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- Tasks: Build and maintain backend services for AI-powered software in critical industries.
- Company: Join a fast-growing tech startup on a mission to revolutionise essential industries.
- Benefits: Competitive salary, share options, 25 days leave, private healthcare, and flexible working.
- Why this job: Make a real impact by solving complex challenges with cutting-edge technology.
- Qualifications: Experience in Python/TypeScript and a passion for learning new tech.
- Other info: Dynamic team culture with opportunities for growth and regular social events.
The predicted salary is between 28800 - 48000 £ per year.
We live in a world that runs on physical industries like energy, logistics, and manufacturing. These sectors are essential to our economy and daily lives, yet they are held back by inefficiencies, fragile legacy systems, and decades-old ways of working. This is not just a business problem; it is a societal one. When grids fail, supply chains stall, or factories falter, entire economies are disrupted. These companies face unique, complex challenges that typical software was never designed to solve. Cogna was founded to change this. Our mission is to give critical industries their own AI-powered Software Factory: a way to build and deploy bespoke digital tools that solve pressing operational challenges. Since our launch in May 2023, we’ve seen incredible customer traction and revenue growth. We’re backed by leading VCs, including Notion Capital and Hoxton Ventures, and we’re building a world-class team to take on one of the most important challenges of our time. Tackling challenges at this scale takes people who are curious, adaptable, and motivated by impact. If our mission resonates with you, we encourage you to apply, even if your experience doesn’t match every requirement. We are committed to building a diverse team that reflects the industries and societies we serve.
Overview
Join a team that is redefining how software is built for critical industries. You will help build and maintain the backend services and integrations that power our SaaS applications, working with modern tech stacks and cutting-edge AI tools. This role is an opportunity to accelerate your growth: you will learn to build robust production systems and master AI-assisted development workflows, focusing on validating logic and delivering high-quality features that solve real-world problems.
What you’ll do
- Build and maintain backend features and API integrations (Python, FastAPI, SQL).
- Adapt and extend pipelines and front-end outputs, validating automated components.
- Build connectors for APIs, files, and external systems.
- Support the integration of LLM-based capabilities with robust evaluation and monitoring.
- Use AI-assisted development tools to scaffold, refactor, and test code.
- Collaborate with Solution Strategists, Data Platform, Platform and Support teams.
What we’re looking for
We don't expect you to have deep expertise in all these areas. We look for a solid foundation in backend engineering and a strong curiosity to learn the rest.
- Python/TypeScript experience (1+ years or strong personal projects); understanding of SQL and data modelling.
- Familiarity with (or keen interest in) agentic AI coding tools (e.g., Cursor/Codex/Claude Code) to plan, scaffold, refactor, and test.
- Experience with APIs (REST) required.
- Exposure to other systems like SFTP, SharePoint, or webhooks is a plus.
- Interest in or exposure to workflow orchestration (Temporal, Dagster).
- Basic familiarity with git, CI/CD concepts, Docker, or cloud platforms (Azure/AWS/GCP).
- Interest in AI and raising team AI skills.
What we offer
- Competitive salary and share option plan.
- 25 days annual leave, plus public holidays.
- Excellent pension scheme, fixed at 7.5%.
- Private healthcare, including family cover and pre-existing conditions.
- Flexible hybrid working with 2 days per fortnight in our Farringdon office.
- Regular social events and offsites.
- Access to a gym and fitness classes in our office building.
Junior Backend Engineer (App Delivery) employer: Cogna
Contact Detail:
Cogna Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Junior Backend Engineer (App Delivery)
✨Tip Number 1
Network like a pro! Reach out to people in the industry, attend meetups, and connect with potential colleagues on LinkedIn. You never know who might have the inside scoop on job openings or can put in a good word for you.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving Python, APIs, or AI tools. This gives you a chance to demonstrate your capabilities beyond just a CV.
✨Tip Number 3
Prepare for interviews by brushing up on common backend engineering questions and coding challenges. Practice makes perfect, so consider mock interviews with friends or use online platforms to get comfortable.
✨Tip Number 4
Don’t hesitate to apply through our website! Even if you don’t tick every box, your enthusiasm and willingness to learn can set you apart. We value curiosity and adaptability, so let us see your passion!
We think you need these skills to ace Junior Backend Engineer (App Delivery)
Some tips for your application 🫡
Show Your Passion for Backend Engineering: When writing your application, let us see your enthusiasm for backend engineering! Share any personal projects or experiences that highlight your skills in Python, SQL, or API integrations. We love seeing candidates who are genuinely excited about the tech they work with.
Tailor Your Application to Us: Make sure to customise your application to reflect our mission and values. Mention how your background aligns with our goal of tackling inefficiencies in critical industries. This shows us that you understand what we’re all about and how you can contribute.
Highlight Your Curiosity and Willingness to Learn: We’re looking for team members who are curious and eager to grow. In your application, emphasise your willingness to learn new technologies and tools, especially those related to AI-assisted development. This will resonate with us as we value adaptability and growth.
Apply Through Our Website: Don’t forget to apply through our website! It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it gives you a chance to explore more about our company and culture while you’re at it!
How to prepare for a job interview at Cogna
✨Know Your Tech Stack
Make sure you’re familiar with the technologies mentioned in the job description, especially Python, FastAPI, and SQL. Brush up on your knowledge of REST APIs and be ready to discuss any personal projects or experiences that showcase your skills.
✨Show Your Curiosity
This role values curiosity and a willingness to learn. Prepare examples of how you've tackled new challenges or learned new technologies in the past. This will demonstrate your adaptability and eagerness to grow within the company.
✨Understand the Mission
Cogna is focused on solving real-world problems in critical industries. Research their mission and think about how your skills can contribute to this goal. Be ready to discuss why this mission resonates with you during the interview.
✨Prepare for Collaboration
Since the role involves working with various teams, think about your past experiences in collaborative environments. Be prepared to share how you’ve effectively communicated and worked with others to achieve common goals, especially in tech-related projects.
