(Senior) Java Developer - Freelance

Reposted Yesterday
Be an Early Applicant
Hiring Remotely in Poland
Remote
28-39 Hourly
Senior level
Information Technology • Software • Design
The Role
The Senior Backend Developer will enhance and maintain the main POS API, manage infrastructure as code using Terraform, and ensure reliable API integrations, working independently and following CI/CD best practices.
Summary Generated by Built In

Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.

Position: Senior Backend Engineer

Contract: B2B – Remote (EU Only)

Rate: up to 30 EUR/hour + 20 paid vacation days

Language: English C1
Responsibilities

  • Design and build scalable backend systems for processing large volumes of spare parts data
  • Develop and maintain robust, high-performance APIs for data integration and access
  • Build, optimize, and maintain ETL pipelines for data ingestion and transformation
  • Process and manage large datasets in distributed environments
  • Optimize system performance, latency, and throughput across backend services
  • Improve database performance through indexing, schema design, and query optimization
  • Collaborate with product managers, designers, and engineering teams to deliver scalable solutions
  • Work closely with stakeholders to define and implement data-driven functionalities
  • Ensure high standards of security, reliability, scalability, and maintainability
  • Mentor and support other engineers as part of a senior-level engineering role
  • Stay up to date with modern backend technologies, architecture patterns, and engineering best practices

Requirements
  • Tech stack & requirements
    • Strong commercial experience with JVM-based languages such as Java, Scala, or Kotlin
    • Solid experience with relational databases, including PostgreSQL and MySQL
    • Experience working with NoSQL databases, preferably MongoDB
    • Hands-on experience processing and managing large datasets
    • Strong knowledge of scalable API design and backend architecture principles
    • Experience designing distributed and high-performance systems
    • Practical experience building ETL pipelines using standard data processing tools
    • Experience with cloud platforms such as AWS, GCP, or Azure
    • Strong understanding of performance optimization and low-latency systems
    • Experience with database optimization, including indexing, schema design, and performance tuning
    • Strong problem-solving and communication skills
    • Senior-level mindset with the ability to mentor and support engineering teams
    • English at C1 level
    • Must be based in the European Union

BenefitsIn return, we offer:
  • 100% remote, flexible work;
  • work with an experienced team of developers and continuous development of your hard and soft skills;
  • dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes;
  • long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more).
What will happen next?
  • We would like to know you better, so we will invite you for a meeting with our recruiter.
  • Next, you'll be asked to solve the task or invited to an interview and pair programming with one of our iOS Developers.

Looking for a full-time job? Check out our Career Page and find out more about our open recruitment processes.

If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.

Skills Required

  • Proven experience in a Senior Backend Developer role
  • Proficiency with Kotlin
  • Hands-on experience with Kubernetes
  • Strong understanding of RESTful API design and maintenance
  • Working knowledge of Terraform
  • Familiarity with Git and CI/CD pipelines
  • Professional working proficiency in English
  • Experience with Golang
Am I A Good Fit?
beta
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
HQ: Poznań
501 Employees
Year Founded: 2008

What We Do

Netguru is a digital acceleration consultancy founded in 2008. Netguru builds digital products that let people do things differently – offering digital acceleration tools, resources and know-how to companies of all shapes and sizes – to make beautifully designed digital products in a way that’s fast and fits their needs. Netguru provides consulting services in product development, creating software solutions, and product design. Since our founding in 2008, our team has completed more than 1000 projects and has 500+ people on board working from all over the world. Currently, Netguru collaborates with the largest brands in the world, such as UBS, Merck, Volkswagen, IKEA, and Keller Williams, as well as fast-growing innovators in the financial (Solaris), education (Babbel) or robotics (Temi) industries. Netguru has been recognized as one of the fastest-growing companies in Europe. Our company was featured in the prestigious Deloitte’s Technology Fast 50 (four times) and in The FT 1000 list in 2017, 2018, 2019, and 2022. We're a certified B Corporation since 2020. Netguru was also recognized among the Best Workplaces, Poland in the 2021 edition of the Great Place To Work® listing. Connect with us to keep up to date with news from Netguru and follow the latest trends in our industry.

Similar Jobs

DuckDuckGo Logo DuckDuckGo

Senior Data Scientist

Information Technology
Remote
14 Locations
393 Employees
179K-179K Annually

MongoDB Logo MongoDB

Solutions Architect

Big Data • Cloud • Software • Database
Easy Apply
Remote or Hybrid
Poland
5550 Employees
235K-348K Annually

Superhuman Logo Superhuman

Customer Success Manager

Artificial Intelligence • Information Technology • Machine Learning • Natural Language Processing • Productivity • Software • Generative AI
Remote or Hybrid
2 Locations
1500 Employees
153K-191K Annually

Zscaler Logo Zscaler

Senior Technical Success Manager

Cloud • Information Technology • Security • Software • Cybersecurity
Easy Apply
Remote or Hybrid
Poland
8697 Employees

Similar Companies Hiring

Golden Pet Brands Thumbnail
Digital Media • eCommerce • Information Technology • Marketing Tech • Pet • Retail • Social Media
El Segundo, California
178 Employees
Kepler  Thumbnail
Fintech • Software
New York, New York
6 Employees
Onshore Thumbnail
Artificial Intelligence • Fintech • Software • Financial Services
New York, New York
60 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account