Junior Actuarial Systems Consultant (w/m/d)

hyperexponential

ABOUT HYPEREXPONENTIAL (HX) At hyperexponential, we're building the AI-powered platform that enables the world's most critical decisions in a $7 trillion industry - which risks to take, and how to price them. These are the decisions that shape real-world outcomes: whether rockets successfully launch into space, autonomous vehicles make it to market, or communities recover after major storms. Until now, insurance has been making billion-dollar decisions using outdated tools. We're changing that. Our platform brings together data, AI, and human expertise to give insurers the fastest path from submission to decision - helping them move faster, act smarter, and take on more risk with confidence. Backed by a16z, Highland Europe, and Battery Ventures, we're scaling globally - already trusted by nearly 50 of the world's largest insurers, with zero churn and billions in premiums flowing through hx. What began as a single product in one market has rapidly evolved into a multi-product, multi-territory platform powering every stage of pricing and underwriting. AI is at the core of what we do - from building the world's first domain-specific AI peer programmer for insurance (think GitHub Copilot with a PhD in actuarial science) to shaping agentic workflows that reinvent how this industry operates. What makes hx different is the people who build it. Here, impact isn't tied to title or tenure; it's defined by the challenges you take on and the discipline you bring. Surrounded by peers who stretch you, you'll do the best, hardest work of your life in a company engineered to endure. If that sounds like you, join us in building what comes next. ABOUT THE TEAM The Customer and Consulting team sits at the heart of how hx delivers lasting value to its clients. As hx continues to expand across global carriers, reinsurers, and specialist MGAs, this team ensures that customers don't just adopt the platform, they transform the way they price and underwrite risk. The post-sale Solution Architect is a critical part of that mission, responsible for making sure the hx platform is deeply embedded in customer ecosystems, from reporting pipelines to security infrastructure and third-party integrations. This is a team that operates at the intersection of technical depth and customer partnership. The work is hands-on and high-stakes: translating complex customer environments into durable, scalable technical solutions, while building the kind of trusted relationships that drive adoption, margin, and long-term value. You will work closely with Customer Success and Delivery colleagues, acting as the technical anchor across multi-threaded customer engagements. The team is growing, and there is real scope to shape how the Solution Architect function scales. Whether you are designing AI-first delivery artefacts, contributing reusable patterns to a shared toolkit, or presenting architecture decisions to a Chief Information Officer, your work will directly influence the outcomes customers achieve, and the reputation hx builds in the market. Check out our Client Services Candidate Hub for a behind the scenes look at the team you would be joining! WHAT YOU'LL BE DOING * Own the technical relationship with a portfolio of strategic customers, becoming the trusted advisor who anticipates challenges, aligns delivery to outcomes, and ensures the hx platform is embedded confidently within each customer's ecosystem. * Design and deliver bespoke integrations between hx and a range of customer technologies, including policy administration systems, data warehouses, BI tooling, and identity providers, applying sound architectural judgement throughout. * Drive customer adoption and platform usage by developing structured value realisation plans that translate technical delivery into measurable business outcomes, including faster quote turnarounds, reduced pricing errors, and stronger MI capability. * Build AI-first consulting and delivery artefacts that raise the bar for how the team works, creating reusable frameworks, templates, and innovation outputs that can be shared across the broader SA toolkit. * Support project margin outcomes by managing delivery scope, surfacing risks early, and coordinating effectively with Customer Success Managers, Delivery Leads, and customer-side technical teams. * Contribute to team capability by sharing patterns, leading internal show-and-tell sessions, and helping to codify best practices as the Solution Architect function grows and scales. WHAT YOU'LL NEED TO HAVE DONE * Able to code to a high standard using Python. * Supported the technical delivery of SaaS platform integrations in a team setting. It’s beneficial if you also have experience with AWS architecture, SQL, and a foundational understanding from a computer science or software development background. * Built and maintained positive technical relationships with colleagues and stakeholders, including IT and data teams, by communicating effectively across different priorities and environments. * Helped communicate technical choices and delivery progress to non-technical stakeholders, using clear, outcome-driven explanations that link integration work to business value. * Gained experience in a post-sale or customer-facing technical role—such as Junior Solution Architect, Technical Support, or Implementation Analyst—where you supported the delivery process or customer needs. * Used AI or automation tools to enhance the quality, speed, or consistency of your work, with an understanding of where these technologies can add value. * Supported the management of delivery processes, such as helping to plan project phases, identify risks, or coordinate with internal or external teams to meet project timelines. YOU'RE UNLIKELY TO THRIVE HERE IF * You prefer to stay in a narrow technical lane and hand off customer communication to others; this role requires genuine ownership across both the technical design and the stakeholder relationship. * You need a fully defined brief before getting started; ambiguity is a constant here, and the best work comes from people who move confidently without waiting for perfect information. * You measure success by delivery completion rather than customer outcomes; at hx, adoption, margin, and measurable value are the real bar. If reading our Culture Document leaves you feeling neutral rather than energised, hx may not be the place where you'll do your best work. We're building something that asks for commitment and conviction, and we want you to feel excited by the opportunity to grow with us. COMPENSATION At hx, we're committed to salary transparency. You'll always have clarity on pay early in the process - our Talent Partner will share details with you during initial conversations - and we're working towards publishing salary information for all roles globally. Because we're building at the intersection of technology/SaaS and insurance, our roles don't always map neatly onto traditional benchmarks. Our approach is to design compensation that's competitive in the market, fair across teams, and aligned with the impact our people make. Equity: We offer equity across all roles at hx, making it a significant component of total compensation. Your Talent Partner will be able to share more details about this. BENEFITS £5,000 training and conference budget for individual and group development. 25 days of holiday plus 8 bank holidays (33 days total). Company pension scheme via Penfold. Mental health support and therapy via Spectrum.life. Individual wellbeing allowance via Juno. Private healthcare insurance through AXA. Income protection and Life Insurance. Cycle to Work Scheme. Additional perks Top-spec equipment (laptop, screens, adjustable desks, etc.). Regular remote and in-person hackathons, lunch and learns, socials, and game nights. Team breakfasts and lunches, snacks, drinks fridge, and a fun office at The Ministry Exceptional opportunities for personal development and growth as we build something remarkable together. INTERVIEW PROCESS 1. Talent Screen - 30 minutes 2. Hiring Manager interview - 60 minutes 3. Skills Assessment - 60 minutes 4. Values interview - 60 minutes 5. We offer! OUR COMMITMENT TO DIVERSITY hxer's are at the centre of everything we build. We know that progress depends on diverse perspectives, and we are committed to creating an environment where everyone can thrive, grow, and make an impact. We recognise there is always more to do, and we take responsibility for shaping a workplace that is not only diverse but genuinely inclusive. Diversity is not just the right thing to do, it is key to solving the complex challenges we choose to take on. By welcoming people from all backgrounds and experiences, we strengthen our ability to question assumptions, push boundaries, and design solutions that endure. If you're energised by complexity and motivated to grow, we encourage you to apply and join our global team. NEXT STEPS If this opportunity resonates with you, we encourage you to apply or share it with your connections! Our dedicated talent team reviews all applications, and we promise to provide feedback regardless of the outcome. For more information about applying and to view other opportunities, you can visit our careers page. Please note that background checks will be conducted as part of the hiring process to ensure compliance with our governance policies. We handle all background checks sensitively and in full compliance with relevant regulations. All applicant data will be processed in accordance with data protection regulations and our privacy policy.

Marshmallow

We’re on a mission to make migration easy. We started building Marshmallow in 2017. Since then, we’ve grown from 3 to 700+ people, gained unicorn status, raised ~£140M over three funding rounds, turned profitable, insured millions of drivers and lent millions in car loans. But we’re only just getting started. Our goal is to become one of the largest financial services providers in the world. Over the next 10 years we’ll grow exponentially, not only by scaling our existing products, but also by building new ones. To achieve our goals we need incredibly ambitious, commercially driven people who never settle for ‘good enough’. Marshmallowers are hungry for autonomy and ownership, and would rather improve than coast. Everyone raises standards and has an impact, with a focus on collective success over self-interest. We’ve created an environment where curious, tenacious people win and grow together. If that sounds motivating, this could be the place for you. About the role This is a senior individual contributor role and the Controllership team's primary technical accounting expert. You will own the most complex and judgement-intensive accounting areas across the Group — spanning the UK insurance broker, claims handling, car finance and its associated SPV structure, and the Group holding company — and act as the go-to resource for the team, business stakeholders, and external auditors on technical accounting matters. You will work with a high degree of autonomy, reporting directly to the Group Financial Controller. You are expected to solve complex problems independently, document and defend accounting positions to audit standard, coach more junior colleagues, and communicate clearly to senior stakeholders across Finance and the wider business. This role sits at the heart of the Group's effort to close legacy accounting gaps, maintain audit readiness, and build controls that scale as Marshmallow grows. London (hybrid, 3 days in office) What you'll own Technical accounting across the Group * Own and maintain Group accounting policies across all entities in scope, ensuring alignment with FRS 102 and applicable regulatory requirements * Lead the Group's FRS 102 (2026 amendments) impact assessment and transition — with particular focus on revised revenue recognition and expected credit loss provisions across the business * Be the authoritative internal voice on complex, judgement-intensive areas across the Group including: share-based payments, capital development and intangibles, lease accounting, bad debt provisioning and impairment, periodic payment orders (PPOs), HP loan recognition and ECL provisioning, and SPV accounting * Own the technical accounting for the car finance business and its associated SPV structure * Own the technical accounting for the UK insurance broking and claims handling businesses * Drive resolution of legacy technical items and prior year audit findings — working through open issues to root-cause resolution rather than one-off workarounds Revenue recognition — transformation workstream * Lead the documentation and review of revenue recognition policies across the business, ensuring they are accurate, consistently applied, and fit for audit scrutiny * Own the technical accounting perspective on the revenue data workstream — understanding how revenue flows are constructed, identifying any gaps between accounting policy and practice, and driving remediation where needed * Work cross-functionally with Engineering, Data, and FP&A to ensure the financial reporting of revenue is grounded in a robust and well-documented technical foundation Insurance knowledge — Group-level review and challenge * Insurance industry knowledge is a core requirement of this role — while BAU technical accounting for the Group's insurance underwriting entity (based in Gibraltar) sits with a separate Finance team, you will be expected to review, challenge, and engage with Gibraltar Finance team from a Group perspective * This includes understanding earned premium, technical provisions, reinsurance accounting, and the financial reporting implications of the Group's insurance structures — and being able to apply that understanding in Group consolidation and in conversations with auditors * You will bring a Group finance lens to insurance-related accounting questions arising across the business Audit readiness & accounting quality * Prepare and review complex balance sheet reconciliations and accounting entries across the entities in scope, maintaining the quality and evidencing standard required for external audit * Act as the primary Finance contact for external auditors on technical accounting judgements — prepare clear, well-evidenced documentation for complex or contested positions * Proactively identify and close accounting quality gaps, with a focus on sustainable fixes that hold up to scrutiny in future audit cycles Coaching & cross-functional collaboration * Actively coach and develop more junior colleagues on technical accounting topics — raising the overall capability of the team is a genuine expectation of this role, not a secondary duty * Work alongside FP&A, Actuarial, Legal, and new business teams to embed technical accounting requirements early in product and process design * Support the Group Financial Controller in preparing clear technical accounting analysis for senior Finance stakeholders What we're looking for Technical accounting knowledge * ACA, ACCA or equivalent — fully qualified, with substantial post-qualification experience in a technical accounting or senior controllership role * Insurance industry knowledge is essential — you must have a working understanding of insurance accounting (earned premium, technical provisions, reinsurance structures) and be able to apply and challenge it at Group level from day one * Advanced, demonstrable command of FRS 102 and/or IFRS, with a track record of applying complex standards and documenting accounting judgements to audit standard * Experience with car finance or consumer credit accounting — HP income recognition, IFRS 9 / ECL, and ideally SPV or securitisation structures — is a strong advantage * Comfortable passing on technical knowledge and coaching colleagues — the expectation is that you actively raise the team's technical capability, not just your own output Background & experience * Big 4 audit background is a plus, particularly with insurance or financial services clients — the ability to construct and evidence robust accounting positions is directly relevant to how this team engages with its auditors * Experience in a multi-entity group structure with consolidated reporting across UK GAAP / FRS 102 * Prior exposure to FCA-regulated or insurance-regulated environments is strongly preferred Data & systems * Advanced Excel; strong working knowledge of ERP systems — NetSuite experience is an advantage * Able to work with large and imperfect data sets; comfortable deriving well-supported conclusions where source data has gaps * Familiarity with BI tools such as Looker or Snowflake is useful but not required How you work * Takes ownership of complex, multi-workstream problems and sees them through independently — escalates selectively and with good judgement * Presents highly complex analysis clearly to both technical and non-technical audiences * Proactively identifies control risks and improvement opportunities rather than waiting to be directed * Comfortable in an environment where process maturity is still developing — building rigour is part of the job, not an obstacle to it PERKS & BENEFITS * Bonus scheme designed to reward high performance * Private medical insurance with Vitality, mental health support with Oliva * Personal learning budget and 2 dedicated L&D days a year * Monthly flexible benefits budget to spend as you choose * 25 days holiday plus bank holidays * 4 weeks Work From Anywhere per year We are in a position to offer sponsorship and/or a visa for this position OUR PROCESS Here's what to expect: 1. Intro call with our Talent team (30 mins) 2. Skills and experience interview the hiring manager (1 hour) 3. Task-based interview (1 hour) 4. Values and ways of working interview (1 hour) We review every application and will always let you know the outcome - though we're unable to provide individual feedback at application stage. Diversity of thought We know the best ideas come from having different perspectives in the room - and we're committed to hiring fairly, regardless of background, identity or experience. If you see yourself in this role, we'd encourage you to apply.

hyperexponential

ABOUT HYPEREXPONENTIAL (HX) At hyperexponential, we’re building the AI-powered platform that enables the world’s most critical decisions in a $7 trillion industry - which risks to take, and how to price them. These are the decisions that shape real-world outcomes: whether rockets successfully launch into space, autonomous vehicles make it to market, or communities recover after major storms. Until now, insurers have been making billion-dollar decisions using outdated tools. We’re changing that. Our platform brings together data, AI, and human expertise to give insurers the fastest path from submission to decision - helping them move faster, act smarter, and take on more risk with confidence. Backed by a16z, Highland Europe, and Battery Ventures, we’re scaling globally - already trusted by nearly 50 of the world’s largest insurers, with zero churn and billions in premiums flowing through hx. What began as a single product in one market has rapidly evolved into a multi-product, multi-territory platform powering every stage of pricing and underwriting. AI is at the core of what we do - from building the world’s first domain-specific AI peer programmer for insurance (think GitHub Copilot with a PhD in actuarial science) to shaping agentic workflows that reinvent how this industry operates. What makes hx different is the people who build it. Here, impact isn’t tied to title or tenure; it’s defined by the challenges you take on and the discipline you bring. Surrounded by peers who stretch you, you’ll do the best, hardest work of your life in a company engineered to endure. If that sounds like you, join us in building what comes next. ABOUT THE MODEL DEVELOPMENT TEAM The hyperexponential Model Development team (MDT) is a unique blend of engineers, actuaries, mathematicians and data scientists. We don’t take on traditional “transformations” (we have brilliant partners for that) – we specialise in handling only the most difficult and interesting problems our customers face, where only a combination of technical depth, market expertise and hx Renew knowledge will do. The MDT are the experts' experts of hx Renew, knowing it top-to-bottom, inside-out – both breadth and depth. You’ll learn its limits and which can be pushed. You’ll uncover every trick in the book, the secret combinations, and the shortcuts. You’ll combine all of this with a growing knowledge of insurance technology to present 'the art of the possible' to our customers and help shape cutting-edge tech, while working alongside some of the brightest, most ambitious people in the tech and insurance industries. WHAT YOU’LL BE DOING * Learn the hx Renew modelling platform, you’ll ship your first models independently within days. * Build and maintain models in Python for seamless integration, applying modern approaches. * Work directly with customer actuarial teams, partner developers and internal colleagues to solve complex coding problems. * Contribute to the development of best-practice guidance for Python model building. * Review and test models as part of our day-to-day quality assurance process. * Support the creation and improvement of our internal and external training and development materials. * Always look for ways to refine and improve our model development standards and ways of working. WHAT YOU’LL NEED TO HAVE DONE * Developed strong Python skills, we’ll help you level up, but you’ll need production-grade experience to start with impact. * Applied predictive modelling or advanced analytics methods (exposure to insurance or reinsurance pricing techniques is a bonus, but not essential). * Shown a self-starter attitude, operating autonomously in a high-trust, high-accountability environment, and proactively driving your own development. * Demonstrated a passion for experimenting with new approaches and technologies, through work or personal projects. YOU’RE UNLIKELY TO THRIVE HERE IF * You prefer following detailed instructions rather than experimenting and finding your own approach. * You are uncomfortable working directly with non-technical stakeholders to understand their challenges. * You avoid tackling ambiguous or open-ended problems where the solution isn’t obvious. If reading our Culture Document leaves you feeling neutral rather than energised, hx may not be the place where you’ll do your best work. We’re building something that asks for commitment and conviction, and we want you to feel excited by the opportunity to grow with us. COMPENSATION At hx, we’re committed to salary transparency. You’ll always have clarity on pay early in the process - our Talent Partner will share details with you during initial conversations - and we’re working towards publishing salary information for all roles globally. Because we’re building at the intersection of technology/SaaS and insurance, our roles don’t always map neatly onto traditional benchmarks. Our approach is to design compensation that’s competitive in the market, fair across teams, and aligned with the impact our people make. Equity: We offer equity across all roles at hx, making it a significant component of total compensation. Your talent partner will be able to share more details about this. BENEFITS * £5,000 training and conference budget for individual and group development. * 25 days of holiday plus 8 bank holidays (33 days total). * Company pension scheme via Penfold. * Mental health support and therapy via Spectrum.life. * Individual wellbeing allowance via Juno. * Private healthcare insurance through AXA. * Income protection and Life Insurance. * Cycle to Work Scheme ADDITIONAL PERKS * Top-spec equipment (laptop, screens, adjustable desks, etc.). * Regular remote and in-person hackathons, lunch and learns, socials, and game nights. * Team breakfasts and lunches, snacks, drinks fridge, and a fun office at The Ministry. * Exceptional opportunities for personal development and growth as we build something remarkable together. INTERVIEW PROCESS * Initial call with our Talent team - 30 minutes * Take-home Python challenge followed by Skills Interview - 1 hour * Manager Interview - 1 hour * Values Interview - 1 hour OUR COMMITMENT TO DIVERSITY hxer's are at the centre of everything we build. We know that progress depends on diverse perspectives, and we are committed to creating an environment where everyone can thrive, grow, and make an impact. We recognise there is always more to do, and we take responsibility for shaping a workplace that is not only diverse but genuinely inclusive. Diversity is not just the right thing to do, it is key to solving the complex challenges we choose to take on. By welcoming people from all backgrounds and experiences, we strengthen our ability to question assumptions, push boundaries, and design solutions that endure. If you’re energised by complexity and motivated to grow, we encourage you to apply and join our global team. NEXT STEPS If this opportunity resonates with you, we encourage you to apply or share it with your connections! Our dedicated talent team reviews all applications, and we promise to provide feedback regardless of the outcome. For more information about applying and to view other opportunities, you can visit our careers page. Please note that background checks will be conducted as part of the hiring process to ensure compliance with our governance policies. We handle all background checks sensitively and in full compliance with relevant regulations. All applicant data will be processed in accordance with data protection regulations and our privacy policy.