Senior Full-Stack Engineer (Data Platform & Tooling)

Location: Serbia, Croatia, North Macedonia, Romania, Poland

Department: Dev

Workplace: remote

Employment Type: full

Description

Role: Senior Full Stack Developer (Web & Mobile App)
Hours: 9am - 5pm Eastern Standard Time
USD Monthly Rate: Negotiable based on experience

We're hiring a skilled Full-Stack Developer to lead the build of our platform: ideal candidate will help building reliable pipelines from messy external sources, working alongside our team to create something fast, scalable, and truly useful.

If you enjoy building complex products from scratch and having full autonomy, as well as end-to-end project ownership - you'll love this project!

Responsibilities

• Build and maintain both web and mobile versions of the platform
• Set up the backend, APIs, and database architecture for performance and scale
• Translate UI designs into responsive, high-quality builds
• Integrate with third-party tools and external data sources
• Handle deployment, testing, and performance optimization
  

Requirements

Mandatory qualifications:

• 5+ years building production systems in Python
• Strong SQL & database design — schema design, query optimization, data modeling
• ETL/data pipeline experience is a must
• Web scraping expertise — browser automation, API reverse-engineering, anti-bot handling, rate limiting.
• Self-initiative and goal-driven approach
• Pragmatic approach to coding: good balance between insisting on clean code and fast deliverables
• Open mindset — willing to learn new domains, change approach when data says so
• Prior experience in a small team / startup environment (under 20 people)

Preferred qualifications:

• E-commerce or marketplace data experience (Amazon, Keepa, SP-API)
• Frontend capability — dashboards, internal tools, reports
• Experience with caching strategies, incremental data updates, API token budgeting
• Familiarity with cloud deployment (AWS/GCP)
• Data validation & QA mindset — catches edge cases before production

Benefits

• Remote Work Flexibility – Work from anywhere while staying connected with a high-performing team.
• Career Growth Opportunities – Expand your expertise in digital marketing and client management.
• Supportive Team Culture – Collaborate with passionate professionals who value teamwork and innovation.

As part of our recruitment process, all candidates are kindly asked to read, understand, and agree to Lago’s Confidentiality and Non-Circumvention Agreement. This ensures a respectful and professional experience for everyone involved.