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Kevin Liebholz Senior Software Engineer | Aspiring Tech Lead
Profile

Senior Full-Stack Software Engineer ready to lead. I bring 5+ years of experience in startups leading complex projects, coach team members, and advocating for sustainable, scalable systems. My startup experience taught me to move fast and learn rapidly, while my business background helps to align technical solutions with real-world needs. I thrive at the intersection of product, technology, and team. I'm motivated by sustainability, enabling others and I'm ready to step into a formal tech leadership role to help teams deliver exceptional software.

Core competencies include Full-Stack Development, CI/CD, Test-Driven Development, Software Architecture, Developer Enablement, Platform Reliability, Secure & Scalable Infrastructure, Feature Scoping, Product Development, Project Management, Mentoring, Onboarding, Process Development, Stakeholder Collaboration, and Team Leadership.

Highlights
Led a team of 5 engineers and designers to develop a compliant advisory solution securing €300,000 in R&D funding
Led teams of 3+ engineers for complex payment and SSO integrations collaborating with product & legal
Founded internal Book Club & structured knowledge sharing to foster learning culture and raise engineering quality
Mentored junior developers through FirstRubyFriend and structured internal onboarding
Spoke at RailsConf 2023 and local meetups promoting team visibility and technical excellence
Skills
Leadership: Technical Leadership, Cross-functional Collaboration, Team Enablement, Mentorship, Project Planning
Database: PostgresSQL, MySQL, Redis
Infrastructure: Docker, Heroku, AWS, NGINX, GitHub Actions
Frameworks & Languages: Ruby on Rails, Ruby, JavaScript, TypeScript, Python, React, Flutter
Testing & Monitoring: RSpec, Capybara, Cypress, Jest, Scout APM, Elastic, Grafana
Other: Bootstrap, Tailwind, Sidekiq, Hotwire, Stimulus, git
Professional Experience
Dec 2023 – presentDarmstadt, Germany | Hybrid
Senior Backend Developer, IoT Venture GmbH

Senior Backend Developer with a focus on developing and enhancing the central data link platform for a leading manufacturer of data signatures and GPS trackers.

Additional responsibilities include participating in emergency standby on-call duties, facilitating team retrospectives, conducting internal technical talks and feature presentations, representing the brand as part of the Corporate Influencer Team, and serving as a first aider, fire protection, and evacuation assistant.

Achievements

  • •Leading a team of 3+ engineers to elevate business model flexibility through integrating a new payment provider (mollie), aligning engineering, product, and legal to ensure a compliant, scalable implementation
  • •Drove concept and stakeholder alignment for an OAuth/SSO integration with a key customer
  • •Increased manufacturing speed by upgrading the manufacturing platform
  • •Improved tracker functionality by augmenting data insights and updating the communication protocol
  • •Supported a strategic carrier transition by providing complex data insights to management
  • •Ramped up testing from around 10% to around 90% with the team elevating the product quality and reliability
  • •Promoted cross-team knowledge by founding a Backend Book Club
  • •Promoted technology careers to young students during Girls Day
    • Kevin Liebholz
    May 2020 – Nov 2023Frankfurt, Germany | Hybrid
    Software Engineer, portagon GmbH

    Full Stack Software Engineer for a white-label SaaS platform specializing in the digital distribution of financial products.

    Additional responsibilities include being an onboarding mentor and guiding junior staff, facilitating team retrospectives, conducting internal technical talks and feature presentations, shaping company culture by participating in the motivation team, and serving as a first aider, fire protection, and evacuation assistant.

    Achievements

  • •Leading a team of 5+ engineers and designers for the development of a compliant video-based financial advisory solution, which secured €300.000 in R&D funding, and coordinating product and legal input
  • •Solved a longstanding bug through persistent audit and review, improving system reliability
  • •Integrating a liability umbrella for high-volume investment processing
  • •Designed and built a compliant internal invoicing tool, streamlining financial operations
  • •Enhanced deployment reliability and speed CI/CD workflows on GitHub Actions and Heroku Pipelines
  • •Designed and implemented a team onboarding program and mentorship tracks to accelerate new hire integration and team growth from 3 to 12 engineers
  • •Raised in-house product awareness by introducing & leading knowledge transfer and business-wide feature reviews
  • •Ramped up testing from near 0% to around 80% with the team elevating product quality and reliability
    • Feb 2014 – presentKarlsruhe, Germany | Remote
    Co-Owner & CTO, eFairSorger GbR (sidebusiness)

    Face-to-face consultancy for optimizing consumer electricity tariffs.

    Previous Experience
    Aug 2018 – Oct 2019Ulm, Germany
    CFO, EquilTec GmbH
    Jun 2018 – Dec 2018Tuebingen, Germany
    Education
    2019Barcelona, Spain
    Le Wagon Batch #341, Coding Bootcamp
  • •9-week coding Bootcamp
    • 2014 – 2018Tuebingen, Germany
    Eberhard-Karls-University Tuebingen, B. Sc. Economics & Business Administration
  • •Thesies: "How can Narcissists Be Motivated to Contribute to Collective Action?"
    • 2016Rohnert Park, CA, USA
    Sonoma State University, Semester abroad
    Impact
    Mentorship

    Mentor junior devs via FirstRubyFriend and internal onboarding, fostering confidence and clean code practices.

    interest_days gem, Open Source

    This gem provides the interest day factor calculation based on ISDA conventions.

    Languages
    German
    English
    Spanish
    Talks
    Going Native: Turbo Native & Strada

    Frankfurt Ruby Meetup, April 2024

    Hotwire: Applied Turbo 8

    Frankfurt Ruby Meetup, January 2024

    Speaker at RailsConf 2023 Atlanta

    Exploring the Power of Turbo Streams & ActionCable

    Advanced Turbo Stream - NOT a Chat

    Franfurt Ruby Meetup, January 2023

    Interests
    My cats|Surfing|Dancing (HipHop)
    Kevin Liebholz