Sebastian Fuentes

Senior Frontend Dev / Consultant

Berlin, Germany

Experience

Dec 2024 - Present
7 months

Senior Frontend Dev / Consultant

Bettermarks.de

  • Developing and maintaining current modules
  • Asserting the current state of the architecture and implementation
  • Providing guidance for future development
  • Mentoring team members
  • Developing a standard blueprint library for others to follow

Technologies:

  • React
  • Redux
  • Jest
  • Kotlin
Oct 2021 - Dec 2021
3 months

Project Owner - Interim

WMF

  • Overseeing the B2B online shop of WMF
  • Stakeholder and vendor management
  • Technical planning and roadmap development
Dec 2020 - Nov 2024
4 years

Frontend Lead / Architect / Consultant

WMF / GroupeSEB

  • One-stop contact between the customer, external vendors, internal IT organization, and business team
  • Consulting the customer directly without vendor affiliation
  • Migrating the front-end team from external vendor to in-house team in France due to organizational changes, involving hiring, mentoring, and team management
  • Project steering in agile methodologies and software design
  • Member of the program management group

Project scope:

  • Re-implementation of an IoT platform (Coffeesmart)
  • Overseeing cross-team communication
  • Go-to person for all topics concerning frontend
  • Code quality oversight and mentoring
  • Development process design for backend and frontend
  • Interfacing between business and technical stakeholders
  • Setting up a performance/API testing solution
  • Hiring and team transition
  • Scrum and agile consulting

Technologies:

  • VUE
  • Webpack
  • ES6 / TS
  • Azure
Aug 2020 - Dec 2020
5 months

Senior Frontend Developer / Architect

eHealth-Tec

  • Development of several user interfaces for electronic prescriptions

Technologies:

  • React.js
  • Redux
  • Webpack
  • ES6 / TS
Jan 2020 - Apr 2020
4 months

Interim Frontend Lead / Architect

Travelcircus.de

  • Setting up a new front-end team, including interviews and CV screening
  • Evaluating the existing codebase
  • Creating a migration concept
  • Developing a draft for the user self-service portal
  • Team coaching and mentoring
  • Consultation support regarding agile processes
  • Acting as the communication interface between CTO and project management

Technologies:

  • React.js
  • Redux
  • Webpack
  • ES6
Aug 2019 - Jan 2020
6 months

Consultant / Architect / Senior Frontend Developer

Ideal Versicherung

  • Creating a frontend architecture and software design for a self-service portal
  • Planning scope and conceptual work
  • Implementing the created architecture
  • Mentoring and training existing team members in React and modern JavaScript

Technologies:

  • React.js
  • Redux
  • Webpack
  • ES6
  • Victory Charts
Apr 2019 - Jul 2019
4 months

Senior Frontend Developer / Architect

Neofonie

  • Re-implementation of a B2B service application for the travel/sourcing market
  • Planning scope and conceptual work
  • Ramp-up phase requiring maintainability-focused implementation
  • Enterprise-grade code quality
  • Constant communication with HRS enterprise architect

Technologies:

  • React.js
  • Redux
  • Webpack
  • ES6
  • API/interface testing
  • Mock data generation
Jun 2018 - Mar 2019
10 months

Senior Frontend Developer / Frontend Architect / Team Captain

HRS Innovation Hub

  • Migrating the hotel.de application to a new tech stack
  • Planning scope and conceptual work
  • Mentoring and hiring
  • Leading the team
  • Acting as the communication interface between tech leadership, dev teams, and product team

Technologies:

  • React.js
  • Redux
  • GraphQL
  • Webpack
  • ES6
  • Node.js
Mar 2017 - Jun 2018
1 year 4 months

Senior Frontend Developer / Frontend Architect

Adidas

  • Re-implementation of the B2B order intake system "Click"
  • Conception and implementation of SPA architecture
  • Concept and implementation of base components and backend services
  • Mentoring and reviewing new team members
  • Mentoring and reviewing five teams involved in frontend development

Technologies:

  • React.js
  • Redux
  • Webpack
  • ES6
  • API Design
  • OpenAPI/BluePrint
Nov 2016 - Feb 2017
4 months

Senior Frontend Developer / Frontend Architect

Bettermarks

  • Developing concept and architecture for a tech stack migration from "Action Script/Flash" to React
  • Implementing the prototype
  • Training and mentoring the team
  • Implementing an MVP
  • Creating a concept for next steps
  • Evaluating different libraries

Technologies:

  • React.js
  • Redux
  • Webpack
  • PouchDB
  • ES6
  • Canvas, SVG
Oct 2015 - Sep 2016
1 year

Product Owner - Clients

Immmr

  • Product development
  • Steering client development projects
  • Leading four client development teams (20 people)
  • Overall project steering
  • Developing business requirements
  • Acting as the communication interface for CTO/CPO and development teams
  • Mentoring
Feb 2015 - Aug 2015
7 months

Senior Frontend Developer

Immmr

  • Developing a WebRTC-based offline-first communication web client

Technologies:

  • React.js
  • CouchDB / PouchDB
  • Webpack
  • ES6
Oct 2014 - Dec 2015
3 months

Senior Frontend Developer

Moccu

Jun 2014 - Oct 2014
5 months

Senior Frontend Developer

Triad

May 2014 - Jun 2014
2 months

Senior Frontend Developer

Actano

May 2013 - Apr 2014
1 year

Senior Frontend Developer

Deutsche Post e-Post

Oct 2012 - Apr 2013
7 months

Senior Frontend Developer

Telekom Innovation Labs | Appzonaut

Dec 2011 - Mar 2012
4 months

Senior Frontend Developer

FP Commerce / Home24.de

Mar 2011 - Aug 2012
1 year 6 months

Senior Frontend Developer

DDB Tribal Berlin

Nov 2010 - Nov 2011
1 year 1 month

Lead Developer / Senior Web Developer

AKQA

Projects:

  • Lead Developer | China Maps Nokia
  • Senior Web Developer | Volkswagen Car Configurator
Jul 2010 - Oct 2010
4 months

Team Lead | Integration Platform

BigPoint

Feb 2010 - May 2010
4 months

Senior Web Developer

AKQA

Project:

  • Nokia Maps
Jan 2005 - Dec 2008
2 years

WebMaster

Yachthafen Residenz "Hohe Düne"

Jan 2004 - Dec 2005
1 year

Web Developer / Webmaster

IP Knowledge

Jan 2004 - Dec 2004
1 year

Web Developer

Knowledge Solutions

Jan 2003 - Dec 2004
1 year

Team Lead Web Developer

Platinum Visions

Jul 1999 - Oct 2001
2 years 4 months

Web Developer

Nets AG

Oct 1998 - Mar 1999
6 months

Web Developer

Amazon.de

Summary

I primarily support customers in implementing software development processes while simultaneously developing products, including tech stack migrations, team building, mentoring, and the development of suitable sustainable architectures, which are the basis of my work.

For most clients, architecture, agile process methodologies, and team management are not limited to the front end, as the required trades are often comprehensive. This also includes data protection, data design, and security concepts.

My customers and I do not see me as a pure workbench but as someone who helps a customer develop software beyond the time of the commitment that is maintainable and understandable and remains manageable along its life cycle. For me, clean code, testing, process methodologies, code style, and the many other components of the rapidly changing software ecosystem are a means to and not an end in themselves to achieve this goal.

I usually get involved in project management & steering questions such as team composition and milestone planning to bring in my long project experience.

Languages

German
Native
English
Advanced