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AI, ML, & Data Engineering

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AI, ML, & Data Engineering

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Job title: Site Reliability Engineer Job type: Contract Contract Length: 12 months  Rate: $20 p/h  Role Location: Colombia  The company: Financial Services Role and Responsibilities: Partner with Development teams to support application build and continuous improvement. Expand, optimise, and maintain CI/CD pipelines. Troubleshoot and resolve production issues using APM tools. Work daily with AWS cloud infrastructure. Optimise service performance and cloud costs. Ensure high availability, reliability, and security of systems. Analyse current architecture and propose scalable improvements. Design and implement automated workflows and infrastructure processes. Promote and embed DevOps culture across engineering teams. Job Requirements: University degree in Engineering, Computer Science, or related field. Strong hands-on experience with AWS, including: Cognito Aurora PostgreSQL EKS Lambda S3 API Gateway DynamoDB EC2 DocumentDB SNS OpenSearch Experience with Messaging/Streaming technologies: RabbitMQ SQS Kafka Kinesis Infrastructure as Code expertise: CloudFormation Terraform Strong Kubernetes (K8s) experience: Resource optimisation Provisioning new services Improving existing services K8s architecture design Experience with Windows Server (Active Directory, IIS, Windows Services). CI/CD tooling experience: Jenkins Azure DevOps Scripting/programming skills in: Shell Python Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences. We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process. Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or?circumstances, with an equitable chance to achieve the careers?they deserve. Building a diverse future, one placement at a?time. Check out our DE&I page here

Job title: Senior Java Developer Job type: Permanent  Salary: Up to €65,000 Role Location: Athens, hybrid 3 days a week onsite  The company: Rapidly expanding Travel Tech! Role and responsibilities: Work on a large-scale greenfield modernisation project to transform the travel and transportation ecosystem, empowering businesses with innovative, scalable, and efficient technology solutions, overseeing three different teams. What You’ll Be Doing: Platform Overhaul: Transitioning legacy systems to modern, microservices-based architectures. Next-Gen Features: Rolling out tools like revenue management systems and web check-in portals. Build new reservation and ticketing systems designed for reliability and scalability.  System Integration connecting the travel ecosystem with robust APIs and microservices. Job requirements: Strong expertise in Java, Spring Boot, and RESTful API design. Experience with microservice architectures, database management (PostgreSQL or similar), and Docker. Knowledge of Agile methodologies and a collaborative mindset. If interested, apply to be considered!  Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences. We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process. Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or?circumstances, with an equitable chance to achieve the careers?they deserve. Building a diverse future, one placement at a?time. Check out our DE&I page here

Job title: QA Engineer - Playwright Job type: Permanent  Salary: Up to €60,000 Role Location: Athens, hybrid 3 days a week onsite  The company: Rapidly expanding Travel Tech! Role and responsibilities: I'm looking to recruit a QA Engineer who thrives on complexity and loves getting deep into data-intensive systems, with strong Playwright experience.  What You’ll Be Doing: Data-intensive applications processing millions of transactions annually Working closely with engineers and product teams to ensure performance and reliability across complex, data-heavy features Building scalable, robust test automation with Playwright Working closely with engineers, product, and data teams to ensure quality at every step Driving test strategy across APIs, UIs, and backend workflows Job requirements: Proven experience with Playwright and other modern testing tools A passion for clean, reliable, and scalable test architecture Experience working on complex systems—especially data-heavy platforms A mindset for automation, performance, and continuous improvement   If interested, apply to be considered!  Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences. We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process. Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time. Check out our DE&I page here

Job title: Network Operations Engineer Job type: Perm Salary: €90k-€120k Role Location: Dusseldorf or Munich The company: IT Consultancy Role and responsibilities: Technical networking ability to troubleshoot WAN, LAN, Network Security, Cloud Internet Security Platform and Tools  Service restoration, sustainability, and proactive service improvement. Participating and at times leading Major Incident conference calls and can identify required resources. Provide full Root Cause Analysis for any production outages. Patch management Managed Service Provider technical resource and capabilities evaluation Availability tracking and technical elimination of repeat incidents Job requirements: Minimum of 8 years’ experience in IT Operations Technical Engineering positions Expert Knowledge of Carrier Services – SDWAN VeloCloud & WAN Circuits, MPLS, Point to Point Expert Knowledge of networking infrastructure suppliers and service offerings including; Cisco, Aruba & Infoblox Experience working with Enterprise Wireless Network Services (wireless first concept) Experience working with Cloud Internet Security Planform, such as Zscaler Demonstrable understanding of network load balancers and firewalls Experience with monitoring applications such as SolarWinds & Riverbed Experience of working as part of a Global 24*7 support model Professional Technical Certification preferred History of working in both an insource IT model and a blend of Managed Service Delivery would be beneficial Competencies: Dealing with Ambiguity – MUST have B2 or above level of German language skills Strong Communication Skills Technical competencies around Data Routing & Switching Tooling in an enterprise network Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.     We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process.     Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or?circumstances, with an equitable chance to achieve the careers?they deserve. Building a diverse future, one placement at a?time.   Check out our DE&I page here    

Job title: Network Architect Job type: Perm Salary: €130k-€160k Role Location: Dusseldorf or Munich The company: IT Consultancy Role and responsibilities: Design solutions in Sites & Campuses, Security Perimeters, and WAN Design and optimize network infrastructure to support company’s operations and projects that are highly available, secure and meet regulatory compliance Design micro-segmentation solutions to meet the security requirements Work within a team or internal and external resources to lead the network deployment in numerous network mergers and acquisition onboarding projects Design solutions in a manner that ensure compliance with regulatory requirements such as DORA, BAFIN and VAIT Work with Technical Project Managers to understand project priorities and help sequence network engineering components accordingly Job requirements: Proven technical proficiency in the fields of LAN, Firewalls, Data Center, WiFi and WAN design, management and standardization Experience working as part of a global team with internal and external members Extensive experience in designing, implementing and troubleshooting LAN solutions in Data Centres as well as in Site LAN/WiFi environments using Aruba switching platforms and Gateways. Experience in designing network security solutions like Fortinet firewalls and zScaler History of working in both an insource IT model with a blend of Managed Service Delivery Competencies: Dealing with ambiguity Strong communication skills – MUST have German language skills to at least B2 Strong Technical competencies around network routing, switching security, and data centre technologies Technical understanding about Firewall technologies, DMZ environments and Wi-Fi Understanding of Mergers & Acquisitions and the technical aspects of integrating an organization Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.     We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process.     Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or?circumstances, with an equitable chance to achieve the careers?they deserve. Building a diverse future, one placement at a?time.   Check out our DE&I page here    

Job title: Network Design Engineer Job type: Perm Salary: €100k-€130k Role Location: Dusseldorf or Munich The company: IT Consultancy Role and responsibilities: • Experience in developing network solutions with high availability and resiliency • Experience with Wireless Technologies, Signal optimization, Wireless coverage design • Understanding of network design for optimal performance and availability • Support Office Moves and renewals according to defined standard designs • Assist the Operations teams with root cause analysis and other troubleshooting activities as needed • Aligning with Vendors around service lifecycles and roadmaps • Vendor management for production hardware lifecycle • Managed Service Provider technical resource and capabilities evaluation • Availability tracking and technical elimination of repeat incidents Job requirements: • Proven Technical capability in the field of Aruba Wireless design, management and standardization • Experience of working as part of a Global function • Experience with creating predictive surveys using planning software such as Airwave VisualRF (preferred), Ekahau or AirMagnet • Experience designing, implementing, and troubleshooting high density wireless enterprise office networks. • Strong knowledge with routing protocols and building tiered network design. • Experience with SD WAN (Velo Cloud) and associated transport technologies. • Deep working knowledge of 802.11 protocols, RF propagation, and antenna technologies using multipath, spatial multiplexing, and diversity. Experienced in RF optimization as well as interference and coexistence analysis, and ability to apply this to resolve issues in poor RF environments. • Experience supporting and troubleshooting voice applications over wireless; such as Microsoft Teams. Soft Skills: • Capable of analysing business and technical requirements and design/Implement project based on defined processes. • Demonstrated strong personal mastery, including ethics, interpersonal skills, and engagement in continuous learning. • Able to communicate and present complex issues with assurance and confidence – MUST have at least B2 or above level of German language skills • Ability to drive troubleshooting calls and have good skills in questioning, listening, idea development and influencing. • Ability to work with a team to provide written documentation and skills transfer to the larger technical organization. Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.     We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process.     Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or?circumstances, with an equitable chance to achieve the careers?they deserve. Building a diverse future, one placement at a?time.   Check out our DE&I page here    

Job title: Senior Blockchain Engineer Job type: Perm Salary: $175,000 - $185,000 Role Location: California, United States (Los Angeles or San Francisco) Visa requirements: US Work Authorization required The company: Our client, is a well-funded, next-generation technology company with a mission to build secure and inclusive digital ecosystems. As the driving force behind a niche product they combine Blockchain and biometrics to deliver platforms that redefine trust, payments, and data. They are building three core platforms: Face Scan (Proof of You): Biometric identity verification ensuring every user is a real human. BioPay: Blockchain-powered payment solution for fast, secure, and inclusive transactions. Zeus Database: A scalable, analytics-ready data infrastructure powering AI and blockchain applications. Role and responsibilities: We are seeking an experienced Senior Blockchain Engineer to architect and implement the blockchain foundation of the firm’s ecosystem. You will design secure, scalable, and user-friendly blockchain solutions that integrate biometric identity, payments, and data services. We’re building a dedicated RWA Layer 1 chain focused on asset definition, settlement, and verification at the base layer, with Layer 2 compatibility and strong real-world integration. The ideal candidate is passionate about building new blockchain infrastructure from scratch and can translate research concepts into practical system blueprints, collaborating effectively with our core engineering team. This is a hands-on engineering role for someone who has deep blockchain expertise, thrives in 0?1 innovation, and is motivated to build real-world applications at global scale. Key responsibilities: Design, build, and maintain blockchain protocols, smart contracts, and distributed systems powering the firm’s ecosystem Develop tokenized payment systems and identity verification flows, ensuring high security and usability. Implement smart contracts for token utility, payments, and governance. Ensure security, scalability, and efficiency of blockchain systems through rigorous testing and best practices. Integrate biometric verification (Face Scan) and payment flows (BioPay) into blockchain applications. Collaborate with Product, Engineering, and QA teams to align blockchain development with roadmap and user needs. Mentor junior engineers and contribute to best practices for blockchain development Stay ahead of emerging trends in real-world asset (RWA) tokenization, DeFi, and decentralized identity to guide innovation. Job requirements:   Bachelor’s or Master’s degree in Computer Science, Cryptography, or related technical field. Public technical footprint — GitHub contributions, open-source code, technical articles, or recorded talks that demonstrate hands-on expertise. 5+ years of blockchain development experience (protocol, dApps, Layer 1/Layer 2, or DeFi/Web3). Proficiency in Golang, Rust, and Solidity. Strong understanding of smart contract security, cryptography, and distributed systems. Experience with Ethereum, Solana, or other major blockchain platforms. Proven track record of delivering production-grade blockchain systems. Highly Preferred: Real-world asset (RWA) tokenization experience. Familiarity with fintech, identity verification, or biometric systems. Who You Are: Innovator: Excited to work on blockchain systems that combine identity, payments, and real-world applications. Explorer mindset: Comfortable with ambiguity, thrives in 0-1 environments, and moves quickly. Security-first engineer: Obsessed with trust, reliability, and protecting user data. Vision-aligned: Believes in AC Tech’s mission of building secure and inclusive digital ecosystems. Benefits: Competitive salary and equity opportunities. 401(k). Vision, Dental, and Medical Insurance. Paid Time Off (PTO). Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.     We make an active choice to be inclusive towards everyone every day. Please let us know if you require any accessibility adjustments through the application or interview process.     Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time.   Check out our DE&I page here  

Job title: BI Developer Job type: Contract Contract Length: 12 months (possibility of extension) Rate: $15 - $20 Role Location: Bogata - Colombia, Buenos Aries - Argentina, Santiago – Chile, Mexico City – Mexico The company: Our client is a dynamic and well-established logistics company specializing in comprehensive worldwide shipping and freight solutions. Headquartered in Illinois, they are a mid-sized organization with 200-500 employees that provides a full spectrum of transportation services across all modes. They offer clients significant economies of scale, flexible carrier choices, and an extensive network of over 140 stations across the U.S. for 24/7 support. Their proprietary Transportation Management System (TMS) provides real-time visibility and control of shipments from any device. Known for delivering custom-tailored logistics solutions rather than one-size-fits-all approaches, excelling in LTL, Truckload, Airfreight, Ocean Freight, Intermodal, Expedited, White Glove, and Trade Show services. Role and Responsibilities: Recreate existing Tableau reports and dashboards in Power BI to support seamless transition and improved visualization. Collaborate on consolidating large datasets from legacy systems and archives into a new Microsoft SQL-based data lake, utilizing Databricks for efficient data loading and processing. Optimize ETL processes to accelerate data imports, ensuring timely availability for reporting and analysis. Partner with internal data teams to interpret logistics and supply chain data, ensuring accurate representation in reports. Develop and maintain high-quality BI solutions that meet business needs for performance and usability. Job Requirements: 5+ years of experience as a BI Developer or similar role. Strong proficiency in Power BI for report and dashboard development; experience migrating from Tableau is highly preferred. Expertise in ETL processes, data warehousing, and tools like Databricks for data loading and transformation. Solid understanding of Microsoft SQL Server or similar database technologies. Knowledge of logistics, supply chain, or freight industry data is a nice-to-have, but not essential—we provide domain expertise for collaboration. Excellent problem-solving skills and ability to work independently in a fast-paced environment. Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.     We make an active choice to be inclusive towards everyone every day. Please let us know if you require any accessibility adjustments through the application or interview process.     Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time.   Check out our DE&I page here      

Job title: Senior Platform Engineer   Job type: Contract (B2B)   Contract Length: Long term, rolling contract   Rate: €300+ per day (depending on experience)   Role Location: Poland, Wroclaw (Fully remote, must be based in Poland)   The company: A leading software company with bespoke products for the finance industry.   Role and Responsibilities: Signify have partnered up with a European Fintech organisation specialising in offering a solution to large institutions across the globe. We are hiring for a Senior Platform Engineer to help spearhead projects in the cloud (Azure) and to work on their core platforms using CI/CD, IaC and their networking knowledge. This role will lead into a team lead role in the near future - filling the gap between the senior engineers and platform engineering manager.   Job Requirements: 6+ years commercial experience in Platform Engineering Azure, CI/CD, Terraform, Kubernetes, IaC, Networking, Elasticsearch Must have project or team mentorship experience (willing to move into a Team Lead role in the future) Good communication skills in English A team player and ability to collaborate   Interview process: 1st stage interview, 2nd stage interview, Offer stage     If you are interested, please apply to this advert or email your CV to iqbal.miah@signify-tech.com   Please note - all applicants must be based in Poland         Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences.   We make an active choice to be inclusive towards everyone every day. Please let us know if you require any accessibility adjustments through the application or interview process.     Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or circumstances, with an equitable chance to achieve the careers they deserve. Building a diverse future, one placement at a time.

Job title: Software Engineer  Job type: Contract Contract Length: 12 months Rate: $60-80 per hour Role Location: Florida (Hybrid) The Company: We are a global technology-driven organization operating at the intersection of digital platforms and real-world service delivery. Our products power complex, customer-facing experiences used internationally across web and mobile environments. The company is investing heavily in modernizing its digital ecosystem, with a strong emphasis on scalable architecture, platform reliability, and engineering excellence. Technology is a core strategic function, and the engineering team plays a critical role in shaping long-term product direction. You’ll join a distributed, cross-functional team focused on building resilient systems, improving developer experience, and delivering measurable business impact through high-quality software. The role: We are seeking a Senior Software Engineer with deep experience designing and scaling modern distributed systems. This is a hands-on technical leadership role focused on architecture, performance, and long-term platform strategy. You’ll work across product, infrastructure, and data teams to design and evolve a scalable application ecosystem supporting both internal operations and external users. Responsibilities Lead the design of scalable, distributed systems across multiple domains. Define technical strategy and architectural standards across applications and services. Drive decisions around system boundaries, service contracts, and data flow. Improve observability, reliability, and fault tolerance across the platform. Design and build services using Node.js (TypeScript) or Go. Develop event-driven systems using Kafka or similar streaming technologies. Work with both relational (PostgreSQL) and NoSQL data stores. Implement API-first design (REST and/or gRPC). Build and maintain modular front-end applications using Vue.js or Svelte. Implement scalable design systems and shared component libraries. Optimize application performance and bundle efficiency. Ensure accessibility and responsive behavior across devices. Architect and deploy containerized services using Docker and Kubernetes. Work within Google Cloud Platform (GCP) or Azure environments. Implement Infrastructure as Code using Terraform. Build and maintain CI/CD pipelines using GitHub Actions or GitLab CI. Drive DevOps best practices and automation initiatives. Mentor engineers and elevate engineering standards across teams. Lead architecture reviews and technical design discussions. Collaborate closely with Product and Data teams on roadmap alignment. Influence long-term platform modernization strategy. Identify technical debt and drive remediation initiatives. Improve monitoring and observability using tools such as Datadog or Prometheus. Strengthen testing strategies (unit, integration, and end-to-end). Champion secure coding practices and compliance standards. Requirements: 10+ years of professional software engineering experience. 3+ years in a senior or principal-level technical leadership role. Strong experience designing distributed systems at scale. Proficiency in Node.js (TypeScript) or Go. Experience with modern front-end frameworks such as Vue.js or Svelte. Hands-on experience with Kubernetes and containerized workloads. Experience working in GCP or Azure cloud environments. Strong understanding of event-driven architecture and message brokers. Solid knowledge of PostgreSQL and schema design. Experience implementing CI/CD pipelines and Infrastructure as Code. Excellent problem-solving and cross-functional collaboration skills. Preferred: Experience building internal developer platforms. Familiarity with domain-driven design. Exposure to data pipelines or analytics infrastructure. Experience working in globally distributed teams. Accessibility Statement: Read and apply for this role in the way that works for you by using our Recite Me assistive technology tool. Click the circle at the bottom right side of the screen and select your preferences. We make an active choice to be inclusive towards everyone every day.? Please let us know if you require any accessibility adjustments through the application or interview process. Our Commitment to Diversity, Equity, and Inclusion: Signify’s mission is to empower every person, regardless of their background or?circumstances, with an equitable chance to achieve the careers?they deserve. Building a diverse future, one placement at a?time. Check out our DE&I page here