Senior Backend Engineer

Dsstream; Warszawa; On-site; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Collaboration with experienced specialists

Adequate salary based on skills

Opportunity for further development

Job summary

A cloud technology company in Warsaw is looking for an experienced Senior Backend Engineer specializing in Python (FastAPI) or Go (Gin). The ideal candidate should have at least 5 years of commercial experience, especially in building scalable backend systems on AWS. You will design and develop APIs while working closely with AI and product teams to enhance the Voice AI platform. The role offers a competitive salary and opportunities for professional development.

Qualifications

• Minimum of 5 years of commercial experience as a backend engineer/software engineer.
• Very good knowledge of Python (FastAPI) or Go (Gin).
• Experience working with AWS services including API Gateway, Lambda, ECS/Fargate.
• Ability to collaborate with AI/product teams in a cloud environment.
• Ability to design data models and work with real-time data processing systems.
• Able to collaborate with AI/product teams in an enterprise cloud environment.

Responsibilities

• Design and develop the backend layer for the Voice AI platform on AWS.
• Implement APIs using AWS API Gateway and AWS Lambda.
• Create and maintain data processing pipelines with AWS services.
• Design data layer with Redis, DynamoDB, S3+CloudFront, and Redshift.
• Create real-time data pipelines with Kinesis and AWS Glue for analytics.
• Collaborate with AI/product teams and integrate with the AI/LLM layer on AWS.

Skills

Python (FastAPI)

Go (Gin)

AWS services

REST API design

Serverless architecture

Containerization (Docker)

Real-time data processing

Tools

AWS Lambda

API Gateway

ECS/Fargate

DynamoDB

Redis (ElastiCache)

S3/CloudFront

Kinesis/Glue

Job description

We are looking for an experienced Senior Backend Engineer (Python/Go, AWS) with at least 5 years of commercial experience in building cloud-based backend solutions.

Scope of responsibilities

• Design and development of the backend layer for the Voice AI platform running entirely on AWS.
• Implementing and maintaining APIs using AWS API Gateway and AWS Lambda, with Python (FastAPI) and Go (Gin).
• Building and maintaining container-based environments with AWS Fargate and Amazon ECS, including handling long‑lived connections and minimizing cold starts.
• Designing and developing the data layer using Amazon ElastiCache for Redis, Amazon DynamoDB, Amazon S3 + CloudFront, and Amazon Redshift.
• Creating and maintaining real‑time data processing pipelines with Amazon Kinesis Data Streams and AWS Glue for conversation analytics and lead generation.
• Integrating the backend with the AI/LLM layer on AWS and collaborating with product and AI teams.

Requirements

• Minimum of 5 years of commercial experience as a backend engineer / software engineer.
• Very good knowledge of Python (FastAPI) or Go (Gin) and REST API design.
• Experience working with AWS services, in particular API Gateway, Lambda, ECS/Fargate, S3, DynamoDB, ElastiCache (Redis), Redshift, Kinesis, and Glue.
• Practical experience with serverless architecture and containerization (Docker) and with building scalable, low‑latency backend systems.
• Experience in designing and optimizing data models and working with real‑time data processing systems.
• Ability to collaborate with AI/product teams and work in an enterprise‑grade cloud environment.

We offer

• Collaboration with experienced specialists (backend, infrastructure, AI)
• Salary adequate to skills
• Opportunity for further development and feature expansion

Join us today

To apply, please submit your resume and cover letter to [e-mail]. We appreciate your interest and will contact you regarding your application.

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