Senior Backend Developer responsible for backend services and API design for the Gaia web application. Collaborating with frontend teams in an agile environment at ING Hubs Poland.
About the role
- Backend Engineer developing robust backend systems for an AI-first software company. Collaborating with diverse teams to enhance AI capabilities and improve infrastructure performance.
Responsibilities
- Develop and maintain backend features and APIs for our core platform
- Improve database performance, reliability and real-time data processing
- Debug, profile and optimise code to keep latency low and systems stable
- Collaborate with AI, frontend and product teams to integrate new capabilities
- Contribute to architectural decisions and shape the evolution of our backend stack
Requirements
- 3–5 years’ experience building production-grade backends (Python preferred; Go, C++, or Java also valuable)
- Solid in SQL and data modelling (PostgreSQL or similar)
- Experienced with REST APIs and cloud environments (AWS preferred)
- Comfortable working independently and taking ownership of a problem
- Startup mindset — quick to ship, focused on quality, allergic to bureaucracy
- Nice to have: Linux debugging and performance tuning, Familiarity with orchestration (Kubernetes, Terraform, Ansible), Experience with data pipelines or analytical databases, Interest in edge/cloud hybrid architectures
Benefits
- A competitive salary & stock options
- The option to work in a brand new office situated on the AI Campus in Berlin where we closely cooperate with other exciting AI ventures
- Be on the forefront in defining what artificial intelligence means in manufacturing
- Gain hands-on experience in working in an AI-first software company
- Supportive and inclusive culture that values diversity and promotes the advancement of underrepresented groups within the company
- Collaborate with a diverse (currently more than 10 nationalities) and talented team, working on cutting-edge projects with real-world impact
- Network with professionals and leaders in the field, opening doors to potential future career opportunities
- We have a very flat hierarchy, open 360° feedback, and flexible working hours
- Ethics⚖: We are committed to developing ethical AI software
Job title
Job type
Experience level
Salary
Not specified
Degree requirement
Tech skills
Location requirements
Backend Engineer designing, developing, and maintaining backend applications using Spring Boot and Java for ING. Collaborating on architectural decisions and mentoring within an agile environment.
C# and .NET Core Developer developing high - performance services for mission - critical systems. Collaborating within Agile teams to enhance and maintain technical tools.
Full Stack Developer at Capgemini enhancing software solutions. Collaborating with global teams and engaging in the full software development lifecycle.
Full - Stack Software Engineer working on Java - based backend and Angular - based frontend development at Capgemini. Collaborating to build user - friendly web applications with a customer - first mindset.
Software Engineer II (Backend) developing and maintaining backend services for Wati’s SaaS platform. Collaborating with engineering teams to deliver reliable and scalable solutions.
Associate Software Engineer supporting Java applications in a student program at Sun Life. Engaging in software development and operations tasks to ensure application reliability.
Internship for Backend Developer (m/w/d) with Python focus in an innovative startup environment. Contribute to AI platforms and work with modern cloud technologies.
Java Analyst Programmer for Seidor Gesein participating in high - level technology projects. Develop and maintain enterprise applications while ensuring code quality and efficiency.
.NET Developer enhancing the Acquiring system at Nuvei, a Canadian fintech company. Join the team to develop innovative features for payment processing solutions.