Hire the Top 3% of Freelance Business Intelligence Developers
Toptal is a marketplace for top business intelligence developers, engineers, programmers, coders, architects, and consultants. Top companies and startups choose Toptal business intelligence freelancers for their mission-critical software projects.
Tiger has 25 years of experience in database development and administration and IT project management. He has implemented large-scale system integrations and business intelligence (BI) projects in various industries, including retail, government, and education. His expertise spans SQL Server, MySQL, Oracle, Access, SSAS, SSRS, SSIS, Power Apps, Power BI, C#, VB.NET, Delphi, PHP, and Java. As the sole DBA at a retail company, Tiger helped boost sales from $5 million to $15 million in four years.
Mohammed is a business intelligence developer with strong technical skills and experience developing in the IBM Cognos Analytics platform. He has implemented multiple projects from start to finish—designing, building, testing, and deploying various actionable reports and dashboards. His work has always been well-received by clients and team members alike. Mohammed uses a proactive approach, taking the initiative to solve problems as they arise during development.
Having 17+ years of data engineer/business intelligence industry experience and being a Microsoft Power BI Certified Professional, Jag has tremendous BI experience working with data at some of the top 10 Fortune companies in the world. He enjoys working with data, developing robust BI solutions for the clients to enhance their decision-making. Jag has completed many end-to-end BI projects with high-volume data and complex reporting requirements, presenting them visually as storytelling insights.
Sampath is a highly skilled business intelligence (BI) professional with over 15 years of experience in business intelligence, geospatial analytics, predictive planning, and statistical analysis. Proficient in tools such as Microsoft Power BI, IBM Cognos, Looker, QlikView, Tableau, and Table Manager 1 (TM1), he excels in databases, SQL, and the Statistical Analysis System (SAS). Sampath is eager to leverage his comprehensive skillset and embrace new, challenging projects.
James is a lead data warehouse and BI developer with over 15 years of experience in business intelligence, from design and development to support and testing. He has worked on numerous greenfield projects and reworks of existing implementation projects, and his industry experience covers private banking, accounting, manufacturing, travel, and law. James takes pride in his work and values trust and open communication.
Elyes is a senior business intelligence (BI) expert with 16 years of experience working for worldwide clients. He specializes in ETL processes, particularly utilizing tools such as SAP BusinessObject Data Services (BODS) and Otic. Proficient in SQL, Microsoft SQL Server, and Oracle, he seamlessly integrates cloud technologies with BI systems. Elyes holds many certifications in IBM Cognos administration, design, and reporting, as well as IBM TM1 and Cloud platforms.
Ahmed is a data architect with extensive experience in business intelligence, data warehousing, data governance, data management, data quality, and data modeling. He has proven experience gathering business requirements from business users, defining KPIs, mapping to databases, defining data quality issues, and designing reports and visualization systems. Ahmed is a great team player with comprehensive business, analytical, and technical skills.
Ekaterine is a highly qualified SQL developer and Microsoft Power BI-certified data visualization specialist. She has been working in the IT industry for over four years and has experience working in the renewable energy, consulting, financial, gambling and casinos, and telecommunications industries. Ekaterine is a highly dedicated employee who strives to succeed and meet the requirements of the company.
Rached is an expert in business intelligence (BI) who uses workshops to help executives, managers, and front-line workers make data-driven business decisions. He has managed multiple BI implementation projects in large and medium-sized companies from various industries—banking, transportation, hospitality, and retail. Rached is proficient in Domo and Power BI, managing the connection to data sources, the transformation, and the visualization of data to build great dashboards.
Lincoln is a developer with over 15 years of experience developing and implementing business intelligence (BI) and data warehouse solutions, SAP ERP solutions, and software along with general web design and development. His expert skillset includes SQL, T-SQL, stored procedures, MS SQL Server & Oracle, data warehouse & ETL, MS SSIS, SSRS/SSAS, Power BI, Microsoft Azure SQL Database, Synapse Analytics, Data Factory, Databricks, Google BigQuery, AWS RDS and RedShift, and Python programming.
Sidney is an experienced business intelligence and data engineer. His expertise includes BI dimensional modeling, data pipelines, dashboards, reports, and handling API-related data. He has served as team scrum master, led migration and upgrade projects, mentored team members, and was recognized as the top employee for his ability to build excellent client relationships.
Business Intelligence developers are professionals who possess the skills to turn complex data into actionable insights and facilitate better decision-making within companies by building data-driven solutions. This guide features key information, interview questions and answers, and best practices that will help you identify and hire the right Business Intelligence developer for your company.
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I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.
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The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.
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Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.
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Principal
How to Hire Business Intelligence Developers Through Toptal
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2
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Within days, we'll introduce you to the right business intelligence developer for your project. Average time to match is under 24 hours.
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The Right Fit, Guaranteed
Work with your new business intelligence developer for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.
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What is the typical range of costs that an enterprise should expect to budget for business intelligence development services?
The costs of BI development services can vary widely depending on the scope, complexity, and specific requirements of a project. They also are tied to factors like an organization’s region, size, the amount of data to be processed, the number of users who consume the data, the level of data integration, and the desired functionality.
A basic BI project typically involves setting up a simple data warehouse, basic data visualization, and reporting. The development time for such projects falls into the range of a few weeks to a few months, depending on the complexity and availability of data.
A complex BI project involves more extensive data integration originating from multiple sources, advanced data warehousing, complex data modeling, and custom reporting and visualization. The project timeline may range from several months to a year or more, depending on the complexity and scale of the implementation.
The ongoing maintenance costs of BI projects will vary as a percentage of the initial development cost. As a general rule of thumb, organizations should budget 15% to 20% of the initial development cost per year for ongoing maintenance.
How do I hire a business intelligence developer?
To hire the right business intelligence developer, it’s important to evaluate a candidate’s experience, technical skills, and communication skills. You’ll also want to consider the fit with your particular industry, company, and project. Toptal’s rigorous screening process ensures that every member of our network has excellent experience and skills, and our team will match you with the perfect business intelligence developers for your project.
Can you hire business intelligence developers on an hourly basis or for project-based tasks?
You can hire business intelligence developers on an hourly, part-time, or full-time basis. Toptal can also manage the entire project from end-to-end with our Managed Delivery offering. Whether you hire an expert for a full- or part-time position, you’ll have the control and flexibility to scale your team up or down as your needs evolve. Our business intelligence developers can fully integrate into your existing team for a seamless working experience.
How quickly can you hire with Toptal?
Typically, you can hire a business intelligence developer with Toptal in about 48 hours. For larger teams of talent or Managed Delivery, timelines may vary. Our talent matchers are highly skilled in the same fields they’re matching in—they’re not recruiters or HR reps. They’ll work with you to understand your goals, technical needs, and team dynamics, and match you with ideal candidates from our vetted global talent network.
Once you select your business intelligence developer, you’ll have a no-risk trial period to ensure they’re the perfect fit. Our matching process has a 98% trial-to-hire rate, so you can rest assured that you’re getting the best fit every time.
How are Toptal business intelligence developers different?
At Toptal, we thoroughly screen our business intelligence developers to ensure we only match you with the highest caliber of talent. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut.
In addition to screening for industry-leading expertise, we also assess candidates’ language and interpersonal skills to ensure that you have a smooth working relationship.
When you hire with Toptal, you’ll always work with world-class, custom-matched business intelligence developers ready to help you achieve your goals.
What is the no-risk trial period for Toptal business intelligence developers?
We make sure that each engagement between you and your business intelligence developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you’re completely satisfied with the results, we’ll bill you for the time and continue the engagement for as long as you’d like. If you’re not completely satisfied, you won’t be billed. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial.
Nicolas is a data scientist with more than 24 years of experience designing and developing innovative AI/ML solutions. He is a published author and thought leader. In addition to a doctoral research fellowship in advanced quantitative economics, he also holds two interdisciplinary master’s degrees focusing on economics, data science, and technology.
Business Intelligence Developer Demand Is Skyrocketing Globally
The rate at which data is increasing is astounding, and the business intelligence (BI) market is keeping pace. The March 2023 issue of Fortune Business Insights stated that the global business intelligence market size, valued at more than $29 billion in 2023, is projected to grow to $55 billion by 2030—an annual average CAGR of 9.1%. Fueled by the growth of analytics and the adoption of cloud-based AI/ML services, along with the growing demand for flexible architecture and adaptable solutions, the need for business intelligence developers is on the rise.
At first glance, finding proficient BI developers for hire might appear straightforward. Given that the BI practice is well established, it’s reasonable to expect a plentiful supply of experienced specialists. However, while it is common for established businesses to retain veteran BI specialists who focus on data reporting, the nature of data has profoundly evolved, becoming more multifaceted and abundant in the modern business landscape. Consequently, the industry demands an increasing number of BI developers who can expertly navigate these complexities.
By delineating the qualities that differentiate experts from ordinary BI developers, this guide will enable you to better identify the professional best suited to your business needs. Additionally, this guide provides insights on crafting effective job descriptions and lays out interview questions and prompts to help you make informed hiring decisions.
What attributes distinguish quality Business Intelligence Developers from others?
Quality business intelligence developers are distinguished by their blend of technical and soft skills. Their technical skills enable them to navigate the evolving BI ecosystem, build data pipelines, set up databases, write queries, craft reports, create visualizations and interactive dashboards, mine data, develop algorithms for pattern recognition, and perform predictive analytics. With their strong analytical abilities, they interpret complex data to identify patterns and extract insights that guide decision-making.
Soft skills enable quality developers to interact with stakeholders and work effectively within diverse teams. The array of a business intelligence developer’s responsibilities can vary significantly from company to company, often expanding beyond the conventional template to span BI analysis and engineering tasks. This dynamic often blurs the lines between the roles of the BI developer, BI analyst, and BI engineer, but a top-tier BI expert can wear all three hats.
Technical Skills
Programming language(s) – Programming languages allow BI experts to handle complex data transformations and custom calculations that may not be easily achievable using standard tools. The specialized libraries for statistical analysis and data visualization in Python and R, in particular, augment a BI developer’s analytical prowess, allowing them to deliver more tailored and sophisticated solutions for data-driven decision-making. In addition, SQL proficiency should be considered mandatory. SQL enables efficient data extraction and manipulation by retrieving relevant information from tables, merging datasets for analysis, and generating the aggregated results to obtain key metrics. These skills empower a BI expert to derive valuable insights from data, facilitating better decision-making and process optimization within a business.
Data modeling – Designing the structure and organization of data within a database, a BI expert defines the data types of table fields and establishes relationships between tables. They leverage data modeling notations like entity-relationship (ER) diagrams and Unified Modeling Language (UML) to create conceptual, logical, and physical data models.
Data warehousing – While not a BI responsibility per se, warehousing knowledge contributes to a BI developer’s broader understanding of the data life cycle. They handle diverse data sources and formats using Extract, Transform, Load (ETL) processes using products like Informatica, Azure Data Factory, Talend Data Integration, IBM InfoSphere DataStage, and Oracle Data Integrator. They implement workflows for both batch and real-time data processing to ensure seamless data integration. They master dimensional modeling, such as Online Analytical Processing (OLAP) cubes. They also consider the strengths of different database management systems—relational (like Oracle, MySQL, SQL Server, PostgreSQL) versus NoSQL (like MongoDB, Cassandra, and Redis)—to build scalable data storage structures.
Data governance – A BI developer enables effective data management by ensuring compliance and data integrity through data governance. They conduct audits, implement metadata management, and set up data lineage. They document data comprehensively and create data dictionaries that provide clear guidance to team members and stakeholders who use the data. They manage the data life cycle—from creation to archival—to optimize its storage and retrieval.
Data visualization – Business intelligence developers apply visualizations to create intuitive dashboards and reports that enhance data analysis for end users. They present information in a clear and engaging manner, applying user-centric design principles. They achieve visualizations using tools like Tableau, Power BI, Looker, Qlik, ThoughtSpot, Business Objects, and Cognos, and/or open-source frameworks like Shiny, ggplot2, Dash, Plotly, and Flask to build interactive data visualizations.
Cloud computing – A skilled BI developer has experience with cloud-based BI platforms like Redshift, BigQuery, Azure Synapse, and Snowflake, all of which enable the seamless scaling of data processing and storage, accommodating growing data volumes without the need for hardware investments. Flexible data querying options empower developers to create sophisticated data models for deeper insights.
Soft Skills
A BI expert rounds out their technical knowledge with a variety of soft skills. Analytical and critical thinking skills maximize business performance by empowering the BI expert to pinpoint relationships between seemingly disparate data sets, enabling them to derive meaningful conclusions.
In addition, communication and visual storytelling skills help a BI expert bring data insights to life, linking them to key business goals. A strong candidate should be able to distill complex information into digestible formats, ensuring that technical concepts are understandable to nontechnical team members. This clarity facilitates informed decision-making by stakeholders and drives actions that align with an organization’s business goals.
How can you identify the ideal Business Intelligence Developer for you?
To identify the ideal BI developer for you, it’s crucial to begin with a clear identification or statement of your specific business needs. What are your existing or desired cloud/hybrid/on-premises data and BI platforms? What programming languages, visualization tools, and databases do you use or plan to use?
Addressing these questions facilitates the identification of skills gaps within the team. Use the following information to determine the experience level to target and which business intelligence skills to prioritize, based on your specific business cases.
Junior
A junior BI developer receives coaching from senior team members and focuses on data extraction, report generation, and basic data analysis. They leverage SQL and data visualization tools to retrieve and present data in meaningful ways, while also performing basic data manipulation to support decision-making processes. These developers are particularly valuable when systems are already in place, and there are specific data-related tasks to accomplish, like adding tables to a data model, extracting data from a database for analysis, or creating simple to medium-complexity visuals.
Mid-level
A mid-level BI developer has experience in the field, which makes them a good choice for designing, developing, and implementing solutions with minimal supervision. They are capable of making minor to medium-complexity changes to a project’s data model and pipelines, optimizing performance, focusing on automation, gathering requirements from stakeholders, and building medium to complex interactive dashboards. A mid-level BI developer is ideal for managing mid-sized projects.
Senior
A senior BI developer, with an extensive background and long-standing experience in the field, possesses the expertise to handle intricate tasks. Their responsibilities include gathering requirements, holding direct communications with a project’s stakeholders, and offering strategic insights. They design data models and create advanced analytical solutions. A senior BI developer is typically afforded greater autonomy and decision-making authority, positioning them to identify potential areas of improvement. They possess a deep understanding of business processes and can adeptly choose the right technology tools that seamlessly integrate with your existing infrastructure. A senior BI developer is ideal for jump-starting your project’s BI practice, given their ability to implement databases and pipelines, choose appropriate tools, and build sophisticated dashboards.
Once you have determined the desired experience level and essential skills for the job, you are ready to begin your search for the ideal BI developer by preparing a job posting.
How to Write a Business Intelligence Developer Job Description for Your Project
Choose a clear and descriptive title that incorporates the type of role, level of expertise needed, length of assignment, and/or the organization’s remote work policy. For example, the title “Hybrid position: business intelligence developer lead (6 months)” describes these factors effectively.
Next, compose the job description. Ensure that you include any explicit requirements based on the considerations outlined in your problem statement for the project. To streamline the drafting process, follow the guidelines in this BI job posting template. It is essential, however, that you tailor the description to accurately portray what a business intelligence developer does in the context of your specific project. This enables candidates to self-assess their suitability before applying.
What are the most important Business Intelligence Developer interview questions?
To ensure a thorough assessment of your candidates, come prepared with a list of targeted questions that address key aspects of the role’s competencies. Encouraging a free-flowing discussion may lead to candidates sharing unrehearsed—yet pertinent—responses, fueling more insightful follow-up inquiries. If the candidate is expected to communicate with stakeholders, they should use clear language that is accessible to both technical and nontechnical audiences, and avoid excessive jargon.
Here is a sampling of technical, BI-specific interview questions and prompts intended to elicit the kind of answers you should expect from a candidate:
How would you approach identifying and handling outliers in a data set during the data analysis phase?
This question evaluates a candidate’s expertise in data preprocessing and their aptitude for detecting and managing outliers. Expect the candidate to explain the techniques they would employ for outlier detection and management. A stellar answer would exhibit a profound understanding of statistical methodologies, such as box plots, Z-scores, or Tukey’s fences, which serve as robust tools for detecting and addressing outliers.
Explain the key principles and best practices for designing effective visualizations in a BI solution.
With this answer, you can evaluate a candidate’s ability to leverage data visualization in creating engaging visuals that surpass mere aesthetics. They should showcase their understanding of foundational concepts like simplicity, clarity, and relevance in design, and their understanding of data encoding. They should emphasize the visual hierarchy, element arrangement, strategic use of color, and appropriate chart selection. A strong candidate will demonstrate the application of these principles toward effective visual storytelling.
Describe a scenario where you had to optimize the performance and scalability of a BI solution. What strategies and techniques did you employ?
This question lets you evaluate a candidate’s practical experience with optimizing BI solutions, handling scalability challenges, and driving optimal performance in these systems. A candidate should highlight their strategy to respond to data volume growth and user demands, and discuss the practical application of techniques such as data partitioning, indexing, caching, parallel processing, and query optimization. They should explain how they leverage monitoring and performance-tuning tools to identify and address performance bottlenecks.
Which is the most important technical consideration when designing a dashboard?
This question tests a developer’s understanding of best practices for creating effective data dashboards that convey insights clearly. A well-designed dashboard optimizes interactivity to extract the maximum value from its data, enabling data-driven decision-making. The candidate should mention factors like:
Understanding the dashboard’s target audience.
Choosing relevant key performance indicators that align with business goals.
Telling a clear story through thoughtful visualizations like charts and graphs.
Achieving simplicity, clarity, and consistency in layout, labeling, and formatting.
Simplifying interactive data exploration by users through optimal use of drill-downs and filters.
Iterating and conducting A/B tests to optimize dashboard design based on user feedback.
Describe a strategy for implementing role-based access control in a BI system.
This query examines a developer’s understanding of implementing role-based access control in BI systems. A candidate should demonstrate their understanding of creating user roles, groups, and their respective permissions. They should discuss data-, object-, and row-level security. They should mention the use of single sign-on, the importance of regular permission review and updates, methods for monitoring and auditing access, and the role of user training in maintaining data security and confidentiality.
How would you design an ETL process for integrating data from multiple sources? What tools would you choose to aid you in this project?
This question tests a developer’s understanding of ETL processes, as well as their ability to design an ETL process that is robust and scalable. An applicant should describe strategies for extracting data from various sources, transforming and cleaning the data, and loading it into a data warehouse. Responses should address issues such as data quality and missing data, as well as the implementation of error handling, testing, and performance optimization in the ETL process. Look for mentions of requirements gathering, source data analysis, data extraction, data transformation, data loading, error handling and logging, metadata management, performance optimization, and data quality assurance.
Why do companies hire Business Intelligence Developers?
Companies hire business intelligence developers to leverage data as a strategic asset, enabling data-driven decision-making. These developers contribute to the improvement of operational efficiency, track performance, and drive business growth by transforming raw data into meaningful, actionable information. Given the rise in data volume and complexity, the role of BI developers in enabling the end-to-end analytics value chain has become more integral than ever. In today’s data-driven market, BI experts add value to the majority of businesses and are appropriate hires across almost every industry.
The technical content presented in this article was reviewed by Ernesto Suguer.
Featured Toptal Business Intelligence Development Publications
