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Senior Java (API) Developer

You will earn
  • UoP: 16 700 – 21 000 PLN gross/month
  • B2B: 120 - 150 PLN net/h + VAT


Publication date

16 Nov 2021





Application deadline

16 Dec 2021


Sigma IT Poland is a division within Sigma AB Group IT consulting and R&D company. We opened our Wroclaw office in 2017 and now we are a 100+ crew.

We have the opportunity to cooperate with world-renowned brands, also from Scandinavia, USA, UK, and Australia. Our goal is to grow strong but rather in competencies than in numbers.

If you like what we do, see our offer, maybe it is you we will have the pleasure to meet! :)


We are looking for a Senior Java (API) Developer who will join our new team in Poland. Our client from Sweden is building a new banking platform free from legacy constraints. New capabilities will be introduced in microservice architecture in a decoupled manner with the aim of a plug and play approach (minimal/no integration effort). 

You will be working on software projects utilizing containers to deploy highly available applications. You will join a team responsible for ensuring and enabling highly available and high-performance inter-service communication for both synchronous and asynchronous communication. The team heavily uses hosted services from AWS such as EKS and API Gateway and hosts a Kafka distributed streaming platform in the cloud. 


In our project you will: 


  •  Develop new and existing products & services according to best practices;  
  •  Develop and manage the products & services according to AWS well architected framework & internal processes; 
  •  Write Kafka microservices applications in Spring boot as well as standalone Java applications which interact with Kafka cluster and perform administration activity on Kafka Cluster; 
  •  Work with DR and Backup strategies & implementation for the different products and services; 
  •  Develop and deploy cloud-native applications, monitor and support a Kubernetes environment, in particular ones that enable inter-service communication for a microservice-based architecture (synchronous and asynchronous communication patterns); 
  •  Security is taken seriously since its a bank and should always be in focus & prior.  
  •  Work with APIs and API Gateway product (preferably from AWS or Kong); 
  •  Design (low level) and implement gateway policies  e.g. for exposing APIs, automation of API ecosystem.  


You might be the perfect match if you are/have: 


  • Advanced knowledge of the implementation of API service architectures (SOAP, REST) with one of the market-leading API management tools such as AWS API Gateway and/or Kong and/or WSO2 and/or Apigee, etc.,  
  • Experience with Kubernetes (self-managed or as a managed service from different cloud providers).  
  • Experience with monitoring tools like ELK/Prometheus/Grafana preferred  
  • Extensive experience in Java, RESTful micro services using Spring Boot.  
  • Solid experience in development, administration and support of stream processing solutions using Kafka  
  • General cloud architecture experience with AWS; 
  • Experience with Docker and Linux containers in general.  
  • Experience with Terraform and bash scripting skills  
  • SRE experience for a mid-large system at least.  
  • Strong Knowledge of SOAP, REST, JMS architecture Concepts and PUB/SUB Pattern.    


Moreover, we appreciate skills in these areas: 


  • General DevOps Experience
  • A Certified Kubernetes Administrator (CKA)
  • CloudFormation service for infra as a code 


By joining us, you gain:

·      Interesting projects that you will play a crucial role in a multi-national environment;

(Actually, we work with companies from industries such as music, logistics, telecommunications, social services, entertainment, Smart Home, automotive, and bioinformatics.)

·      You will have a code review and work with skilled engineers over 60% of our team are people with over 5 years of experience in the industry;

·      Fully remote work for your convenience or in our office in Wrocław;

·      Choice of employment form: we offer B2B or employment contract;

·      Flexible working hours with no micro-management approach. Our core hours are 9-15, the rest of working time is your decision;

·      We provide high-quality work equipment + additional monitor and accessories;

·      We respect your private life so you dont have to work overtime or in weekends;

·      Constant development through the personal training budget and transfer knowledge;

·      Online and offline integrations - we want to be in touch with you all the time!;

·      Free benefits such as Luxmed, Multisport, life insurance in Nationale Nederlanden;

·      Attractive referral system (5k for senior, 3k for mid, 1k for junior).


If you apply for this position and match with our expectations, then:

1) You will be invited to talk with our Recruitment Specialist Mateusz;

2) You will meet our clients team and will have technical interview.  

Submit your application online in one easy step! Apply now!



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