Senior Software Engineer at Ensembleanalytics.co.uk

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Job Title: Senior Software Engineer

Company Description: Ensembleanalytics.co.uk - High-growth logistics SaaS platform digitalising global port operations

Job Description:
Join a small, high-impact team building Athena, an intelligent platform transforming workforce management in the global supply chain. You will own the backend architecture for new products from concept to launch, turning rough operational ideas into production-ready Python systems that solve complex, real-world scheduling constraints for port operators and multimodal industries.

Location: London, UK

Why this role is remarkable:

• Ship code with immediate real-world impact on global supply chains, moving away from legacy systems to intelligent, automated workforce tools.
• Enjoy true product ownership in a flat ~8-person startup where you influence the roadmap and architect features from scratch rather than just closing tickets.
• Work from a premium London office at The Ministry, featuring an on-site gym, bike storage, and a collaborative, focused culture that prioritizes shipping over process theatre.

What you will do:

• Architect and build core backend systems including a complex pay calculation engine and a cross-client marketplace for shift requests.
• Design and deploy high-performance FastAPI and SQLAlchemy APIs within an AWS environment to power the Athena platform and employee mobile app.
• Collaborate directly with product and operations teams to translate ambiguous requirements into scalable, well-architected software solutions and integrated ML models.

The ideal candidate:

• 5+ years of professional experience shipping production-grade Python systems using FastAPI, SQLAlchemy, and PostgreSQL in a fast-paced environment.
• Deep technical proficiency with asynchronous workloads via Celery, containerization with Docker, and cloud deployment on AWS infrastructure.
• Strong architectural intuition and the ability to communicate complex technical trade-offs to non-technical stakeholders while operating with a high degree of autonomy.

Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs
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Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
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