Senior Mobile Engineer (Android / iOS, On-Device & SDK)

Job Description
What We Do
At Goldman Sachs, our Engineers don’t just make things – we make things possible. Change the world by connecting people and capital with ideas. Solve the most challenging and pressing engineering problems for our clients. Join our engineering teams that build massively scalable software and systems, architect low latency infrastructure solutions, proactively guard against cyber threats, and leverage machine learning alongside financial engineering to continuously turn data into action. Create new businesses, transform finance, and explore a world of opportunity at the speed of markets. Goldman Sachs Engineers are innovators and problem-solvers, building solutions in Artificial Intelligence, risk management, big data, mobile and more.

Cloud Platform
As a GBM (Global Banking & Markets) Cloud Engineer at Goldman Sachs, you will play a pivotal role in shaping the future of the GBM technology landscape. This is a unique opportunity to partner directly with core engineer and GBM engineering teams, architecting and delivering cloud-native solutions that power our most critical trading and financial systems. You will be instrumental in developing solutions for broad adoption across thousands of engineers in GBM.

You will join a multi-disciplinary team dedicated to researching, architecting, and building reusable cloud patterns. Your focus will be on enabling GBM teams to deploy and manage services in the public cloud with unparalleled safety, security, and efficiency. Given the extreme requirements of GBM – from ultra-low latency trading platforms to high-throughput data processing – you will be challenged to leverage and integrate best-of-breed cloud solutions and innovative architectural patterns. As we continue to modernize our services around cloud-native principles, you will directly contribute to a platform that empowers GBM engineers to innovate faster and deliver market-leading solutions.

Responsibilities And Qualifications
We are seeking highly collaborative, creative, technical and intellectually curious engineers who are passionate about developing and implementing cutting-edge cloud computing solutions tailored for the demanding environment of GBM. The ideal candidate will thrive in a dynamic DevOps culture, contributing to customer-centric product development that directly impacts our business. You will work closely with cross-functional teams, acting as a creative collaborator who can evolve, adapt to rapid change, and thrive in a fast-paced, global environment. Your ability to translate complex GBM requirements into scalable, secure, and performant cloud architectures will be key to your success

Key Responsibilities

• Lead, mentor, and grow a team of talented cloud engineers, fostering a culture of technical excellence, collaboration and continuous learning.
• Oversee the development and maintenance of a comprehensive set of ready-to-consume cloud patterns and solutions.
• Partner with application development teams to facilitate the migration of existing applications and development of new cloud-native applications on public cloud platforms such as AWS and hybrid architectures.
• Champion a frictionless and intuitive cloud onboarding experience for developers, accelerating their transition to public cloud.
• Define and prioritize product feature requests that align with the firm’s business and engineering priorities.
• Ensure all cloud patterns and solutions are built with a “security-first” mindset, adhering to the highest security standards and best practices.
• Drive the implementation of architectural best practices and solutions that are highly available, resilient and scalable.
• Collaborate with other platform teams and stakeholders to define the product’s roadmap and strategic vision.
• Provide engineering leadership with regular insights into the progress of customer migrations, reporting on key wins and roadblocks.
• Server as a key member of the customer advisory board to gather customer feedback on their cloud onboarding goals, challenges and feature requests.
• Take an active role in cloud governance, ensuring that any application deployed to production meets the standards set by the firm and fulfills applicable regulatory requirements.

Basic Qualifications

• Minimum of 10 yrs of relevant professional experience with deep expertise in public cloud services (preferably AWS).
• Bachelor’s degree in computer science, engineering, or a related field (or equivalent practical experience).
• Proven experience as an Engineering Manager or a Senior Technical Lead, with a focus on cloud-native development or platform engineering.
• Strong understanding of cloud architecture, microservices, and containerization (eg: Docker, Kubernetes).
• Experience with building secure, highly available and scalable systems especially in a large, enterprise-level organization.
• Experience with hybrid cloud solutions and integrating with on-premise systems.
• Excellent leadership, communication and interpersonal skills.

About Goldman Sachs
At Goldman Sachs, we commit our people, capital and ideas to help our clients, shareholders and the communities we serve to grow. Founded in 1869, we are a leading global investment banking, securities and investment management firm. Headquartered in New York, we maintain offices around the world.

We believe who you are makes you better at what you do. We're committed to fostering and advancing diversity and inclusion in our own workplace and beyond by ensuring every individual within our firm has several opportunities to grow professionally and personally, from our training and development opportunities and firmwide networks to benefits, wellness and personal finance offerings and mindfulness programs. Learn more about our culture, benefits, and people at GS.com/careers .

We’re committed to finding reasonable accommodation for candidates with special needs or disabilities during our recruiting process. Learn more: https://www.goldmansachs.com/careers/footer/disability\-statement.html

Opis stanowiska
Dołączysz do zespołu Działu R&D, który współtworzy rozwiązania analityczne i backendowe dla największej internetowej telewizji w Polsce, należącej do wiodącej grupy medialno-telekomunikacyjnej w regionie. Pracujesz wśród entuzjastów programowania, w kulturze, w której każdy kod przechodzi obowiązkowe code review, a projekty prowadzimy metodami Agile.

Czym będziesz się zajmować
Tworzeniem wysokowydajnych rozwiązań analitycznych do zbierania i przetwarzania dużych wolumenów danych w czasie rzeczywistym oraz prezentowania ich na potrzeby biznesu.

Rozwojem usług backendowych i pipeline'ów danych zasilających analitykę i produkty medialne.

Współpracą z zespołem przy projektowaniu architektury i doborze narzędzi do nowych wyzwań.

Nasz stack technologiczny
Języki:
głównie Python 3.11+; korzystamy też z Javy (w skali całego pionu występują dodatkowo m.in. C#, Go, Ruby, JavaScript, Objective-C).

Dane / streaming:
Apache Big Data stack – Kafka, Flink, Spark, Druid, HBase, Hadoop; RabbitMQ.

Backend / API:
Flask, Django, Falcon.

Bazy i wyszukiwanie:
PostgreSQL, MongoDB, Elasticsearch.

Nasze oczekiwania
Czego oczekujemy
Bardzo dobrej znajomości Pythona, popartej komercyjnym doświadczeniem.

Znajomości Javy (na poziomie umożliwiającym rozwój i utrzymanie usług).

Pasji do technologii i chęci ciągłego samodoskonalenia – lubisz być na czasie z tym, co dzieje się w branży.

Umiejętności pisania testów i dbania o jakość kodu.

Dobrej komunikacji i umiejętności pracy w zespole.

Znajomości angielskiego na poziomie umożliwiającym czytanie i pisanie dokumentacji technicznej.

Mile widziane
Znajomość rozwiązań ML, w szczególności LLM, embeddings, vector search i RAG.

Znajomość naszego stacku technologicznego.

Doświadczenie w projektowaniu architektury aplikacji (np. SOA, mikroserwisy).

Doświadczenie w optymalizacji kodu i wydajności systemów przetwarzających duże wolumeny danych.

Otwartość na inne technologie i języki programowania.

Co oferujemy
Realny wpływ na produkty docierające do milionów użytkowników i pracę przy nietrywialnych wyzwaniach z zakresu przetwarzania danych.

Swobodę w wyborze środowiska pracy i narzędzi, w których tworzysz kod.

Pakiet benefitów: Luxmed, Multisport oraz korzystne ubezpieczenie grupowe.

Dofinansowanie do nauki języka angielskiego.

Do you want to develop your skills in cloud technologies? Join our specialized unit of experts in data processing and analysis within the Data & Analytics Competency Center. We also offer development opportunities in Data Science, Big Data, and Machine Learning.

Your tasks

• Designing, building, and developing scalable and high-performance data processing platforms in Data Lake / Data Platform architecture
• Creating and maintaining ETL/ELT pipelines to integrate data from various sources and process it in Azure Databricks environment
• Data modeling and preparing data structures tailored to analytical and business needs
• Implementing data processing solutions (batch and/or near real-time)
• Monitoring, optimizing, and developing existing pipelines and data processing workflows
• Collaborating with data analysts, BI teams, and Data Science teams to prepare and provide data
• Gathering business requirements and proposing optimal technological solutions
• Creating and maintaining technical documentation for developed solutions
• Supporting and mentoring less experienced team members, sharing knowledge and best practices

Requirements

• Minimum 4 years of experience in projects related to processing and integrating large volumes of data
• Strong knowledge of SQL and Python
• Experience working with data processing frameworks such as Apache Spark / PySpark
• Practical experience in designing and building Data Lake and Data Warehouse solutions
• Ability to build and maintain ETL/ELT pipelines and work with data orchestration and integration tools
• Commercial experience in Microsoft Azure cloud-based data processing projects (e.g., Databricks, Azure Data Factory, Synapse, Fabric)
• Knowledge of data processing concepts in distributed environments and pipeline optimization
• Fluent communication skills in English
• Fluent Polish language proficiency required
• Must be located in Poland

Nice to have

• Experience in data migration projects from on-premise to cloud (databases: Oracle, PostgreSQL, MS SQL)

Job no. JOB-QAKZG

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care

We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in.

At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation

.

We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support yo

u!At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirement

s.

In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best se

**lf.

We also offer a competitive benefit package and plenty of opportunities to stretch and grow your car**

• eer:

23,000 - 28,000 PLN gross per month on an employment con

• tractPrivate medical healthcare at LUXMED (including dentalcare) for you and your f
• amilyMedicover sports card (Fit&More pac
• kage)Life insurance financed by the emp
• loyer30-minute lunch break included in the 8-hour workin
• g dayWork in a highly professional and stimulating atmos
• phereTraining & Buddy programme that will allow you to quickly adapt to your new
• roleWellbeing programme for empl
• oyeesCo-financing of monthly tickets for the public transport in K
• rakowComfortable working environment in the office and the possibility of home o
• fficeLanguage courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certific
• ationEmployee referral prog

**ramme

Role Pur**

pose:

The Senior Data Designer role supports the business by deciding what data should be ingested from source systems into the Enterprise Data Warehouse, and how this data should be transformed to make it suitable for consumption in reporting or other downstream s

ystems.

The role is accountable for: analysing and documenting source systems’ data as needed to meet the business requirements; determining the method and frequency for ingesting the data into the data warehouse; defining and documenting any data mapping, harmonisation, derivations, calculations, or other transformations required to make the data easy to use by the business; ensuring that the target data model is coherent and works in conjunction with the other data models in the data wa

**rehouse.

Responsib**

ilities:

•Designing data warehouse solutions driven by busine

ss demand.•Understanding difficult solution requirements, working with the business to clarify them if

necessary.•Identifying and documenting the possible data sources that may be required and analyse/profile the data they contain; working with the source system and/or business experts to understand how the business processes create and up

date data.•Creating and maintaining logical and physical data models for the data warehouse solutions, working with the Platform Data Architect to ensure they fit with the data roadmap and p

rinciples.•Creating and updating source to target data mappings, defining transformations and calculations, and capturing metadata (e.g. attribute definitions, datatypes, PII classification, etc.) working with the Platform Principal Data Designer to make sure they are in line with our principles and co

nventions.•Supporting Data Engineers in the implementation of th

e designs.•Supporting Quality Engineers in the testing of the data warehous

e objects.•Providing guidance to junior members of the team on data modelling and/or technical best

practices.•Supporting the wider team with other ad-hoc design or anal

**ysis work.

Requir**

ed Skills:

•Intermediate-level SQL querying, including dat

a profiling.•Strong attentio

n to detail.•A proactive and curi

ous mindset.•A collaborative appro

ach to work.•2 years experience as a data modeller or 5 years experience of working with data in data

warehouses.•Data quality management

**experience.

Desirabl**

e Experience:

•Experience of non-tabular data and event-based da

ta processing.•Understanding of data lifecyc

le management.•Experience of working with data

in Databricks.