Senior Software Engineer (Poland)
- Level
- Senior
- Work type
- Remote · Poland only
Not stated in the posting: salary, visa.
Open. First seen 7 March 2026.
About the role
Sezzle's standard text
About Sezzle:
With a mission to financially empower the next generation, Sezzle is revolutionizing the shopping experience beyond payments, blending cutting-edge tech with seamless, interest-free installment plans that make shopping smarter and more accessible. We’re not just transforming payments; we’re redefining how people discover, interact with, and purchase the things they love while driving real impact on merchant sales through increased conversions and higher order values. As we continue to shape the future of fintech and retail, we’re building an innovative, dynamic team passionate about creating more than just a transaction but a truly unique shopping journey.
If you’re excited about pushing boundaries in tech and delivering a game-changing experience for consumers and merchants alike, come join us at Sezzle and help create the future of shopping!
About the Role:
We are seeking a talented and motivated Senior Software Engineer who is best in class with a high IQ plus a high EQ. This role presents an exciting opportunity to thrive in a dynamic, fast-paced environment within a rapidly growing team, with abundant prospects for career advancement.
As a Senior Software Engineer with Sezzle, you will work with a highly-motivated team to tackle interesting and challenging problems across multiple areas of the organization. Your experience and guidance will help other members of the team level-up their own skills as well.
In this backend focused role, you will work closely with stakeholders from Product, Support and the business. You’ll also partner with other engineering teams to provide high-quality, scalable, and innovative solutions to internal and customer problems. Your day-to-day responsibilities will include designing, developing, and delivering new features, as well as unblocking and mentoring your teammates.
This role has both an internal and external focus, your contributions will make a meaningful difference in the day-to-day lives of your peers at Sezzle, enhancing their ability to support our business and customers, and you will have opportunities to take any feedback and iterate.
Sezzle's standard text
Interview Process
We believe transparency is important at Sezzle. Regularly providing feedback while setting expectations is part of our culture starting with the interview process. Advancement through each step is not guaranteed.
- Application submitted (you are here)
- Wonderlic test (30-40 min)
- Coding assessment (~1.5 hours)
- Interview with recruiters (30 min)
- Interview with engineers (1 hour)
- Interview with engineering leadership (30-45 min)
- Offer!
What you'll do:
- Design software applications and features in Golang and React
- Help build out a distributed architecture, creating solutions that work within it, maintaining consistency while scaling highly
- Coordinate with internal company stakeholders to design market winning products
- Develop and collect metrics to drive continuous improvement of existing products
- Deliver high quality features which can be tested and adheres to reporting standards
- As needed, lead small development teams to bring a project to market
- Mentor other engineering teammates to help elevate their experience and knowledge
What We Look For:
- At least 7 years of full-stack software engineering experience
- Experience bringing new ideas and building consensus on the path forward
- Experience with building and serving REST APIs using Go (preferably) and Java Python or a similar language.
- Experience working in a distributed, cloud-based architecture, with either design patterns like transactional outboxes, or queuing tools like RabbitMQ, SQS, Kafka
- Demonstrated experience working with Claude or equivalent large language model tools is required; candidates must be comfortable leveraging AI to enhance productivity, research, and communication.
- Bachelor's degree in Computer Science, Engineering, or a related technical field.
Preferred Knowledge and Skills:
- Experience with SQL based RDMS through an ORM tool
- Comfortable using observability platforms like Prometheus, or vendor solutions like NewRelic or Datadog to instrument your code for production monitoring and alerting.
- DevOps experience with CI/CD pipelines
- Familiarity with containerized micro-service architecture deployed with Kubernetes on AWS
- Demonstrated history of delivering commercial APIs and web applications
- A clear record of getting products to market and prioritizing solutions and improvements based on stakeholder/customer feedback.
Sezzle's standard text
About You:
- You have relentlessly high standards - many people may think your standards are unreasonably high. You are continually raising the bar and driving those around you to deliver great results. You make sure that defects do not get sent down the line and that problems are fixed so they stay fixed.
- You’re not bound by convention - your success—and much of the fun—lies in developing new ways to do things
- You need action - speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk-taking.
- You earn trust - you listen attentively, speak candidly, and treat others respectfully.
- You have backbone; disagree, then commit - you can respectfully challenge decisions when you disagree, even when doing so is uncomfortable or exhausting. You have conviction and are tenacious. You do not compromise for the sake of social cohesion. Once a decision is determined, you commit wholly.
- You deliver results - you focus on the key inputs and deliver them with the right quality and in a timely fashion. Despite setbacks, you rise to the occasion and never settle.
Sezzle’s Technology Stack:
- Languages: Golang, Typescript, Python
- Frontend: Typescript - React and React Native
- Backend: Golang
- Database: MySQL, Postgres, Elasticsearch
- DevOps & Cloud: AWS, Kubernetes
- Version Control: Git
- CI/CD: Gitlab
- Testing: Developer-driven, focus on automated unit, integration, and end-to-end tests
- Sezzle is focused on using open source, and we build what we can before buying!
What Makes Working at Sezzle Awesome?
At Sezzle, we are more than just brilliant engineers, passionate data enthusiasts, out-of-the-box thinkers, and determined innovators; we are skilled musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers. We believe in surrounding ourselves with not only the best and the brightest individuals, but those that are unique and purpose-driven in all that they do. Our culture is not defined by a certain set of perks designed to give the illusion of the traditional startup culture, but rather, it is the visible example living in every employee that we hire.
#Li-remote #Full-time
What this role asks for
Particular to this role
Java · Kafka · RabbitMQ
Rare in Sezzle's other 165 open postings.
In most of Sezzle's ads
AWS · CI/CD · Git · GitLab · Golang · Kubernetes · LLM · MySQL
Named in most of its open postings, whatever the role.
56% of this description is written for the role. The rest is Sezzle's standard text, folded away below.
Read against Sezzle's other open postings on this site.
The team: DV-Development HIRES STEADILY
This role is one of 109 open in DV-Development. 27 were posted in the last 30 days and the oldest in June: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Python (102 of 109), AWS (101 of 109), CI/CD (101 of 109), Git (101 of 109), GitLab (101 of 109), Golang (101 of 109), Kubernetes (101 of 109)
OTHER ROLES ON THIS TEAM
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- Senior Site Reliability Engineer posted Apr 7
- Senior Site Reliability Engineer posted Jan 30
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- Software Engineer II (Venezuela) posted Jan 12
- Software Engineer II (Poland) posted Dec 17
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- Software Engineer II with Accounting Experience (Argentina) posted Dec 1
- Software Engineer II with Accounting Experience (Colombia) posted Dec 1
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- Senior Software Engineer with Accounting Experience (Colombia) posted Nov 28
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- Mobile Engineer (Mexico, All Levels) posted Nov 26
- Mobile Engineer (Brazil, All Levels) posted Nov 26
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- Software Engineer II (Chile) posted Nov 18
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- Software Engineer II (Colombia) posted Nov 18
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- Software Engineer Intern posted Apr 11
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From the team and dates on Sezzle's own job board.
See Software Engineer salaries in Remote →
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