Python Developer (44320)

CoolPeople Technology; Stockholms kommun; Hybrid; SEK 900,000 - 1,100,000; Full time

Job summary

CoolPeople Technology seeks a Python Developer focused on backend integrations for a large Nordic bank in Stockholm. You will build a Python-based conversion tool translating payment data between initiation systems and a payment engine, using Apache Kafka, Linux, and secure file transfers.

The project prioritizes ISO 20022 compliance, SEK payments, and modernisation of payments. The role involves collaboration with external software suppliers in an agile environment (Jira, Confluence,

Qualifications

• Strong Python experience for backend integrations and data conversion.
• Experience with file-based and event-driven integrations.
• Knowledge of Apache Kafka, Linux, and secure file transfers.

Responsibilities

• Develop and maintain a Python conversion tool for payment data.
• Implement file-based and Kafka-based integrations.
• Coordinate with external vendors in an agile environment.
• Ensure ISO 20022 compliance and secure data handling.

Skills

Python

Backend integrations

Apache Kafka

Linux Bash

SFTP/PGP encryption

Jira/Confluence

English proficiency

Tools

Jira

Confluence

WinSCP

PGP

Job description

Do you know how payment data really travels between banking systems? An international IT services company is looking for a Python Developer focused on backend integrations for a large Nordic bank in Stockholm. You will build and maintain a conversion tool that translates payment data between payment initiation systems and a payment processing engine, working with Apache Kafka, Linux and secure file transfers – as part of a programme modernising payments in Swedish kronor in line with ISO 20022.

Project

• modernisation of payment processing in Swedish kronor (SEK) and ISO 20022 compliance
• development and maintenance of a Python conversion tool between payment initiation systems and a payment engine
• file-based and event-driven integrations, message exchange via Apache Kafka
• secure file transfers using SFTP, WinSCP and PGP encryption
• Linux environments and shell scripts, troubleshooting of integration issues
• collaboration with external software suppliers in an agile team (Jira, Confluence, Scrum, Kanban)
• contract CP from 11/2026 for one year, Stockholm, hybrid with 40% home office

Skills

• strong hands-on Python for backend applications, integration tools or data conversion
• file-based integrations between applications and systems
• Apache Kafka, event-driven architectures and message processing
• Linux and shell scripting (Bash)
• SFTP, WinSCP and PGP encryption
• experience with banking systems, payment processing or financial transactions
• collaboration with third-party vendors, Jira & Confluence, Scrum / Kanban, English C1

Nice to have

• ISO 20022 financial messaging standards
• SEK credit transfer payment processes
• XML payment message formats (pain.001, pacs.008, pacs.002)
• integration of payment engines, banking platforms or transaction processing systems