Sr SDE - Issuance ( Backend )

Nium is the global infrastructure company powering real-time cross-border payments. Founded to deliver the payments infrastructure of tomorrow, today, we are building a programmable, borderless, and compliant money-movement layer that powers transactions between people, businesses, and intelligent systems — enabling banks, fintechs, payroll providers, travel platforms, marketplaces, and other global enterprises to move money instantly, anywhere in the world. Co-headquartered in San Francisco and Singapore, with offices in 14 markets and team members across 20+ countries, we take pride in a culture anchored in Keeping It Simple, Making It Better, and Winning Together. 2025 was the strongest year in our 10-year history, with record revenue, record transaction volumes, and EBITDA profitability — and we are now entering one of the most dynamic chapters in our journey. We believe the best work happens face-to-face, and we operate a hybrid model with three in-office days per week to strengthen collaboration, alignment, and innovation. We move over $50B annually across a network that spans 190+ countries, 100 currencies, and 100 real-time corridors. We power fast payouts to accounts, wallets, and cards; enable local collections in 35 markets; and support card issuance in 34 countries — all backed by licenses across 40+ markets. With over $300M raised to date, Nium offers ambitious builders the opportunity to shape the future of global money movement — at scale. Role Overview As a Senior Software Engineer at Nium, you will be a key contributor within a cross-functional team, collaborating with stakeholders across the organisation to design, build, and maintain our core platforms. You will leverage your experience to develop robust, scalable solutions to complex challenges, playing a critical role in the ongoing transformation of our technology landscape. In this hands-on role, you will actively contribute to development efforts while mentoring fellow engineers and guiding the team toward high standards of technical excellence. You will take ownership of code quality and foster a culture of continuous improvement through constructive feedback and leadership by example. You will advocate for engineering best practices, drive enhancements to tools and processes, and promote collaboration and knowledge sharing. Based in Mumbai, and working closely with our teams in Malta, you will help lead a talented engineering team in building and maintaining our card issuance capabilities that are shaping the future of the industry. 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. Key Responsibilities Platform & Business Insight Develop and maintain a deep understanding of the company's software platforms, business logic, infrastructure, and delivery processes. Technical Leadership Lead the design and planning of technical and product initiatives. Make informed engineering decisions aligned with business objectives. Act as a subject matter expert and set the benchmark for code quality and best practices. Team Contribution & Delivery Collaborate within a cross-functional team to deliver high-quality software solutions. Take ownership of the team’s output, ensuring adherence to quality and process standards. Mentorship & Knowledge Sharing Mentor engineers through code reviews, pair programming, and project leadership. Contribute to team development through training sessions, technical talks, and informal mentoring. Problem Solving & Process Improvement Identify technical challenges and lead the development of effective solutions. Enhance team collaboration by identifying skill gaps or inefficiencies and recommending actionable improvements. Communication & Alignment Clearly communicate technical decisions, standards, and processes. Foster a culture of transparency, open communication, and shared ownership. Talent Development Support recruitment efforts by participating in hiring processes and providing feedback on candidate competencies. Required Skills & Experience Software Engineering & Design 3 to 5 years of experience in designing and building robust, scalable software systems Strong passion for engineering and a pragmatic approach to high-quality delivery Up to date with current development trends, technologies, and best practices Solid understanding of modern software engineering methodologies and delivery processes Backend Development Deep expertise in Java and frameworks like Spring and Spring Boot Strong SQL and relational database design skills, including performance tuning and query optimization Proficient in designing and consuming RESTful APIs Familiarity with OpenAPI for API documentation DevOps & Infrastructure Experience or familiarity with tools like MySQL, Postgres, Kafka, Zookeeper, Docker, and Kubernetes Skilled in version control, build configuration, and automation tooling Quality Assurance Advocate for software quality through automated and manual testing Proficient with unit testing frameworks and related tools Collaboration & Communication Excellent communication skills, with the ability to explain complex technical concepts to both technical and non-technical audiences Strong team player who provides leadership and guidance on key initiatives