mediasmart Logo

mediasmart

Senior Full Stack Engineer

Posted 3 Days Ago
Be an Early Applicant
Remote
Hiring Remotely in Spain
Senior level
Remote
Hiring Remotely in Spain
Senior level
Develop and maintain the web platform (frontend and backend), deliver features in short cycles, improve product usability, collaborate with cross-functional teams, handle DevOps and deployments, and focus on backend/cloud strengths when applicable.
The summary above was generated by AI

Do you want to work for one of the biggest consulting companies in Spain, working more than 12 hours a day and not having a life? We don’t either. So come and be part of a cool worldwide company, building things that matter to a real business, learning and making an impact while also enjoying your life. Our motto is: "Life before work".

At​ ​mediasmart​ ​we​ ​are​ ​looking​ ​for​ ​a​ software ​engineer​ ​to​ ​join​ ​our ​team,​ ​whose​ ​main​ ​function​ ​will​ ​be​ ​to develop for the main products we offer to users: the API and the web frontend.

About mediasmart

mediasmart is part of the Affle group - a global adtech company that completed its successful IPO in India in 2019 and has been growing profitably since. Affle group has been in the adtech/martech business for over 15 years and runs multiple ad platform businesses including Appnext, MAAS, mDMP, Jampp, RevX, Vizury, Youappi in addition to mediasmart.

Some of the key investors in Affle Holdings include Microsoft and D2C (JV between NTT DoCoMo & Dentsu).

At mediasmart, our mission is to allow advertisers to effectively reach audiences across their digital journeys in real time, while maximizing engagement with campaigns and their incremental value to advertisers. mediasmart was one of the first players to enter the programmatic mobile ecosystem and to date our proprietary technology stack includes a DSP, DMP & Ad-Server, as well as direct connections to more than 30 ad exchanges where we buy display, video and native ads on mobile apps, Connected TVs, DOOH and desktop.

The mediasmart business is headquartered in Spain having fast growing global teams across APAC, LATAM in addition to Europe

Our culture and values

  • Be a generous team player. One that helps others succeed and celebrate their success.
  • Love curiosity. Keep learning and stay relevant.
  • It’s a team effort. Collaborate and cooperate to build a smart company.
  • Go farther. Be an example for others. Set the bar.
  • Love what we do. Love our work with passion and respect.
  • Do good and do well. Our work matters.

We work hard and never forget to have fun in the process. Absolutely devoted to our customers and to building the best mobile advertising company out there, our passion shines through everything we do.

Summary & Duties

As a Senior Full Stack Engineer in our product technology team, you will play a key role in developing our web platform, serving large agencies and direct customers. Your responsibilities will span the entire product lifecycle, from initial concept to DevOps and deployment.

  • Deliver new features in short development cycles.
  • Polish a web-based platform (frontend and backend) with users all over the world.
  • Proactively improve and propose projects to make our product more effective and easy to use.
  • Interact with other teams to build new features or solve technical issues.
  • Individuals with stronger backend and cloud abilities will find this position customizable to their skills.

Requirements

  • At least 4-5 years of experience as a full-stack developer
  • Strong knowledge of JavaScript and ES6
  • Wide experience with Node.js and REST APIs
  • Experience with MongoDB database
  • Familiarity with cache databases, its data structures and operation commands
  • GNU/Linux administration
  • Exposure to cloud: AWS, GCP, Azure…
  • Proficiency in Spanish (native level), both oral and written, as this is the language used for interaction with the team. 
  • Fluent in English, both oral and written, as this is the language used for interaction with most of the stakeholders and the business language for all our tools and documentation.

Desirable requirements

  • Experience working in a distributed team
  • AWS: In particular EC2, S3, Route53, Elastic Transcoder, load balancing, and CloudFront
  • Experience working with relational databases: in particular GCP BigQuery

Skills

  • Analytical, curious, goal-oriented
  • Strong orientation to detail, with an ability to collect and organize data, understand the results, and communicate them effectively
  • Having a good eye for design
  • Excellent interpersonal and communication skills, both written and oral
  • Ability to motivate others to work as a team to meet the business case and customer goal
  • Strong influencing and negotiating skills
  • Being proactive
  • Ability to take personal initiative and prioritize workload whilst being a team player within a collaborative environment

Similar Jobs

Yesterday
Remote
Senior level
Senior level
Artificial Intelligence • Software • Generative AI
Build, deliver, and maintain a customer dashboard using TypeScript and React that interacts with Python/FastAPI backend services. Collaborate with cross-functional teams, design APIs, ensure high-scale performance, analyze dashboard metrics using SQL, and contribute product ideas and stakeholder communications.
Top Skills: AthenaAWSAws LambdaAzureClickhouseDjangoFastapiFlaskGCPJavaScriptLlmsMySQLPostgresPythonReactService-Oriented ArchitectureSQLTransformersTypescript
3 Days Ago
Remote
Senior level
Senior level
Artificial Intelligence • Information Technology • Machine Learning • Software
Join a small remote team to design, build, and grow Lingo.dev’s web apps, open-source tooling (CLI, webpack/vite plugins), backend APIs, PostgreSQL database, integrations, and AI agents. Own features end-to-end with tests and documentation, participate in sprint cycles and weekly demos, and collaborate closely with founders and users.
Top Skills: Express.JsNode.jsPostgresReactTypescriptViteWebpack
4 Days Ago
Remote
Senior level
Senior level
Artificial Intelligence • HR Tech • Software
Lead architecture and implementation of scalable full-stack features using NestJS and Next.js, integrate LangChain-driven AI, manage PostgreSQL schemas and performance, build responsive UIs with Tailwind CSS, implement authentication with Clerk, and ensure reliability with Puppeteer-based testing and automation.
Top Skills: ClerkLangchainNestjsNext.JsPostgresPuppeteerTailwind Css

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account