Role & seniority: Software Development Engineer in Test (SDET), senior/technical-leader with 8–10+ years in test automation.

Stack/tools: Python, Go, Java, JavaScript/TypeScript; AWS or GCP; Docker, Kubernetes; serverless; Pub/Sub, Cloud Tasks, Kafka; REST/SOAP APIs; load, performance, chaos testing; CI/CD tooling; Ansible, Puppet, Terraform; relational and NoSQL databases; experience with distributed systems debugging/tracing.

Top 3 responsibilities

Lead architecture and design reviews for high-scale distributed systems; evolve scalable, self-healing test automation frameworks for microservices/event-driven pipelines.
Own automation and quality infrastructure: optimize CI/CD, test planning, development and execution; drive reliability-focused testing (shift-left, chaos engineering).
Mentor and guide across applications/components; evaluate new testing technologies (e.g., contract testing, AI-driven debugging); support SDET activities across the stack.

Must-have skills

8–10+ years in software test automation; designing/building enterprise-grade test frameworks from scratch.
Proficiency in one or more major languages (Python/Go/Java/JS/TS).
Strong cloud (AWS or GCP) and cloud-native services; containerization (Docker/Kubernetes); serverless.
Experience testing asynchronous, event-driven architectures; distributed systems debugging/tracing.
API testing (REST/SOAP), multi-tier/distributed architectures; load/performance/chaos testing;

Full Description

More about us

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

About the Role

For our client, a global cloud communications provider, we are currently looking for a Software Development Engineer in Test. In this position you are a technical leader and expert in quality engineering for the client's platform. You will ensure the continuous quality, testability, and security of code throughout the software development lifecycle by helping architect and support systems.

What we are looking for

8-10+ years of professional experience in software test automation, including designing, building and creating test frameworks Proven track record of designing, building, and creating enterprise-level test frameworks from scratch. Good software development/scripting skills in common languages like Python, Go, JAVA, JavaScript /Typescript, etc. Experience with Cloud (preferably AWS or GCP) Proficiency with cloud-native services, including containerization (Docker, Kubernetes) and serverless functions Deep understanding of testing asynchronous, event-driven architectures including Pub/Sub, Cloud Tasks, or Kafka. Experience with testing applications with multi-tiered and distributed architecture, preferably with Restful Web Service API testing with knowledge of REST and/or SOAP APIs Experience with load, performance, chaos and scalability testing Handling complex software system infrastructure tasks – from requirements to production. Experience in designing, developing, building and running a Continuous Integration Test system Experience with debugging and tracing distributed systems to identify issues with test failures

What you will do

Strategic Leadership & Architecture - Act as a strategic leader in architecture and design reviews for high-scale distributed systems. Lead the design and evolution of next-generation, scalable, and self-healing test automation frameworks for microservices and event-driven pipelines, handling high-concurrency workloads. Drive non-functional automation solutions, emphasizing redundancy, failover, and performance across cloud infrastructure. Automation & Quality Infrastructure Ownership - CI/CD pipelines optimization, test planning, development and execution Reliability & Shift-Left Implementation - lead the transition from traditional QA to a reliability-focused testing model, including implementing Chaos Engineering and proactive monitoring to prevent customer-impacting failures. Agile Execution & Process Improvement Technology & Mentorship - evaluate and drive the adoption of new state-of-the-art testing technologies, such as contract testing or AI-driven debugging. SDET support across multiple applications and system components. Also, Utilize and gain expertise in technologies such as AWS and GCP, Ansible, Puppet, Terraform, Kubernetes, Docker, Microservices Architecture, Relational and NoSQL Databases, Python, Java, and Go

Our offer

Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers. Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location. Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & amp; more. Global collaboration - work with a diverse, international team. Innovative environmentbe part of a forward-thinking and growth-oriented workplace. Engaging community - Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work. Team-building events including our company tradition (annual company event in Mazury). A pleasant surprise to start your journey with us in the form of a welcome pack.

Recruitment process

HR call Technical interview Client Interview Decision/ Feedback

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