Senior Software Engineer II

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

Benefits offered by this job

Premium medical and dental care

Life insurance

Flex Benefits - Worksmile Cafeteria

Employee Referral Program

Hackathons

Knowledge Sharing Hours

In-house projects

Tech and sport communities

Events and integration parties

Charity initiatives

English/German classes

Game room and chillout zone

Job summary

The Stepstone Group is hiring a Senior Software Engineer II to own complex backend challenges in the Apply domain, built on .NET Core. You will mentor teammates, shape architectural solutions, and stay hands-on throughout delivery to ensure quality and modern software delivery practices.

In this role you’ll solve ambiguous problems with minimal supervision, align technical work with business needs, and contribute to initiatives beyond your own team while advancing the payroll of a global

Qualifications

• Strong hands-on experience with .NET Core and SQL databases.
• Experience building scalable microservices and event-driven architectures.
• Solid understanding of CI/CD pipelines and automated testing.
• Familiarity with AWS cloud services and async messaging patterns.

Responsibilities

• Lead technical initiatives within the team and support cross-team engineering efforts.
• Design and implement architectural solutions while remaining hands-on.
• Mentor engineers and contribute to technical reviews and hiring processes.
• Communicate decisions and trade-offs to technical and non-technical stakeholders.

Skills

.NET Core

SQL

AWS

microservices

CI/CD

Tools

.NET tooling

Job description

Company Description

Who we are

At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for job seekers and companies around the world to find a perfect match, in a fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring.

At our Tech Hub, located near Wilanowska Metro, we are here as more than 300 ambitious specialists who work on the development of our IT products. We are proud to be part of The Stepstone Group, a global expert in job-tech platforms and e-recruiting.

Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the world's leading job-tech platform.

Job Description

The job at a glance

Join our Apply domain as a Senior Software Engineer II and take ownership of complex backend challenges built primarily on .NET Core. This is a senior individual contributor role where you will act as a hands-on technical anchor, shaping architectural solutions while building them together with the team.

Working in the Apply domain, you will solve ambiguous technical problems with low to moderate supervision, choose or adapt the right approach, and help teams connect engineering solutions back to business needs. You will also mentor less experienced engineers and contribute to technical initiatives that go beyond your immediate team.

This is so important to us. By joining our team, you will be playing a vital role as together we reimagine the labour market to make it work for everybody.

Your responsibilities

• Lead technical initiatives within the team and support cross-team engineering efforts.
• Design and implement architectural solutions, remaining hands-on throughout delivery while ensuring code quality, engineering best practices, and modern software delivery standards.
• Identify technical risks and optimization opportunities, recommending and justifying the most effective solutions.
• Mentor and coach engineers, contributing to technical reviews, hiring, and promotion processes.
• Drive knowledge sharing across the engineering organization through Communities of Practice and communicate technical decisions and trade-offs to both technical and non-technical stakeholders.

Qualifications

Your skills and qualifications

• Strong hands-on experience with .NET Core, SQL, AWS, and building scalable microservices/event-driven architectures, including asynchronous communication and message queues.
• Solid understanding of automated testing, CI/CD pipelines, and modern software delivery practices, with experience using or adopting AI-assisted development tools.
• Proven ability to independently solve complex and ambiguous technical challenges, selecting and adapting the most appropriate solutions.
• Experience mentoring and coaching engineers, with exposure to technical interviews, promotion reviews, or other engineering talent processes.
• Self-driven and proactive engineer with excellent judgement, strong ownership mindset, and a track record of contributing to knowledge-sharing initiatives such as Communities of Practice, tech talks, or similar forums.

Additional Information

Your benefits

We\'re a community here that cares as much about your life outside work as how you feel when you\'re with us. Because your job shouldn\'t take over your life, it should enrich it. Here are some of the benefits we offer:

• Premium medical and dental care
• Life insurance
• Flex Benefits - Worksmile Cafeteria System (Multisport, vouchers, tickets etc.)
• Employee Referral Program
• Hackathons, Knowledge Sharing Hours, In-house projects
• Tech and sport communities
• Events and integration parties
• Charity initiatives, 2 extra volunteer days
• English/German classes
• Game room and chillout zone

Our commitment

Equal opportunities are important to us. We believe that diversity and inclusion at The Stepstone Group are critical to our success as a global company, so we want to recruit, develop, and keep the best talent. We encourage applications from everyone, regardless of background, gender identity, sexual orientation, disability status, ethnicity, belief, age, family or parental status, and any other characteristic.