1,946,553open jobs
114,344companies
243,360added this week
Browse all
Salary
≈ $33k – $84k per year (Estimated)
Location
In office (Lisbon)
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 23, 2026. First seen by Alion on Aug 26, 2026.

Overview
Company
Impact
Profile match

99X

99X provides product engineering and digital innovation services. Its teams build software for Nordic and European technology companies. The company is known for a strong engineering culture.

We are looking for a Software Engineer to join our team and help build and scale a high-performance, data-driven payment optimisation platform.

In this role, you will work closely with distributed teams across multiple regions, contributing to the development of a modern microservices-based platform that processes transactions in near real time. You will play a key role in designing, developing, and maintaining robust backend services, while helping to drive engineering excellence and continuous improvement.

Responsibilities:

Participate in backlog refinement, sprint planning, and technical design discussions

Write clean, maintainable, and efficient code following best practices

Ensure code quality through testing, code reviews, and continuous integratio

Build and evolve backend services

Design and develop microservices using Java and Spring Boot

Develop and maintain REST and gRPC APIs

Contribute to event-driven architectures using messaging systems

Collaborate across teams:

Work closely with engineers, product owners, and stakeholders across distributed teams

Contribute to the delivery of end-to-end features in an agile environment

Promote knowledge sharing and engineering best practices

Ensure scalability and reliability:

Build resilient and scalable systems deployed in cloud environments

Monitor system performance and troubleshoot production issues

Contribute to observability using logs, metrics, and monitoring tools

Support continuous improvement:

Improve CI/CD pipelines and automation practices

Participate in system design discussions and architectural decisions

Continuously learn and apply modern engineering practices

Requirements:

Strong experience with Java and Spring Boot

Experience building microservices architectures

Experience with RESTful APIs and/or gRPC

Familiarity with event-driven systems (e.g. messaging platforms)

Experience with cloud platforms and CI/CD pipelines

Knowledge of monitoring and observability tools

Experience working in Agile environments (Scrum/Kanban)

Strong problem-solving and analytical skills

Ability to work effectively in distributed teams

Strong communication skills in English (written and spoken)

Nice-to-have:

Experience with Apache Kafka or similar messaging systems

Familiarity with cloud platforms such as PCF or Kubernetes

Experience with monitoring tools (e.g. Prometheus, Grafana)

Understanding of payment systems or high-volume transaction platforms

Experience with automated testing frameworks

Strong interest in performance optimisation and scalability

Experience contributing to platform-level or data-driven systems

If this sounds like you, share your CV with us and let’s talk!

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
1,946,553 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Backend
Similar stack
Same company
Lisbon
Software Engineer 1 hour ago
Remote (India) • Full-Time • Madurai
Python
JavaScript
C#
DevOps
Azure
CI/CD
Jenkins
Git
AWS
Docker
Kubernetes
GitHub
GitLab
Management
Agile
Scrum
Apply
≈ $134k – $231k per year (Estimated) • Remote (United States) • Full-Time • 8+ years exp • Bachelor's Degree • United States
AI/ML
Computer Use
Apply
Remote (Ghana) • Contractor • Accra
JavaScript
TypeScript
SQL
Node JS
Node JS
Nest.JS
Databases
PostgreSQL
Redis
Supabase
AI/ML
Claude
AI Agents
Gemini
LLM
OpenAI
Structured Outputs
Frontend
GraphQL
Tailwind CSS
Next.js
React.js
Astro
DevOps
Rest API
GitHub Actions
CI/CD
Docker
GitHub
Linux
Apply
≈ $59k – $110k per year (Estimated) • Remote (likely EAEU) • 2+ years exp • Moscow
Databases
PostgreSQL
Apache Kafka
DevOps
CI/CD
Kubernetes
Apply
Hybrid • Full-Time • Bachelor's Degree • Sydney
Python
Go
JavaScript
Management
Agile
Apply
In office • Stockholm
Java
Apex
Apex
Lightning Web Components
Visualforce
AI/ML
Agentforce
DevOps
Rest API
SOAP
Apply
$28k – $38k per year • Remote (likely EAEU) • Full-Time
Databases
PostgreSQL
MinIO
Apache Kafka
OpenSearch
DevOps
Helm
Loki
VictoriaMetrics
Yandex Cloud
CI/CD
ArgoCD
Kubernetes
Grafana
Linux
Apply
DevOps Lead 1 day ago
≈ $21k – $62k per year (Estimated) • In office • 6+ years exp • Bachelor's Degree • Bengaluru
DevOps
CI/CD
AWS
Platform Engineering
Management
Agile
Scrum
Apply
In office • 2+ years exp • Xiamen
Python
Java
C++
Cybersecurity
Wireshark
Apply
≈ $17k – $38k per year (Estimated) • In office • 5+ years exp • Bachelor's Degree • Bengaluru
JavaScript
SQL
Databases
Oracle
DevOps
Rest API
SOAP
Management
Oracle ERP
Apply
≈ $34k – $85k per year (Estimated) • In office • Full-Time • 3+ years exp • Bachelor's Degree • Lisbon
Java
Java
Spring Boot
Quarkus
DevOps
Azure
CI/CD
Management
Agile
Apply
≈ $80k – $206k per year (Estimated) • Remote (location not specified) • Full-Time
JavaScript
Java
TypeScript
SQL
Java
Spring Boot
Quarkus
Databases
PostgreSQL
Frontend
Angular
DevOps
Rest API
GitLab CI
CI/CD
ArgoCD
Kubernetes
Management
Agile
Apply
≈ $143k – $275k per year (Estimated) • Remote (location not specified) • Full-Time • 5+ years exp
Python
Go
Java
Kotlin
TypeScript
C#
AI/ML
Prompt Engineering
Function Calling
AI Agents
AWS Bedrock
LLM
RAG
OpenAI
Human-in-the-Loop
Frontend
GraphQL
DevOps
Rest API
gRPC
Azure
AWS
Apply
Remote (location not specified) • Full-Time
Python
SQL
Bash
Databases
PostgreSQL
Apache Kafka
AI/ML
Flink
DevOps
Terraform
Ansible
Terragrunt
Prometheus
GitLab CI
Azure
CI/CD
GitOps
ArgoCD
Kubernetes
Grafana
Azure AKS
FinOps
Linux
Apply
≈ $79k – $187k per year (Estimated) • Remote (location not specified) • Full-Time
Java
SQL
Java
Spring Boot
Quarkus
Databases
PostgreSQL
Apache Kafka
DevOps
Rest API
Helm
GitLab CI
CI/CD
ArgoCD
Kubernetes
Apply
Product Engineer 1 day ago
≈ $35k – $80k per year (Estimated) • Equity • Hybrid • Full-Time • 4+ years exp • Lisbon
JavaScript
TypeScript
Ruby
Elixir
Frontend
Next.js
React.js
Mobile
React Native
Expo
DevOps
CI/CD
Apply
≈ $23k – $66k per year (Estimated) • Hybrid • 3+ years exp • Lisbon
JavaScript
TypeScript
C#
C#
.NET
Databases
MS SQL
Frontend
Angular
DevOps
Rest API
Windows
Management
Agile
Apply
≈ $34k – $86k per year (Estimated) • Hybrid • Lisbon
Python
Java
SQL
C#
Perl
Java
Apache Tomcat
C#
.NET
Databases
Cassandra
DevOps
Windows
SpaceTech
Cameo Systems Modeler
Apply
≈ $15k – $39k per year (Estimated) • In office • Full-Time • 2+ years exp • Lisbon
Analytics
Power BI
Apply
General Manager 1 day ago
≈ $31k – $69k per year (Estimated) • In office • Full-Time • Lisbon
Apply
See all jobs
This is one of many
1,946,553 more open roles from verified company boards, updated every day.