BySix | Careers

Firewall Engineer (Level 2)

Location

Remote

Experience

Min. 3 years

Main skills

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for a Senior Data Scientist with: - Between 5 and 10 years of professional experience in Data Science, Machine Learning, or Artificial Intelligence. - Proven experience designing and delivering AI solutions in enterprise environments. - Degree or Master's in Data Science, Computer Science, Engineering, Statistics, or a related field. - Strong experience with Python, SQL, Machine Learning, and Deep Learning. - Hands-on experience with Large Language Models (LLMs), Generative AI, Retrieval-Augmented Generation (RAG), and AI Agents. - Experience with Prompt Engineering, Model Evaluation, Fine-Tuning, Embeddings, and Vector Databases. - Solid knowledge of LangChain, LangGraph, Microsoft Agent Framework, and modern AI frameworks. - Experience implementing scalable AI pipelines and MLOps practices. - Experience working with cloud platforms such as Azure, AWS, or GCP. - Familiarity with APIs, Data Engineering concepts, Containers, Git, and CI/CD. - Excellent communication skills with the ability to influence stakeholders and mentor technical teams. We Value - Experience leading technical AI initiatives and defining enterprise AI architectures. - Strong knowledge of AI Governance, Responsible AI, and security best practices. - Experience developing production-grade AI applications from concept through deployment. - Ability to work closely with business stakeholders to translate business challenges into AI solutions. - Passion for innovation and keeping up with the latest advancements in Generative AI and Machine Learning. - Previous experience mentoring Junior and Mid-Level Data Scientists. What do we expect from you? - Lead the design and development of innovative Artificial Intelligence, Generative AI, and Machine Learning solutions. - Define scalable AI architectures leveraging LLMs, RAG, AI Agents, and modern AI frameworks. - Develop end-to-end AI applications that deliver measurable business value. - Design and implement approaches for Prompt Engineering, Model Evaluation, and Fine-Tuning. - Build scalable and production-ready AI pipelines following MLOps best practices. - Ensure high standards for AI development, governance, security, and Responsible AI principles. - Collaborate with multidisciplinary teams to define and implement AI-driven business solutions. - Drive technical innovation and evaluate emerging AI technologies and methodologies. - Mentor and support the growth of Junior and Mid-Level Data Scientists. - Promote knowledge sharing and technical excellence across the team while ensuring scalable, reliable, and high-performing AI solutions. Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Lisbon (Hybrid)

Experience

Between 5 and 10 years

Main skills

Mid AI & ML Engineer

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for a Mid AI & ML Engineer with: - 4 - 5 years of professional experience in machine learning or AI-focused roles (or equivalent demonstrated production ML work). - Bachelor's or Master's degree in Computer Science, Data Science, or related field (or equivalent professional experience). - Strong Python proficiency and solid object-oriented programming fundamentals. - Experience building and deploying time series forecasting and prediction models. - Hands-on experience with production ML workflows and Databricks. - Solid understanding of LLMs, prompt engineering, and agentic system design. - Proficiency with cloud platforms (Azure) and containerization (Docker, Kubernetes). - Experience with model evaluation, monitoring, and drift detection. - Knowledge of workflow orchestration tools (e.g., Apache Airflow). - Ability to write high-quality, maintainable code with comprehensive testing. We Value - Experience deploying LLM applications and agentic systems in production. - Familiarity with observability platforms for LLM tracing (e.g., Langfuse or similar). - Understanding of cost optimization for LLM inference and token caching. - Experience with multi-agent orchestration and tool-use patterns. What do we expect from you? - Design and deploy forecasting and time series prediction models in production. - Build reproducible ML pipelines on Databricks Model Serving with model registration and versioning. - Develop feature engineering workflows and experiment tracking via MLflow. - Monitor model drift and implement automated retraining strategies. - Develop LLM-powered applications using prompt engineering and function calling. - Implement multi-step agentic workflows using orchestration frameworks (e.g., OpenAI Agent SDK, CrewAI, LangGraph). - Design evaluation frameworks to assess LLM outputs and agent behavior in production. - Build data pipelines for model fine-tuning and evaluation dataset preparation. - Deploy ML solutions on Azure Databricks and Azure Machine Learning. - Containerize and orchestrate workflows using Docker and Kubernetes. - Implement observability and tracing for model and agent performance. - Collaborate with teams to integrate ML components into microservices architectures. - Exposure to DevOps practices and CI/CD pipelines. Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Leiria (Hybrid)

Experience

Min. 4 years

Main skills

FullStack Developer

Location

Lisbon (Hybrid)

Experience

Between 2 and 3 years

Main skills

FullStack Engineer

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for a FullStack Engineer with: - University degree in computer science/engineering or comparable. - Strong experience with Java, Spring Boot, and microservice-based architecture. - Frontend development experience, preferably with Angular. - Solid understanding of cloud-native software development. - Practical experience with AWS and cloud-based deployment models. - Experience with Kubernetes, Docker, and Helm. - Good understanding of distributed systems, scalability, resilience, and fault tolerance. - Experience with microservices, REST APIs, asynchronous messaging, event-driven patterns, and streaming technologies. - Strong knowledge of relational databases, especially PostgreSQL. - Experience with caching technologies such as Hazelcast. - Strong quality mindset with experience in automated testing and CI/CD. - Familiarity with monitoring and observability tools such as Prometheus, Grafana, and centralized logging solutions. - Ability to analyze complex systems and improve performance, reliability, and maintainability. - Hands-on mentality combined with architectural thinking. - Experience using AI tooling on a daily basis. - You are a team player, likes to share your knowledge and always look for a good solution for the team, product and company. What do we expect from you? - Together with your team you will design, develop, and integrate event-driven microservices that take smart decisions for delivery preferences based on parcel and consignee data. - You will work closely together with cross-functional teams to build high-performance, cloud-native solutions that improve data quality, reduce manual effort and enhance the end-to-end delivery experience. - You will work on digital products with tangible results that bring joy to people every day. Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Lisbon (Hybrid)

Experience

Min. 5 years

Main skills

IT Project Manager

Location

Lisbon (Hybrid)

Experience

Min. 5 years

Main skills

AI Security Engineer

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for an AI Security Engineer with: - More than 7 years in IT and cyber security, with at least some of that in transformation, digital or platform contexts. - Solid technical grounding in cloud security, identity and access management, application security and secure SDLC. - Working knowledge of AI/ML and Agentic AI security: prompt injection, data leakage, agent identity, tool-use risk model supply chain. - Familiarity with OWASP LLM Top 10, MITRE ATLAS and NIST AI RMF. - Experienced with threat modeling, risk assessment and security architecture for distributed systems. - Strong stakeholder management; able to challenge solution designs constructively and influence without full hierarchical authority. - Pragmatic, outcome-driven, biased for delivery; resilient under ambiguity. - Fluent English (an additional European language is a plus). We Value - A Prior security responsibility in a multi-country, federated environment (logistics, retail, financial services). - Hands-on exposure to LLM and agent platforms (e.g. Azure AI, Anthropic, OpenAI, Vertex, LangChain) and MLOps tooling. - CISSP, CISM or equivalent. - Experience contributing to or running AI red-teaming exercises. What do we expect from you? - Embed security by design across AI use cases, agents, and platform integrations, with strong controls for access, secrets, logging, monitoring, sandboxing, tool and API restrictions, and external integrations. - Translate group security policies and architecture into practical controls, reusable patterns, and guidance for AI teams, ensuring alignment with risk, third-party, supplier, and operational requirements. - Prepare security-gate evidence, drive remediation from reviews, and escalate unresolved control gaps, deviations, or delivery risks. - Address AI-specific risks such as prompt injection, data leakage, insecure tool use, excessive permissions, and weak auditability through hardening and secure deployment patterns. - Support due diligence and secure implementation for external AI vendors, models, orchestration components, and APIs, with the right safeguards for data protection and segregation. - Strengthen AI incident readiness through detection, logging, response scenarios, playbooks, exercises, and close collaboration with SOC and central security teams. - Scale secure AI delivery through reusable patterns, stronger hub capability, and lessons shared back into the groupwide security model. Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Lisbon (Hybrid)

Experience

Min. 7 years

Main skills

Network Engineer

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for a Network Engineer with: - More than 3 years in Network Engineering role. - Switching (Cisco Nexus and Catalyst). - Wifi Infrastructure. - Routing (BGP). - Firewall (Fortinet, Cisco ASA, Forcepoint). - Load Balancing (F5, HAProxy). - Azure Architecture (hub and spoke). - Able to work with autonomy, proactivity, leadership, ownership, coordination and continuous improvement. - Good presentation with excellent communication skills (written, listening and speaking), culture centered attitude, team work and highly motivated. - Fluency in English. We Value - Degree in Computer Engineering or Similar. - Experience with Cloud environments (Preferably Azure). - Experience with Terraform. - Experience working withing an Agile methodology. - French comprehension. What do we expect from you? - Design, implementation, configuration, and maintenance of our current on-prem and cloud-based infrastructure with a focus on resiliency and high-availability. - Promote “continuous improvement” of our network infrastructure. - Promote IAC (Infrastructure as code) and DevOps best practices for automation and scalability of our network infrastructure. - Analyze, troubleshoot, and resolve complex incidents including post-mortem tasks to avoid recurrence. - Analysis of network usage, growth patterns, and capacity planning for future infrastructure decisions. - Work closely with internal and external stakeholders, developers, architects, and managers from different locations and ensure timely deliverables. - Ensure the level 2 and if applicable level 3 support for changes, requests and incidents in production environments and provide adequate response with possibility to participate in the on-call 24/7 support. Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Remote

Experience

Min. 3 years

Main skills

AI developer

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for an AI developer with: - 3 or more years of software development experience, full-stack or backend. - Proven, hands-on experience building with AI tooling: LLMs, RAG, agents, or similar. Not just awareness of the space, but something you have actually shipped. - Comfortable picking up unfamiliar stacks and technologies without needing a structured onboarding programme. - Able to work with significant independence: you manage your own time, your own decisions, and your own output. We Value - You have built something real with AI outside of your day job, a side project, an open source contribution, anything that shows genuine curiosity. - You get excited by the productivity delta that AI is creating right now, and you want to be the person delivering that to companies that have not figured it out yet. - You have worked in early-stage or startup environments and found the ambiguity energising rather than frustrating. - You have experience with cloud infrastructure and understand what it takes to move something from prototype to production. What do we expect from you? - Build functional AI prototypes and client-facing pilots from discovery through to handover - Integrate LLMs, RAG systems, and AI agents into existing client products and workflows - Adapt to whatever stack the client context requires, and get productive in it quickly - Work with significant autonomy: own your technical decisions, raise blockers early, and drive your work to completion - Collaborate directly with the MD and client stakeholders, without layers in between - Move at the pace the work demands: our pilots are measured in weeks, not quarters Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Lisbon (Hybrid)

Experience

Min. 3 years

Main skills

AI Privacy Engineer

About Us BySix Engineers the future and drives innovation. We are more than just a standard software engineering company, we believe that true impact comes from combining technical expertise with human values. That's why we reflect that in our approach - technology is not the end goal, but the enabler. Why Us? 🫸 Multidisciplinary team 📒 Training on demand 💴 Attractive salary and benefits package 📈 Career progression plans 👌 And amazing get together events What are we looking for? We are looking for an AI Privacy Engineer with: - Degree in Computer Science, Engineering or similar technical field (or equivalent experience) with additional legal qualification (eg. LL.B., LL.M., CIP/E) in an EU jurisdiction or fully qualified lawyer in an EU jurisdiction with additional technology experience (eg. CIP/T); - More than 3 years of experience, ideally in an international corporation; - Strong working knowledge of the GDPR; - Solid technical grounding in how modern AI systems work - LLMs, RAG, vector stores, agents, tool use; - Experience with DPIAs, international data transfers and data subject rights at scale; - Strong stakeholder management and ability to challenge solution design - Pragmatic, outcome-driven, comfortable operating under ambiguity; - Fluent English / additional European language is a plus. What do we expect from you? - Own the AI data protection gate for AI use cases developed within Central AI, including preparation of decision-ready evidence and clear go/no-go recommendations; - Translate data protection and regulatory requirements (e.g. GDPR, EU AI Act, GLS Group Data Protection Framework, internal policies) into clear actionable technical guidance for AI engineers and platform teams; - Ensure that data protection requirements are embedded into system design and implementation, enabling AI teams to build compliant solutions by design; - Establish and maintain comprehensive, structured, and up-to-date documentation (e.g. data flows, RoPAs, design decisions, controls, and safeguards) that allows for efficient review and oversight by Data Protection functions; - Carry out privacy risk assessments (e.g. DPIA and AI risk analysis) for AI use cases, identifying risks related to personal data processing, model behavior, and system architecture; - Define and drive the implementation of pragmatic mitigation measures, working hands-on with engineering teams to ensure risks are effectively addressed; - Act as a bridge between engineering and data protection functions, ensuring that technical implementations are transparent, reviewable, and aligned with compliance expectations; - Enable scalable governance by ensuring that technical implementations and documentation provide clear, auditable evidence of compliance and accountability; - Embed data protection by design and by default across AI use cases, agents and platform integrations, with strong attention to lawful basis, purpose limitation, data minimization, retention and transparency; Are you ready? If you're ready to make a real impact by leveraging cutting-edge technology and fostering human-centric solutions, BySix is the place for you. Together, we'll drive innovation and create lasting business value. Note: BySix is an equal opportunity employer. All applicants will be considered and analyzed regardless of ethnicity, religion, gender identity, sexual orientation, national origin, age, or disability status.

Location

Lisbon (Hybrid)

Experience

Min. 0 years

Main skills

AI Data Analyst

About Us We’re more than a software company. We’re a team of visionaries turning bold ideas into real-world impact. Here, insights fuel innovation. With the right data, visualized the right way, we empower smarter decisions, better strategies, and more impactful outcomes. Why Us? 🧠 A culture of curiosity — We ask, we dig, we discover. 🌍 Multidisciplinary teams — Data, business, product — solving problems together. 🎓 Learning culture — Courses, mentoring, and growth opportunities. 💰 Competitive salary and benefits — Your skills deserve recognition. 🚀 Clear career paths — From Analyst to wherever your ambition takes you. 🎉 Team energy — Fun events, open culture, and collaboration that works. What are we looking for? We’re looking for a Data Analyst to turn complex datasets into actionable insights that shape strategy and fuel innovation. If you’re passionate about data storytelling and love finding clarity in complexity — this role is for you. What you’ll be doing Gathering, cleaning, and analyzing structured and unstructured data Designing dashboards and reports using BI tools (Tableau, Power BI, Looker, or similar) Performing exploratory and statistical analysis to identify trends and patterns Partnering with business and product teams to define KPIs and track performance Translating data findings into clear recommendations for stakeholders Supporting data-driven decision-making across the company The skills we need ✔️ Solid SQL and Excel skills ✔️ Experience with BI tools (Tableau, Power BI, Looker, etc.) ✔️ Strong analytical skills and knowledge of statistics ✔️ Ability to visualize and communicate insights effectively ✔️ Comfortable working with cross-functional teams ✔️ Curious, detail-oriented, and proactive in problem-solving 🎯 Bonus points if you’ve worked with Python/R for analysis or automated reporting Are you ready? If you’re ready to make data tell stories that matter — and work in a place that values both insight and impact — then BySix is where you belong. Note: BySix is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees — regardless of who you are or where you come from. You belong here.

Location

Lisbon

Experience

Min. 3 years

Main skills