Senior Data Scientist - MTS (m/f/d)

Unstoppable starts with people.
The future of payments is being built today, and at
Paymentology
, we are looking for people who want to help shape it. We power card issuing for leading banks, fintechs and digital brands across the globe, and as we continue to grow, we are looking for curious, ambitious people who thrive on solving complex challenges, embrace innovation and want to make a tangible impact at global scale.

Our Engineering culture values
autonomy, excellence, ownership, and curiosity
. We encourage engineers to lead solutions end-to-end, mentor others, and continuously improve how we build and operate software. If you’re excited by solving complex global payments challenges and enjoy working with smart, kind, mission-driven people — this is the place for you.

What you get to do:
We’re looking for a
Senior Software Engineer
to design, build, and scale Java backend services that power our global payments infrastructure. You’ll lead end-to-end delivery, contribute to technical strategy, and help raise the engineering bar across the organisation.

• Lead the design and development of backend services, distributed systems, and APIs.
• Own features end-to-end (architecture, coding, testing, observability, and deployment).
• Write clean, maintainable, well-tested code, following engineering best practices and test-driven development.
• Break down complex technical work into manageable chunks
• Work in a collaborative, cross functional, agile team environment
• Mentor associate and mid-level engineers, fostering a culture of technical excellence
• Identify, document, and deliver technical improvements (performance, reliability, scalability).
• Participate in incident response and support rotations
• This role includes participation in an on-call rotation, with on-call duties scheduled for one week out of every five weeks.

Requirements:
Experience:

• Significant commercial experience with modern Java 15 (We’re currently moving to 21. As a guide, multiple projects with 5+ years of experience. Proven experience designing, building and maintaining distributed systems and microservices)
• Deep understanding of Object-Orientated programming
• Familiarity with event-driven architectures or Domain Driven Design.
• Strong system design experience, including designing scalable, resilient, and high-performance distributed applications, with the ability to make architectural decisions and evaluate technical trade-offs.
• Love to work using TDD
• Strong grasp of relational databases (PostgreSQL, MySQL) and data modeling.
• Solid understanding of cloud infrastructure (AWS preferred), containerisation, CI/CD, and Infrastructure-as-Code.
• Experience in fintech, payments, or other high-throughput/regulated domains.
• Most importantly, a desire to learn, grow and collaborate with an amazing team

What you can look forward to:

• 100% remote, globally distributed team
• We value engineers that closely understand our customers and business
• High-impact role supporting real-time global payments
• Growth path toward Senior Engineer 2, Staff Engineer, or Engineering Manager
• A diverse, mission-driven engineering culture

At
Paymentology
, we believe that making a difference starts with the people behind the work. You will be part of a diverse, global team of Paymentologists who are united by a shared mission to advance the world through payments.

This is an opportunity to contribute to meaningful work, collaborate across markets and functions, and help shape the future of a business with global reach and real impact.

We are an equal opportunity employer committed to fostering a diverse and inclusive workplace where everyone can thrive. We welcome applications from people of all backgrounds and do not discriminate on any unlawful ground, including race, colour, ethnicity, sex, gender, pregnancy, marital status, family responsibility, age, disability, sexual orientation, religion, belief, language or HIV status.

Paymentology will never request any form of payment from applicants at any stage of our recruitment process, including for applications, interviews, training or job placements. If anyone asks you for money while claiming to act on behalf of Paymentology, please treat this as fraudulent and do not make any payment. All legitimate Paymentology vacancies are advertised via our official careers page , and our recruitment emails are sent only from official Paymentology domains.

At Better we are building software solutions that help medical teams improve patient care. Our advanced open-data medical platform and healthcare applications already support over 30 million patients’ electronic health records worldwide, making data quality our number one priority.

This is where
you
come in, as our new Technical lead. The Technical lead role is a senior hands-on technical role responsible for leading the technical delivery of Better Platform implementations across multiple customer programmes. The role sits within the Professional Services delivery team and combines deep platform expertise with team leadership: guiding engineers, architects, and integration specialists while remaining actively involved in technical decision-making, solution design, and customer-facing delivery. The Technical lead role is the primary technical authority for assigned programmes and acts as the escalation point for complex technical issues across the team.

Skills and expertise you need to excel in this position:

• Proven experience leading and mentoring technical team members, including engineers, integration architects, and technical analysts, in a delivery context.
• Experience with XML, SQL/database technologies, ETL tooling, and API-based system integrations, including third-party vendor interfaces.
• Ability to read, produce, and review technical solution design documents, integration specifications, data mapping artefacts, and architecture documentation.
• Confident engaging with customers at a senior technical level: leading workshops, presenting solution designs, and following up on agreed actions.
• Strong working knowledge of interoperability standards: openEHR (Reference Model, AQL, templates), HL7 FHIR (R4, profiling, API patterns), and IHE adapter patterns.
• Deep, hands-on knowledge of the Better Platform backend, including the CDR, ODR, openEHR storage layer, FHIR APIs, ETL pipelines, API connectors, IHE adapters, and XML document structure interfaces.

How will you drive success in this role through your daily actions?

• Technical leadership:
  Act as the primary technical authority across assigned programmes, owning decisions on implementation, configuration, and integration, and serving as the escalation point for complex platform issues (coordinating with Better HQ engineering as needed).
• Team leadership:
  Lead, mentor, and develop engineers, integration specialists, and technical analysts through reviews, structured guidance, and performance feedback; support capacity planning and scope future technical roles with the Director of Professional Services.
• Delivery management:
  Manage the technical workstream across multiple concurrent programmes, ensuring integration milestones, configuration deliverables, and quality gates are met, and owning the technical quality of all outputs (designs, specifications, configurations, test evidence).
• Platform & documentation standards:
  Drive best practices for configuration management, environment promotion (dev/test/prod), and technical documentation, maintaining change management discipline and flagging risks promptly to the project manager and Director of Professional Services.
• Solution design:
  Lead technical design of new integrations, configurations, and platform extensions, producing clear architecture and specification documentation for internal and customer review.
• Customer engagement:
  Lead customer-facing workshops, architecture reviews, and integration sessions, presenting complex concepts clearly to varied audiences whilst building trusted, long-term technical relationships as the recognised authority for assigned programmes.
• Pre-sales & commercial support:
  Support pre-sales with feasibility assessments, effort estimates, and tender content, whilst staying current on Better Platform developments and open standards (openEHR, FHIR, IHE) to bring relevant insights back to the team and customers.

What will you receive as a valued member of the Better team?

• Full-time employment and other financial benefits:
  Enjoy a stable position with a range of comprehensive benefits tailored to enhance your work experience.
• Personal and professional growth:
  We go beyond buzzwords. From internal and external trainings to mentoring, coaching, and access to our internal training platform, you’ll have the tools and support to shape your path.
• A real focus on wellbeing:
  Our wellbeing policy is more than just words. It includes access to resources designed to help you stay balanced, focused, and healthy, inside and outside of work.
• Flexibility and trust:
  Enjoy the autonomy to manage your own schedule with flexible hours and a hybrid work model that adapts to your lifestyle.
• A culture of learning and openness:
  Work in a flat, collaborative environment where curiosity, critical thinking, and knowledge sharing are part of the daily rhythm, not just encouraged but expected.
• Meaningful impact:
  Be part of a mission-driven company transforming healthcare for over 30 million patients worldwide. What you do here matters.
• A great space to do your best work:
  Work from our bright and thoughtfully designed office in the heart of Ljubljana, where you’ll have your own desk and a vibrant community of colleagues.

Sounds good?

Send us your CV, and we will get back to you as soon as possible.

About Teads
Teads is a leading omnichannel advertising platform focused on driving outcomes for brand and performance advertisers across screens. With a focus on meaningful business outcomes for branding and performance objectives, Teads drives value by leveraging predictive AI technology to connect quality media, beautiful brand creative, and context-driven addressability and measurement. Teads is directly partnered with more than 10,000 publishers and 20,000 advertisers globally. The company is headquartered in New York, New York with a global team of around 1,700 people in 30+ countries.

For more information, visit www.teads.com.

About The Team
This role sits within the Supply Technical Solutions team in Ljubljana, reporting directly to the Supply Technical Solutions Team Lead. Following our recent merger and scaling phase, this team is responsible for driving our omnichannel outcomes across the open internet. You will collaborate daily with global operations and business teams to architect and maintain the technical foundations of our programmatic and traditional supply, solving complex market challenges at real scale.

About The Role
Core Mission:
Act as the technical execution anchor to deliver seamless programmatic and traditional supply integrations. Success in this role means providing high-ownership technical troubleshooting and deep analytical insights that directly optimize our supply ecosystem and elevate the customer experience.

What You’ll Bring
Strategy & Innovation:

• Architect technical best practices to ensure successful implementation of programmatic and traditional supply across the platform.
• Drive real insights through deep analysis using multiple internal and external tools to optimize supply activity.

Execution & Flawless Delivery

• Scale the resolution of case tickets from the Supply Solutions queue, diligently troubleshooting product issues before escalation.
• Scale technical assistance to Account Managers and clients to facilitate a flawless troubleshooting process.

Stakeholder Management & Collaboration

• Cultivate advisory relationships with internal and external stakeholders to provide quality technical solutions and support.

Must-Haves

• Technical background: Proven track record in businesses operating successful tech products.
• Web technologies knowledge: Proficiency in HTML, CSS, and JavaScript.
• Integrations knowledge: Experience with RestAPI, HTTP, JSON, OpenRTB protocols, and PostMan.
• Analytical & Communication: Proficiency in SQL and fluent English with the ability to drive problems to resolution.

Nice-to-Haves

• Bachelor’s degree in engineering or a similar discipline.
• Experience with MySQL, BQ, Redash, and turning data into business suggestions.
• Familiarity with Python scripting, APIs, and automation tools like n8n.
• Understanding of system monitoring (Grafana) and production troubleshooting.
• Ability to utilize AI agents for process optimization and automation.

What We Offer

• Hybrid working model and parking reimbursement
• Pet friendly office with a fully stocked kitchen
• Twice-weekly gourmet lunches cooked by a renowned chef

What are our recruitment process steps?

• Introduction call with our recruitment team
• Zoom session with the Supply Technical Solutions Team Lead
• Home assignment
• On-site tour around the company, meet the team and present your assignment
• Final interview

Please submit your CV in English.

Life at Teads
At Teads, we don’t just offer new roles - we blend creativity, technology, and data to shape the future of media. You’ll work with smart humans, meaningful brands, and cool tools, all while helping redefine how advertising works in a world that demands more transparency, better insights, and smarter strategies.

Role
As a Teadster, you’ll play a critical role in shaping our future success in the region. Here’s why Teads stands out:

• We've merged two open internet category leaders—Outbrain and Teads—to create the ‘new’ Teads, a unified omnichannel platform that drives results from branding to performance across all screens, including CTV, mobile, and web.
• As part of our team, you’ll thrive in a collaborative and forward-thinking environment that fosters innovation, creative problem-solving, and continuous learning.
• Teads is committed to your success, offering the support, tools, and development opportunities you need to excel in your role.

Our company culture is welcoming, dynamic, diverse, global, and built on top performance.

Teads is an equal employment opportunity employer and committed to diversity and inclusion at all stages of recruitment and employment.

Our team is made up of individuals who are approachable, resourceful, passionate, and proactive. We foster a sense of belonging through our Employee Resource Groups – employee-led groups in which we debate topics and drive change: environmental, women empowerment, charitable initiatives to diversity, equity, and inclusion, you’ll be able to share your passions with likeminded people.

• Provectus is an AWS Premier Partner and an Anthropic Strategic Partner, working at the frontier of applied AI. We help enterprises turn Claude, agentic systems, and their own data into measurable business outcomes — through bespoke applications, managed services, and advisory engagements. With offices in North America, LATAM, and EMEA, we partner with clients worldwide.
• Our work centers on two verticals — Financial Services & Insurance and Healthcare & Life Sciences — where we deploy five pre-built AI Blueprints: Submission Flow, Portfolio Lens, Asset Flow, Revenue Flow, and Evidence Lens. Each Blueprint rebuilds a critical business process front to back, shipped from working code and tuned to a client's specific book, regulators, and operating posture.
• Our team holds 100+ AWS certifications, is Claude Code certified, and co-delivers Anthropic's Agentic SDLC program, Cowork Activation, and AI Blueprint engagements.
• Where this role sits

You will work in a small, senior pod alongside an FDX; our delivery arc is Sprint → Enable → Realize:

• Forward Deployed Executive (FDX) owns the commercial relationship and the business outcome. Works alongside the client's leadership or C-suite level to move the client's KPIs — revenue growth, cost reduction, risk reduction
• Forward Deployed Engineer (FDE) embeds with a client to change how that client operates. You own the method; nobody hands you a ticket. You map the client workflow as it actually happens, identify the business problem underneath it, build a working AI solution, present to the client in the language of outcomes, and transfer it. Provectus maintains industry Blueprints — working systems that have already shipped for a client in the same industry — so you begin from running code and tuning it to this client's specific book, regulators, and operating posture. You will be measured on whether the Business Unit's number moved, not on hours or scope delivered.

What You’ll Do:
Take the seat

• Sit with the client and the Forward Deployed Executive at the start of an engagement. Learn the function from inside, not from a requirements doc, and redesign the function from first principles.
• Reach working fluency in a new domain — insurance underwriting, healthcare revenue cycle, asset flow.

Build

• Design and ship production GenAI systems into the customer’s environment (cloud-native data, LLM-based, and agentic AI solutions). Implement and optimize RAG systems for production use cases
• Build the evaluation harness before you build the feature. Define what working means, instrument it, and let the evals drive the design.
• Write production code across the stack — AI, backend services, data pipelines. We choose tools to fit the customer.
• Take systems to production on AWS (GCP or Azure where the customer requires it): containerised, CI/CD, automated testing, monitoring, and maintainable after we leave. Hand the system over to the client.
• Start from the blueprint, and feed the blueprint. What you learn in the field becomes the baseline the next engagement starts from.
• Lead architecture reviews, produce technical design documents, and contribute to standards. Mentor engineers and share knowledge across the team.

Own the outcome.

• Work in a pair with a FDX who carries the Business Unit’s KPIs. Your work is measured against the same number.
• Own the technical direction of technical proposals and scoping. Drive adoption. Change management is part of the engineering job here.
• Be credible with the customer’s engineers and their executives.
• Shape what we commit to before we commit to it.

What You’ll Bring:
Mindset

• Proactive and self-directed; identify problems before they're handed to you
• Comfort with ambiguity and ownership. Engagements start underspecified by design. Closing that gap is the job
• B2+ English, comfortable collaborating across distributed, multicultural teams

Client Engagement

• You are willing to spend time understanding and doing someone else’s job on the client's side before you write a line of code
• Credible with senior stakeholders — you can hold a redesign conversation with a BU head and a scoping conversation with a CTO, presenting outcomes to them
• You can produce a scoped, phased delivery plan with clear deliverables, dependencies, and risks — and estimate what it will cost to build and to run

Technical depth

• 7+ years building and running production systems.
• Solid AI/ML foundations. You understand what the models do well enough to reason about failure modes
• Designed and shipped to production LLM applications and agentic workflows — not demos, not POCs, not notebooks
• Agentic orchestration: multi-step workflows, graph-based orchestration, tool use, state management, and recovery from partial failure
• Experience with LLM APIs (Anthropic, AWS Bedrock, or OpenAI) and agent frameworks.
• Experience building and optimizing RAG systems in production
• Strong engineering fundamentals — dropped into an unfamiliar codebase or language, you’re productive. Python and/or TypeScript proficiency; depth matters more than stack.
• Experience in making and defending architectural trade-off decisions
• Hands-on AWS production depth: Bedrock, Bedrock AgentCore, Lambda, ECS, S3, SQS, ECR, or similar. GCP or Azure is a plus
• Cloud-native delivery: containers, ECS or Kubernetes, IaC, and CI/CD applied to AI pipelines
• You evaluate. You have built or owned an eval suite for a non-deterministic system, and you can explain what you measured, how you produced ground truth, and what gated a release
• Model and agent monitoring, drift detection
• Cost and latency discipline: model tiering, caching, and the ability to say what a workload costs to run before it runs
• Hands-on production experience with the Claude ecosystem — Claude Code, CLAUDE.md, hooks, skills files. Spec-driven development — writing the intent, constraints, and acceptance criteria before you let an agent build — is a strong plus
• MCP: you can say why an agent would prefer it to a REST integration. Having authored a server is a plus

Nice to have:

• Prior experience as a founder, CTO, or engineering leader who has chosen to return to individual contribution
• Experience in one of the industries: financial services, insurance, healthcare
• Consulting, professional services, or other embedded customer-facing delivery
• A2A: you can explain agent-to-agent interoperability
• AWS and Claude Code Certifications
• CI/CD pipeline experience (GitHub Actions, GitLab CI)
• Experience in an additional language (Go, TypeScript, or Rust)
• Experience with Apache Spark, Apache Airflow, Kafkа

What We Offer:

• The chance to shape how leading enterprises across LATAM, Europe, and North America adopt AI, from strategy through first deployment
• A forward-deployed model working in small, senior teams alongside Principal Architects and Forward Deployed Engineers
• A growing AI delivery practice where you help build the tooling and frameworks, not just use them
• Remote-friendly culture
• Internal training programs with full support for Claude, AWS, and other professional certifications, conference attendance
• Career growth; we actively develop our engineers
• Access to the latest AI tools and premium subscriptions
• Long-term B2B collaboration
• Private medical insurance or a budget for your medical needs
• Paid sick leave, vacation, and public holidays
• Equipment and all the tech you need for comfortable, productive work

How we hire:

• Intro conversation. The role, your background and aspirations, tech questions.
• Technical interview with live engineering sessions. Real problems, your own editor, you may use an LLM assistant
• HR Interview. Soft skills and expectations
• HM interview. Tech questions; a live engineering session is also possible

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.