Sr SDE - Full Stack

Nium, the Leader in Real-Time Global Payments Nium, the leading global infrastructure for real-time cross-border payments, was founded on the mission to deliver the global payments infrastructure of tomorrow, today. With the onset of the global economy, its payments infrastructure is shaping how banks, fintechs, and businesses everywhere collect, convert, and disburse funds instantly across borders. Its payout network supports 100 currencies and spans 190+ countries, 100 of which in real-time. Funds can be disbursed to accounts, wallets, and cards and collected locally in 40 markets. Nium's growing card issuance business is already available in 34 countries. Nium holds regulatory licenses and authorizations in more than 40 countries, enabling seamless onboarding, rapid integration, and compliance – independent of geography. The company is co-headquartered in San Francisco and Singapore. About the Role We’re building the next wave of remittance products and looking for a seasoned full-stack engineer who doesn’t just code, but shapes technical direction, leads by example, and elevates the team. If you care deeply about user experience, performance, clean architecture, and shipping with discipline — read on. What we offer at Nium We Value Performance: Through competitive salaries, performance bonuses, sales commissions, equity for specific roles and recognition programs, we ensure that all our employees are well rewarded and incentivized for their hard work. We Care for Our Employees: The wellness of Nium’ers is our #1 priority. We offer medical coverage along with 24/7 employee assistance program, generous vacation programs including our year-end shut down. We also provide a flexible working hybrid working environment (3 days per week in the office). We Upskill Ourselves: We are curious, and always want to learn more with a focus on upskilling ourselves. We provide role-specific training, internal workshops, and a learning stipend. We Celebrate Together: We recognize that work is also about creating great relationships with each other. We celebrate together with company-wide social events, team bonding activities, happy hours, team offsites, and much more! We Thrive with Diversity: Nium is truly a global company, with more than 33 nationalities, based in 18+ countries and more than 10 office locations. As an equal opportunity employer, we are committed to providing a safe and welcoming environment for everyone. For more detailed region specific benefits : https://www.nium.com/careers#careers-perks For more information visit www.nium.com Depending on your location, certain laws may regulate the way Nium manages the data of candidates. By submitting your job application, you are agreeing and acknowledging that you have read and understand our Candidate Privacy Notice located at www.nium.com/privacy/candidate-privacy-notice. Key Responsibilities You’ll lead delivery of high-impact, large-scale features and systems — from UI through backend, into production. You’ll define and evolve architecture: from UI/UX patterns using Next.js/React to backend services built in Java or Node.js . You’ll handle non-functional requirements: scalability, performance, security, maintainability (i.e., you’ll think long term, not just ship fast). You’ll mentor and guide while still being hands-on: influential in code reviews, designing modules, owning releases You’ll collaborate across teams (Product, UX, QA, DevOps) and help craft the roadmap: anticipate technical debt, drive build vs buy decisions, champion best practices. You’ll continuously raise the bar: propose new frameworks, tools, infrastructure improvements; help the team evolve. Requirements Experience & Impact 2-5 years (of full-stack software development with real ownership. Proven track record of delivering production systems (UI + backend + services) end-to-end. Comfortable leading technical design discussions, making trade-offs, and owning architecture decisions. Strong debugging/profile skills: you don’t just write code, you make it performant, reliable, and resilient. Technical Skills Frontend: Deep experience in React + Next.js (or equivalent SSR/SPA frameworks). Backend: Strong with Java (Spring Boot, microservices) and/or Node.js services. Databases: both relational (e.g., PostgreSQL/MySQL) and NoSQL (e.g., MongoDB/Redis) knowledge. Cloud/Infrastructure: Experience with AWS/Azure/GCP; knowledge of CI/CD, containerization, service orchestration. Distributed systems awareness: service-oriented architecture, API design, caching, scaling, reliability. Testing / Quality: Unit, integration, e2e, performance testing. You advocate for quality. Soft skills: Excellent communication (technical & non-technical), ability to mentor, influence, persuade, and simplify complexity Nice-to-Have Experience with TypeScript (especially on the frontend) and backend TypeScript/ Node.js . Familiar with serverless architectures or edge computing. Built SaaS/B2B platforms, handled multi-tenant systems. Experience with UX/performance metrics and frontend optimizations (web vitals, bundle size, critical rendering path). Familiar with modern CI/CD pipelines, IaC (Terraform/CloudFormation), monitoring/tracing tools.