--- title: 'Senior ML Engineer at Solidgate' canonical: 'https://feeny.ai/job/senior-ml-engineer-solidgate-warsaw-4506g7xs65gk' type: 'job' last_seen: '2026-10-18' --- # Senior ML Engineer at Solidgate - **Company:** Solidgate - **Location:** Warsaw, Poland - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-10-09 - **Last confirmed live:** 2026-10-18 - **Apply:** https://jobs.ashbyhq.com/solidgate/5974c10f-2f07-4e37-8f9e-1f64ebe71f8f ## Job description ## Our Mission and Vision At Solidgate, our mission is clear: to empower outstanding entrepreneurs to build exceptional internet companies. We exist to fuel the builders — the ones shaping the digital economy — with the financial infrastructure they deserve. To achieve that, we’re on a bold path: to become the #1 payments orchestration platform in the world. We believe the future of payments is shaped by people who think big, take ownership, and bring curiosity and drive to everything they do. That’s exactly the kind of teammates we want on board. We're building the #1 payment orchestrator in the world — and the names behind us prove it. Our clients include Bolt, Ajax, Nova Post, Megogo and we're a direct partner of Visa and Mastercard with a European acquiring license. Operating in 150+ markets, with a trusting partners like J.P. Morgan. Solidgate is part of[Endeavor](https://endeavor.org/) — a global community of the world’s most impactful entrepreneurs. We’re proud to be the first payment orchestrator from Europe to join — and to share our expertise within a network of outstanding global companies. ## About the Team and Role This is a foundational hire on ML/AI direction at Solidgate — you'll be one of the first engineers building the function from the ground up, working closely with the ML team to shape it. You'll help stand up the ML/AI direction from scratch — on top of 20M+ orders and 100M+ transactions a month. The next big step is a realtime ML payment routing. That's the space you'll be building in. Explore our technology stack ➡️[here](https://solidgate-tech.github.io/). ## What you’ll own — Design and build core ML models and pipelines as part of a true greenfield direction, not a maintenance handover — A real-time ML decisioning system with direct revenue impact — Hands-on experimentation — from idea, through A/B testing, to production — Integrations of cutting-edge AI technologies to drive innovation — Close partnership with Product, Engineering, and the Data Platform team (who will help with data and MLOps) to solve hard modelling problems and build orchestrated training and analytics pipelines — Clear communication of technical results to both engineers and cross-functional stakeholders You’re a great fit if you have — 4-5+ years in ML or Data Science, with hands-on production experience in classical predictive models (e.g. credit scoring, fraud, risk, recommendations, pricing) — Track record of shipping ML models end-to-end, from idea to production, in a real product environment and being able to show their business impact in numbers (conversion, approval rate, losses, revenue) — Strong data science fundamentals — Hands-on experience with A/B testing and experimentation design — Feature engineering on high-cardinality transactional data — A driver mindset: you can walk into a greenfield space, figure out what to build, propose it, and own it through delivery — Great communication skills and comfort working with a wide range of stakeholders ## Nice to have — Experience in fintech, payments, fraud, or risk — Real-time / low-latency ML serving — A master's or PhD in a quantitative discipline Why Solidgate? Founding direction. You'll help build the function, the team, and the standards from day one, working alongside the Head of ML Great product. We’ve built a fintech powerhouse that scales fast. Solidgate isn’t just an orchestration player — it’s the financial infrastructure for modern Internet businesses. From subscriptions to chargeback management, fraud prevention, and indirect tax — we’ve got it covered. We hold EMI licence and are a direct Visa & Mastercard partner and sub-reseller. Impact you can measure. Every prediction has a clear outcome — approved or declined — which makes payments one of the few domains where ML ROI is provable per transaction. Scale. You'll work with 20M+ orders and 100M+ transactions monthly, 100+ payment methods and providers. Top-tier tech team. You'll lead and learn alongside engineers who hold the bar high and ship at fintech scale. Work from anywhere. Fully remote, no relocation required. We also have offices in Poland, Cyprus, and Ukraine. 💌 The Extras: 30+ days off, unlimited sick leave, free office meals, health coverage, and Apple gear to keep you productive. Courses, conferences, sports and wellness benefits — all designed for ideas, focus, and fun. Tomorrow’s fintech needs your mindset. Come build it with us. 🫂 Know top talent? We’re always on the lookout.[Refer someone](https://jobs.ashbyhq.com/solidgate/form/external-referral-program) for our role, and if they get hired, there’s a bonus waiting for you — simple as that. ## About Solidgate ## Company Overview - **One-liner**: Solidgate is a modern payment orchestration platform that enables digital businesses to accept, optimize, and scale global payments through a single API. - **Entity Type**: Private (Funding stage not disclosed) - **Headquarters**: London, United Kingdom - **Founded**: 2016 - **Founders**: Yuri Alekseev (Co-founder, former CEO) and Kirill Tarnopolskyi (CEO) ## Core Business - **Primary industry**: Financial Services / Payments / Fintech - **Target customers**: Fast-growing online businesses – including subscription services, cross-border e‑commerce, SaaS, marketplaces, and digital platforms - **Mission / purpose**: Build a truly large and successful fintech player that empowers outstanding entrepreneurs to build outstanding internet companies ## Products & Services - **Payment Orchestration Platform**: A unified API that connects merchants to multiple acquirers, alternative payment methods (APMs), and local payment methods. Includes intelligent routing, real‑time failover, and a provider‑agnostic card vault. - **Fraud Prevention & Chargeback Management**: Built‑in risk engine, prevention alerts, and automated dispute resolution. - **Subscription & Billing Engine**: Supports trials, usage‑based billing, and recurring payments without custom development. - **Tax Calculation**: Automated tax compliance across multiple markets. - **Treasury & Payouts**: Global accounts, corporate cards, and unified settlement reporting. - **Payment Links & Hosted Payment Form**: No‑code options for quick go‑live; customizable embeddable form for full UX control. - **Connectors Library**: Pre‑built integrations for 100+ APMs and hundreds of connectors; new providers can be added without reintegration. ## Market Standing - **Valuation / Market Cap**: Not publicly available - **Key Metric**: Headcount of 300+ (doubling year over year); LinkedIn reports 250 employees with +41.2% YoY growth - **Notable Clients / Partners**: Bolt, Ajax Systems, BetterMe, DMarket, DRESSX, Headway, Higgsfield, HOLYWATER, MEGOGO, Nova Post, Skylum, Zeely, and many more - **Growth Signals**: 99.99% uptime SLA; multi‑region infrastructure (active‑active global architecture); rapid headcount growth; expanding offices in Kyiv, Lviv, Warsaw, Nicosia, Dubai ## Competitive Advantages - **All‑in‑one platform**: Natively bundles payment orchestration, fraud, subscriptions, tax, chargeback management, and treasury – eliminating the need to stitch together separate tools. - **99.99% uptime guarantee**: Low‑latency performance with automatic failover across multiple providers and regions. - **Provider‑agnostic vault**: Tokens work across acquirers, enabling easy provider swaps without re‑tokenization. - **Speed to market**: Go‑live in as little as 1 day (simple setups) to 2 weeks (complex multi‑region rollouts); no‑code payment links available immediately. - **Enterprise‑grade security**: PCI DSS 4.0 compliant, tokenization, encryption, and full audit trail. ## Strategic Focus - Expand global footprint by adding more local payment methods and acquiring in new regions. - Continue to invest in the platform’s native capabilities (fraud, tax, billing) to reduce merchant reliance on third‑party tools. - Maintain a “fast, ambitious, sometimes messy” culture to attract top engineering and product talent. ## Why Work Here - **Culture**: Office‑first but flexible (remote, hybrid, or on‑site). Fast‑paced, high‑ownership environment where “your ideas matter, your decisions shape the product.” No rigid structure – ideal for those who thrive on autonomy and impact. - **Team**: 300+ people, doubling yearly; average hiring process 1.5–2 weeks. Active hirers of juniors and interns (sponsor ICPC teams, hackathons, career fairs). - **Tech Stack**: Go, Kotlin, Python, React, TypeScript, PostgreSQL, Redis, Node.js, AWS. Full DevOps: CI/CD, Terraform, Kubernetes, Grafana, VictoriaMetrics. - **Benefits**: 20 paid vacation days + unlimited sick leave; MacBook & accessories; medical insurance; daily office meals; Learning & Development budget; wellness budget; regular team‑building activities. - **Offices**: Kyiv, Lviv, Warsaw, Nicosia, Dubai (with London as HQ). ## Sources 1. [solidgate.com](https://solidgate.com/) 2. [solidgate.com/careers](https://solidgate.com/careers/) 3. [linkedin.com/company/solidgate](https://www.linkedin.com/company/solidgate) 4. [jobs.ashbyhq.com/solidgate](https://jobs.ashbyhq.com/solidgate) 5. [cbinsights.com/company/solidgate](https://www.cbinsights.com/company/solidgate) ## Other roles at Solidgate - [Technical Support Manager](https://feeny.ai/job/technical-support-manager-solidgate-europe-njy5pdj5ja1x) — Europe - [Junior Compliance Operations Specialist](https://feeny.ai/job/junior-compliance-operations-specialist-solidgate-kyiv-ea078dqpwvj6) — Kyiv, Ukraine - [Administrative Manager (Warsaw)](https://feeny.ai/job/administrative-manager-warsaw-solidgate-warsaw-z7p51145hfac) — Warsaw, Poland - [Lead Marketing Designer](https://feeny.ai/job/lead-marketing-designer-solidgate-kyiv-c2g53p67kd5m) — Kyiv, Ukraine - [Junior Business Operations Manager](https://feeny.ai/job/junior-business-operations-manager-solidgate-kyiv-td9ckm8rfkb7) — Kyiv, Ukraine - [Financial Analyst](https://feeny.ai/job/financial-analyst-solidgate-kyiv-3my3ehfky9ea) — Kyiv, Ukraine - [Junior Education Community Manager](https://feeny.ai/job/junior-education-community-manager-solidgate-europe-2de573ce6rkm) — Europe - [Integration Manager](https://feeny.ai/job/integration-manager-solidgate-europe-3na1xgs0t2n5) — Europe - [Junior Event Manager](https://feeny.ai/job/junior-event-manager-solidgate-kyiv-f0hnnbj8nnqr) — Kyiv, Ukraine - [Junior Business Analyst (Account Management and Sales team)](https://feeny.ai/job/junior-business-analyst-account-management-and-sales-team-solidgate-kyiv-hjg996w3fwcd) — Kyiv, Ukraine