FinTech Client #3 | Squad Lead (Domain owner)

SD Solutions; Warszawa; On-site; PLN 300,000 - 520,000; Full time

Job summary

SD Solutions, on behalf of FinTech Client #3, is seeking a Squad Lead to drive technical leadership, domain design, and day-to-day execution within a multidisciplinary squad of frontend, backend, and data engineers.

You will collaborate with product managers and stakeholders to translate requirements into scalable solutions, ensure architectural integrity, and promote engineering excellence across the team.

Qualifications

• 4+ years of leadership experience guiding engineering teams and architectural decisions.
• 5+ years of software engineering with a focus on scalable architecture and system design.
• Strong backend expertise with Kotlin/Java; .NET acceptable (learning curve) and Python possible.
• Familiarity with microservices architecture and distributed systems.
• Ability to use data to drive decisions and maximize team impact.
• Excellent communication skills and ability to thrive in a fast-paced environment.
• B.Sc. in Computer Science or equivalent.
• Fluent in English.

Responsibilities

• Lead technical architecture and system design for core products within the domain.
• Guide a multidisciplinary squad of frontend, backend, and data engineers through delivery.
• Collaborate with product managers and stakeholders to translate requirements into scalable solutions.
• Ensure development aligns with business objectives and long-term system health.
• Conduct and lead design and code reviews and performance optimization.
• Foster a culture of technical excellence, ownership, and continuous improvement.
• Oversee system reliability, monitoring, and incident response within the domain.

Skills

Leadership

System design

Backend development

Microservices

Kotlin/Java

Cloud AWS

Spring

Databases

Message queues

English fluency

Education

B.Sc. in Computer Science or equivalent

Tools

Kotlin

Java

.NET

Python

AWS

Spring

MySQL

MongoDB

Kafka

SQS

RabbitMQ

Cursor

Claude Code

Job description

On behalf of FinTech Client #3 , SD Solutions is looking for a talented Squad Lead.

As a Squad Lead, you will be responsible for the team's technical leadership, domain design, and day-to-day execution. You will collaborate closely with product managers and business stakeholders to define priorities and deliver impactful solutions that align with key business goals. We are looking for someone who can drive end-to-end ownership, balance business needs with strong engineering practices, and help shape the direction of our products.

Responsibilities:

• Technical Architecture—Lead the technical architecture and system design for core products and services within your domain.
• Team Leadership—Guide a multidisciplinary squad of frontend, backend, and data engineers through implementation, delivery, and iteration.
• Stakeholder Collaboration—Work closely with product managers and business stakeholders to translate requirements into scalable technical solutions.
• Strategic Alignment—Ensure development aligns with business objectives, long-term system health, and team's engineering standards.
• Quality—Conduct and lead design reviews, code reviews, and performance optimization efforts.
• Culture Building—Drive a culture of technical excellence, ownership, and continuous improvement.
• Operational Excellence—Oversee system reliability, monitoring, and incident response within your domain.

Requirements:

• 4+ years of leadership experience, guiding engineering teams and making architectural decisions
• 5+ years of software engineering experience, with a strong focus on scalable architecture and system design
• Very strong backend expertise: Kotlin/Java preferred stack; .NET acceptable (requires learning curve); Python possible
• Proficiency in modern system architecture with large-scale and high performance.
• Impact driven—use data to make sure every task moves the needle and utilize your resources to maximize the team's impact.
• Team player with strong communication skills and someone who thrives working in a fast-paced environment.
• Creative, solution-oriented, and able to maintain a 'can do' attitude, with the ability to work efficiently under pressure and uncertainty. Adapt quickly to changing business needs.
• Familiarity with microservices architecture and distributed systems.
• B.Sc. in Computer Science or equivalent.
• Fluent in English.

Preferred Experience:

• Experience with software development in Kotlin or Java.
• Experience with Front End technologies.
• Experience with mobile technologies.
• Leading a multidisciplinary team.
• Familiarity with microservices architecture and distributed systems.
• Solid understanding of AWS or similar cloud platforms.
• Expertise in the Spring Framework.
• Proficient in both relational (e.g., MySQL) and non-relational databases (e.g., MongoDB).
• Familiarity with message queue technologies such as Kafka, SQS, RabbitMQ, or similar.
• Experience with AI development tools like Cursor and Claude Code

About the company:

A fintech company that builds point-of-sale financing and consumer credit products for everyday service businesses. Their solution is deployed at thousands of service locations — including auto service centers, dental offices, optical clinics, and veterinary practices — and is managed through a no-fee mobile credit card.

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