Software Engineer (Backend)

About us:

Modak is a US-based fintech platform leveraging the power of finance and technology to empower kids and teens to reach their full potential. We pursue this mission by offering a gamified fintech and learning ecosystem - with Visa debit cards, family checking accounts, payment applications, enabled by AI-powered infrastructure and embedded with financial literacy. We are built for scale and security using leading technologies and best practices that power tens of thousands of API calls per day (and scaling rapidly!).

We are a global company, with teams across the US, Latam and India. We do in person retreats every 3-4 months. If you are hungry to learn, humble to work with, and hustle to find creative ways to solve problems, we would love to hear from you - especially if you are living in the US, Colombia, Argentina, Brazil or India.

Modak is currently at the Series A stage, having raised $19M from leading investors, including Notable Capital (Airbnb, Anthropic, Square, TikTok, Coinbase), Nazca (Kavak, Justo), Monashees (Rappi, Loft), ONE VC, Maya Capital, and more than 40 other top angel investors, founders, and operators across the US, India, and Latin America.

What you will do

You’ll help design, build, and scale Modak’s backend systems that power our financial ecosystem. You’ll work closely with product and engineering teams to deliver secure, reliable, and performant APIs. Your work will include integrating external partners, improving internal systems, and mentoring peers — always with a focus on quality, scalability, and customer impact.

Key responsibilities include:

• Building and maintaining scalable API services and integrations.
• Ensuring data integrity, security, and PCI DSS compliance.
• Collaborating with cross-functional teams to deliver impactful features.
• Promoting engineering excellence through testing, documentation, and mentorship.

What We’re Looking For

We want to highlight that not everybody has all the skills that match a job description. None of us did! We value diverse experiences and while having the desired qualifications make for a strong candidate, we encourage applicants with alternative experiences to also apply. Every qualified applicant will be considered within the employment process. We strive for a diverse, inclusive workplace environment. Here's more about our team's thinking on this topic.

• Experience designing and running large-scale, distributed systems.
• Strong knowledge of at least one backend language (Go, Java, Python, or .NET)
• Basic understanding of REST APIs and eagerness to learn how to design and build good ones.
• Familiarity with relational or document databases, and interest in learning more about building scalable systems.
• Curiosity about secure systems development (e.g., encryption, authentication, compliance).
• Interest in learning about financial systems, payments, or related domains (banking concepts like reconciliation, transactions, accounting are a plus, not a requirement).
• Enthusiasm for problem-solving and advocating for customer needs.