Sigma Software

Senior Back-end Engineer ( Accessibility Product House)

Poland full-time Senior Salary not listed
full-time Senior level Technology & IT Curated
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About the role

Design and implement scalable, distributed Back-end solutions for a SaaS platform

Architect and deliver complex systems focused on accessibility compliance and platform scalability

Develop and maintain microservices and cloud-native applications

Plan, execute, and support large-scale software delivery pipelines

Monitor system health, troubleshoot production issues, and optimize service performance

Research, evaluate, and integrate modern technologies into the Back-end ecosystem

Collaborate with cross-functional teams on architecture evolution and technical strategy

Contribute to infrastructure and SaaS architecture decisions

Improve reliability, scalability, observability, and maintainability of distributed systems

Utilize AI-assisted development practices and tools within the software delivery lifecycle

Participate in code reviews, technical discussions, and engineering best practices initiatives

5+ years of experience as a Software Engineer including at least 1 year of extensive AI SDLC experience

Strong Back-end development experience in at least 2 of the following programming languages: Golang (primary), Kotlin, or other JVM-based languages

Hands-on experience with AI coding tools such as Claude Code, Cursor, Microsoft Copilot, or similar

Proficiency with at least one major cloud provider such as GCP, AWS, or Azure, including serverless and container-based deployments

Some experience with Elasticsearch and BigQuery

Familiarity with multiple data stores and services including SQL, NoSQL, Elasticsearch, BigQuery, etc.

Proficiency with at least one messaging or streaming system such as Kafka, Flink, Spark, Pub/Sub, or RabbitMQ

Knowledge of high-scale stream and batch processing systems including Flink, Spark, and Kafka

Strong background in microservices architecture, distributed systems, serverless solutions, and high-scalability systems

Familiarity with production monitoring and performance optimization

Familiarity with CI/CD pipelines and deployment processes

At least Upper-Intermediate level of English

WILL BE A PLUS

Familiarity with ClickHouse

Experience in Full Stack and/or Front-end development

Experience with accessibility-related products or compliance-focused systems

Experience working with AI-enabled SaaS platforms

PERSONAL PROFILE

Independent and proactive mindset

Strong problem-solving skills

Passion for learning and adopting new technologies

Excellent communication and collaboration skills

Team-oriented attitude with commitment to high-quality delivery

Ability to work effectively in a fast-paced and evolving environment

Join a project that helps make digital products accessible to millions of users worldwide. We are looking for a Senior Back-end Engineer to contribute to the development of a high-scale SaaS platform focused on accessibility automation and compliance.
As part of Sigma Software, you will work remotely with distributed teams across Ukraine, Poland, Romania, and Albania while contributing to cloud-native and data-intensive solutions built with modern Back-end technologies. This role combines hands-on engineering, architecture evolution, and infrastructure decision-making in a fast-growing product environment.
We at Sigma Software create opportunities for engineers to influence technical strategy, work with modern technologies, and grow within an international engineering community focused on meaningful products and long-term collaboration.
CUSTOMER
Our Customer is a rapidly growing technology company specializing in digital accessibility solutions for enterprise web and mobile products. Its AI-enabled software helps organizations identify, analyze, and resolve accessibility issues across digital platforms while integrating directly into software development pipelines. Due to NDA restrictions, the Customer name cannot be publicly disclosed.
PROJECT
The project focuses on scaling a modern SaaS platform used by enterprise customers worldwide. The team is developing distributed Back-end services with a strong emphasis on microservices architecture, cloud infrastructure, large-scale data processing, and high system reliability. The platform leverages AI-driven analysis to automate accessibility compliance and improve development workflows.
You will contribute to architecture evolution, cloud infrastructure improvements, and optimization of high-load distributed systems while collaborating closely with international engineering teams.
Originally posted on Himalayas

Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Senior
Technology & IT MySQL SQL Senior Back End Senior level

Likely questions

  1. Tell us about work you have done that is close to the Senior Back-end Engineer ( Accessibility Product House) role.
  2. How would you approach your first 30 days at Sigma Software?
  3. Which of MySQL, SQL and Senior have you used recently, and what did it help you achieve?
  4. How have you led people, improved a process, or made a hard decision in a previous role?
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with MySQL, SQL and Senior.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior Back-end Engineer ( Accessibility Product House) role because I can bring practical experience in MySQL, SQL and Senior, learn the team quickly, and contribute to the outcomes Sigma Software needs from this hire.

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