Senior Python Engineer (Hybrid in London)

Signify Technology; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Signify Technology in London is seeking an experienced Senior Python Developer to design, build and optimise backend systems. You will leverage Python, SQL and Kafka to deliver scalable data-processing solutions in a hybrid working environment.

The ideal candidate has 5+ years in software development, strong SQL, Linux skills, and experience with distributed systems. You will collaborate with data engineers and analysts, follow coding standards, and contribute to production releases and

Qualifications

• 5+ years of hands-on software data engineering experience.
• Proficient Python programming for development and automation.
• Advanced SQL writing, complex queries and optimisation.
• Linux/Unix command line, scripting and troubleshooting.
• Apache Kafka experience for event-driven data processing.
• Experience with PostgreSQL/Oracle/SQL Server/MySQL.
• Strong analytical, debugging and collaboration skills.
• Familiarity with Git or similar version control.

Responsibilities

• Design and maintain Python-based applications and backend solutions.
• Write and optimise complex SQL queries with joins, subqueries, and window functions.
• Tune SQL queries and resolve database performance issues.
• Process large datasets using relational databases.
• Develop automation scripts and batch jobs in Linux.
• Work with Apache Kafka for data streaming and event-driven integration.
• Monitor performance, troubleshoot production issues, and implement fixes.
• Collaborate with data engineers, analysts and developers.
• Follow coding standards, version control, testing, and deployment processes.
• Support releases and contribute to continuous improvement.

Skills

Python

SQL

Linux/Unix

Apache Kafka

Relational databases

Git

Communication

Job description

Job Title: SeniorPython Developer

Location: London, UK
Working Model: Hybrid
Experience: 5+ Years

Job Overview

My client arelooking for an experienced Python & SQL Developer with strong hands-on experience in developing, maintaining, and optimising applications and data-processing solutions. The ideal candidate will have excellent Python programming skills, advanced SQL expertise, and practical experience working in Linux environments and with Apache Kafka.

Strong SQL skills are essential for this role, particularly the ability to write complex queries, optimise query performance, and work with large datasets. The successful candidate will collaborate with cross-functional teams to develop reliable, scalable, and high-performance solutions.

Key Responsibilities

• Design, develop, test, and maintain applications and backend solutions using Python.

• Write, analyse, and optimise complex SQL queries involving multiple joins, subqueries, CTEs, window functions, and aggregations.

• Perform SQL query tuning and troubleshoot database performance issues.

• Work with relational databases to retrieve, transform, validate, and process large volumes of data.

• Develop and maintain scripts, automation tasks, and batch-processing jobs in Linux environments.

• Work with Apache Kafka for event-driven processing, data streaming, and message-based integrations.

• Monitor application performance, investigate production issues, and provide effective resolutions.

• Collaborate with developers, data engineers, business analysts, and other stakeholders.

• Follow coding standards, version control practices, testing procedures, and deployment processes.

• Support production releases, troubleshoot technical issues, and contribute to continuous improvement.

Required Skills and Experience

• 5+ years of hands-on experience in software development, data engineering, or a related technical role.

• Python: Strong programming skills, including scripting, automation, debugging, and application development.

• SQL – Mandatory: Excellent ability to write complex SQL queries, including multi-table joins, nested queries, CTEs, window functions, aggregations, and query optimisation.

• Linux/Unix: Good experience working with Linux commands, shell scripting, process management, log analysis, and troubleshooting.

• Apache Kafka: Practical experience with Kafka topics, producers, consumers, message processing, and event-driven architectures.

• Experience working with relational databases such as PostgreSQL, Oracle, SQL Server, or MySQL.

• Strong analytical, problem-solving, and debugging skills.

• Experience working with Git or other version control systems.

• Good communication skills and the ability to work effectively within a team.

Preferred Skills

• Experience with high-volume data processing and distributed systems.

• Familiarity with Kafka consumer groups, offsets, partitions, and message delivery semantics.

• Experience with performance tuning, production support, and root-cause analysis.

• Knowledge of REST APIs, automated testing, and CI/CD pipelines.

• Experience working in Agile development environments.

Must be already based in London or surrounding areas