Senior Java Backend Developer
AI Summary
Leads the design and implementation of complex Java Microservices, defines architectural patterns and security best practices, owns IAM architecture with Keycloak/Okta/OIDC, mentors junior and mid-level developers, and drives technical discussions with product owners and architects.
About this role
Overview
Expleo is a trusted partner for your innovation journey. As a global engineering, technology and consulting service provider, we are ideally positioned to help you achieve your ambitions and future-proof your business. With a smart blend of bold thinking and reliable execution, we’re able to fast-track innovation through each step of your value chain.
We are strategically positioned to build value, with global footprint across 30 countries.We are as global and local as you need us to be, with strong best-in-class pan-European technological centres and unique best-shoring capabilities.
We leverage a network of high value-adding affiliates in consulting and industrial excellence, and leading partners across multiple sectors to provide you with the most comprehensive services and solutions in an ever-changing environment.
Responsibilities
-Lead the design and implementation of complex Java Microservices.
-Define and promote architectural patterns, coding standards and security best practices.
-Take ownership of IAM architecture, including Keycloak, Okta and OIDC.
-Drive technical discussions with Product Owners, Architects and engineering teams.
-Identify and solve performance, scalability and security challenges.
-Lead code reviews and promote engineering quality standards.
-Work with tools such as SonarQube and Snyk.
-Mentor Junior and Mid-Level developers.
-Create and maintain technical documentation, including ADRs and technical runbooks.
Essential skills
-8+ years of professional experience.
-Strong hands-on experience with Java and Microservices.
-Solid knowledge of Software Architecture and distributed systems.
-Experience making technical and architectural decisions.
-Strong experience with IAM / Identity & Access Management.
-Hands-on experience with Keycloak, Okta and OIDC.
-Knowledge of authentication, authorization and federation.
-Experience with code reviews, secure coding and quality practices.
-Strong communication and technical leadership skills.
-Experience mentoring and guiding other engineers.
Desired skills
-Experience as a Java Technical Lead, Java Architect or Software Architect.
-Experience in E-commerce / Unified Commerce environments.
-Experience with cloud-native architectures.
-Experience with Keycloak realm architecture and Okta federation.
-Experience working with Product Owners and Enterprise/Solution Architects.
Skills
Explore related jobs
More jobs at Expleo
Similar ADR jobs
Jobs in Lisbon
Translation Project Coordinator (Fresh Graduates)Transperfect · Lisbon, Lisboa- EScientistEn Hovione · Lisbon, Portugal
- ESenior Compliance & CQV EngineerEn Hovione · Lisbon, Portugal
- ESenior Qualific & Validation SpecialistEn Hovione · Lisbon, Portugal
Application Security EngineerThought Machine · Portugal, Lisbon
Application Security EngineerThought Machine · Portugal, Lisbon
Browse these categories
Market data for backend engineer roles
All reports →- Role reportBackend engineer jobs, Sep 2026: new listings up 22.7% in a weekBackend engineer new listings rose 22.7% this week to 481, with 4,949 active roles. Senior positions make up over half. Apply early to new openings.
- SeriesSalary reportsWhat employers publish in job postings, by level and workplace. Not self-reported pay.
- Market overviewState of tech hiring, September 2026: up 4.8%Tech hiring rose 4.8% month over month in September 2026, with 411,122 new listings. Customer support and account executive roles led the growth.