Senior Software Engineer- Growing Fin-Tech start up

Saragossa; Berkeley Heights (NJ); On-site; USD 200,000 - 220,000; Full time

Job summary

A FinTech startup is seeking a Senior Backend Engineer to help build the technology foundation for their platform. You will design and develop scalable backend services using Java and Spring Boot, and optimize PostgreSQL data models. The role requires collaboration across teams and offers competitive compensation up to $220,000, with potential equity. This is a great opportunity to influence the architecture and work closely with a skilled team in a growing digital platform.

Qualifications

• 5+ years of experience in backend development, especially with Java and Spring Boot.
• Strong understanding of database architecture, specifically PostgreSQL.
• Experience with containerization using Docker.

Responsibilities

• Design and develop scalable backend services.
• Architect and optimize data models and workflows.
• Build and deploy containerized services.

Skills

Java

Spring Boot

PostgreSQL

Docker

Event-driven workflows

Job description

Most FinTech startups struggle with outdated systems and fragmented workflows. But this is different.

Here you will help build the technology foundation for a platform that is transforming how investment funds and private markets investors manage workflows, data, and reporting. You will play a key role in shaping the backend systems that power a growing digital platform used by institutional clients.

You’ll work closely with leadership and the technical team to design and build scalable systems that support a fast-growing business.

Expect to work across teams:

• Design and develop scalable backend services using Java and Spring Boot
• Architect and optimize PostgreSQL data models and event-driven workflows
• Build and deploy containerized services using Docker
• Translate high-level product goals into technical solutions
• Help improve system reliability, performance, and scalability

This role is ideal for a Senior Backend Engineer who enjoys taking ownership and working in environments where requirements evolve. You’ll collaborate closely with the Tech Lead to research solutions, propose architecture, and deliver production-ready systems.

They are looking for someone who is comfortable working independently, mentoring engineers, and contributing to technical direction while remaining hands-on with coding and system design.

The company is building a private markets operating platform designed to streamline workflows and create a better digital experience for investors. The team is still early in its growth, which means engineers have meaningful influence over architecture and engineering practices.

The founder and leadership team have strong industry experience and are focused on building a long-term platform with modern infrastructure and scalable technology.

Competitive compensation up to $220,000 base with the potential for equity down the line.

If you're interested in helping shape the backend architecture of a fast-growing FinTech platform, this could be a great opportunity to get involved early.