Back-End Engineer - Fintech/AI

Open Select; New York (NY); Hybrid; USD 171,000 - 209,000; Full time

Benefits offered by this job

Hybrid work model

100% paid health coverage

Unlimited PTO

Equity participation

Job summary

A leading FinTech company in New York City is seeking a Backend Engineer to design and scale cloud-native systems for a high-performance platform. You will collaborate with a talented team, building backend services and APIs using Python and C#. This role offers a hybrid work model and competitive benefits, including equity and comprehensive health coverage. Ideal candidates will have experience in high-growth environments and a strong foundation in AWS technologies.

Qualifications

• 3+ years building backend microservices in Python or C# at high-growth startups.
• Proven success scaling AWS infrastructure (EKS, Lambda, Kubernetes), event-driven systems, and databases.
• Strong knowledge of REST & gRPC best practices for performance and reliability.

Responsibilities

• Design and scale cloud-native systems for a high-performance platform.
• Build & optimize backend services & APIs using Python and C# on AWS.
• Collaborate cross-functionally to deliver features & scale post-Series A.

Skills

Building backend microservices

AWS infrastructure

REST & gRPC best practices

Python

C#

Event-driven systems

Databases (Postgres, DynamoDB)

Collaborative skills

Education

Degree from a top CS school or prestigious program

Tools

AWS (EKS, Lambda, Kubernetes)

Kafka

Job description

Backend Engineer - FinTech

Location: New York City (Hybrid)

Salary: Up to $190k + equity

Industry: FinTech / Financial Services

Who You’ll Join

A team of 9 engineers building a regulated brokerage platform democratizing access to institutional-grade strategies. They’re about to close what is poised to be the biggest non-AI pure Series A in the last 12 months. Backed by a16z & Sequoia, you’ll work with veterans from Goldman Sachs, Robinhood & Affiirm & technical leaders from Harvard & MIT. Leadership (including CEO & VP Eng) code daily in an ownership-first culture.

What You'll Drive

You’ll design and scale cloud-native systems for a high-performance platform handling millions of API calls, powering a regulated brokerage platform where investors and experts seamlessly share/execute strategies. You’ll lead architecture, ensure reliability at scale, and maintain compliance while supporting rapid growth post-Series A.

What You'll Focus On

• Build & optimize backend services & APIs using Python, C# on AWS (EKS, DynamoDB, Postgres, Kafka).
• Scale infrastructure for millions of transactions with low latency & high availability.
• Own end-to-end delivery of key components, ensuring seamless data flow.
• Adapt quickly to shifting priorities while balancing short-term needs & long-term scalability.
• Collaborate cross-functionally to deliver features & scale post-Series A.

Who You Are

• 3+ years building backend microservices in Python or C# at high-growth startups.
• Proven success scaling AWS infrastructure (EKS, Lambda, Kubernetes), event-driven systems (Kafka, SNS & SQS), and databases (Postgres & DynamoDB).
• Strong knowledge of REST & gRPC best practices for performance and reliability.
• Take initiative, ship code quickly, and thrive in a high-trust, flat culture.
• Experience working on rapidly scaling systems/teams through growth phases (Seed → Series A → Series B).
• Python-focused but adaptable, quickly mastering new tools & technologies.
• Degree from a top CS school or prestigious programs like Neo or VC Fellows.
• Experience or interest in FinTech/Financial Services and AI tools like Cursor, GitHub Copilot, and Claude.

Why You’ll Thrive Here

• Greenfield: Build new systems from scratch - no legacy code.
• Stability: Join a team with zero engineer turnover in 2+ years.
• Growth: Accelerated scaling of product & team fueled by Series A funding.
• Funding: Backed by $17M+ from top investors & angels (Uber & Robinhood leaders).
• Benefits: Hybrid work, 100% paid health coverage, unlimited PTO, and equity (top 75% tier for companies at this stage).

This role is open to US citizens and Green Card holders only.