
9fin · London
About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mi...
About 9fin
9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion.
Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces
this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value
workflows across global markets.
Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms,
law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention
driven by deep workflow adoption.
We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward
becoming the category-defining platform for debt markets worldwide.
delivering new service functionality — including APIs, data processing, and automation — while collaborating closely with
Product and Clients.
platform.
peers, and contributing ideas during research and experimentation with new technologies.
and emissions data capture, integration with ML/AI prediction services, data visualisation, and automation systems.
financial, legal, and editorial colleagues. You’ll work closely with non-technical stakeholders and help explain technical
concepts in a clear, accessible way to support effective team progress.
flags, and well-maintained non-production environments, enabling rapid iteration and feedback.
Our Backend Stack
production as quickly as possible.
Requirements
discussions and delivering production software.
to clients.
applying industry best practices for validation and reliability.
feedback and reviewing others’ work.
Benefits
We’re a scaling start up and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We
also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel.
Financial & Insurance
Time off
Training & Culture
9fin is an equal opportunities employer
At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential
and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited
about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might
just be who we’re looking for — either for this role, or perhaps another.
About the Role As an engineer in our Collection Engineering team, you'll build the tools and platform that power Elliptic's intelligence operation, the engine behind a product used by law enforcement, regulators, and the world's largest financial institutions to fight crypto crime. Intelligence flows into Elliptic from everywhere. All of it needs to be ingested, classified, stored, and reviewed before it can reach our proprietary graph database, the system at the heart of our market-leading products. Our team owns that pipeline end to end. Working alongside data scientists, analysts and researchers, you'll help design and build the services and tooling that scale the collection effort, remove bottlenecks, and free our intelligence team to focus on the work only humans can do. Your work will get stolen funds traced, ransomware actors identified, and sanctions enforcement enabled. Few engineering roles connect code and consequence so clearly. What you will do * Design and build software tools to improve and enhance our intelligence collection and analysis efforts. Examples of such tools range from services deployed on kubernetes to browser extensions and beyond. * Collaborate with a world class team of analysts and researchers to understand their processes and pain points, and automate them away. * Develop software to analyse and interpret cryptocurrency usage behaviours and trends. * Implement observability mechanisms to detect problems in your environment(s), and run the associated business processes to resolve. You will be a great fit here if you * Have a passionate interest in cryptocurrencies and blockchains and their usage (both from a technical and economic perspective) in the real-world. * Have great coding skills in Typescript and the proven ability to engineer good solutions. * Have increased operational efficiency by integrating disparate systems. * Enjoy working as part of a close-knit team on highly impactful problems, making the crypto ecosystem a safer space. * Promote a positive culture of collaboration, through open and effective communication, particularly when addressing issues or raising concerns. * Are able to form well reasoned, data driven or otherwise evidence-based arguments, to influence key stakeholders across the business. * Know when to build PoC vs production grade software. * Are fluent in AI and agentic workflows. Required Skills and Experience * 3+ years of commercial experience * Proficient in Typescript, plus React, Nest.js * Familiar with Postgres and K8s * Experience with AWS, Terraform, Datadog Bonus points * Has worked in an intelligence collection setting * Experience with “big data” technologies, the management of data, and data pipelines How we work * Hybrid working and the option to work from almost anywhere for up to 90 days per year * £500 Remote working budget to set up your home office space Learning & Development * $1,000 Learning & Development budget to use on anything (agreed with your manager) that contributes to your growth and development Vacation / Leave * Holidays: 25 days of annual leave + bank holidays * An extra day for your birthday * Enhanced parental leave: We provide eligible employees, regardless of gender or whether they become a parent by birth or adoption, 16 weeks fully-paid leave. Benefits * Private Health Insurance: We use Vitality! * Full access to Spill Mental Health Support * Life Assurance: we hope you will never need this - but our cover is for 4 times your salary to your beneficiaries * Cycle to Work Scheme
Role Mission From day one, you will be given the opportunity to engage directly with clients including CEO’s and co-founders to understand their needs and deliver bespoke solutions. You’ll dive straight into hands-on learning, guided by experienced developers who will mentor you and set you up to manage your own projects. As you grow, you’ll take on more responsibility, mentor junior developers and become an essential technical advisor within your team. You’ll thrive on solving complex problems, continuously expanding your technical skills and tackling new challenges. You will work as a Full Stack Developer working on creating innovative web and mobile applications for our clients, working as part of a small, dynamic team of developers. You’ll collaborate closely with agile and technical coaches to build scalable solutions using cutting edge technologies. Skills * React.JS or React Native * Node.Js (javascript/Typescript) or Python Proven * Ability to work directly with stakeholders * Strong communication skills and comfortable working in cross-functional teams * Stem or Computer Science Degree or comparative experience Advantageous Skills * Nest.js * AWS * Expo * Experience working in an Agile environment What we Offer Alongside a competitive salary, we also offer: * 25 Days annual leave * Learning and Development Support throughout your career at Theodo * Private Health Insure Via Vitality * 3 week work from anywhere policy * Equipment budget for your tech set up * Company pension * Monthly Socials * A Slack network of 600+ engineers across our extended ecosystem — ask questions, share patterns, or troubleshoot obscure bugs with some of the sharpest devs out there. * You'll work on a hybrid basis from our office based in London. Who are we Theodo UK is a software consultancy specialising in full-stack development, mobile and web applications and cloud solutions. We are a 70-person team based in the UK and South Africa, and we’re growing quickly.Theodo UK operates with the entrepreneurial drive, agility and ownership mindset of a start-up, but with the financial stability, global reputation and technical depth of the wider Theodo Group behind us. This unique position allows our team to innovate quickly, take smart risks, and build real value for clients—without compromising on quality. We follow Lean and Kaizen principles to continuously improve and deliver high-quality digital products at speed. While headquartered in the UK, our reach is global. Supported by our South African team, we manage projects across English-speaking markets worldwide. Values Team Spirit Our team has a natural ability to work together to achieve a common goal. Taking on the role of a good teammate requires courage; it means challenging and giving each other feedback. Its key to our teams succeeding Pragmatism Achieving effective results by utilising resources efficiently and avoiding unnecessary waste of time, energy and money. Emphasising agile practives, employing concise and direct interactions and engaging in firsthand experiences to challenge beliefs Willingness to Improve Actively identifying areas for improvement rather that tolerating good enough, promptly learning from problems and embracing challenges outside of one’s comfort sone. These are all skills we promote in our team to benefit themselves, fellow Theodoers, Theodo and the wider community
About Neo4j: Neo4j is the graph intelligence platform that transforms data into knowledge to power the next generation of intelligent applications and AI systems. It includes enterprise-ready knowledge graphs for accurate, explainable, and governed AI; the most comprehensive, trusted, and easy-to-deploy graph capabilities across any environment and data source; and an unmatched ecosystem trusted by 84 of the Fortune 100 and supported by the world’s largest graph community. Intelligence that works. Results that matter. Built to work everywhere and integrate with everything across every cloud for dynamic, personalized, and autonomous AI systems. We deliver quicker results, contextual knowledge, and solutions that impact customers and employees across the business. Our Vision: At Neo4j, we have always strived to help the world make sense of data. As business, society and knowledge become increasingly connected, our technology promotes innovation by helping organizations to find and understand data relationships. We created, drive and lead the graph database category, and we’re disrupting how organizations leverage their data to innovate and stay competitive. THE ROLE Neo4j is the leader in graph analytics, and our cloud platform is at the heart of powering data-driven innovation for thousands of users worldwide. We are on the lookout for versatile Full-Stack Engineers to help us design and build exceptional features that lower the bar for users to perform graph analytics. In this role, you will own the user-facing surface of those products. You'll help new users get to value quickly by reducing friction in their first workflows, and make our internal tooling effective enough that the rest of the team can support and operate the service confidently. You will work closely with our internal design system at neo4j.design, and collaborate across product, design, backend, and SRE to ship cohesive, end-to-end experiences. This is a mid-to-senior role at the intersection of product UX, graph analytics, and cloud data platforms. WHAT WE VALUE We’re looking for engineers with experience in both frontend and backend development. You should have experience designing APIs, implementing data persistence, and integrating with third-party services. Familiarity with automated testing approaches, from unit testing to full-stack integration tests, is important. A willingness to learn, grow, and tackle new challenges as part of a distributed and collaborative team is essential. WHAT YOU'LL DO As a Software Engineer, you’ll play a key role in delivering impactful features that enhance how users interact with Neo4j Aura graph analytics. You’ll work on everything from user-friendly interfaces to robust back-end systems, ensuring our solutions are scalable, reliable, and adaptable to diverse user needs. * Build and evolve the Aura Graph Analytics user experience inside the Neo4j Aura console. * Develop and maintain the in-app GUI for the Neo4j Graph Analytics App for Snowflake, an application that guides users through a multi-step workflow: selecting Snowflake data, projecting them as graphs, configuring and running algorithms, and writing back. * Design the graph-projection and algorithm-configuration UX for users who are not graph experts: clear workflow steps, sensible defaults, validation, and interactive previews of sampled graphs. * Improve the internal support tooling used to inspect the state of Aura Graph Analytics deployments and diagnose customer issues. * Use our shared design system (neo4j.design) so our products feel like one family. * Partner closely with product, design, backend, and SRE to ship cohesive end-to-end experiences across team boundaries. WHAT YOU'LL BRING * Experience building and shipping production-quality software. * Strong TypeScript / JavaScript skills and significant frontend experience in production codebases. * Solid experience with React and modern frontend tooling (such as Tailwind). * Comfort collaborating with designers in Figma (or similar tools) and translating designs into accessible, responsive UI. * A user-centric mindset and a genuine interest in product UX, not just shipping components. * Experience creating API services in Golang, Java or Python BONUS POINTS * Experience working with Spotify’s Backstage framework. * Familiarity with graph data, graph algorithms, or data-science workflows. * Experience with Python-based UI tooling such as Streamlit and AnyWidget. * Experience with Snowflake, Snowpark, and building UIs that run inside a Snowflake Native App. #LI-Hybrid Why Join Neo4j? Neo4j is, without question, the most popular graph intelligence platform in the world. We have customers in every industry globally, and our products are a proven product/market fit. Joining our team is an opportunity to shape the future of data and analytics. Below are just a few exciting facts about Neo4j. * Neo4j is one of the fastest-scaling technology companies in this industry. It recently surpassed $200M in annual recurring revenue (ARR), doubling its ARR over the past three years. * Raised the biggest funding round in database history ($325M Series F). Backed by world-class investors like Eurazeo, GV (formerly Google Ventures), and Inovia Capital, Neo4j has raised over $600M in funding and is currently valued at over $2Bn. This puts Neo4j among the most well-funded database companies in history. * 84% of the Fortune 100 and 58% of the Fortune 500 use Neo4j. Examples include Boston Scientific, BT Group, Caterpillar, Cisco, Comcast, Department for Education UK, eBay, NBC News, Novo Nordisk, Worldline, and others. * Co-founder and CEO Emil Eifrem has built an amazing culture that prides itself on relationships, inclusiveness, innovation, and customer success. * Countless industry awards. Massive enterprises and individual developers/data scientists love Neo4j. A strong sense of community and ecosystem is built around the platform. * A recent Forrester Total Economic Impact™ Study cited Neo4j as delivering 417% ROI to customers. Research shows that members of underrepresented communities are less likely to apply for jobs when they don’t meet all the qualifications. If this is part of the reason you hesitate to apply, we’d encourage you to reconsider and give us the opportunity to review your application. At Neo4j, we are committed to building awareness and helping to improve these issues. One of our central objectives is to provide an inclusive, diverse, and equitable workplace for everyone to develop their potential and have a positive, career-defining experience. We look forward to receiving your application. Neo4j Values: Neo4j is a Silicon Valley company with a Swedish soul. We foster collaboration and each of us is empowered to contribute and put our innovative stamp on projects. We hire candidates who reflect the following Neo4j core values: (we)-[:VALUE]->(relationships) (we)-[:FOCUS_ON]->(userSuccess) (we)-[:THRIVE_IN]->(:Culture {type: [‘Open’, ‘Inclusive’]}) (we)-[:ASSUME]->(:Intent {direction:’Positive’}) (we)-[:WELCOME]->(:Discussions {nature: ‘IntellectuallyHonest’}) (we)-[:DELIVER_ON]->(ourCommitments) Neo4j is committed to protecting and respecting your privacy. Please read the privacy notice regarding Neo4j's recruitment process to understand how we will handle the personal data that you provide. More information at www.neo4j.com. ©2026 Neo4j, Inc., Neo Technology®, Neo4j®, Cypher®, Neo4j Bloom™, Neo4j Graph Data Science Library™, Neo4j® Aura™, and Neo4j® AuraDB™ are registered trademarks or a trademark of Neo4j, Inc. All other marks are owned by their respective companies.