At a Glance
- Tasks: Develop software across the full stack, from frontend to backend, using Python and React.
- Company: Join Fospha, a leading tech company transforming marketing analytics for top brands.
- Benefits: Enjoy flexible benefits, 25 days annual leave, and opportunities for travel.
- Other info: Dynamic team culture with strong mentorship and career growth opportunities.
- Why this job: Make a real impact on major brands' budget decisions with your code.
- Qualifications: Some software engineering experience and knowledge of Python and React required.
The predicted salary is between 63000 - 77000 £ per year.
Fospha is the measurement system enterprise retail and ecommerce brands run their business on. We give marketing teams one clear, daily view of what's actually working — across every channel and everywhere they sell, from their website to Amazon and TikTok Shop — down to the level of a single ad or piece of creative. It replaces guesswork and gut feel with a number marketing, finance and agencies can all trust and act on. Brands including Dyson, Gymshark, Adanola and Huel use Fospha up to 25 times a day to decide where budget should move next. We've spent over a decade building this, with more than $40 billion in marketing spend now optimised through the platform — and we're scaling fast across London, Mumbai and Austin.
About the role
Fospha builds the products our customers rely on every day to make multi-million dollar media decisions. You'll work across the full stack — from frontend UI/UX through to backend services, databases, and APIs in Python — alongside engineers, product managers, and AI agents as part of our AI-first operating model. You'll have the chance to make real code impact across our technical stack from day one, with senior engineers supporting you as you build ownership. This role suits someone with some hands-on software engineering experience (professional, placement, or strong personal/academic projects) who wants to go deeper. You'll take on interesting but achievable work with a supportive team structure and a company that rewards high agency with ownership.
Team: Engineering
Location: London
What you'll do
- Deliver small-to-medium features independently — frontend UI in React/Next.js, backend services and APIs in Python, working with databases (Aurora PostgreSQL, DynamoDB) — with decreasing need for step-by-step direction
- Write clean, tested code, and grow your ownership within a system area over time
- Participate actively in code reviews and design discussions — giving and receiving candid feedback
- Own bug resolution and act on QA feedback, improving test coverage as you go
- Work with AI agents as part of our AI-first operating model, learning to write clear specifications that shape high-quality, AI-assisted engineering work
- Collaborate proactively with product managers, designers, and fellow engineers to turn requirements into working software
- Get involved across the full Software Development Lifecycle — planning, execution, release, and production monitoring
- Start building the habits of ownership: consistent delivery, low rework, and steady, visible skill growth
What we're looking for
Essential
- Some hands-on software engineering experience — internships, placements, personal/open-source projects, or up to ~2 years professional experience
- Working knowledge of React.js or Next.js, a solid foundation in Python, and some exposure to databases (SQL or NoSQL)
- Comfortable being reviewed and iterating on feedback quickly
- Genuine attention to detail and a real interest in why something broke, not just that it did
- Curiosity about AI-assisted development and a willingness to learn spec-driven ways of working
- Confident asking for help and pushing for clarity rather than staying blocked
Nice to have
- Exposure to REST/GraphQL APIs
- Familiarity with Git/GitHub and PR-based workflows
- Some exposure to AWS or another cloud environment
- Experience writing or maintaining automated tests
- TypeScript experience
- Interest in AI-assisted coding tools (we use Claude Code day-to-day)
- Any exposure to Data Science / Data Engineering workflows
What we can offer you
- A £1,000/year flexible benefits allowance to put towards private medical insurance, dental cover, a health cash plan, gym membership, extra holiday, or a pension top-up — whatever suits you
- Access to Wellhub, giving you one membership across gyms, boutique studios, and wellbeing apps
- 25 days' annual leave plus 8 UK bank holidays, an extra day off for your birthday, and more holiday the longer you stay (26 days after 3 years, 27 after 6)
- Regular socials, free weekly snacks, and Lunch & Learn events at our Scale Space office, plus access to the wider Blenheim Chalcot community
- Opportunities to travel — including to our India and North America offices
- Life assurance worth 4x your annual salary
Why Fospha
- Real end-to-end ownership. You'll ship features that drive real budget decisions at brands you'll recognise, not just tickets in isolation.
- A published career framework. No guessing what the next level requires or when you'll get there.
- A team that reviews each other's work properly. Code review from people who care about getting it right.
- An AI-first operating model where lean, high-autonomy teams ship fast and learn faster — with structured mentorship from senior engineers as you build that fluency yourself.
Our Values and Principles
You will be able to demonstrate examples of our core principles:
- Seek inclusion & diversity: We create an environment where everyone feels welcome, and people are encouraged to speak and be heard
- Work Hard, Work Well, Work Together: We take responsibility for making things happen, independently and together; we help colleagues in need and close loops, making sure our work is complete and has lasting impact
- Grow: We are proactive, curious and unafraid of failure
- Customer at the heart: We care about the customer, feel their pain and love building product that solves their biggest problems
- Candour with caring: We deliver candid feedback with kindness and receive it with gratitude
Junior Software Engineer in London employer: Fospha
Fospha is an exceptional employer for aspiring Graduate Marketing Scientists, offering a dynamic work environment in London where innovation meets hands-on experience. With a strong focus on employee growth, Fospha provides structured support and dedicated development time, ensuring that every team member can thrive while working on cutting-edge marketing measurement solutions. The collaborative culture fosters learning and encourages clear communication, making it an ideal place for those eager to advance their careers in data science and marketing.
StudySmarter Expert Advice🤫
We think this is how you could land Junior Software Engineer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Fospha or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Fospha.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Fospha.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Fospha that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Junior Software Engineer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Fospha.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Fospha and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Fospha
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Fospha uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
