Senior software engineer (Node.js/TypeScript)

Causaly

About us: Causaly is redefining how humans acquire knowledge and develop insights in biomedicine. Our AI-powered platform enables researchers and decision-makers to discover and interpret evidence from millions of scientific publications, clinical trials, regulatory documents, and other complex data sources in minutes. We are building the world’s most advanced biomedical knowledge platform, powered by a high-precision Knowledge Graph and GenAI capabilities. Our technology is already used by leading biopharmaceutical organizations to accelerate drug discovery, improve safety, and drive better decision-making. Backed by top-tier investors including ICONIQ, Index Ventures, Pentech, and Marathon, we are scaling rapidly and expanding our product suite and market presence.  We are looking for a Senior Fullstack Engineer to work on our API and business services. You will be responsible for designing and building scalable, reliable, and maintainable web applications. You will collaborate with our product and research teams to build and ship new features, contributing to all aspects of the development lifecycle, from requirements gathering to deployment and monitoring. WHAT WE'RE LOOKING FOR * 4+ years work experience with back-end applications * Solid understanding of Javascript * Familiarity with Node.js * Experience with TypeScript * Good knowledge of web architecture (URIs, HTTP, Caching, etc) * Proficiency in Git version control * Familiarity with UNIX terminal * Excellent knowledge of English language (verbal and written) * Solid understanding of relational databases Preferred Qualifications * Experience working with Knowledge Graphs and graph databases, such as Neo4J * Experience working with Full-Text search databases, such as ElasticSearch * Good understanding of GraphQL * Experience working with Docker * Experience working with a functional programming language * Experience working with AWS or Google Cloud OUR TECHNOLOGY STACK The list below is indicative and not exhaustive of the technologies we use at Causaly. * Node.js * Typescript * Git * ElasticSearch * Neo4J * RxJS * React * Webpack BENEFITS 💰 Competitive compensation package   🩺 Private medical & dental insurance 📔 Life insurance (4 x salary)   🤓 Personal development budget  🧘 Individual wellbeing budget  🌴 25 days holiday plus bank holidays  🥳 Your birthday off!  🚀 Potential to have real impact and accelerated career growth as a member of an international team that's building a transformative AI product. We are on a mission to accelerate scientific breakthroughs for ALL humankind, and we are proud to be an equal opportunity employer. We welcome applications from all backgrounds and fairly consider qualified candidates without regard to race, ethnic or national origin, gender, gender identity or expression, sexual orientation, disability, neurodiversity, genetics, age, religion or belief, marital/civil partnership status, domestic / family status, veteran status or any other difference.

Elliptic

Do you want to be part of the future of value transfer? Are you excited about solving problems that have never been solved before? Are you looking for a values led company, which cares about the growth of its employees? Elliptic's Real-time Risk team builds the engine that powers how our customers screen, monitor, and act on blockchain risk. We own the data pipelines, scoring infrastructure, and continuous monitoring systems that keep compliance teams ahead of financial crime, in real time, at enterprise scale. We're looking for a Senior Software Engineer to help us tackle the most technically demanding problems on the platform, working closely with data engineering counterparts to deliver capabilities that give customers a truly personalised, insight-rich view of the blockchain. The impact you will have: As a Senior Software Engineer on the Real-time Risk team, you will help shape the technical direction of a complex, high-stakes system. You'll work on world-class sanctions reporting, contribute to scaling the platform to serve Elliptic's rapidly growing customer base, and partner closely with data engineering counterparts to bring unique, customer-specific insights to life. This is a role for an engineer who wants to go deep, who can hold the complexity of distributed systems in their head, and who takes pride in building things that are both correct and fast. What you will do: * Design and build robust, high-throughput backend services supporting real-time risk scoring, screening, and continuous monitoring workflows. * Work closely with data engineering teammates to deliver personalised intelligence to our customers, enabling unique, customer-specific views of the blockchain. * Contribute to world-class sanctions reporting infrastructure that compliance teams and regulators depend on. * Help scale the system to support Elliptic's growing enterprise customer base, identifying and resolving performance and reliability bottlenecks. * Take ownership of technically complex areas, driving architecture and implementation decisions with sound trade-off reasoning. * Review code, raise the technical quality of the team, and mentor engineers where appropriate. * Collaborate with product, data, and engineering stakeholders to translate compliance requirements into well-designed, maintainable systems. What you will achieve in the first 6 months: * Deliver meaningful contributions to the Real-time Risk platform, building confidence across the codebase and event-driven architecture. * Demonstrate clear technical ownership of an area of the system, including participation in design decisions and code review. * Have a strong understanding of how sanctions screening and continuous monitoring work end-to-end, and be able to articulate where the biggest engineering challenges and opportunities are. You will be a great fit here if you: * Take joy from building solutions that solve real customer problems * Enjoy working in domains where correctness matters, and where the systems you build are depended on by real customers in regulated industries. * Have a love of data intensive applications and products * Take a pragmatic approach to complexity, knowing when to simplify and when to invest in the right abstraction. Our ideal candidate has: * 5+ years of professional software engineering experience building and operating production backend systems. * Strong TypeScript/Node.js experience, with the ability to write clean, well-tested, production-ready code. * Proven experience working with complex event-driven, streaming, or queue-backed architectures (e.g. Kinesis, Kafka, SQS, or similar) in a production environment. * Solid understanding of distributed systems trade-offs: consistency, availability, latency, and failure modes. * Experience working with NoSQL and caching technologies, with comfort reasoning about data access patterns and performance. * A track record of contributing to technically complex codebases, and the ability to communicate architectural thinking clearly. * AI fluency: you actively use AI tools to accelerate your work, and can demonstrate how you apply them effectively in engineering contexts. Bonus Points for: * Experience with Java, Scala, or another multi-threaded, JVM-based language. * Familiarity with Redis or similar in-memory data stores, particularly for caching and low-latency reads. * Experience with EVM-compatible blockchains or crypto compliance domains. * OpenSearch/Elasticsearch experience, particularly around index design and schema migrations. JOB BENEFITS 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: 4 times your salary to your beneficiaries * Cycle to Work Scheme

Fonoa

Fonoa is the Tax Operating System for autonomous tax. AI that tracks every rule, acts on every obligation, and proves every decision, built on modular infrastructure. Fonoa’s modules cover the full indirect tax lifecycle: tax ID validation, real-time tax determination, e-invoicing, and returns. All on one shared data model and integration, with one audit trail. Each added capability makes the others stronger. Agents monitor obligations, populate returns, catch anomalies and assemble audit packs in seconds. The system does the work. Humans make the calls. That’s autonomous tax. We operate across 120+ countries, with clients going live in weeks, if not days. Trusted by Canva, Netflix, Spotify, Uber, Zoom and Booking.com. Rated 4.5/5 stars and a High Performer on G2 and 4.6/5 stars on Gartner Peer Insights. Find out more: www.fonoa.com ABOUT ENGINEERING AT FONOA Engineering is central to how we build the business. We focus on solving real customer problems, not just shipping features. We work in small, high-trust teams, with full ownership across the lifecycle, from design to production and beyond. We value: * Ownership – engineers own what they build end-to-end * Simplicity – we break down complex problems into clear solutions * Thinking Big - we innovate with modern technologies (LLMs, AI Agents, etc.) to solve meaningful problems * Quality – scalable, maintainable systems are non-negotiable * Speed & iteration – we ship fast, learn, and improve continuously * Collaboration – we win as a team, not as individuals POSITION OVERVIEW As Fonoa continues to scale globally, we are looking for a Software Engineer, ERP Integrations to help us build and expand integrations with complex enterprise systems used by some of the world’s largest companies. This role sits at the intersection of product engineering, enterprise systems, and large-scale financial workflows. You will work on designing and building integrations that connect Fonoa with ERPs, billing platforms, procurement systems, and other critical parts of the enterprise ecosystem. This is not a role focused on maintaining isolated connectors. You will work on solving complex integration challenges at scale dealing with large external APIs, inconsistent data models, reliability concerns, and evolving customer requirements. You will help shape how our platform integrates into core enterprise workflows such as Order-to-Cash and Procure-to-Pay. You’ll work closely with engineering, product, and customers to understand how businesses operate in practice and translate those workflows into scalable, reliable product capabilities. We are looking for someone who enjoys operating in complex environments, has strong ownership, and is excited by the challenge of building systems that sit at the core of critical financial operations. This is a highly collaborative, hands-on role for someone who enjoys solving difficult integration problems, building robust systems, and continuously improving how enterprise systems connect and exchange data. What You Will Do * You are fully proficient in English. Written and spoken, we are from around the world, but we work in English. * You have a strong sense of ownership, care about what you build, and do the right thing that serves your customers. * You’re a builder at heart; you like the opportunity of having tons of exposure, making things work for a company long term, and having an entrepreneurial attitude toward anything that comes your way. * You have experience building or operating integrations with enterprise systems, such as ERPs, billing platforms, or large financial systems. * You understand how enterprise business processes like Order-to-Cash and Procure-to-Pay work, and how systems integrate within those flows. * You have hands-on experience with a single ERP or enterprise system and are motivated to apply those patterns while learning others. * You are comfortable working with complex external APIs and data models, and designing for reliability, scalability, and correctness. * You ship fast, continuously, and iteratively, learning each step. * You like to use data over opinions to make decisions. And are ok with finding the data yourself when it’s missing. * You are comfortable with change, either in priorities, goals and deadlines. You see this more as an opportunity than a hurdle. You are also satisfied with challenging the status quo and pushing for change. * You want to make a severe impact and are excited about working in a high-growth startup. WHAT WE’RE LOOKING FOR * Fully proficient in English, written and spoken — we are a global team and work in English * Strong sense of ownership and responsibility for what you build * Builder mindset with curiosity, proactivity, and an entrepreneurial approach to problem solving * Experience building or operating integrations with enterprise systems such as ERPs, billing platforms, or large financial systems * Understanding of enterprise business processes such as: * Order-to-Cash (O2C) * Procure-to-Pay (P2P) * Hands-on experience with at least one ERP or enterprise platform, and interest in learning others * Comfortable working with complex external APIs, large data models, and distributed systems * Ability to design systems with reliability, scalability, and correctness in mind * Comfortable shipping iteratively, learning quickly, and improving continuously * Data-informed mindset and willingness to investigate problems independently * Comfortable operating in fast-changing environments with evolving priorities * Excited about making a meaningful impact in a high-growth startup environment API DOCUMENTATION For engineers, API design and structure are an important part of evaluating a role. You can explore our API and how we build products here: https://docs.fonoa.com/ TECH STACK We use these technologies today, but we don’t hire for specific tools. We care about engineers who can understand problems, make good technical decisions, and choose the right tools for the job. * Backend: Node.js, Go * Frontend: React, TypeScript * Infrastructure: GCP,, k8s, Terraform, Postgres Note: If you don’t think you have the full experience we’re looking for, but you could be a fit and are willing to learn, do apply anyway! We are building diverse and inclusive team. As part of the recruitment process at Fonoa, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.