Senior Software Engineer

Complexio Limited; Warszawa; On-site; PLN 80,000 - 100,000; Full time

Benefits offered by this job

Professional growth opportunities

Collaborative team environment

Job summary

A leading AI company in Warsaw is seeking a skilled software developer with over 5 years of experience. The ideal candidate has a strong background in Python and JavaScript, experience in cloud platforms, and familiarity with databases. Join a dynamic team focused on revolutionizing business processes through AI and advanced technologies. Opportunities for professional growth and learning await you in this innovative environment.

Responsibilities

• Develop scalable software solutions using AI technologies.
• Collaborate with a diverse team to innovate and automate business processes.

Skills

Software development

Python

Vanilla JavaScript

Relational databases (PostgreSQL)

KV stores (Redis)

Cloud platforms (Azure / AWS / GCP)

CI/CD pipelines

GitHub Actions

Event-driven systems

Distributed architectures

Containerization (Docker, Podman)

Kubernetes

English (min B2)

Tools

Docker

Kubernetes

Job description

Complexio’s Foundational AI platform automates business processes by ingesting and understanding complete enterprise data—both structured and unstructured. Through proprietary models, knowledge graphs, and orchestration layers, Complexio maps human-computer interactions and autonomously executes complex workflows at scale.

Established as a joint venture between Hafnia and Símbolo—with partners including Marfin Management, C Transport Maritime, BW Epic Kosan, and Trans Sea Transport—Complexio is redefining enterprise productivity through context-aware, privacy-first automation.

The project focuses on enhancing business processes through the use of artificial intelligence and advanced technologies. It enables intelligent data handling and supports automated decision-making. Built with modern, high-performance solutions, it ensures efficiency, security, and scalability.

Qualifications

• 5+ years of experience in software development.
• Strong experience with Python.
• Experience with vanilla JavaScript.
• Experience with relational databases (PostgreSQL) and KV stores (Redis).
• Experience in cloud platform (Azure / AWS / GCP).
• Experience with CI/CD pipelines and tools like GitHub Actions.
• Strong understanding of event-driven systems and distributed architectures.
• Experience with containerization tools (Docker/ Podman) and orchestration platform (Kubernetes).
• English min B2.

Nice to have

• Experience with graph databases (Neo4j) and vector databases (Milvus).
• Experience with NLP libraries and frameworks (spaCy / Transformers).
• Proficiency in compiled languages (Rust, Go, Java, C#).
• Experience with machine learning concepts and the ability to work with NLP datasets.
• Experience in building web applications using modern frameworks (React, Vue.js) or desktop applications (Electron, Tauri).

• Join a pioneering joint venture at the intersection of AI and industry transformation.
• Work with a diverse and collaborative team of experts from various disciplines.
• Opportunity for professional growth and continuous learning in a dynamic field.