX/UI design, software architecture, implementation, release notes, and marketing materials
• Integrated web API endpoints from external service and data providers (The Movie Database, Firebase)
• Covered a codebase with the unit / integration / E2E tests using Quick / Nimble
SLSenior Software Engineer I (Frontend)
Sumo Logic
Nov 2018 - Feb 2021 (2 years 3 months)
• Conceptualized and implemented autocomplete based on the Abstract Syntax Tree representing the language grammar with ANTLR and CodeMirror, greatly increasing the efficiency of advanced users typing in the custom Sumo query language
• Handled a tremendous amount of data coming from the backend
• Designed and developed new feature pages from scratch (Metrics Explorer, Fields, etc.)
Tech stack
Learn about the tools and technologies that Sebastian likes to use.
Availability
Looking for a job
Location
PolandAuthorized to work in
Website
www.sebastiancrow.comSocial media
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