At a Glance
- Tasks: Design and build innovative financial systems while leading customer integrations.
- Company: Join Dolfin, a cutting-edge fintech in London with a dynamic team.
- Benefits: Competitive salary, equity options, and a high-autonomy work environment.
- Other info: Be part of a fast-paced team with excellent growth opportunities.
- Why this job: Shape the future of AI in finance and make a real impact from day one.
- Qualifications: 2-4 years in software development, especially in fintech or API infrastructure.
Dolfin is an early-stage London fintech and member of Balderton's Launched programme building an agentic financial ops API for SMB platforms. They enable fintechs and banks to embed AI-native agents for invoicing, billing, and expenses directly into their products, moving beyond simple copilots to production-ready automation.
As a Software Engineer at Dolfin, you will bridge the gap between core product development and customer implementation. Splitting your time equally between shipping full-stack features and leading technical integrations, you'll ensure real SMBs go live on the platform. You’ll build reliable, AI-native financial infrastructure that handles high-stakes money movement.
Location: London, UK
Why this role is remarkable:
- Join a fast-moving team in the Balderton Launched programme with a multi-million pound pipeline and signed platform clients already in production.
- Work at the cutting edge of AI and fintech, building agentic workflows that handle real-world financial operations rather than simple demos or copilots.
- High-autonomy environment where you partner directly with founders to shape the engineering culture, product architecture, and technical roadmap from day one.
What You Will Do:
- Design and build event-driven, multi-tenant backend systems and frontend interfaces for the core agentic financial operations platform.
- Lead customer integrations end-to-end, serving as the primary technical architect on calls to unblock partner engineering teams and ship fixes.
- Deploy production-grade LLM workflows into financial environments, ensuring absolute correctness, auditability, and reliability for high-stakes money movement.
The ideal candidate:
- Possesses 2–4 years of experience shipping production software with a deep background in fintech API infrastructure, payments, or open banking.
- Demonstrates strong full-stack proficiency, comfortable owning both backend architecture and frontend implementation while operating in a fast-paced, unstructured environment.
- Displays a customer-centric engineering mindset, capable of translating integration friction into product improvements and building trust with external technical teams.
Software Engineer (£65k-£80k + Equity) at Dolfin employer: Jack & Jill
At Jack & Jill, we pride ourselves on being an exceptional employer that fosters a dynamic and innovative work culture. Our team enjoys a range of benefits including flexible working arrangements, professional development opportunities, and a collaborative environment that encourages creativity and growth. Located in a vibrant area, we offer unique advantages such as access to cutting-edge technology and the chance to work with industry leaders in AI-driven marketing strategies.
StudySmarter Expert Advice🤫
We think this is how you could land Software Engineer (£65k-£80k + Equity) at Dolfin
✨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 Jack & Jill 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 Jack & Jill.
✨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 Jack & Jill.
✨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 Jack & Jill 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 Software Engineer (£65k-£80k + Equity) at Dolfin
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 Jack & Jill.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Jack & Jill 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 Jack & Jill
✨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 Jack & Jill 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.
