Senior Software Engineer

Aduna Global; Łódź; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Employment contract

Hybrid work model

Private medical care

Life insurance

Multisport card

Unlimited paid time off

High ownership and growth

Job summary

Aduna Global Poland is seeking a Software Developer on the Traffic Plane team to help connect Aduna to CSP Service Exposure APIs, architecting scalable backend solutions and driving technical decisions. You will mentor junior engineers, participate in design reviews, and collaborate with SRE, security and product teams to improve observability, performance and reliability.

The role combines hands-on coding with architectural influence in a hybrid setup based in Łódź, offering private medical

Qualifications

• 5+ years building and operating backend services, distributed systems, or large-scale integrations in production.
• Experience as a Senior Developer or equivalent technical role at a technology company.
• Track record of delivering meaningful technical initiatives with availability, performance, and security requirements.
• Experience integrating with telecom service API.
• Background in SRE, DevOps, or infrastructure engineering.
• Strong expertise in backend and integration design: service-to-service communication, data consistency, idempotency, and resiliency patterns (retries, circuit breakers, backpressure).
• Proficiency in at least one backend language such as Go, Java, or Python.
• Experience with cloud platforms (Azure, AWS), Kubernetes, Service Meshes like Istio, Caches like Redis and message brokers (Kafka or similar).
• Expertise in optimizing ELK Stack (Elastic Search, Log Stash, Kibana).
• Hands-on experience with infrastructure as code, CI/CD, and GitOps (Terraform, FluxCD, GitLab CI or similar).
• Strong understanding of observability, SLOs, capacity planning, and performance engineering.
• Expertise to identify and solve performance bottlenecks for high throughput systems.
• Excellent communication skills across engineering, product, and executive audiences.
• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.

Responsibilities

• Contribute to the technical direction and architectural decisions for Aduna’s API aggregation.
• Participate in and lead design reviews for API aggregation: Service Exposure connectors, Authentication and Authorization, observability, logging, security and metering.
• Apply and help evolve technical standards and best practices; evaluate new technologies and propose improvements to the API aggregation.
• Identify risks and contribute to architectural improvements addressing scalability, resilience, and operational complexity.
• Tackle complex technical problems spanning Aduna services, CSP Service APIs, and external partners; contribute to incident investigations and drive corrective actions to completion.
• Optimize end-to-end request flows, identify performance bottlenecks, and evolve the architecture for high throughput and low latency.
• Collaborate with Product to translate business goals into technical solutions; improve developer productivity through better tooling, CI/CD, and automation.
• Mentor engineers on system design, operational excellence, and technical decision making.
• Raise the engineering bar through code reviews, design feedback, knowledge sharing, and promoting rigor in testing, observability, and security.

Skills

Backend design

APIs and integration

DevOps / SRE mindset

Communication

Mentoring juniors

Cloud platforms

Go/Java/Python

Service communication

Observability

Security practices

Education

Bachelor's degree in CS/Engineering

Tools

Kubernetes

Istio

Redis

Kafka

Elasticsearch

Logstash

Kibana

Terraform

FluxCD

GitLab CI

Job description

All Together, Extraordinary

adunaglobal.com

Aduna is the Connector of networks , bringing together leading telecom operators and technology partners to simplify global access to Network APIs. Through a single, unified platform, we enable businesses and developers to build more secure, seamless and innovative digital services.

As a Software Developer on the Traffic Plane team, you will be a key technical contributor for the systems connecting Aduna to CSP Service Exposure APIs, aggregating and exposing Aduna APIs to Application Service Providers. You’ll contribute to architecture decisions, lead complex engineering work, and collaborate closely with Engineering, Product, SRE, Security, and external CSP counterparts.

This is a hands-on technical role with meaningful influence on system design and engineering standards — no people management, but active participation in technical discussions, mentorship of junior engineers, and cross-team collaboration are expected.

What You’ll Do

Technical Leadership & Architecture

• Contribute to the technical direction and architectural decisions for Aduna’s API aggregation
• Participate in and lead design reviews for API aggregation: Service Exposure connectors, Authentication and Authorization, observability, logging, security and metering.
• Apply and help evolve technical standards and best practices; evaluate new technologies and propose improvements to the API aggregation.
• Identify risks and contribute to architectural improvements addressing scalability, resilience, and operational complexity.

Complex Problem Solving & Delivery

• Tackle complex technical problems spanning Aduna services, CSP Service APIs, and external partners; contribute to incident investigations and drive corrective actions to completion.
• Optimize end-to-end request flows, identify performance bottlenecks, and evolve the architecture for high throughput and low latency.
• Collaborate with Product to translate business goals into technical solutions; improve developer productivity through better tooling, CI/CD, and automation.

Mentorship & Technical Culture

• Mentor engineers on system design, operational excellence, and technical decision making.
• Raise the engineering bar through code reviews, design feedback, knowledge sharing, and promoting rigor in testing, observability, and security.

What You Bring

• 5+ years building and operating backend services, distributed systems, or large-scale integrations in production
• Experience as a Senior Developer or equivalent technical role at a technology company
• Track record of delivering meaningful technical initiatives with availability, performance, and security requirements
• Experience integrating with telecom service API
• Background in SRE, DevOps, or infrastructure engineering
• Strong expertise in backend and integration design: service-to-service communication, data consistency, idempotency, and resiliency patterns (retries, circuit breakers, backpressure)
• Proficiency in at least one backend language such as Go, Java, or Python
• Experience with cloud platforms (Azure, AWS), Kubernetes, Service Meshes like Istio, Caches like Redis and message brokers (Kafka or similar)
• Expertise in optimizing ELK Stack (Elastic Search, Log Stash, Kibana)
• Hands-on experience with infrastructure as code, CI/CD, and GitOps (Terraform, FluxCD, GitLab CI or similar)
• Strong understanding of observability, SLOs, capacity planning, and performance engineering
• Expertise to identify and solve performance bottlenecks for high throughput systems
• Excellent communication skills across engineering, product, and executive audiences
• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience

Bonus

• Experience with telecom industry
• Experience with API management platforms, identity systems, and policy enforcement
• Exposure to OpenAPI, CAMARA, or similar standards-driven ecosystems

Why Join Aduna?

• Impactful Work: Shape cutting-edge digital platforms that millions will rely on
• Innovative Culture: High ownership, collaboration, and learning
• Growth & Flexibility: modern tools, and work-life balance

Our Offer:

• Employment contract providing security and transparency
• Hybrid work model : 3 days in the office in Łódź (Poland), 2 days remote - your balance matters.
• Private medical care , life insurance , and a Multisport card to support your health and lifestyle
• Unlimited paid time off - because we trust you to manage your time responsibly
• A collaborative environment with high ownership , innovation, and room to grow

By applying I hereby express my consent to process my personal data included in my job offer by Aduna Global Poland Sp. z o.o. or any other entity of the Aduna Global group for recruitment purposes, and that it is a data controller within the meaning of GDPR. More information about Aduna Global (and if necessary also its representative) can be found here: https://www.adunaglobal.com/privacy-notice/

Aduna is committed to fostering a diverse and inclusive workplace. We welcome applicants from all backgrounds who are passionate about driving the next wave of innovation in telecommunications.