Staff Engineer

Rain; Porto; Remote; EUR 120,000 - 180,000; Full time

Job summary

Rain is seeking a Staff Backend Engineer to drive technical direction for the backend platform. The role focuses on API integrations with 3rd-party vendors and core systems at the intersection of banking, payroll, and timekeeping.

You will design and implement reliable distributed micro-services, RESTful APIs, and scalable data models while mentoring engineers and aligning engineering practices with business goals. This is a remote role supporting the EMEA region.

Qualifications

• 8+ years of professional experience as an engineer, with a staff or principal level track record.
• Extensive experience designing and building fintech products from concept to scale.
• Strong system design skills and ability to balance speed with long-term health.
• Ownership of large, ambiguous initiatives from concept to completion with proactive problem solving.
• Excellent cross-functional collaboration and communication abilities.

Responsibilities

• Set technical direction and architecture for major backend areas, translating goals into scalable strategy.
• Design and implement reliable systems in a distributed micro-services architecture.
• Build and maintain integrations with 3rd-party vendors and partners.
• Design and implement highly available RESTful APIs for web and mobile apps.
• Establish reusable patterns and libraries to accelerate future product development.
• Enforce observability with logging, metrics, and alerting systems.
• Create and maintain architecture/API/workflow documentation.
• Continuously monitor systems for performance and scalability improvements.
• Mentor engineers and raise the technical bar across the team.

Skills

Go

Python

RESTful APIs

System design

Distributed systems

Tools

Kafka

RabbitMQ

Flink

Docker

Kubernetes

AWS

Azure

GCP

GitLab CI

GitHub Actions

Job description

Rain is the world's first AI Financial Health Platform, serving 3.5 million employees at leading organizations like McDonald's, Marriott, and T-Mobile. Rain works in the background to optimize every employee's financial life to prevent shortfalls and build long-term stability. Backed by top investors including QED and Prosus, Rain has raised $150M in venture funding to fuel our next stage of hyper growth.

About The User Tribe

We are looking for a Staff Backend Engineer in EMEA. This position is remote. As a senior technical leader on the team, you will set the technical direction for major areas of our backend platform, including API integrations with 3rd-party vendors and partners, and the core systems that sit at the intersection of the banking, payroll, and timekeeping domains.

This is a rare opportunity to build the foundations of a whole new set of personal financial health products. You will shape the architecture, set the engineering bar, and lead the efforts that help users maintain positive cash availability and take control of their financial lives. Working closely with our international product and engineering teams, you will operate in a fast-paced environment where strong system design judgment and the ability to move quickly without sacrificing reliability are essential.

Our ideal candidate is excited to tackle the toughest technical challenges, drive strategic thinking across the organization, and bring extensive experience designing and building novel fintech products from the ground up.

What You’ll Do

• Set technical direction and architecture for major areas of the backend platform, translating ambiguous product goals into robust, scalable technical strategy
• Design and implement reliable systems and applications in a fully distributed micro‑services architecture, leading by example on engineering quality
• Build and maintain integrations with 3rd‑party vendors and partners
• Design and implement highly available RESTful APIs supporting user‑facing web and mobile applications
• Establish reusable patterns, frameworks, and libraries that ensure scalability and accelerate future product development
• Enforce observability best practices, leveraging tools like logging, metrics, and alerting systems
• Create and maintain detailed technical documentation (architecture designs, APIs, workflows, and system configurations)
• Continuously monitor systems for opportunities to maximize performance and scalability
• Mentor engineers and raise the technical bar across the team

Who You Are

• You have at least 8 years of professional experience as an engineer, with a track record of operating at a staff or principal level
• You have extensive experience designing and building novel fintech products, ideally from concept to scale
• You have strong system design skills and thrive in a fast-paced environment, balancing speed with long-term technical health
• You have a strong ability to take ownership of large, ambiguous initiatives, driving them from concept to completion while proactively identifying challenges and solutions
• You have excellent cross‑functional collaboration and communication skills, and can influence decisions across teams
• You're deeply familiar with complex large scale distributed systems

Required Technical Qualifications

• Proficient in backend languages: Go/Golang, Python
• Strong expertise in designing and developing RESTful APIs
• Expertise in SQL and NoSQL database technologies, including data model design and optimization
• Proven experience building reliable and scalable user‑facing applications
• Proficiency in message queuing systems such as Kafka (preferred), RabbitMQ, or Flink
• Familiarity with Cloud technologies: AWS/Azure/GCP, serverless, Docker, Kubernetes, ECS among others
• Effective release management experience for ensuring zero downtime and experience with CI/CD frameworks such as Gitlab CI and Github actions

Diversity, Equity and Inclusion Commitments

As part of our dedication to the diversity of our workforce, Rain is committed to Equal Employment Opportunity and does not discriminate based on race, religion, color, national origin, ethnicity, gender, sex (including pregnancy), protected veteran status, age, disability, sexual orientation, gender identity, gender expression, or any unlawful criterion existing under applicable federal, state, or local laws. If you need assistance or accommodation due to a disability, you may contact us at [e-mail].

What’s Next

Ensuring a smooth and enjoyable candidate experience is critical for us. Our interview process tends to take about 4 weeks to complete, but may fluctuate depending on the role. Learn more about our hiring process here. Don’t be afraid to let us know if you need more flexibility.