Senior Backend Engineer

We believe generative AI’s true potential goes beyond improving interactions between humans and machines; it’s set to revolutionize human-to-human communication. We’re introducing a smarter way to communicate that will help us tap into our most original creations, together with our people.

Interface, Inc. is founded by the same minds behind Jour, which was , and new talents equally committed to our mission. We’re a small team of 30 today.

At Interface, we thrive in building beautiful products, used and loved by millions. We design with the user at the forefront – going beyond mere functionality to create magical experiences. We’re obsessed with pixel-perfect delivery, high daily usage, and world-class retention. These principles steer our behaviors, decision-making, and set our leadership expectations. In our team, transparent communication, deep ownership, and high velocity are lived values. Joining Heart Hands means becoming part of a track-proven team focused on cutting-edge products, backed by top-tier investors. We offer an ecosystem where you can grow both your individual contribution and strategic thinking.

As a Senior Backend Engineer, you will play a critical role having complete ownership in the design, development, and implementation of a robust and scalable backend & infrastructure used by our mobile clients, but also in supporting the development of our second brain. You will make a significant impact on shaping the services and features that will bring our product to life and will be used by millions.

• Write simple, high quality code that can easily be understood and leveraged by others

• Lead full life cycle design & implementation of product requirements, which includes task break-down, delivering, testing, and maintenance

• Collaborate closely with the product and the rest of the engineering team to transform product and feature specifications into a reality (we ship on a daily basis).

• You have strong knowledge, solid understanding, and interest in the following areas:

  • Minimum 5 years professional experience in a backend language (preferably Golang). Interest in Rust is a plus.

  • Programming, architecture, database design, and operations skills

  • Scaling a distributed system & the corresponding constraints and trade-offs of operating at scale

  • Familiarity designing event-driven architected backend (message queues, event streaming)

  • Asynchronous processing, concurrency, parallelism

  • Solid grasp of how gRPC, HTTP, TCP, UDP work ? Strong believer of CI/CD (Docker, GitHub Actions, AWS Fargate)

  • Observability tools, monitoring, alerting (Datadog, Grafana, Prometheus)

• You’re a self-starter who can quickly roll out quality code and build out simple systems

• You have experience working in a fast paced startup environment

• You are are excited by the prospect of working on an AI product

• You’re humble and biased to action, with a “no task is too small” mindset

• You are able to adapt and thrive with an early stage team while navigating the unknown

• You think like an owner and can prioritize what’s best for the company

• You like to keep things simple and not get too caught up in the weeds

• You like to be challenged and see this role as a growth opportunity

• Being nice matters to you, and you’re a self-proclaimed champion

• You have Advanced english skills.

1. Silver.dev Recruiter Screen

2. Silver.dev Technical Screen

3. Cultural Screening with People Lead

4. Technical Deep Dive Screening with CTO

5. Take-home Challenge

6. Take-home Challenge Review Call with Engineering Team

7. Behavioral Screening with CEO