Backend Engineer (Scala) - Remote

TN United Kingdom; London; Remote; GBP 60,000 - 80,000; Full time

Job summary

A leading company in AI is seeking a skilled developer to enhance their empathetic AI platform. You will work on server-side development, collaborate with mobile teams, and contribute to innovative AI solutions. The role offers competitive salary and growth opportunities.

Benefits

Competitive salary based on experience

Opportunity to build impactful AI products

Global offsite meetings

Qualifications

• Experience with Scala or Java/Kotlin.
• Proactive mindset and excellent leadership skills.

Responsibilities

• Develop and maintain the server-side of a web service.
• Design and implement features and APIs.
• Integrate new LLM microservices with AI team.

Skills

Scala

Python

Leadership

Communication

Education

English B2+

Job description

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Client:

Location:

London, United Kingdom

Job Category:

-

EU work permit required:

Yes

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Job Reference:

e76e505d12c2

Job Views:

3

Posted:

14.05.2025

Expiry Date:

28.06.2025

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Job Description:

An AI companion who is eager to learn and would love to see the world through your eyes. Replika is always ready to chat when you need an empathetic friend.

About Replika

Replika is hands down one of the most exciting forces in AI and tech today. Think: 4,000+ feature articles in the past year, TED Talks with our founder, studies from Stanford and Harvard, Lex Fridman podcast inclusion, and a Quartz founder story. We’re the only empathetic AI out there, making sure all 35M+ users feel seen, heard, and understood—whatever that means for them. So yes, we’re a bit like a future Samantha from Her, but even more powerful and in the palm of your hand. And most importantly, Replika cares for you.

Since 2016, we’ve been redefining conversational AI across iOS, Android, web, and VR. Our AI companions take many forms—holograms, AR/VR avatars, even robots. The ultimate AI life assistant, mentor, therapist, friend. Whatever you need, really, Replika is there for you. Right now, we’re rebranding with one of the world’s top design agencies, scaling our global team, and pushing human-AI connection further than ever. We’re the humanists in AI. And we’re making sure it’s done right.

What you’ll do

• Develop and maintain the server-side of a web service from all sides
• Design and implement features and APIs in collaboration with mobile client teams
• Work closely with growth and marketing teams on payment and feature experiments
• Build data pipelines for the analytics team
• Integrate new LLM microservices with AI team
• Set up metrics, monitors and alerts to ensure service stability

Technical skills

• Experience with Scala (or quick to switch if you’re already skilled in Java/Kotlin).
• Familiarity with Python for ad-hoc tasks is a plus.
• Can self-manage and drive tasks end-to-end.
• Proactive mindset: you take initiative and ensure tasks are fully executed.
• Thrive in a fast-paced environment and maintain a positive outlook.
• Commitment to shipping features and solving problems deeply.
• Genuine interest in AI, your teammates’ work, and the company mission.
• Excellent leadership and communication skills—big decisions, big responsibility.
• English B2+ (or higher) to communicate smoothly with the global team.

Nice to have

• Experience with platform APIs (Facebook, Stripe, etc.) and payment systems.
• Proven experience with mobile apps (200K+ MAU is a bonus).

What we offer

• Competitive salary based on your experience and skill set
• Opportunity to build an AI product that deeply impacts users
• Expect to work some European hours, as the team is in Europe. Potential visa support is available
• Global offsite meetings, including gatherings in San Francisco

At Replika, growth isn’t a maybe—it’s built in. Do the work. Deliver. One great project could double your salary. Seriously. Who do we think we are? Replika. We move fast. Very. Join us at the forefront of emotional AI.