Top Software Engineer Jobs in Portugal

Owns technical direction and execution for major products and systems. Designs scalable, reliable architectures, writes production code, drives architecture decisions, solves complex engineering problems, improves testing, security, observability, and development practices, and mentors engineers across teams. The role requires leading major initiatives from design through production while collaborating across distributed international teams.

Develop and enhance MAAS core components, improve architecture, collaborate across teams, and ensure high standards in documentation and CI practices.

Lead development of vector similarity search capabilities in Elasticsearch, including designing new features, implementing algorithms and data structures, fixing bugs, and improving search relevance, speed, and maintainability. Collaborate asynchronously with a globally distributed engineering and open-source community, provide technical leadership, and guide initiatives from design through delivery. Write modern Java and serve as a subject-matter expert for vector search and Elasticsearch.

Lead development of Elasticsearch vector search capabilities, including new features, algorithms, data structures, performance improvements, and bug fixes. Collaborate with globally distributed engineers and open-source contributors, provide technical leadership, and guide initiatives from design through delivery. The role requires deep expertise in vector similarity search, modern Java, data storage technologies, concurrency, and scalable search platforms.

Lead Elasticsearch search relevance initiatives focused on vector search, designing and implementing scalable search features, algorithms, and data structures. Build and improve Elasticsearch and Lucene functionality, resolve complex bugs, optimize performance, and collaborate with distributed engineering and open-source communities. Write modern Java, guide projects autonomously from design through delivery, and contribute to technical direction across teams.

Lead Elasticsearch search relevance initiatives by designing and implementing search features, algorithms, and data structures; improving vector search speed and relevance; fixing complex bugs; contributing to Lucene; collaborating with globally distributed engineers and open-source contributors; and writing modern Java. The role requires autonomy, technical leadership, code review participation, and expertise with search or vector databases and storage technologies.

Design, build, and own scalable backend services, APIs, and high-performance web frontends for an autonomous procurement platform. Improve reliability, security, and performance, implement async task pipelines, and collaborate with product and design. Mentor juniors, participate in code reviews, and leverage AI-assisted tools while shipping iteratively in a globally distributed, async-first team.

Lead technical direction and hands-on execution for major products and systems. Design scalable, reliable architectures across backend, frontend, APIs, databases, and infrastructure; write code; make architecture trade-offs; solve production issues; improve testing, security, observability, and development practices; lead critical initiatives; and mentor engineers across teams.

Leads technical direction and hands-on execution for major software products and systems. Designs scalable backend, frontend, API, database, and cloud solutions; writes code; makes architecture trade-offs; resolves production issues; improves testing, security, reliability, and observability; and mentors engineers across teams. The role is fully remote, globally distributed, and requires strong English communication.

Design and evolve core cloud platform services, control-plane components, internal APIs, and platform abstractions. Build production-grade Go services and tooling, drive architectural initiatives such as gRPC migration and eventing foundations, and improve scalability, reliability, and developer productivity. Collaborate across engineering teams, support production systems and incident response, and drive long-term technical solutions for managed cloud and enterprise deployments.

Design and scale backend systems, APIs, and services for Nango’s open-source developer infrastructure platform. Build APIs, SDKs, UIs, and runtime systems, optimize performance and reliability, solve integration challenges with customers, shape the roadmap, and maintain the open-source repository. The role requires strong ownership, product thinking, developer empathy, communication, and autonomy in a remote-first startup environment.

Build end-to-end AI-first features for a benefits platform, working across frontend (React/TypeScript) and backend (Python/FastAPI/SQLAlchemy). Ship production code, integrate ML components (LLMs, recommenders, RL), maintain CI/CD and cloud deployments (GCP preferred), collaborate with product/design, write tests and documentation, and participate in peer review and iterative development.

Build and own release-defining projects for SingleStore’s multi-cloud managed database service. Develop scalable distributed systems across control and data planes, cloud infrastructure, networking, storage, Kubernetes, and customer-facing platforms. Lead initiatives from design through production, improve engineering standards, testing, observability, and CI/CD, solve reliability challenges, mentor engineers, communicate technical trade-offs, and collaborate cross-functionally to deliver high-quality products and customer outcomes.

Develop complex cloud applications for the Altium 365 platform. Responsibilities include building cloud-native applications and scalable infrastructure, designing APIs and data models, developing stateful and stateless services, working with relational databases and ORM frameworks, and contributing to AI-powered search and large-scale data processing. The role requires technical ownership, collaboration, solving complex challenges, influencing technical direction, and establishing engineering standards and governance.

Develop and architect features for Malwarebytes Browser Guard, serving millions of users. Write high-quality, tested code; design integrations; collaborate with Product, UX, and QA; review code; mentor engineers; and support delivery of the product roadmap. The role emphasizes React, JavaScript/TypeScript, Go, debugging, system architecture, AI workflows, user-centric design, and strong communication.

Join Hiscox London Market Engineering to design and deliver cloud-first C#/.NET solutions, write and review maintainable code and unit tests, mentor teammates, shape solution and architecture, champion security and engineering standards, adopt AI-assisted development, and collaborate with distributed squads to deliver business value.

Build and enhance GraphAware Hume, a graph-powered analytics platform. Responsibilities include developing APIs, designing secure and scalable access-control systems, orchestrating workflows for graph analytics and real-time insights, optimizing application performance, contributing to architecture and technical design, and collaborating with distributed engineering teams.

The Backend Engineer will develop and maintain features for Restream web services, design backend APIs, ensure infrastructure resilience, and contribute to a collaborative team environment.

Design, implement, unit-test and document embedded software components for public address and voice alarm systems. Integrate and commit code, debug builds and defects, create reusable software components, consult on OSS usage, and keep up with technical developments while producing Clean Code and collaborating within the team.

Develop complex cloud applications and scalable infrastructure for the Altium 365 platform. Build distributed, high-load systems and platform features involving APIs, databases, microservices, authentication, caching, messaging, search, and multi-tenancy. Perform performance profiling, optimization, load and stress testing, influence architecture across teams, and establish engineering standards, best practices, and technical governance.

Develop and optimize Soroban smart contracts and integrate anchor services on the Stellar network for cross-border payment solutions. Collaborate with cross-functional teams, test and debug smart contracts, document development processes, provide technical support, and stay current with blockchain and payments technology trends to ensure secure and efficient implementations.

Implement and optimize EVM-compatible features, reduce gas usage, develop and test smart contracts, collaborate on Ethereum infrastructure, and provide technical support.

Build and maintain high-security mobile wallet apps using React Native, Swift, or Kotlin. Implement biometric authentication and secure key storage, collaborate with cross-functional teams, debug performance issues, and propose UX and security improvements.

Develop and maintain scalable front-end applications using AngularJS, integrate RESTful APIs, and collaborate with cross-functional teams while ensuring performance optimization and usability.

As a Backend Software Engineer, you will develop scalable solutions, manage the SDLC, conduct testing, troubleshoot bugs, and collaborate with team members to align technology with business goals.