Sr SDE - Issuance ( Backend - Java )

Nium provides global infrastructure for real-time cross-border payments. We were founded on the mission to deliver the global payments infrastructure of tomorrow, today. Our platform enables banks, fintechs, and global businesses to move money instantly, everywhere.

Co-headquartered in San Francisco and Singapore with offices in 14 markets worldwide, we are entering one of the most exciting chapters in our journey. In March 2026, we delivered the largest month in our 11-year history with record revenue, record volumes, and EBITDA profitability. Today, Nium moves nearly $60B in payments annually, almost entirely for enterprises, while continuing to strengthen an already healthy balance sheet.

It is an incredible time to join us, and we are only just getting started.

Our payout network spans 190+ countries and 100 currencies, with 100 + corridors in real time. We power seamless transfers to accounts, wallets, and cards, support local collections in 35 markets, and as a principal card issuer on Visa, Mastercard, Discover, and UATP, Nium issues over 50 million card tokens every year. Backed by regulatory licenses in 40+ markets, we make it simple for our partners to onboard, integrate, and scale globally. This scale and innovation have earned us recognition as one of CNBC’s World’s Top Fintech Companies 2025, winner of Best Cross-Border Payments Solution at the PayTech Awards, and inclusion in FXC Intelligence’s Top 100 Cross-Border Payments Companies list.

In 2024, we raised US$50 million in Series E funding at a US$1.4 billion valuation to accelerate network expansion, product innovation, and talent growth. With the B2B payments market projected to hit US$175 trillion by 2030, Nium offers ambitious builders the chance to shape the future of global money movement with the scale of a leader and the energy of a high-growth company.

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.

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
• 4 to 6 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

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. Beware of recruitment scams: Be cautious of individuals impersonating Nium via WhatsApp, social media, email or unofficial websites. Do not respond, share personal or financial information, or make any payments . Nium will never ask candidates to transfer money or cryptocurrency as part of our recruitment process.