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BigTree108

Scala development services

Scala development services for Apache Spark data pipelines, fintech and trading back ends, ad tech and analytics platforms, event-driven services on Akka, Apache Pekko, ZIO or Cats Effect, Play applications and moves from Scala 2 to Scala 3, with dedicated Scala developers for your team or a Scala project delivered end to end.

What we build with Scala

  • Apache Spark jobs in Scala

    Batch and streaming jobs on Spark 4 in Scala 2.13, with typed Datasets and Spark SQL over Delta Lake or Apache Iceberg tables on Databricks, Amazon EMR or Kubernetes, partitioned and tuned so each run fits its window and its budget.

  • Trading, payments and risk services

    Payment, ledger, pricing and risk services with immutable domain models, sealed types and exhaustive matches over every state a transaction can reach, BigDecimal for money and an audit trail for each change.

  • Akka and Apache Pekko systems

    Actor-based services, clusters, event sourcing and back-pressured streams on Akka under its commercial licence, or on Apache Pekko, the Apache-licensed fork of Akka 2.6, with persistence on PostgreSQL or Cassandra.

  • Functional services on ZIO and Cats Effect

    HTTP and gRPC services on ZIO 2 or Cats Effect 3 with http4s, Tapir or ZIO HTTP, Doobie or Skunk over PostgreSQL, and fs2 or ZIO Streams, with effects, errors and resources tracked in the types.

  • Kafka streaming in Scala

    Producers, consumers and stream processors on fs2-kafka, zio-kafka, Kafka Streams or Pekko Connectors, with Avro or Protobuf contracts in a schema registry, idempotent writes, retries and dead-letter topics.

  • Ad tech bidding and attribution pipelines

    Real-time bidding, attribution and audience pipelines that take events at high volume, with aggregation in Spark or ClickHouse and APIs that answer within the time a bid request allows.

  • Play Framework applications

    Web applications and APIs on Play 3, which runs on Pekko, and Play 2 applications on Akka moved across to it, with Slick or Anorm for data access and Twirl templates or a separate front end for the pages.

  • Moving from Scala 2 to Scala 3

    Scala 2.12 and 2.13 code moved to Scala 3.9, the current long-term support release, module by module with the compiler’s migration mode and Scalafix rewrites, while Spark jobs stay on Scala 2.13 for as long as Spark is built on it.

  • Scala builds, tests and dependency updates

    sbt 2 or Mill builds that reproduce from a clean checkout, MUnit or ScalaTest suites with ScalaCheck properties, Scalafmt and Scalafix in the pipeline, and Scala Steward opening a pull request for every dependency update.

Hire Scala developers

  • Dedicated Scala developers

    Scala developers who join your team full time, work in your repositories, tracker and meetings, and report to your lead. You interview them; we carry the Ukrainian contract, payroll, invoicing and leave.

  • Scala project delivery

    A team that takes the Scala project from scope to release: estimate, build, tests and deployment, with a technical lead on our side who owns the plan and the quality.

  • Scala support and take-overs

    An existing Scala system taken over from another team or kept running: a read-only review and a written list of risks first, then fixes and new features in order of impact.

The dedicated team page explains how specialists join your team, and the outsourcing page covers project delivery, take-overs and how we charge.

Who works on your Scala project

  • Scala developers

    Spark jobs and services on Akka, Pekko, ZIO or Cats Effect

  • Data engineers

    Lakehouse tables, orchestration and data quality

  • Java engineers

    JVM services beside the Scala code

  • Cloud and DevOps engineers

    Kubernetes, Spark clusters and pipelines

  • QA engineers

    API, data and load test automation

How we work on Scala

Immutable data and exhaustive pattern matching, so the compiler names the cases a change forgets; errors and effects in the types rather than in thrown exceptions; Scalafmt and Scalafix in the pipeline and a build that ends with zero warnings; and dependencies kept current, with a security advisory treated as an unconditional upgrade.

On an existing codebase we follow its style, whether that is functional Scala on Cats Effect or ZIO, actors on Akka or Pekko, or Scala written close to Java, and raise the standard one change at a time. Developers work in your repositories, your tracker and your process, and everything they write is assigned to you.

Other languages we work in

Programming languages overview

Questions about Scala development

Which industries do you build Scala systems for?

Data and analytics platforms (Spark pipelines, lakehouses and reporting), fintech, banking and trading (payment, risk and pricing services), e-commerce and marketplaces (recommendations, search and order services), ad tech and marketing (bidding, attribution and audience data), enterprise software and SaaS, and industrial and energy companies processing sensor and meter data.

Akka or Apache Pekko?

Either. Apache Pekko is the Apache-licensed fork of Akka 2.6 and the base of Play 3; Akka continues under its commercial licence. A move from Akka 2.6 to Pekko is mostly a change of package names, configuration keys and dependencies, made module by module with the tests run after each one.

Can you move our Scala 2 code to Scala 3?

Yes. Libraries and services move module by module, with the compiler’s migration mode and Scalafix doing the mechanical rewrites, implicits turned into given instances and extension methods, and macros rewritten for Scala 3 metaprogramming. Code that Spark runs stays on Scala 2.13 for as long as Spark is built with it.

How quickly can Scala developers start?

When the right Scala developer is available, the start is gated only by your interview and the NDA and IP assignment. Otherwise we run a search, which typically produces candidate profiles within two to three weeks, and nobody starts until you have said yes.

How do we hire Scala developers through BigTree108?

Tell us the work, the seniority and the hours you need. We propose one or two people with their profiles, you interview them the way you would interview your own hire, and you sign one agreement with BIG TREE 108 LLC and receive one invoice a month.

Who owns the work they produce?

You do. Every specialist has a signed contract with BigTree108 that assigns all work product to the company, and our agreement with you assigns it onward. Code, designs and documents are delivered into your own repositories and tools, not kept where only we can change them.

Need Scala developers?

Tell us the system, the Scala version and the libraries it runs on. You get an answer within one business day: candidate profiles or a plan for the work.

Email hello@bigtree108.com How we respond