Senior Software Engineer

Addition; Greater London; Hybrid; Full time

Benefits offered by this job

26 days’ holiday + bank holidays + your birthday off

BUPA private healthcare

£1,000 annual development budget

Performance-based bonus

Regular socials, snacks

Job summary

A technology consulting firm is seeking a Senior Software Engineer skilled in Python (FastAPI) and SQL to lead the design and build of AI-driven applications. This role involves developing data pipelines, mentoring junior engineers, and maintaining high engineering standards. Exceptional communication skills and relevant security clearance are mandatory. In return, enjoy a competitive salary, performance-based bonus, and benefits like hybrid working and a generous holiday allowance.

Qualifications

• Strong track record delivering complex software projects end-to-end.
• Deep expertise in Python Application Development (FastAPI), with strong SQL capability.
• Hands-on experience building data pipelines, APIs and backend services.
• Solid understanding of cloud platforms and Bash scripting.
• Advanced Docker knowledge.

Responsibilities

• Leading design and build of AI applications.
• Developing scalable data pipelines.
• Setting standards for engineering across Python, SQL and cloud.
• Training and deploying machine learning models.
• Integrating new solutions with existing systems.

Skills

Python Application Development (FastAPI)

SQL capability

Building data pipelines

APIs and backend services

Cloud platforms (Azure/GCP)

Docker knowledge

Software engineering principles

Version control and CI/CD

Excellent communication skills

Mentoring technical team members

Tools

FastAPI

SQL

Docker

Bash

Azure/GCP

Job description

Overview

Lead Talent Consultant at Addition+, helping shape the next generation of Military Defence capabilities! (Engineering and Technology)

Role: Senior Software Engineer (Python - FastAPI)

Location: London (hybrid)

Package: Competitive salary + bonus + benefits

Industry: AI, Data Science & Technology Consulting

Security Clearance: Applicants Must have Active SC Clearance or above

What You’ll Be Doing

• Leading the end-to-end design and build of applications that utilise advanced AI and data-led software solutions.
• Developing scalable data pipelines and backend services that support complex modelling work.
• Setting standards for clean, efficient engineering across Python(FastAPI), SQL and cloud environments.
• Training, tuning and deploying machine learning models into production.
• Creating processes for robust data extraction, transformation and management.
• Integrating new solutions with existing systems and ensuring smooth deployment.
• Producing clear technical documentation and presenting findings to clients.
• Staying current with emerging technologies and bringing fresh ideas into the team.
• Contributing to proposals and shaping new project opportunities.
• Mentoring junior engineers and driving best practice across the engineering team.

Main Skills Needed

• Strong track record delivering complex software projects end-to-end.
• Deep expertise in Python Application Development (FastAPI), with a strong SQL capability.
• Hands-on experience building data pipelines, APIs and backend services.
• Solid understanding of cloud platforms (Azure/GCP) and Bash scripting.
• Advanced Docker knowledge, including storage, volumes and permissions.
• Strong grounding in software engineering principles, version control and CI/CD.
• Ability to review and improve others’ code with a collaborative approach.
• Excellent communication skills and confidence presenting technical work.
• Experience mentoring or line-managing technical team members.
• Eligible for UK security clearance (British citizenship and UK residency for 5+ years).

What’s in It for You

• A genuinely entrepreneurial environment with autonomy and variety.
• Projects spanning multiple industries, technologies and data challenges.
• 26 days’ holiday + bank holidays + your birthday off.
• BUPA private healthcare and a £1,000 annual development budget.
• Performance-based bonus and hybrid working from a modern Shoreditch office.
• Work from abroad for one month each year.
• Regular socials, snacks and a supportive, ambitious team.

Equal Opportunity

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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