About CONXAI

CONXAI has built a no-code, agentic AI platform for the Architecture, Engineering and Construction (AEC) and physical industries, focused on knowledge-automation. We automate high-stakes, knowledge-intensive workflows traditionally trapped in siloed data, fragmented tools and tacit (undocumented) human expertise.

Our multi-agent systems perform complex reasoning in the physical world; and transform bespoke, service-heavy processes into scalable Service-as-a-Software automation.

CONXAI is trusted by some of the leading AEC companies in Europe, US, LATAM and Japan.

Your Role

As a Senior Backend Engineer, you will play a key role in designing and evolving the backend architecture that powers a complex B2B AI platform. Our backend services process large volumes of structured and unstructured data, orchestrate AI workflows, and expose reliable APIs for both internal services and customer-facing applications.

You will focus on building high-performance distributed systems that are reliable, scalable, and designed for long-term evolution.

This role is ideal for someone who:

- Takes ownership of backend architecture and system reliability

- Thinks in terms of distributed systems, concurrency, and scalability

- Designs clean service boundaries and well-structured APIs

- Values maintainable, production-grade code

- Enjoys collaborating with frontend, ML and platform teams

Our Tech Stack

- Golang (primary backend language for core services)

- Python, TypeScript / NestJS (supporting services)

- PostgreSQL, MongoDB (AWS DocumentDB)

- REST APIs

- Docker & Kubernetes (EKS)

- AWS Cloud (S3, Cognito, compute services)

- CI/CD pipelines and automated deployments

What You’ll Do

Architect & Build Scalable Backend Systems

- Design and develop backend services primarily using Golang

- Build scalable APIs and backend services that power AI-driven workflows

- Design systems capable of processing large-scale datasets across multiple tenants

- Develop high-performance services leveraging Go’s concurrency model

- Define clear service boundaries and maintain robust API contracts

- Contribute to architectural decisions for distributed backend systems

Deliver High-Quality Backend Code

- Write production-grade backend services in Go

- Design and implement RESTful APIs for internal and external integrations

- Ensure reliability through testing, monitoring, and observability

- Optimize system performance, latency, and resource usage

- Debug and resolve complex production issues

Work with Cloud Infrastructure

- Develop and deploy services using AWS cloud infrastructure

- Work with Docker and Kubernetes (EKS) to run and manage distributed services

- Utilize AWS services for storage, authentication, and compute workloads

- Collaborate with DevOps and platform teams to maintain reliable CI/CD pipelines

Collaborate Across Teams

- Work closely with frontend engineers, ML engineers, and product teams

- Support integration of AI capabilities into backend systems

- Participate in architecture discussions and technical planning

- Conduct thoughtful code reviews and mentor junior engineers

What We’re Looking For

Must Haves

- 5+ years of professional backend development experience

- Strong experience with Golang

- Experience in designing scalable backend systems and APIs

- Strong understanding of distributed systems and microservice architecture

- Experience in working with AWS cloud infrastructure

- Experience in working with relational databases and SQL

- Strong debugging, system design, and problem-solving skills

- Strong written and verbal English communication skills

Highly Valued

- Experience in building complex B2B SaaS platforms

- Experience with Kubernetes and container orchestration

- Experience in designing systems for large-scale data processing

- Experience working on AI or data-intensive platforms

Nice to Have

- Experience with Python or TypeScript (NestJS)

- Experience with event-driven architectures

- Experience integrating AI/ML services into backend systems

- Experience in AEC, construction, or infrastructure domains

Why CONXAI

- Edge of Innovation: Be at the absolute forefront of AI in the construction tech space

- High Impact: Build core infrastructure powering real-world AI automation used by global companies

- Top-Tier Peer Group: Work with a global team of ML engineers, software engineers and industry practitioners

- Growth Opportunities: Join a fast-growing company where engineering decisions directly shape the future of the platform