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AI, ML, & Data Engineering

ADVANCE SOFTWARE ENGINEERING

AI, ML, & Data Engineering

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Ruby on Rails Engineer, Automation Systems Job Type: Permanent Salary: $100k–$160k + Equity (DOE) Role Location: Chicago (Onsite Only) The Company We've partnered with a fast-growing early-stage fintech startup building a platform that helps financial institutions activate new accounts and establish primary customer relationships faster. Their technology automates complex workflows across hundreds of third-party websites — securely navigating web environments, submitting forms, and coordinating financial data across external systems. The core automation engine is already live and functioning. The next phase is scaling the platform by expanding integrations and strengthening the backend infrastructure that powers these workflows. They operate with a small, senior engineering team and are looking for a Rails engineer who enjoys building backend systems that support complex real-world automation. The Role They're hiring a Ruby on Rails Engineer, Automation Systems to help build and scale the backend services that power their automation platform. The system already works at an MVP level, and the focus now is on turning it into a reliable, production-grade platform while dramatically expanding the number of supported integrations. This role centers on building and maintaining the Rails services, internal tooling, and data structures that support the automation engine. It's a hybrid backend engineering + systems ownership role. You'll help build the platform while also working closely with the automation workflows themselves, improving reliability and scalability as the system grows. This is an early and high-impact role where you’ll work directly with senior engineers and help define the foundation for a larger automations and integrations team as the company scales. What You'll Do Build and maintain backend services using Ruby on Rails Develop internal tools and systems that generate and maintain structured automation data Expand integration coverage across a large and growing set of third-party websites Improve reliability by building break detection and recovery strategies for automations running in production Collaborate with engineers working on browser automation and frontend tooling Design scalable processes and documentation as integrations grow from dozens to thousands Contribute to improvements in the core automation engine Help shape technical decisions as part of a small, highly collaborative engineering team Ideal Background 3+ years of professional Ruby on Rails development experience Strong backend engineering fundamentals and experience building production web applications Experience designing APIs and backend services Comfort working with JavaScript or TypeScript in web environments Experience building internal tools or automation-heavy systems Strong debugging skills and ability to work through edge cases across distributed systems Comfortable designing processes and documenting technical workflows Self-starter mindset — able to operate effectively in ambiguous problem spaces Nice to Have Experience with web automation tools such as Puppeteer, Playwright, Selenium, or similar Experience building or maintaining browser extensions Experience with Python or Node.js Experience working with LLM-assisted pipelines, prompt engineering, or structured output validation Background in data engineering, web scraping, or automation-heavy roles Benefits Competitive base salary + equity Remote-friendly team Health, dental, and vision benefits High ownership role within a small engineering team Opportunity to help build and scale a complex automation platform from the ground up

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Job title: Senior Platform Engineer   Job type: Permanent   Salary: £70k-£100k   Role Location: Cambridge, UK (Hybrid)   The company: This is an exciting opportunity to join a fast-growing, venture-backed technology company at the forefront of applied AI for enterprise. Recognised by leading industry publications and experiencing rapid global growth, the company is transforming how complex professional workflows are delivered at scale.   Role and Responsibilities: We are seeking a skilled and forward-thinking engineer to join an Infrastructure team in a DevOps / Platform Engineering role. The ideal candidate will have a strong background in building cloud-native infrastructure with a focus on automation, scalability, and security, alongside deep experience with Infrastructure-as-Code (IaC). You will play a key role in designing and evolving a modern AWS-based platform, improving deployment patterns, automating environment provisioning, and ensuring systems are reliable, repeatable, and resilient. Design, build, and maintain scalable cloud infrastructure using AWS services such as EC2, EKS, RDS/Aurora, ElastiCache, OpenSearch, and CloudFront Drive the development and adoption of Kubernetes (EKS) for managing both production and internal workloads Architect and implement Infrastructure-as-Code (IaC) pipelines, integrating tools such as Terraform into CI/CD workflows for provisioning, validation, and testing Implement and improve zero-downtime deployment strategies (e.g. blue/green, rolling, canary), including automated rollback and recovery Continuously enhance platform resilience by removing single points of failure and improving autoscaling and high availability Collaborate with SRE, Security, and Engineering teams to strengthen observability, monitoring, and alerting using tools like Prometheus, Grafana, and CloudWatch Partner with Security to embed best practices across IAM, secrets management, web application firewalls, and posture management Optimise infrastructure performance and cloud spend through automation and cost visibility tooling Participate in on-call rotations, incident reviews, and ongoing reliability improvements   Job Requirements: Proven experience designing, automating, and maintaining AWS infrastructure (e.g. EKS, RDS, EC2, CloudFront, VPC, IAM, Security Hub) Hands-on experience building IaC pipelines using Terraform, integrated with CI/CD tools (e.g. GitHub Actions, GitLab CI, Jenkins, or AWS CodePipeline) Strong knowledge of Kubernetes operations on AWS, including scaling, deployment automation, and monitoring Solid foundation in Linux systems administration, networking, and cloud security principles Experience with observability tooling (e.g. Prometheus, Grafana, Loki) and structured alerting practices Experience managing databases, including migrations, high availability setups, backups, and disaster recovery strategies Strong scripting and automation skills (e.g. Terraform, Python, Bash) Excellent communication and collaboration skills, with a focus on improving engineering efficiency through automation and standardisation   Interview process: 1st stage interview, 2nd stage technical, 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: $70 per hour Role Location: United States The Company: A mission-driven healthcare technology organization focused on improving health equity for underserved populations across the United States. Through a scalable patient engagement and interoperability platform, the organization partners with healthcare providers to increase access to care, improve clinical outcomes, and address social drivers of health. The engineering team operates in a fully distributed environment and is scaling its integration capabilities to connect with leading EHR systems and healthcare data platforms. The team values secure, reliable, and maintainable engineering practices, with a strong emphasis on interoperability standards and cross-functional collaboration. You’ll join a collaborative, high-performing engineering team that works closely with Product, Customer Success, and external healthcare partners to deliver meaningful technical solutions that directly impact patient outcomes. Role & Responsibilities: We’re seeking an experienced Senior Software Engineer with strong backend development experience to design, build, and scale reliable messaging and integration systems that power communication workflows across healthcare platforms. The ideal candidate has deep experience building backend services, APIs, and distributed systems, and brings a strong sense of technical ownership, system reliability, and continuous improvement. Experience working with healthcare integrations, messaging infrastructure, and data-driven decision making is highly valued. You will collaborate closely with engineering, product, customer success, and data teams to deliver scalable messaging workflows that improve patient engagement and operational outcomes. Key Responsibilities: Design, build, and maintain scalable backend services using Ruby on Rails, JavaScript, and relational databases, supporting high-volume messaging workflows, APIs, and system integrations. Develop and optimize messaging pipelines that support SMS, voice, and automated communication workflows, ensuring reliable delivery, consent management, scheduling, and orchestration of communications. Build and maintain secure API-to-API integrations that connect messaging platforms with external systems and services, ensuring reliable data exchange and workflow automation. Collaborate with engineering teams to design and evolve scalable messaging infrastructure, contributing to architectural decisions related to delivery optimization, system performance, and event-driven communication workflows. Leverage advanced SQL and analytical thinking to investigate system behavior, troubleshoot production issues, analyze delivery performance, and inform technical decisions with data. Partner closely with Product, Customer Success, Data, and Engineering teams to gather requirements, contribute to technical documentation, clarify workflows, and design messaging features that support business and user needs. Provide technical mentorship through code reviews, design discussions, and collaborative development, helping guide engineering best practices and supporting the growth of other engineers on the team. Write and maintain automated tests alongside production code, ensuring backend services are secure, reliable, and production-ready. Create clear technical documentation and internal enablement resources that help teams monitor, troubleshoot, and support messaging systems in production. Participate in on-call rotations and incident response, supporting messaging infrastructure to maintain high availability and performance. Actively contribute to engineering culture through technical reviews, retrospectives, architecture discussions, and technical debt management, helping evolve platform capabilities as the system scales. Core Requirements Minimum 5 years of hands-on software engineering experience, with strong proficiency in Ruby on Rails and JavaScript Minimum 5 years of experience building and scaling backend systems, APIs, and services Strong understanding of software development lifecycle, design patterns, object-oriented programming, and engineering best practices Advanced SQL proficiency with the ability to analyze large datasets to troubleshoot issues and inform technical decisions Experience designing and supporting high-throughput backend systems and distributed architectures Experience working in environments where automated testing is a core development practice Demonstrated ability to independently own complex features end-to-end, from technical design through production support Strong collaboration skills across technical and non-technical stakeholders Excellent written and verbal communication skills in a fully remote environment Growth-oriented mindset with strong attention to system reliability, scalability, and engineering quality Preferred Experience Experience working with messaging and communication platforms (e.g., SMS, voice, or messaging APIs) Experience designing event-driven systems, message queues, or high-throughput delivery pipelines Experience with Ruby on Rails, JavaScript (React), PostgreSQL, and cloud platforms Experience working with healthcare technology platforms or healthcare data integrations Experience contributing to API design improvements, messaging delivery optimization, or automated testing strategies Familiarity with messaging compliance requirements such as TCPA, consent management workflows, opt-out handling, or A2P messaging frameworks 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 Role: Database Platform Engineer (Devops/Sre) Location: Lisbon, Portugal Contract: Permanent   About the role   My client are looking for someone to take ownership of our database platforms across a modern, cloud based environment. This role sits at the intersection of engineering, platform and security, with a strong focus on performance, reliability and scalability.   You’ll be working closely with application and platform teams to ensure our data layer is robust, efficient and built to scale. This is a hands on position for someone who enjoys solving complex performance challenges and building well engineered, reliable systems.   What you’ll be doing   Own the performance and stability of database platforms across production environments Drive improvements in query performance, indexing strategies and overall database efficiency Work with engineering teams on schema design and data modelling aligned to real workloads Design and maintain highly available systems, including replication, failover and backup strategies Define and test disaster recovery processes to ensure resilience and recovery objectives are met Establish and track SLIs and SLOs for database performance, availability and reliability Build out monitoring, alerting and observability for database health and performance Contribute to incident response and lead root cause analysis when issues arise Apply security best practices across database environments, including access control and encryption Automate database provisioning and operations using Infrastructure as Code and CI/CD pipelines Standardise configurations and practices to ensure consistency across environments   What they’re looking for   Strong hands-on experience with SQL and/or NoSQL databases in production environments Solid understanding of performance tuning, query optimisation, indexing and data modelling Experience defining and working with SLIs/SLOs for reliability and performance Experience working with cloud-based database services Good knowledge of high availability, replication and disaster recovery approaches Experience with monitoring, alerting and operational metrics for data platforms Comfortable working with Infrastructure as Code (Terraform or similar) and CI/CD pipelines Familiarity with security controls such as IAM, encryption and secrets management Strong Linux fundamentals and scripting experience Ability to troubleshoot complex issues and work effectively under pressure

Senior Data Engineer (Scala / Spark) – AWS Migration | Start ASAP   Signify Technology is partnering with a client on a large-scale GCP ? AWS data migration We’re looking for a Senior Data Engineer to help deliver the final phase of a business-critical data platform.   Location: Fully Remote (EU timezones) US East Coast team – some overlap required Contract:- Until the end of 2026 (likely extension) Rate: $500–$550 per day   Interview Process -2 stages (fast turnaround)   What You’ll Do Deliver the final 30% of a complex data migration (GCP ? AWS) Work with and adapt an existing Scala-based Spark codebase Translate pipelines for AWS compatibility and performance Support Airflow (Python) orchestration Ensure robust testing, validation, and monitoring across pipelines   Tech Stack Scala, Apache Spark, Python (Airflow), SQL, GCP, AWS (Kubernetes), Hive   What We’re Looking For Strong Scala + Spark experience Proven experience with data pipeline migrations (GCP/AWS) Solid understanding of testing, validation, and data quality Comfortable working with high-impact, business-critical datasets   if you are interested in this role, please apply or drop me a message at jay.flaherty@signify-tech.com

Job Title: Head of Security  Location: Portugal  My client are  looking for a senior security engineering leader to shape and scale our security engineering capabilities in a complex, cloud-first environment. This role combines leadership, architecture, and hands on engineering. You will lead a small but high-impact team while remaining close to technical decision-making, helping to design and implement secure, scalable systems. You will work closely with engineering, infrastructure, and product teams to embed security into development and operational processes, ensuring security supports innovation rather than slows it down. What you’ll be doing Leadership & team development Lead, mentor and grow a team of security engineers across multiple domains Set priorities and drive delivery against a defined security engineering roadmap Promote a culture of ownership, pragmatism, and continuous improvement Partner with senior stakeholders to align security initiatives with business risk Security architecture & engineering Own and evolve the organisation’s security architecture and core tooling Design secure, scalable solutions across cloud-native and hybrid environments Evaluate and rationalise security technologies, ensuring effectiveness and simplicity Contribute directly to technical problem-solving and key design decisions Cloud & infrastructure security Define and enforce security standards across cloud platforms and infrastructure Support secure design of containerised and distributed systems Ensure strong access control models and adoption of zero trust principles Guide engineering teams on secure infrastructure patterns DevSecOps & application security Embed security controls into CI/CD pipelines and development workflows Support secure coding practices, threat modelling and design reviews Work closely with engineering teams to drive “shift-left” security Help teams balance delivery speed with security requirements Detection, response & automation Improve detection capabilities through better logging, monitoring and engineering Drive automation across security operations to improve efficiency and response Use scripting and engineering approaches to integrate and scale security tooling Define meaningful KPIs and metrics to track effectiveness Requriements 10+ years’ experience in security engineering or broader information security roles Experience leading and developing technical security teams Strong hands-on background in cloud security (AWS, Azure or GCP) Solid understanding of identity and access management concepts and controls Experience with detection, monitoring, or security operations tooling Knowledge of modern infrastructure (containers, cloud-native environments) Experience working closely with engineering and DevOps teams Ability to design and implement scalable security solutions Key skills & attributes Comfortable operating both strategically and hands-on Strong problem-solving mindset with attention to detail Able to influence technical and non-technical stakeholders Practical approach to security, balancing risk and business needs Experience working in regulated or complex environments is a plus Strong communication skills in English  

Position: AI Engineer Location: New York (Can be remote from USA, must be willing to travel quarterly) Contract: FTE, Perm Signify have partnered with a client looking for an AI Engineer who enjoys being both hands-on in the code and out in the community. This is a role for someone who doesn’t just build things but can explain them, demo them, and inspire others to build too. You’ll spend your time creating real-world examples, demos, and technical content that make complex AI workflows feel simple. Alongside that, you’ll represent the team externally whether that’s at meetups, conferences, or online—helping developers understand what’s possible. This role sits at the intersection of engineering, storytelling, and community. You’ll also play a key role in feeding insights from developers back into the product, helping shape what gets built next. What you’ll be doing Build and showcase practical AI applications using modern models, tools, and frameworks Create high-quality technical content  that developers actually want to use Develop sample projects, starter templates, and reference implementations Engage directly with developers through events, workshops, and online communities Represent the team at conferences and meetups, delivering clear and engaging demos Collaborate with product and engineering teams to improve the developer experience Gather feedback from users and translate it into actionable product insights Stay up to date with the latest trends in AI, LLMs, and developer tooling Requirements  3+ years of experience as a Software Engineer or AI/ML Engineer Strong hands-on coding ability, with experience building and shipping projects Experience working with AI tools, LLMs, or agent-based systems Proficiency in Python and/or TypeScript Active GitHub presence or portfolio of technical projects Ability to explain complex technical concepts in a clear, engaging way Experience creating technical content (blogs, demos, videos, or tutorials) Confidence presenting to technical audiences (meetups, talks, workshops, etc.) Interest in engaging with developer communities (online or in-person) Degree in Computer Science or equivalent practical experience

Position: Senior DevSecOps Engineer Location: Portugal (Must be based in Portugal) Contract: Permanent About the Role My client are hiring for a Senior DevSecOps Engineer to help build and operate a secure, scalable, and high performing cloud environment that supports both engineering teams and business critical systems. This role sits at the intersection of infrastructure, security, and developer experience, with a strong emphasis on automation and reliability. You’ll collaborate closely with software engineers, security specialists, and operations teams to design modern platform solutions that enable fast delivery while maintaining strong governance and resilience. This is a hands-on position where you’ll influence architecture, improve tooling, and help shape best practices across the organisation. What You’ll Do Design, build, and operate cloud-native infrastructure with a focus on scalability, reliability, and security Partner with security teams to embed security controls into infrastructure, pipelines, and development workflows Drive adoption of DevSecOps practices, including early stage security integration in the software lifecycle Develop internal tools and automation to enhance developer productivity across Linux and macOS environments Build and maintain CI/CD pipelines to support efficient and secure software delivery Manage and optimise containerised environments using Kubernetes and related technologies Improve system observability, performance, and incident response capabilities Implement infrastructure as code and automated provisioning processes Troubleshoot complex system issues across distributed environments Contribute to architectural decisions and continuously improve platform standards Requirements Extensive experience in DevOps, SRE, or Platform Engineering roles Strong hands on experience with cloud platforms, preference would be AWS Proven experience designing and maintaining CI/CD pipelines Solid understanding of cloud security principles and practical implementation in production environments Experience with tools such as SAST, DAST, and dependency scanning into pipelines Hands-on experience with Docker or Kubernetes in production Strong Linux system knowledge, including scripting and system level troubleshooting Experience with infrastructure as code tools such as Terraform or CloudFormation Familiarity with distributed systems and microservices architectures Experience working with databases such as PostgreSQL, MongoDB, or DynamoDB Ability to write clean, maintainable code in languages such as Python or Java Good communication skills and ability to collaborate across teams