Senior Backend Tech Lead — Golang, MySQL & CRM Ops

ABC Financial; Poland; On-site; PLN 265,000 - 275,000; Full time

Benefits offered by this job

Open PTO

Parental & Pawternity Leave

Fitness Perk

Discounts

Medical/Dental/Vision

Calm App

Job summary

ABC Fitness in Poland is seeking an experienced backend engineer to design and develop scalable Golang services, write and optimize complex SQL queries, and handle large datasets for our CRM and XLerate platforms.

You will lead a small team of 2–3 engineers, collaborate with product and QA, and help set technical direction while contributing to high-impact projects across the CRM ecosystem.

Qualifications

• Bachelor’s degree in Computer Science or relevant field preferred, 5+ years of experience with a general-purpose programming language (Go preferred).
• Proven experience owning complex backend features or services; prior lead/senior ownership preferred.
• Solid understanding of agile development methods in an Agile/Lean/Continuous Delivery environment.
• Knowledge of modern Quality and Testing principles.
• Strong written and verbal communication; comfortable leading a small team of 2–3 engineers.

Responsibilities

• Provide technical guidance to a small team of 2–3 engineers — mentoring through design reviews, pairing, and thoughtful feedback
• Design and develop backend services using Golang
• Write and optimize complex SQL queries for high-performance applications
• Handle large datasets and data-intensive workflows
• Guide backend technical approaches for CRM Ops / XLerate, unblocking the team and raising the quality bar
• Work with a cross-functional team to transform ideas into human experiences for fitness entrepreneurs
• Use Agile & Lean methods with DevOps and CI/CD

Skills

Golang

MySQL

SQL

Backend development

Leadership

Agile methodologies

CRM/XLerate

Education

Bachelor’s degree in Computer Science

Tools

CI/CD

Golang tooling

Job description

ABC Fitness in Poland is seeking an experienced backend engineer to design and develop scalable Golang services, write and optimize complex SQL queries, and handle large datasets for our CRM and XLerate platforms.

You will lead a small team of 2–3 engineers, collaborate with product and QA, and help set technical direction while contributing to high-impact projects across the CRM ecosystem.