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Backend Engineer
Rain · New York, NY
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What Rain asks for
From Rain's Backend Engineer ad, checked 4 Nov 2026.
NodeJS and backend technologies
Practical experience building with NodeJS and other backend tools to maintain and update the server side of a product.
Global infrastructure scaling
Scaling technical systems to support millions of users worldwide and helping choose how the product is structured as it grows.
Smart contracts and blockchains
Experience or interest in working with blockchain technology and smart contracts across different networks.
Fintech and card experience
Background in financial technology, specifically with digital banks or the process of issuing payment cards.
Side projects and experimentation
A history of building things, experimenting with new ideas, and shipping side projects.
The ad asks for 2 to 10 or more years of experience. The position is listed in New York, NY, with support for flexible and home based work.
How the example answers the ad
Four of the five requirements above, each matched to a line in the example.
NodeJS and backend technologies
“Refactored legacy server-side codebases in NodeJS to improve deployment speed by 40 percent.”
Updating legacy code using NodeJS to achieve 40 percent faster deployments shows the required practical experience with backend technologies.
Global infrastructure scaling
“Scaled global payment gateway infrastructure to support 2 million concurrent active users with sub-50ms latency.”
Supporting 2 million concurrent users on a global scale through infrastructure improvements shows the ability to scale systems for millions of people worldwide.
Smart contracts and blockchains
“Built smart contract interaction layers to enable seamless asset swaps on secondary blockchain networks.”
Building interaction layers for asset swaps across different networks shows direct experience with smart contracts and blockchain technology.
Fintech and card experience
“Developed core NodeJS services to automate compliance checks for international fiat-to-crypto transfers.”
Automating compliance for international fiat and crypto transfers shows a professional background in financial technology.
The whole example as text
Tomasz Kowalski · Senior Backend Engineer
Summary
Backend engineer with 6 years of experience building high-scale financial and distributed systems. Develops microservices using NodeJS and Go to support multi-million user transaction volumes. Integrates complex banking APIs and blockchain indexing services into production payment architecture. Optimizes hardware-level communication layers for AI-driven data processing units.
Experience
Senior Backend Engineer · Stripe
San Francisco, CA · 2025 - Present
- Scaled global payment gateway infrastructure to support 2 million concurrent active users with sub-50ms latency.
- Engineered a high-throughput transaction pipeline using Go, reducing service overhead by 30 percent.
- Integrated third-party banking APIs to support five new regional currencies across European markets.
- Refactored legacy server-side codebases in NodeJS to improve deployment speed by 40 percent.
- Led cross-functional design reviews to ensure system reliability during record-breaking traffic events.
Backend Infrastructure Engineer · NVIDIA
Santa Clara, CA · 2023 - 2025
- Developed backend firmware interfaces for next-generation AI processing chips to enable faster model training.
- Optimized data streaming protocols resulting in a 25 percent increase in GPU cluster utilization.
- Collaborated with hardware architects to resolve bottlenecks in memory access patterns for edge devices.
- Automated deployment testing pipelines to ensure software stability across heterogeneous hardware environments.
- Authored documentation for internal SDKs used by 50 plus engineering teams across the organization.
Software Engineer · Coinbase
San Francisco, CA · 2022 - 2023
- Built smart contract interaction layers to enable seamless asset swaps on secondary blockchain networks.
- Maintained open-source indexing libraries that processed over 5 million blockchain events daily.
- Reduced database query latency for digital wallet balances by implementing a custom caching layer.
- Migrated monolith services to a containerized microservices architecture using Kubernetes and Docker.
- Mentored junior developers on secure coding practices for handling sensitive financial transaction data.
Junior Backend Developer · Ripple
San Francisco, CA · 2020 - 2022
- Developed core NodeJS services to automate compliance checks for international fiat-to-crypto transfers.
- Performed unit and integration testing that increased overall test coverage from 60 to 90 percent.
- Assisted in the transition of cloud infrastructure from manual provisioning to Infrastructure as Code.
- Resolved critical bugs in payment settlement logic that resulted in 99.99 percent transaction uptime.
- Participated in agile ceremonies and improved sprint velocity by documenting technical debt effectively.
Education
Master of Science in Computer Science · Stanford University
Stanford, CA · 2022 - 2024
- Specialized in distributed systems and advanced database management architectures.
- Completed thesis on low-latency synchronization protocols for decentralized ledgers.
- Graduated with 3.9 GPA and received the Departmental Research Excellence Award.
Bachelor of Science in Computer Engineering · University of California, Berkeley
Berkeley, CA · 2016 - 2020
- Focused coursework on digital circuit design and embedded software systems.
- Participated in the Honors Research Program focusing on GPU-accelerated computing.
- Maintained 3.8 GPA while leading the campus open-source development collective.
Skills
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Frequently asked questions
Is the example from an employee?
No. It is an AI-written example for this ad, made to show how a resume can answer it.
Is this role remote?
The ad supports a flexible workplace. You can work from home, work from an office, or combine both approaches based on where you are most productive.
What is the team structure like?
Rain uses an open and flat structure where team members at every level can explore their own ideas and influence the company vision.
Where do I apply?
On the official Rain posting, through the job link on this page.
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