Lead Backend Engineer

Onthespotdev; Warszawa; On-site; PLN 235,848 - 364,493; Full time

Benefits offered by this job

Supportive work environment

Comprehensive benefits package

Job summary

Onthespotdev is looking for a hands-on engineering leader to manage and support its local team in Warsaw, Poland. The role demands balancing technical expertise with team management, guiding product architecture, and owning delivery workflows.

Ideal candidates should have strong experience in Go, Python, and AI coding agents while leading software engineering efforts that enhance product stability and customer satisfaction.

Join us and leverage your expertise to drive innovation in a supportive and challenging work environment.

Qualifications

• 7+ years of production software engineering experience.
• 1+ year as a tech lead or team lead.
• Ability to prioritize and organize effectively.

Responsibilities

• Lead the team's delivery and manage the roadmap.
• Work closely with Product Managers.
• Drive architecture and design decisions.

Skills

Hands-on Go development experience

Experience using AI coding agents

Production software engineering experience

SQL database capabilities

Analytical systems

Micro-service architecture

Software design principles

Team management and delivery planning

Education

Bachelor’s degree in Computer Science or Engineering

Tools

Python

Go

AWS

PostgreSQL

Job description

We bring startups and disruptive tech companies to the local market, offering engineers the opportunity to work on innovative, high-impact products. Join us and become a member of their R&D team while we take care of employment, HR support, a benefits package, and an enjoyable work environment.

We’re building a local Polish team for a company in the cybersecurity domain.

We'll be happy to tell you more about the product during the interview process.

About the role

This is a hands‑on engineering leadership role for someone who enjoys balancing technical depth with team leadership.

You’ll own a critical product domain end to end, shaping its architecture, guiding delivery, and helping both the product and the team grow.

Responsibilities

• Lead the team's delivery: own the committed items, plan and groom the roadmap, run sprint planning, and lead backlog analysis
• Work closely with Product Managers and other R&D managers to align priorities, manage dependencies, and translate product goals into an executable plan
• Drive architecture and design decisions across the team, where data correctness, customer-facing API stability, multi-tenant isolation, and pipeline reliability are first-class concerns
• Stay hands‑on: write clean, concise, well‑tested code on critical paths — primarily in Python, with Go for selected backend services
• Use AI agents to accelerate development, investigation, code review, and lead the team in building effective, safe agent‑assisted workflows
• Diagnose complex issues, evaluate options, and recommend and execute the best solution
• Own the domain end-to-end, including DevOps: CI/CD, cloud infrastructure on AWS, and monitoring/alerting
• Lead the team's on‑call rotation and production incident response for the domain
• Run team ceremonies, manage delivery against the roadmap, and grow team members
• Manage the performance of the team

Requirements

• Bachelor’s degree in Computer Science, Engineering, or relevant experience
• 7+ years of production software engineering experience
• Hands‑on Go development experience for backend services
• Practical experience using AI coding agents in day‑to‑day engineering, and a point of view on where they add the most value
• Experienced in building and supporting analytic systems
• Knowledge of designing and implementing event‑driven systems
• Deep understanding of SQL database capabilities within web applications (PostgreSQL)
• Experienced with micro‑service architecture and cloud‑native services, focused on AWS cloud infrastructure
• Solid understanding of software design principles, concurrency, synchronization, memory management, data structures, algorithms, etc.
• 1+ year as a tech lead or team lead, with proven ability to plan and own delivery, make and defend technical decisions, and grow other engineers
• Ability to prioritize and organize effectively, with good communication skills
• Solid analytical and troubleshooting abilities

Nice to have

• Experience defining team‑wide practices for AI‑assisted development (agent workflows, review and quality guardrails)
• Experience with modern analytics and data‑pipeline tooling
• Experience building or maintaining publicly published developer or infrastructure‑as‑code tooling
• Experience owning customer‑facing reliability and leading incident response

Benefits

At On The Spot, we’re creating a workplace people would want to stay in: supportive, well‑organized, and fair in terms of conditions and benefits.

We’ll share more about our benefit package during the interviews. In the meantime, you can always check our Glassdoor reviews.

Position is open to candidates in Poland. You need to have a residence permit or another valid document allowing work in Poland. Thank you!