We are looking for a Senior Fullstack Engineer to join our Payments team. This team owns everything related to payment infrastructure inside FunnelFox: checkout flows, payment provider integrations, and the systems that make payments reliable, scalable, and adaptable for our clients.

This is a highly autonomous role in a fast-moving startup environment. You will work on complex integration-heavy problems, collaborate closely with product and engineering, and help shape technical solutions in areas where requirements are often evolving rather than perfectly predefined.

In this role, you will:
- Build and improve integrations with payment service providers (PSPs) and external payment systems.
- Work on checkout infrastructure, payment flows, and backend reliability.
- Design and maintain backend logic for integrations, async processes, webhooks, and related systems.
- Participate in technical discovery and decomposition of business requirements.
- Collaborate closely with Product, Support, and Engineering on shaping solutions, not just implementing tickets.




- Investigate and resolve production and payment-related issues.
- Contribute to improving internal engineering quality, reliability, and scalability across the payments domain.
- Work in an environment with high ownership, evolving priorities, and a strong focus on practical impact.

You will be a great fit, if you have:
- Strong backend engineering experience.
- Solid experience with payment systems, PSPs, or external integrations.
- Experience working with APIs, webhooks, async flows, and integration-heavy architectures.
- Good understanding of distributed systems and backend scalability challenges.
- Experience working in startup or fast-changing environments.
- Ability to work autonomously and navigate partially defined requirements.
- Strong ownership mindset and pragmatic engineering judgment.
- Ability to communicate clearly and collaborate cross-functionally.

Nice to have:
- Experience with Go.
- Experie

📌 Fullstack Engineer (India)
🏢 Adapty Solutions
📍 India