Senior Software Engineer

Complexio Limited; Warszawa; On-site; PLN 80,000 - 120,000; Full time

Benefits offered by this job

Opportunity for professional growth

Collaborative team environment

Job summary

A technology company in AI automation is seeking an experienced software developer in Warsaw. The position requires 5+ years of experience in software development, strong proficiency in Python, and experience with cloud platforms. Join a diverse team and develop innovative solutions in a dynamic, challenging field with opportunities for professional growth.

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.

Responsibilities

• 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.

Skills

Software development

Python

vanilla JavaScript

PostgreSQL

Redis

cloud platform (Azure / AWS / GCP)

CI/CD pipelines

GitHub Actions

event-driven systems

distributed architectures

Docker

Kubernetes

English (min B2)

Tools

Neo4j

Milvus

spaCy

Transformers

Rust

Go

Java

C#

React

Vue.js

Electron

Tauri

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+ yearsof experience insoftware development.
• Strong experience withPython.
• Experience withvanilla JavaScript.
• Experience withrelational databases(PostgreSQL) andKV stores(Redis).
• Experience incloud platform(Azure / AWS / GCP).
• Experience withCI/CD pipelinesand tools likeGitHub Actions.
• Strong understanding ofevent-driven systemsand distributed architectures.
• Experience with containerizationtools (Docker/ Podman) and orchestration platform (Kubernetes).
• English min B2.

Nice to have

• Experience withgraph databases(Neo4j) andvector databases(Milvus).
• Experience withNLP libraries and frameworks(spaCy / Transformers).
• Proficiency in compiled languages (Rust, Go, Java, C#).
• Experiencewithmachine learning conceptsand the ability to work with NLP datasets.
• Experience in buildingweb applicationsusing modern frameworks (React, Vue.js) ordesktop 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.