Principal GoLang Engineer

We are looking for an exceptionally experienced Principal Go Engineer to join the team developing a complex distributed data and analytics platform.

This role is intended for a hands-on engineer who has designed, built and operated large-scale production systems. You will take technical ownership of critical platform components, define architecture, identify risks and lead solutions from initial design to production deployment.

The platform processes high volumes of network and telemetry data across Kubernetes-based, cloud and on-premises environments.

• Designing and developing scalable, fault-tolerant backend services in Go
• Building high-throughput data ingestion and event-processing pipelines
• Designing event-driven architectures based on Apache Kafka
• Defining service boundaries, data flows and communication patterns
• Making architectural decisions concerning scalability, consistency, availability and failure recovery
• Diagnosing performance, concurrency and production reliability issues
• Improving engineering standards for code quality, testing, observability and security
• Leading complex technical initiatives and mentoring experienced engineers
• Cooperating with architects, DevOps engineers, product teams and domain experts

• At least 10 years of professional software engineering experience
• At least 5 years of substantial commercial experience with Go
• Experience working as a Staff Engineer, Principal Engineer, Technical Lead or Solution Architect
• Proven technical ownership of complex production systems
• Strong experience designing and operating distributed, highly available systems
• Experience with platforms processing high volumes of events, traffic or data
• Deep knowledge of Go, including concurrency, memory management, profiling, testing and performance optimisation
• Strong understanding of distributed systems concepts, including:
  • partitioning and replication
  • eventual consistency
  • idempotency and delivery guarantees
  • retries and failure handling
  • high availability and graceful degradation
• Extensive experience with Apache Kafka or a comparable event-streaming platform
• Strong experience with microservices and RESTful API design
• Advanced SQL skills and commercial experience with PostgreSQL
• Production experience with Docker and Kubernetes
• Experience diagnosing complex incidents in distributed environments
• Good understanding of observability, application security and reliable software delivery
• Ability to make and clearly communicate architectural decisions
• Very good command of English

Practical experience using AI coding tools to accelerate development, testing, debugging, or code review
Experience introducing AI-assisted workflows without compromising security, quality, or engineering judgment
Background in networking, telecommunications, observability, or high-volume data platforms
We value engineers who prefer clear trade-offs over fashionable abstractions, working software over elaborate diagrams, and measurable improvements over technical theatre.

I agree to the processing of my personal data contained in my application documents by the company Transition Technologies PSC S.A. with its registered office in Łódź at Wólczańska 180 street, KRS number: 0000930989, tax ID number (NIP): 7292712388, statistical registration number (REGON): 365249538, that becomes their Controller.

You can contact the Data Controller by way of:
a) traditional mail at: Wólczańska 180 street, Łódź 90-530;
b) electronic mail at: recruitment@ttpsc.pl or contact@ttpsc.com;
c) telephone at: +48 661 799 553;
d) the Data Protection Inspector: Bartosz Starzomczyk, gdpr@ttpsc.com.

Your data will be processed for the following purposes: 1. for the purposes of responding to queries regarding the recruitment processes, the purposes of providing information on current recruitment processes – the legal basis for such processing is Article 6.1.a of the GDPR; 2. the purposes of carrying out and completing the recruitment process (Article 6.1.c GDPR); 3. preparation and conclusion of a preliminary contract (if applicable) and employment contracts (Article 6.1.b GDPR); 4. preparation of a referral for medical examinations (Article 6.1.c GDPR), as it is necessary to fulfill the legal obligation under Art. 229 § 4a of the Act of June 26, 1974 – Labor Code, in accordance with the referral template in the relevant Regulation of the Minister of Health and Social Welfare for this obligation; 5. the purposes of taking action on your initiative with the view to signing a contract (in the event of a successful outcome of the recruitment) (Article 6.1.b GDPR) or the purposes of taking action on the initiative of Transition Technologies PSC with the view to signing a contract (in the event of a successful outcome of the recruitment; including the conduct and evaluation of tests of the candidates’ qualifications, if applicable) – the legal basis for such processing is the legitimate interest of the Data Controller consisting in recruiting an employee (Article 6.1.f GDPR); 6. to establish, defend or assert claims (Article 6.1.f GDPR), as the processing is necessary to pursue a legitimate interest pursued by the Data Controller, consisting in establishing, defending or asserting the same; 7. in the event of an additional consent being granted – for the purposes of considering you for future recruitment (Article 6.1.a GDPR); 8. in the event that you provide data other than those required by law – on the basis of your consent, for the purposes of implementing the recruitment process (Article 6.1.a GDPR), and in the event of provisions of special category data – Article 9.2.a GDPR; 9. in the event of an additional consent being granted – for the purposes of sending via e-mail information and marketing communications regarding webinars, technical content, events, educational materials and career-related initiatives organized or promoted by Transition Technologies PSC S.A. (Article 6.1.a GDPR).

You have the right to: 1. access, rectify, request erasure of your data, as well as the right to restrict processing of your data, the right to data portability, and the right to object to the processing of your data; 2. withdraw your consent at any time, including consent to receive e-mail information and marketing communications, without such withdrawal affecting the lawfulness of the processing carried out on the basis of said consent prior to its withdrawal, insofar as the processing is carried out on the basis of Article 6.1.a or Article 9.2.a GDPR; 3. lodge a complaint with the President of the Office for Personal Data Protection (Prezes Urzędu Ochrony Danych Osobowych), st. Stawki 2, 00-193 Warsaw, if in your opinion your personal data are processed in violation of the rules on personal data protection.

Your personal data may be transferred to: 1. other entities within the Transition Technologies group of companies, 2. providers of IT systems and hosting services for the Company, 3. recruitment agencies, 4. entities providing HR and payroll services for the Company, 5. law firms and legal advisors.

Since the Company conducts business internationally, it may be necessary to transfer your personal data outside the European Economic Area. No automated decision-making, including profiling, will be carried out in connection with the processing of your personal data.

Your data will be processed for the period of: 24 months from the moment of submission of an application, CV or your contact with the Data Controller via the contact form available in the “career” tab – in the event that you consent to participating in recruitment processes during the aforesaid period and/or consent to receiving e-mail information and marketing communications regarding webinars, technical content, events and career-related initiatives. Your provision of your personal data to the extent required by the provisions of labour law is mandatory and necessary for the purposes of the recruitment process. Your provision of any data other than those mentioned above is voluntary, and your refusal to provide the same will not entail any adverse consequences. In the course of the recruitment process, you should not provide special category data (i.e. data such as those listed in art. 9 of the GDPR, concerning your racial or ethnic origin, political views, religious or philosophical beliefs, trade union membership, genetic data, biometric data, data concerning health, sexuality or sexual orientation; or data such as those listed in art. 10 of the GDPR: criminal convictions or violations of law). However, if you wish to do so (data such as art. 9 of the GDPR) because you believe it to be necessary for the recruitment process, you will be required to give your explicit consent for the processing thereof by way of: completing an additional statement that you will receive from our HR Department. If we do not have your unambiguous consent to the processing of categories of data base on art. 9 of the GDPR and when you provide us with the data from the art. 10 of the GDPR – we will have to remove them from your application documents and do not include them in the recruitment process. Should the Data Controller plan to process your personal data for any purpose other than the purposes defined in Section II above, you will be informed in advance of any such other purpose and provided with any relevant information regarding such processing via email.