Join us as a Backend Department Lead and drive the technical direction and development of the backend platform behind one of the fastest-growing AI products in the US market.

We are looking for a strong technical leader who combines deep expertise in high-load system architecture with hands-on engineering leadership and experience in building and developing high-performing backend teams. In this role, you will have real technical ownership of our AI Gateway, generative pipelines, and mission-critical backend services powering a product already used by more than 2 million people.

About Us

Zeely is the agentic AI platform for creating, launching, and scaling paid ads.

Simply put: we've made the best AI solutions and marketing tools available to small and medium businesses — tools that used to be reserved for big brands with expensive marketing teams.

The next big step: a B2B solution for large marketing teams and enterprise clients — workflows, creative analytics, and full control over campaigns across the whole team. For companies where performance marketing already runs at scale and needs more efficiency and automation.

A few numbers that speak for themselves

4 years on the market — a stable, profitable company backed by international investors;

6× growth over the past year;

2,000,000+ businesses already use Zeely;

#1 in its category in the US market;

200+ specialists on the team;

Markets: US + worldwide.

Your Key Responsibilities

Lead the Backend Department and set the technical direction for a team of 15+ backend engineers;

Own backend architecture and drive key technical decisions around scalability, reliability, performance, and system design;

Lead the evolution of our AI Gateway — the core platform layer powering text, image, voice, avatar, and video generation across multiple AI models and providers;

Design and evolve AI orchestration pipelines, optimizing routing, fallback strategies, generation quality, latency, and cost;

Scale backend services and infrastructure to support growing product traffic and increasingly complex workloads;

Drive engineering excellence across code quality, architecture, security, observability, testing, and operational reliability;

Lead strategic backend and AI initiatives, including our proprietary RAG pipeline, MCP integrations, and AI agent capabilities;

Stay hands-on with architecture, design reviews, code reviews, troubleshooting, and technically complex initiatives;

Grow the backend team through mentoring, performance management, technical development, hiring, and strong engineering practices;

Collaborate closely with Frontend, Mobile, QA, AI Engineering, DevOps, and Product teams to translate business goals into scalable technical solutions;

Partner with the Principal Engineer on infrastructure strategy, capacity planning, reliability, and cost optimization.

What We Are Looking For

7+ years of commercial backend development experience with Node.js;

3+ years in a technical leadership role such as Backend Lead, Team Lead, or Engineering Lead;

Experience leading and developing backend engineers, including mentoring and performance management;

3+ years of hands-on production experience with NestJS;

Strong system design skills and proven experience designing and evolving microservice and distributed architectures;

Experience building and scaling high-load production systems;

Deep expertise in PostgreSQL and Redis, including performance optimization, data modeling, and caching strategies;

Experience with ORMs such as Prisma and Drizzle;

Hands-on experience with AWS, including EKS, RDS, SQS, S3, CloudWatch, and OpenSearch;

Strong practical knowledge of Docker and containerized environments;

Strong understanding of reliability, observability, monitoring, incident management, and on-call practices;

Ability to balance architectural strategy with hands-on engineering and pragmatic delivery;

Upper-Intermediate English or higher.

Nice To Have

Active AWS Solutions Architect or Developer certification;

Experience with Terraform or other Infrastructure as Code tools;