(Senior) Software Engineer with Java

Aviva plc; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Contract of employment

Performance Bonus

Private medical care

Cafeteria system of benefits

Additional parental leave

Job summary

Aviva plc in Warsaw is seeking a Senior Software Engineer to build high-performance microservices and secure APIs that access enterprise data. You will work in a cloud-native environment with Spring Boot and Python, containerised services, and real-time system integration.

You will design RESTful APIs, implement event-driven patterns with Kafka, and deploy on AWS ECS, supporting CI/CD and observability.

Qualifications

• Senior level: 4+ years of software engineering experience.
• Proven expertise in Java and Spring Boot.
• Experience building RESTful APIs and microservices.
• Knowledge of event-driven architectures and Kafka.
• Experience with AWS services including ECS, S3, Aurora/PostgreSQL and API integration services.
• Understanding of containerisation technologies.
• Experience with CI/CD pipelines and DevOps practices.
• Strong understanding of API security and authentication patterns.
• Experience with API design standards such as OpenAPI/Swagger.

Responsibilities

• Design, develop and maintain RESTful APIs, microservices and integration services.
• Build containerised applications using Spring Boot and Python.
• Develop secure, scalable API solutions for ODS access and integration.
• Create event-driven services and integrations using Kafka/MSK.
• Collaborate with Architects, Data Engineers and Product Teams on technical design and Agile delivery.

Skills

Java

Spring Boot

REST APIs

Microservices

Kafka

AWS ECS

OpenAPI/Swagger

CI/CD

API security

Python

Tools

Kong API Gateway

AWS API Gateway

Job description

Role Overview

As a Senior Software Engineer you will be responsible for building and supporting high-performance microservices and APIs that provide secure access to enterprise operational data. Working within a cloud-native architecture, you will develop containerised services using Spring Boot and Python, enabling real-time integration between business systems and the ODS platform. You will play a key role in implementing modern API-led and event-driven integration patterns, helping to establish reusable services and standards that support enterprise-wide data consumption.

Key Responsibilities

• Designing, developing and maintaining RESTful APIs, microservices and integration services.


• Building containerised applications using Spring Boot and/or Python.


• Developing secure, scalable and resilient API solutions supporting (ODS) Operational Data Store access and integration.


• Building event-driven services and integrations using Kafka/MSK.


• Creating reusable frameworks, service templates and integration patterns.


• Integrating with upstream and downstream systems using synchronous and asynchronous communication patterns.


• Supporting API lifecycle management, including versioning, contracts and service reliability.


• Deploying and operating services on AWS ECS while supporting CI/CD and infrastructure automation.


• Implementing monitoring, logging, observability and performance best practices.


• Collaborating with Architects, Data Engineers and Product Teams while contributing to technical design, documentation and Agile delivery.

Required Skills and Qualifications

• Strong software engineering experience (Senior - over 4 years, Regular – over 3 years).


• Proven expertise in Java and Spring Boot.


• Experience building RESTful APIs and microservices.


• Knowledge of event-driven architectures and Kafka.


• Experience working with AWS services including: ECS, S3, Aurora/PostgreSQL and API integration services.


• Understanding of containerisation technologies.


• Experience with CI/CD pipelines and DevOps practices.


• Strong understanding of API security and authentication patterns.


• Experience with API design standards such as OpenAPI/Swagger.


• Desirable: Experience with Kong API Gateway or AWS API Gateway.


• Desirable: Experience with Kafka/MSK.


• Desirable: Experience with Python development.


• Desirable: Knowledge of CDC and event sourcing patterns.


• Desirable: Experience in Insurance or Financial Services.


• Desirable: Understanding of enterprise canonical data models.

Benefits and Perks

• Contract of employment


• Performance Bonus


• Private medical care (ENEL‑MED)


• Cafeteria system of benefits (e.g. MultiSport card)


• Additional parent privileges: baby leave – 6 weeks leave for second parent


• Additional parent privileges: shortened working time after parental leave


• Employer‑funded group insurance


• Employee Shares Plan


• Extra day off for birthday


• Paid time off to volunteer


• Additional leave acquired over the years in the company (even 5 days more in a year)


• Wellbeing Leave – additional two weeks paid leave after 10 years of service


• Psychological support consultations ...