Zaposlitev "backend developer"

At Celtra, we are leading a creative revolution. In a world where digital content consumption is skyrocketing and audience expectations evolve daily, traditional production models can no longer keep up - and that's where we come in. Our creative solutions help media owners and operators monetize inventory more effectively, bridge the creative supply gap for brands and agencies, and deliver faster, smarter, and more personalized experiences. We're not just keeping up with industry shifts - we are setting the pace. Now, we are looking for a Software Developer Intern who will have an opportunity to work on our products, used by top companies and thousands of people on a daily basis. You will be joining one of our cross-functional teams and, with the support of our mentors, you will get your hands dirty by working on some interesting projects. 1. What tools do we use? On the backend, you can find Scala, NodeJS, PHP, MySQL, Spark, Snowflake, and also MongoDB, Kinesis. On the frontend, we use Vue.js, Typescript and Vanilla JS when needed. Everything runs on the AWS cloud, and the ECS cluster orchestrates it. We also love CI/CD, IaC and do daily deployments to ensure your contributions see the light of day as soon as the QA team is happy. We also actively embrace AI-assisted development with Cursor to boost productivity, iterate on PoCs and explore new ways of building software. 2. Your responsibilities: - Developing frontend and backend of our products that are used by top companies and thousands of people on a daily basis. - On the frontend you will be implementing rich experiences in our apps, participating in revamping the client-side architecture and general redesign of the product frontend. - On the backend you will mainly work on our APIs (REST, web sockets) and family of background jobs. - Making sure we maintain a high level of quality by writing automated tests. 1. Qualifications - Understanding of RESTful API architecture. - Knowledge of HTML5 and CSS. - Knowledge of JavaScript. - Knowledge of at least 1 backend programming language (Python, PHP, Ruby, Java, Go, Scala, etc.). - Good verbal and written English communication skills. - Willingness to constantly learn and improve. - Team player. - Active student status in Slovenia. 2. What brings extra points? - Knowledge of Vue.js. - Knowledge of global state management concepts. 1. Why Celtra? - Impact: Create high-quality digital work for leading global brands across a wide range of campaigns and formats. - Culture: We are inventive, collaborative, and proudly a little bit quirky - because doing great work should also be fun. - Flexibility: Hybrid with strong hubs in Ljubljana, London and New York, and team get-togethers that keep us connected. - Growth: You will learn from experienced team members and grow into bigger roles as you go. 2. What do we offer? - A buddy and a mentor that will help you grow professionally, plus a well structured onboarding / professional development plan. - Flexible working hours and hybrid work based on a fixed number of in-office days. - Top-notch working equipment. - Regular team & company events. - Free breakfasts & beverages available in the office. Apply here: https://celtra.com/careers/openings/#op-421095-software-developer-intern-

Objavljeno pred: 1 mesec

We're building something that doesn't exist yet: an AI immune system for humans. The Umanitek Guardian Agent protects people from deepfakes and digital impersonation by combining intelligence with systems built for verification and scale. If you're excited by the idea of building reliable platforms and backend systems for agents that reason, not just predict, you'll feel right at home. As a Platform Engineer, you'll build and operate the platform powering the Guardian Agent ecosystem. You'll work across backend engineering and infrastructure, building production-ready services while ensuring they can be deployed, monitored, and scaled reliably. Your primary focus will be developing backend services, REST APIs, MCP tooling, and agent runtimes using Node.js and TypeScript. You'll also own key parts of the platform layer: CI/CD pipelines, cloud environments, deployments, observability, and infrastructure automation. This is a hands-on role where ownership and systems thinking matter. You'll help ensure Guardian services are secure, scalable, observable, and easy for the team to evolve. Responsibilities -Build and maintain backend services, REST APIs, MCP servers, and agent tooling using Node.js and TypeScript -Design and operate cloud infrastructure on AWS -Own CI/CD pipelines, deployments, release workflows, and production environments -Build and maintain containerized services using Docker and infrastructure automation tools -Ensure reliability through monitoring, logging, alerting, performance optimization, and security best practices -Troubleshoot production issues across application and infrastructure layers -Collaborate on architecture decisions around AI agents, decentralized systems, and scalable production infrastructure Technical Experience -4+ years of experience in Backend Engineering, Platform Engineering, DevOps, or Infrastructure Engineering -Strong Nest.js, TypeScript and Node.js experience building production backend services -Experience with REST APIs, Express, Nest.js, and microservice architectures -Experience deploying and operating production systems in cloud environments (AWS, DigitalOcean, or GCP) -Strong experience with Docker, CI/CD pipelines, and infrastructure automation concepts -Experience with monitoring, logging, and production troubleshooting -Solid understanding of databases, networking, Linux systems, and security fundamentals Nice to Have -Familiarity with Turborepo and monorepo workflows -Experience with MCP tooling, AI/LLM applications, or agent-based systems -Experience with Docker or advanced container orchestration -Experience with Terraform or infrastructure-as-code workflows -Experience with distributed systems, event-driven architectures, or background workers -Familiarity with decentralized systems or knowledge graph technologies Why Umanitek We're early, lean, and ambitious. You'll work directly with founders and researchers behind OriginTrail and Umanitek, helping build the foundation of AI safety infrastructure used by public institutions, enterprises, and individuals. If that sounds like your kind of hard — come build with us. We offer a market-aligned salary, participation in the employee stock option pool, and clear opportunities to grow into senior and leadership roles as the company scales. Final employer: Umanitek ag Approximate salary: 4000-6000EUR Apply: If interested, please send your CV to [email protected] or apply via our website.

Te navdušuje, kako veliki jezikovni modeli spreminjajo delo z dokumenti in drugimi vsebinami? Pridruži se našemu hitro rastočemu kompetenčnemu centru za umetno inteligenco, kjer gradimo pametne asistente in rešitve RAG, ki jih vsak dan uporabljajo banke, zavarovalnice, javna uprava in energetska podjetja. Pri nas ne boš le preizkušal modelov. Izbiral, prilagajal in postavljal boš konkretne AI-rešitve, ki morajo delovati zanesljivo, varno in skladno s strogimi pravili reguliranih panog. Iščemo radovednega inženirja s praktičnimi izkušnjami z GenAI in profesionalnim razvojem programske opreme, ki rad prevzame pobudo in bo s svojimi idejami soustvarjal prihodnost naših produktov. Izkušnje z generativno umetno inteligenco (GenAI) in velikimi jezikovnimi modeli (LLM) ter praktične izkušnje z razvojem in integracijo aplikacij in storitev, ki temeljijo na LLM Praktične izkušnje z RAG Znanje programskega jezika C# in. NET je prednost Ocenjevanje in konfiguriranje modelov umetne inteligence glede na projektne in poslovne zahteve Izkušnje z razvojem programske opreme so prednost Dobro razumevanje in uporaba dobrih praks programskega inženirstva Praktične izkušnje z razvojem AI-asistentov in klepetalnih robotov, zlasti aplikacij, ki znajo podajati odgovore glede na kontekst Izkušnje z rešitvami umetne inteligence in generativne umetne inteligence, nameščenimi v kontejnerskih okoljih, kot sta Docker in Kubernetes so prednost Predznanje ali močno zanimanje za podatkovno znanost, strojno učenje, globoko učenje ali obdelavo naravnega jezika (NLP) so prednost Praktične izkušnje z upravljanjem in razvojem API-jev Sposobnosti reševanja problemov in sposobnost dela v interdisciplinarnih ekipah Dobre komunikacijske veščine Proaktivna miselnost – prevzemanje pobude, odgovornosti in aktivno prispevanje tudi izven dodeljenih nalog Zelo zanimivo delo in stimulativno delovno okolje Dodatne denarne in druge nagrade Pogodba za nedoločen čas po 6 mesečni poskusni dobi Možnost napredovanja Parkirno mesto Vedno sveže zaloge sadja Neomejena kolicina kave Tedenske masaže Biljard Pikado Teambuildingi Delo od doma po dogovoru Stimulativno plačilo glede na izkušnje, znanje, napredek in dodano vrednost ekipi in podjetju [email protected]

We're hiring a Senior Security Engineer to help shift security left across product and platform teams, while also supporting internal corporate security needs. You'll drive impact through enablement, automation, and practical risk reduction. Why this role matters You'll secure both what we build and how we work. That means embedding security into our products and CI/CD, and also supporting internal teams. Security here is not a gate; it's a force multiplier. You'll help engineering teams move faster safely, and ensure our colleagues have a secure foundation to do their best work. Success means faster, safer releases and fewer reactive security escalations. What will you do? As a Senior Security Engineer, your mission will be to: Partner with developers to embed security into design, build, and deploy stages Automate vulnerability triage and mitigation flows Secure CI/CD pipelines (GitHub, Jenkins) and execution environments (Kubernetes, Docker) Tune WAFs, manage cloud security (AWS, GCP, Azure), and evolve Terraform practices Support internal teams with secure production accesses, endpoint hardening, and access policies Lead security reviews across app, infra, and corporate environments Advocate for security standards with clarity and empathy You might be a fit if you: See security as an enabler of speed, not an obstacle Are comfortable in cloud and on-prem worlds Value autonomy, and naturally take ownership from idea to execution Can zoom out to prioritize risks and zoom in to fix root causes Communicate clearly with devs, ops, and business teams alike Eager to work in a technically challenging environment You'll grow by working with: Terraform, Docker, Kubernetes Modern security tools GitHub Actions, Jenkins AWS, Azure, GCP Teams building external-facing services (web apps, APIs) and internal platforms (CI/CD, admin tooling) to embed security by design. Supporting a public company environment with compliance requirements across multiple standards, including SOC 2 and ISO 27001 Skills that help (we'll support your growth): Application Security: code review, threat modeling, WAF CloudSec: IAM, policy-as-code, workload hardening On-Prem/Corporate: endpoint protection, monitoring and production access control Communication: making risk visible and actionable The Team Environment You'll join a cross-cultural, globally distributed security team that thrives on collaboration, curiosity, and continuous learning. We bring together a wide range of experiences and backgrounds to solve meaningful problems. We support each other through knowledge sharing sessions, workshops, and async collaboration. You'll have the chance to attend industry conferences, participate in internal guilds, and continuously sharpen your skills using our dedicated security training platform. How we work: Autonomy with alignment: own your work, stay connected to purpose Bias for action: ship, learn, improve Enablement mindset: security exists to empower teams, not slow them down Simple and pragmatic: perfect is the enemy of shipped https://job-boards.eu.greenhouse.io/teads1/jobs/4677295101

About the Opportunity & Team This role sits within the Ad Experience team, reporting directly to our Engineering Director based in Montpellier, France. This team is responsible for driving the complete lifecycle of a Creative on the Enterprise side of Teads. We build the core tools that bring digital ads to life: Studio: Our flagship WYSIWYG web application designed to craft and animate rich ad experiences. Creative Editor: A guided workflow for building streamlined creatives quickly and intuitively. Ad Delivery & Players: Proprietary in-browser players that seamlessly render ad formats across millions of web pages. Our technology stack is front-end leaning (Angular, React, and pure TypeScript formats), backed by robust Node.js and Scala services. A major strategic priority for the team is expanding our capabilities by building an intelligent AI agent. This agent will empower creators inside and outside of Teads to design high-performing creatives faster through an innovative, AI-based design scoring system. You will manage and support a dedicated, distributed team of 4 frontend/full-stack engineers (3 based locally in Ljubljana and 1 in Montpellier). You will collaborate daily with a dedicated Product Manager based locally in Ljubljana, while the team's overarching technical vision is further supported by 2 Staff Engineers reporting directly to the Engineering Director. We are looking for someone with Frontend or Full-stack experience. About the Role As the Engineering Manager for Ad Experience, your mission is to mentor, support, and empower your engineering team while collaborating closely with product and cross-functional partners to deliver exceptional creative tools. Success in this role means establishing a highly trusting, psychologically safe environment where engineers can thrive, while ensuring the seamless delivery of our AI agent and core creative applications. We know that great leaders come from diverse backgrounds. You do not need to check every single box to be a strong candidate for this role. If you are passionate about building supportive teams and great products, we want to hear from you. Leadership or Distributed Work Experience: Proven experience guiding and supporting software engineers as a manager, team lead, or mentor; OR significant experience as a senior/principal engineer working autonomously in remote/distributed setups with a strong desire to transition into formal management. Technical Comfort: Strong understanding of modern web ecosystems, comfortably navigating across front-end systems (TypeScript, Angular, or React) and backend setups (Node.js, Scala, or similar). Collaborative Communication: Fluent English with strong active listening skills, empathy, and a highly collaborative approach to problem-solving. Location: Right to work in Slovenia (Ljubljana-based hybrid setup). Bonus Experience building or scaling rich web applications, WYSIWYG editors, canvas tools, or complex web ad formats. Exposure to integrating AI/LLM models or intelligent scoring systems into intuitive, user-facing products. Hands-on experience nurturing cross-border collaboration between international engineering hubs (e.g., France and Slovenia). People Development & Team Culture Nurture and support your team members through regular 1:1s, constructive feedback, and highly tailored career growth plans. Foster an inclusive, trusting, and psychologically safe environment where open communication is championed, diverse perspectives are deeply valued, and ownership is shared. Build strong distributed collaboration practices to maintain a seamless, connected community between your team members in Ljubljana and colleagues in Montpellier. Product Delivery & Technical Direction Partner closely with your local Product Manager and UX design to thoughtfully translate product strategies into actionable milestones, balancing new feature development with platform stability. Guide the continuous development of our creative platforms (Studio, Creative Editor) and browser ad players. Champion the rollout of our AI-assisted design agent and real-time scoring system, encouraging a culture of thoughtful experimentation and shared learning. Operational Excellence & Collaboration Facilitate clear alignment across our full-stack ecosystem (Angular, React, TypeScript, Node.js, and Scala), drawing on the technical expertise of our Staff Engineers. Remove blockers and refine workflows with empathy, ensuring the team can maintain a healthy, fulfilling, and sustainable pace of execution. Connect your team with cross-functional partners across the wider Teads enterprise organization, ensuring your engineers understand the broader business impact of their work. Meaningful scope & real ownership: your scope is bigger than your title. Guide products that power creative experiences for millions of web users globally. Global exposure and genuinely complex challenges at real scale: 2.2Bn users / month and 18Bn ad opportunities / day. Smart, ambitious peers across 30+ markets in a highly collaborative, cross-border setup. A genuinely human culture: high care alongside high accountability, where your well-being and flexibility matter. Real investment in your growth: mentorship, coaching, courses, workshops, certifications, and management programs. https://job-boards.eu.greenhouse.io/teads1/jobs/4981050101

About us You'll join MTS (Managed Trading Services) - the platform behind Sportradar's risk betting management, processing millions of bets in real time for operators around the world. Our teams own high-throughput, low-latency services: risk and liability, odds and offer, ticket validation, and the data plane that feeds them. We work in a modern cloud-native stack: Java (Spring Boot / Quarkus), Kafka / MSK, gRPC & Protobuf, AWS (EKS, ECS, DynamoDB, Aurora), ArgoCD / GitOps, Terraform, and observability on Grafana, Prometheus and OpenTelemetry. This is a great place to level up: you'll ship real features to production quickly, learn a genuinely rich domain, and grow toward owning larger pieces of it. The challenge - Design, build, test and ship backend services and APIs that are part of a larger, real-time system; and see them through to production. - Deliver in small increments. Break work into concrete, independently shippable pieces that land and get validated as you go, rather than accumulating into one big drop. - Own your changes in production; help with monitoring, alerting and the occasional on-call, and learn how your services behave under real load. - Write clean, well-tested, documented code, take part in code review, and help capture key decisions so the team can build on them. - Learn the MTS ecosystem; how the interconnected services fit together; and grow the independence to make more calls yourself over time. - Work with product managers and senior engineers to turn requirements into well-shaped, deliverable work. - Use modern, AI-assisted development; we actively encourage spec-driven, agentic workflows to move faster with quality. About you Must-have skills - 2+ years of professional experience with Java (Spring Boot, Hibernate, or similar modern frameworks) or another strong OO language. - Good grasp of computer science fundamentals and clean, testable code. - Solid understanding of automated testing; unit, integration, and API testing (JUnit, Mockito, or similar). - Comfortable with CI/CD and collaborative git workflows. - AI-assisted, spec-driven development as part of your day-to-day workflow; not just autocomplete. - Willingness to run what you build; going beyond writing code to owning your changes in production (deployment, monitoring, on-call). Nice-to-have skills - Exposure to AWS, Kafka, Docker / Kubernetes, or relational and NoSQL databases. - Familiarity with gRPC / protobuf, Rest API design, or event-driven systems. - Interest in IaC (Terraform), GitOps, or observability tooling. - Interest in betting, trading, or other real-time / high-throughput domains. Personal traits - Eager to learn; a complex domain and a modern stack, quickly. - Takes ownership of their work and wants to grow toward owning features end-to-end. - A collaborative teammate with good communication who asks questions and gives honest input. - Pragmatic, with a bias toward shipping small and often. - A positive, can-do attitude and a commitment to high professional standards. Our offer - A collaborative environment with colleagues from all over the world (Engineering offices in Europe, Asia, and the US), including various social events and teambuilding. - Ability to shape your own workday and career via a clearly defined professional and personal development plan. - Opportunity to develop yourself within an inspiring and fast-growing company with our Career framework possibilities. - Vibrant and inclusive community, including Women in Tech and Pride groups, which welcome all participants. - Global Employee Assistance Programme. - Calm and Reulay app (managing stress, maintaining focus, improving sleep, building resilience). - Online training videos. - Flexible working hours. While we appreciate the flexibility and benefits of working from home, we strongly believe that coming together in person fosters stronger connections, encourages collaboration, and drives innovation; both as individuals and as a company. The energy, shared ideas, and team support we experience in the office strengthen the foundation of our success and culture. For this reason, we are an office-first business operating on a fully on-site model, with team members working in the office five days a week to build relationships, exchange ideas, and grow together. Certain exemptions may apply depending on location; your local point of contact can provide further details. Our recruitment process - Initial screening: a quick video chat with our Talent Acquisition Partner. - Introduction interview: meet the technical team and hiring manager to dive into the team and your expertise. - Technical assessment: a short home task with emphasis on your AI-assisted, spec-driven development skills; showing how you use agentic workflows to deliver. - Final interview: discuss your solution and team fit with additional team members. - Final steps: feedback and, if successful, an offer. https://smrtr.io/B-Dps

About us: As a Data Scientist in Sportradar's AI unit, you will work withing an established, high performing team of experts on the design, development and deployment of predictive models and algorithms powering Spotradar's products. You will leverage Sportradar's extensive sports datasets, betting transaction data and user interaction data collected through Sportradar's products and services reaching millions of end-users across the globe. The position will be focused on the development of AI and advanced analytics solutions for sportsbook risk management and liquidity driven odds trading, collaborating closely with product owners and technical leads in our Managed Trading Services and Odds Services product domains. Sportradar is a global leader in understanding and leveraging the power of sports data for hundreds of business customers around the world, in turn entertaining millions of sports enthusiasts. The challenge: - Analyse and explore data using statistical analysis tools and scripting. - Develop machine learning or statistical models for use in our sportsbook risk management and odds trading products and services. - Rigorously validate methods, models, algorithms and hypotheses using back-testing on historical data and/or simulations. - Bring models into production leveraging our AI platform, maintaining ownership of the AI solution throughout the model development lifecycle, from modelling to production deployment, monitoring and continuous model improvement. - Design and implement novel methods for data analysis, tailored to our sports-related application domains and propose new ways of using data to improve our products and services. - Present ideas and solutions to software developers and business stakeholders in a clear and understandable way. About you: - The successful candidate will be knowledgeable in machine learning and statistics. - Strong programming skills and software development experience needed to productize low latency streaming analytics solutions are a must. - Experience with risk management and portfolio optimization in financial, gaming or sports betting contexts is a plus. - Experience in data science, statistical modelling, applied mathematics and/or software engineering. - Profficiency with advanced querying of large analytical databases using SQL. - Programming experience is a must. - Experience with Python, R or similar statistical and/or machine learning software/toolkits. - Bonus: Experience working in Java. - Bonus: Hands-on experience with real-time streaming analytics frameworks such as Apache Flink and streaming technologies such as Apache Kafka. - Bonus: Experience working with Mac/Linux environments. - Bachelor of Science in Mathematics / Statistics, Computer Science / Engineering, or related field; equivalent experience acceptable. - Fluent in English (written and spoken). - Autonomous, rigorous, creative and a team player. Our offer: - A collaborative environment with colleagues from all over the world (Engineering offices in Europe, Asia and US) including various social events and teambuilding. - Flexibility to manage your workday and tasks with autonomy. - A balance of structure and autonomy to tackle your daily tasks. - Vibrant and inclusive community, including Women in Tech and Pride groups which welcome all participants. - Global Employee Assistance Programme. - Calm and Reulay app (leading well-being apps designed to support focus, quality rest, mindfulness, and long-term mental resilience). - Online training videos. - Flexible working hours. https://smrtr.io/zqJ7y