At a Glance
- Tasks: Build and own backend services, taking features from idea to production with real autonomy.
- Company: Join a dynamic Series A fintech backed by experienced founders making waves in financial tech.
- Benefits: Competitive salary, equity options, private health cover, and generous holiday allowance.
- Other info: Collaborate directly with founders in a small team environment with excellent growth potential.
- Why this job: Make a real impact in a fast-growing company while working with cutting-edge AI technology.
- Qualifications: 3+ years of backend engineering experience and a passion for ownership and innovation.
The predicted salary is between 90000 - 115000 £ per year.
Software Engineers (Mid & Senior Level) £70,000 - £115,000 + shares (DoE) London / hybrid - 3 days per week in the office Fintech - Series A funded. This is a rare opportunity. Early-stage enough to have real impact. Late enough to have real traction. The window where joining actually makes a difference.
Company: A Series A fintech backed by second-time founders who've previously raised and sold. They're building technology that sits inside critical financial infrastructure - already trusted by major Tier 1 banks, with US expansion underway.
The Role: This is a backend-heavy engineering role for someone who thinks like a product owner, not just an executor. You'll work across the stack and take real ownership end-to-end, from idea to production.
Key responsibilities:
- Build and own backend services across the core platform
- Work across frontend and infrastructure when needed - polyglot mindset valued
- Take features from requirements through to production with real autonomy
- Push back on requirements, think about the customer, and understand the bigger picture
- Contribute to architecture decisions as the team and platform scale
Stack: Java, GoLang, Python - React, TypeScript, Next.js - Terraform, GCP, GitHub Actions. AI? YES - They're shipping LLM-powered products. Exact tech match less important than strong backend fundamentals and a polyglot mindset.
You'll be a good fit if you...
- Have 3+ years of backend engineering experience
- Have worked at a startup or owned something from zero to production
- Are intellectually curious - you ask questions, dig into problems, and care about the why
- Want autonomy and responsibility, not just tickets
Why join?
- Real ownership: Small team, big responsibility. You'll work directly with the founders and have genuine influence over what gets built and how.
- Exceptional founders: Second-time founders with a proven track record. They've done this before and know how to build a company that lasts.
- Equity that could matter: Strong equity options from day one.
- Expanding fast: Already live with major UK banks, US expansion underway. This is a business with real momentum.
- Working with AI & latest tech: They're actively shipping LLM-powered features into production - and there's real appetite to go further.
The Package: ~ Mid-level: £70k–£90k | Senior: £90k–£115k base (DoE)~ Share options ~ Bupa private health cover ~25 days holiday + pension ~ Farringdon, London - hybrid, 3 days per week in the office (team lunches on Fridays!)
Interview Process:
- Intro call with a founder or senior team member
- Tech test and technical interview
- Onsite - meet the team and learn more about the role
Senior Software Engineer (C# / JavaScript) employer: Plan:it
Join a dynamic Series A fintech company in Farringdon, London, where you'll have the opportunity to make a significant impact in a small team with big responsibilities. With exceptional founders at the helm, you'll benefit from strong equity options, a culture of autonomy, and the chance to work with cutting-edge technology, including AI-powered features. Enjoy a hybrid work model, generous holiday allowance, and a collaborative environment that fosters both personal and professional growth.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Engineer (C# / JavaScript)
✨Tip Number 1
Network like a pro! Reach out to your connections in the fintech space or even those who work at the company you're eyeing. A friendly chat can sometimes lead to referrals, which can give you a leg up in the hiring process.
✨Tip Number 2
Prepare for the tech test! Brush up on your backend fundamentals and be ready to showcase your polyglot mindset. We recommend working on some personal projects that highlight your skills in Java, GoLang, or Python to impress during the interview.
✨Tip Number 3
Show your passion for ownership! During interviews, share examples of how you've taken features from idea to production. We want to see that you’re not just about executing tasks but also thinking about the bigger picture and customer needs.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in being part of our team and contributing to something impactful.
We think you need these skills to ace Senior Software Engineer (C# / JavaScript)
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that match our job description. Highlight your backend engineering experience and any projects where you've taken ownership from start to finish. We want to see how you can bring your unique flair to our team!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you're excited about this role and how your background aligns with our mission. Don’t just repeat your CV; tell us a story about your journey and what drives you in software engineering.
Show Off Your Projects:If you've worked on any interesting projects, especially those involving backend services or polyglot programming, make sure to mention them. We love seeing real-world applications of your skills, so include links to your GitHub or any live demos if possible!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows us you’re keen to join our team at StudySmarter!
How to prepare for a job interview at Plan:it
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially C#, JavaScript, and any other relevant languages like GoLang or Python. Brush up on your backend fundamentals and be ready to discuss how you've used these technologies in past projects.
✨Show Your Ownership Mindset
This role values autonomy and responsibility, so come prepared with examples of how you've taken ownership of projects from start to finish. Be ready to discuss challenges you faced and how you overcame them, demonstrating your problem-solving skills and product ownership mentality.
✨Ask Insightful Questions
During the interview, don’t hesitate to ask questions that show your intellectual curiosity. Inquire about the company’s vision for AI integration or how they approach architecture decisions. This not only shows your interest but also helps you gauge if the company aligns with your values.
✨Be Ready for a Technical Challenge
Expect a tech test and technical interview as part of the process. Practice coding problems and system design scenarios that reflect real-world applications. Familiarise yourself with common algorithms and data structures, and be prepared to explain your thought process clearly.
