
Posted 76 months ago
Hackers wanted – Senior Software Engineer
LisbonHybridFull-time
AI Summary
A Senior Software Engineer designs, develops, tests, deploys, and maintains large-scale software platforms as part of small cross-functional teams, collaborating closely with customers to iterate and improve product offerings.
About this role
ABOUT OUR COMPANY
We are an engineering organization. Our mission is to “Ship great software” and build custom, large-scale software platforms on time, on budget and on target.
In over two decades, we have never failed to deliver what we promised.
85% of our members are software engineers with a background in computer science, physics or mathematics, many also with a strong background in machine learning.
freiheit.com technologies was founded in Hamburg in the midst of the first internet boom in the last millennium in 1999. Since then, we’ve been building custom software platforms and helping our clients to create their future business models based on software.
For over a quarter of a century, we have been working for the "Who's Who" of German and European industrial and commercial companies. Retail, automotive, e-commerce, healthcare and more.
Our large-scale software platforms are used by millions of users every day. Each product has a business-critical, strategic relevance for our customers.
We have a team of 250+ employees from 30+ nations in our engineering hubs in Hamburg and Lisbon.
We make “mission impossible” possible and very often create things that no one has ever built before.
Our teams work data-driven to constantly optimize their own productivity by removing friction from their work. Each member takes on end-to-end responsibility for their work. To be successful, you need to be productive. To be productive, you need to be efficient and effective.
Technology never rests. Neither do we.
ABOUT YOUR JOB
· You start in one of our engineering teams. Team size is maximum five people.
· You will receive a lot of introductory training in the first weeks about the technologies you are going to use in your project.
· The trainings are conducted by software engineers from our own company.
· You are involved in every part of the software engineering process and in the lifecycle of the services that your team is building -
design, development, testing, deployment, maintenance, operations and improving software based on user feedback and usage
data.
· You work closely with our customers to iteratively improve their product offering by conceiving, refining and delivering new ideas.
ABOUT YOU
Qualifications:
· Bachelor’s degree in Computer Science or related fields like Mathematics or Physics
· Experience in C/C++, Python or Java
· Ability to learn fast
· Algorithms and data structures, understanding time & space complexity
· 5+ years of experience as a software engineer (writing code every day)
· Worked in teams of at least five members
· Delivered 2-3 projects from first line of code to production launch
· Stayed on at least 1-2 years in each team/project
· High influence on the technical success of their past projects
Bonus skills or interests:
· Master or PhD in Computer Science or related fields like Mathematics or Physics
· Experience in Go, Kotlin, TypeScript or JavaScript
· Experience in front end development, like ReactJS, Angular, Vue or Flutter/Dart
· Functional programming with Common Lisp, Clojure or Haskell
· Experience working with distributed systems in the Cloud
· Experience in Machine Learning and Data Science
· Competitive Programming
Skills
AngularC++ClojureCommon LispCompetitive ProgrammingDartDistributed SystemsFlutterGOHaskellJavaJavaScriptKotlinMachine LearningPythonReact.jsTypeScriptVue
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All reports →- Role reportSoftware engineer jobs, Sep 2026: new listings down 9.7%New software engineer listings fell 9.7% to 1,506 this week, the first weekly drop in a month. Prioritize applications while 1,506 fresh roles remain open.
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- Market overviewState of tech hiring, September 2026: up 4.8%Tech hiring rose 4.8% month over month in September 2026, with 411,122 new listings. Customer support and account executive roles led the growth.