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Sr. Backend Engineer (Remote)

Modemobile

Remote · US

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About this role

Who We Are ( Mode.Inc )

Mode.Inc is the parent company of a portfolio of technology businesses, including Mode Mobile, the creator of EarnOS, a transformational software platform that turns ordinary smartphones into "EarnPhones". This innovation empowers users worldwide to monetize everyday mobile activities such as streaming, gaming, and shopping. We enable users to profit from their data and attention, rather than letting only tech giants benefit. What sets us apart is our inclusive approach, converting users into earners, facilitating over $150M in earnings and savings, and going a step further by turning earners into owners by awarding stock ownership in Mode.Inc based on their usage. We have attracted over 40 million users across 170 countries.

Mode Mobile, Inc. Ranked Number 1 Fastest Growing Company in North America on the 2023 Deloitte Technology Fast 500.

For additional insights, check out information about our reward-based super app, Mode Earn App, which also powers the reward engine for our proprietary smartphone, Mode Earn Phone.

Our Team and Culture Drive Our Success

Our team is the heart of our culture. We value innovation, collaboration, and curiosity, with a passion for getting things done. We strive to hire and cultivate the best team members and foster a culture of open communication and transparency. We are driven and hard-working but also committed to having fun along the way. We allow OKRs to guide us, assume positive intent, sometimes agree to disagree and commit, honor our commitments, seek to accomplish more with less, and encourage everyone to speak up as our team owns our company’s success.

You can read more about our team and how we work here .

The Role

We’re looking for an exceptional Sr. Backend Engineer to help build, scale, and evolve the backend systems powering our consumer-facing mobile products. You’ll architect reliable services, increase speed and resilience, optimize infrastructure, and unlock new features that help users achieve goals and earn points more effectively. You’ll architect reliable services, increase speed and resilience, optimize infrastructure, and unlock new features that help users achieve goals and earn points more effectively.

This is a hands-on, high-impact role ideal for someone who loves solving complex systems problems, building scalable APIs, and shipping features that directly impact product performance and user experience.

You will collaborate closely with product, design, data, and frontend engineering to deliver features through rapid development cycles and deployment.

Who You Are and What You’ll Do

• Build & Scale Core Services

• Architect backend systems powering user workflows, notifications, and automation features

• Design APIs and microservices built for performance, efficiency, and scale

• Quickly learn and apply new technologies as needed

• Work with high-volume data systems and event-driven architectures

• Improve observability, monitoring, logging, testing, and alerting

• Identify performance bottlenecks and implement optimization strategies

• Build distributed systems with multiple services, queues, external APIs, and asynchronous data flows

• Ensure uptime, stability, and production resilience

• Build resilient integrations with third-party services

• Work in 2-week sprints with CI/CD and strong code quality practices

• Partner with product, data, and frontend to ship features

• Participate in system design and architecture reviews

What You Bring to the Team

• 6+ years of backend engineering experience, ideally in consumer apps, mobile, or SaaS, with at least 2 years in a senior-level role

• Expert-level proficiency in Ruby on Rails, including modern versions and best practices (this is central to the role)

• Hands-on production experience with PostgreSQL, including schema design, indexing strategies, query optimization, and performance tuning

• Strong expertise with Sidekiq for background job processing, including scheduling, throttling, batching, and reliability patterns

• Proficiency using Redis for caching, job queues, and distributed locking

• Experience with DynamoDB or comparable NoSQL databases

• Solid background in API design, RESTful principles, versioning, and serialization

• Proven track record of integrating with third-party APIs and external services

• Experience designing, building, and scaling distributed systems in production

• Familiarity with AWS services, including S3, DynamoDB, SQS, CloudWatch, and SES

• Strong skills in testing, CI/CD pipelines, logging/monitoring, debugging, and performance optimization

• Ability to work in a fast-moving remote startup environment

• Preferred

• Experience building and supporting backends for mobile apps

• Experience creating internal tools or admin panels with ActiveAdmin

• Hands-on work with Shoryuken for SQS message processing

• Experience integrating payment processors like Stripe

• Nice to Have :

• Event-driven or streaming architecture

• AI-assisted/AI agentic development (GitHub Copilot, Cursor, Claude Code, Codex, etc.)

• Feature flagging, experimentation, or A/B testing

• Alignment with our core values:

• Accountable : You take ownership of your responsibilities, demonstrating trustworthiness and self-discipline. You are consistent in your work, transparent in your actions, and communicate effectively. You follow through on commitments and strive for continuous improvement.

• Action-driven : Identify what is most important, agree on scope, execute in a timely manner, and drive the greatest impact. You take initiative, roll up your sleeves, and get things done.

• Caring : You genuinely care about yourself and others, our business and craft, our mission and vision, and are passionate in heart and mind. You understand the importance of our team and strive to create a positive, supportive work environment.

• Curious : You focus on the ‘why,’ learn and expand your knowledge, explore new ideas, and gene

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