Jobs Golang

Phoenix Games is a technology company building next-generation iGaming and Web3 products for a global audience. We develop scalable gaming platforms powered by modern cloud technologies, blockchain, AI, and high-performance backend systems.

As our products continue to grow, we're looking for a Junior+ Backend Developer who is passionate about backend development, enjoys solving complex technical problems, and wants to build reliable, scalable software used by players worldwide.

What You'll Do

• Develop and maintain backend services and APIs for our gaming platforms.
• Work with Go or Python to build scalable and reliable backend solutions.
• Design, implement, and integrate REST APIs and internal services.
• Work with databases and write efficient SQL queries.
• Investigate and troubleshoot bugs, performance issues, and production incidents.
• Write clean, maintainable, and well-tested code.
• Participate in code reviews and contribute to engineering best practices.
• Collaborate closely with QA Engineers, Product Managers, and other Developers throughout the development lifecycle.
• Participate in sprint planning, backlog refinement, and technical discussions.
• Contribute to improving system performance, reliability, and scalability.
• Work with cloud infrastructure and CI/CD pipelines.
• Learn and apply modern technologies related to gaming, Web3, blockchain, and AI.

Tech Stack

• Go / Python
• REST API
• PostgreSQL / SQL
• Git
• Docker
• Linux
• Redis
• Message brokers / asynchronous processing
• Swagger / OpenAPI
• CI/CD
• Cloud technologies
• Monitoring and logging tools

Requirements

• 1+ years of commercial backend development experience.
• Professional experience with either Python or Go.
• Good understanding of backend development principles and software architecture basics.
• Experience building or integrating REST APIs.
• Basic to intermediate SQL knowledge.
• Understanding of relational databases.
• Familiarity with Git and standard development workflows.
• Understanding of HTTP, JSON, and client-server architecture.
• Ability to read and understand existing code and independently investigate issues.
• Basic understanding of testing principles and writing unit tests.
• Experience working in Agile/Scrum teams.
• Strong analytical and problem-solving skills.
• Attention to detail and ownership mindset.
• Upper-Intermediate English or higher.

Nice to Have

• Experience with both Go and Python.
• Experience with PostgreSQL, Redis, or other backend data stores.
• Experience with Docker and containerized applications.
• Familiarity with CI/CD pipelines.
• Experience with AWS, GCP, Azure, or other cloud platforms.
• Understanding of microservices and distributed systems.
• Experience with message brokers such as Kafka or RabbitMQ.
• Familiarity with Kubernetes.
• Experience with high-load or real-time systems.
• Knowledge of performance testing or optimization.
• Interest in Web3, blockchain, AI, or iGaming technologies.

What We Offer

• Fully remote work from anywhere in Europe.
• Long-term B2B cooperation.
• Competitive salary paid in EUR or USD.
• Annual salary reviews.
• Performance-based bonus program.
• Annual company bonus.
• 25 paid vacation days.
• Paid sick leave.
• Flexible working hours.
• Home office budget.
• Laptop or equipment allowance.
• Learning & development budget for courses, certifications, books, and conferences.
• English language lessons.
• Private health insurance.
• Mental health support program.
• Sports and wellness compensation.
• Team-building activities and international company retreats.
• Opportunity to work with AI, Web3, blockchain, and modern cloud technologies.
• Career growth in an international product company with ambitious expansion plans.

Our Mission and Vision

At Solidgate, our mission is clear: to empower outstanding entrepreneurs to build exceptional internet companies. We exist to fuel the builders — the ones shaping the digital economy — with the financial infrastructure they deserve. To achieve that, we're on a bold path: to become the #1 payments orchestration platform in the world.

We believe the future of payments is shaped by people who think big, take ownership, and bring curiosity and drive to everything they do. That's exactly the kind of teammates we want on board.

Solidgate is part of Endeavor — a global community of the world's most impactful entrepreneurs. We're proud to be the first payment orchestrator from Europe to join — and to share our expertise within a network of outstanding global companies.

About the Team and Role

You'll join the Connectivity team — the team responsible for the user-facing services that serve as the entry point into Solidgate's payment system. It's hard to overstate how critical these services are: every millisecond of load time and every suboptimal step directly affects merchant conversion and company GMV, which means the work demands technical excellence and continuous improvement.

The team owns Payment Form and Payment Link (products that let merchants connect to Solidgate and start accepting payments within hours), e-commerce integrations such as adapters for platforms like Shopify, SDKs that make technical integration intuitive and seamless, and Merchant Config, an internal service that stores data critical to payment processing. These products are in a stage of active development, aimed at giving merchants an even more intuitive integration experience along with more room for customization, testing, and support. The strategic goal is to make integrating with Solidgate's payment system the most reliable, extensible, and developer-friendly experience on the market.

Your team — Tech Lead, 2 Backend Software Engineers, 2 Frontend Software Engineers, AQA Engineer, Product Analyst, and Product Manager.

Explore our technology stack ➡️ here.

What you'll own

Your focus will be on:

• taking part in product decisions across the full development lifecycle
• designing and building backend functionality for our products
• collaborating with other teams to deliver a flawless user experience
• improving the performance, scalability, quality, and reliability of our systems

You'll be working across key components including Payment Form/Payment Link, e-commerce integrations, SDKs, and Merchant Config — with a small team where each engineer directly influences key technical and product decisions, metrics, and ultimately the company's financial and reputational outcomes.

You're a great fit if you have:

• 5+ years of experience with Go or another statically typed language (with a willingness to move to Go)
• Experience with SQL (PostgreSQL) and distributed systems
• Experience designing reliable, scalable, high-load systems
• Experience with cloud environments (AWS/GCP)
• Strong communication skills, ownership, and a proactive mindset
• Flexibility and a results-driven approach

Nice to have

• Fintech experience and experience with high-load, user-facing systems
• Observability/Alerting tools (Prometheus, Grafana)
• Infrastructure as Code (Terraform)
• Event-driven systems (SQS / Kafka)

Why Solidgate?

High-impact role. You'll lead a team that sits right at the center of our platform's evolution — owning a critical component and shaping its direction.

Great product. We've built a fintech powerhouse that scales fast. Solidgate isn't just an orchestration player — it's the financial infrastructure for modern Internet businesses. From subscriptions to chargeback management, fraud prevention, and indirect tax — we've got it covered. We hold financial licenses in key regions and are a direct Visa & Mastercard partner and sub-reseller (top 5 globally).

Massive growth opportunity. Solidgate is scaling rapidly — this role will be a career-defining move.

Top-tier tech team. Work alongside our driving force — a proven, results-driven engineering team that delivers.

Modern engineering culture. TBDs, code reviews, solid testing practices, metrics, alerts, and fully automated CI/CD.

💌 The Extras: 30+ days off, unlimited sick leave, free office meals, health coverage, and Apple gear to keep you productive. Courses, conferences, sports and wellness benefits — all designed for ideas, focus, and fun.

Tomorrow's fintech needs your mindset. Come build it with us.

🫂 Know top talent? We're always on the lookout. Refer someone for our role, and if they get hired, there's a bonus waiting for you — simple as that.

We are looking for an AI-First Golang Team Lead for one of our product engineering pods: a hands-on engineer who uses AI to ship fast and acts as the face of their pod towards clients and leadership.

⚠️IMPORTANT: This is not a traditional coding role. You’ll use Claude Code and other AI tools to 10x your output, always thinking about how the product or feature you are working on benefits the user. Also: we have no QA team, you OWN the quality of what you ship!

🧭About this role: every engineer on the team already owns their work end-to-end (IC + DRI). Everyone in the pod is, in effect, their own architect and lead developer. So this role is not about being the strongest techie in the room or telling people how to build.

A Team Lead is the spokesperson, coordinator, and facilitator for their pod, internally with product, design, and leadership, and externally with clients. You come from the management path, not the deep-specialist path: you have seen a lot as a developer and have consciously decided that enabling a team, working with clients and driving product outcomes is what energizes you now, not coding all day.

You remain a hands-on engineer. Expect roughly 30-40% of your week on coordination, client and product work, and the rest as an individual contributor. This is not an HR-style people-management role: no performance reviews, no career coaching. As we scale, light one-on-ones and check-ins may become part of it, but the job is coordination and delivery, not administration.

🧑 💻 What you’ll actually do:

• Be the spokesperson for your pod, internally with product, design, and leadership, and externally with clients and partners.
• Coordinate work across the pod: break initiatives into chunks, sequence them, surface blockers, and facilitate hand-offs (lightweight project management; we deliberately have no project managers).
• Gather client requirements first-hand and funnel them straight into the pod so nothing gets lost in translation.
• Represent your pod in product planning sessions and bring a strong product-driven point of view to scoping and trade-offs.
• Help pod members with product decisions and prioritization, enabling engineers who may be technically stronger than you.
• Contribute hands-on as an engineer: own features end-to-end, use Claude Code to generate Golang backend code, review AI output for quality and architectural fit.
• Join client meetings to align on requirements, report on delivery, and keep the relationship professional and calm.

📚 Our stack:

• Backend: Go monorepo (no framework, 3+ services).
• Hosting: PaaS-managed containers; local setup fully mirrors production via Docker Compose.
• Tools: Jaeger tracing, Betterstack (Logging, Alerting), Redis Asynq queue.
• Databases: PostgreSQL, Redis.
• AI tooling: Claude Code (mandatory).

🚢 Products you will lead a pod on:

• An AI search & recommendation engine for major travel enterprises: heavy client integration work (SSO, security reviews, GDS integrations) with demanding enterprise customers.
• A content enrichment API: high-scale, data- and AI-focused backend work.
• Partner and supplier integrations, data ingestion pipelines, LLM providers.

✅ You must have:

• 2-3+ years of technical leadership experience leading a team, squad, pod, or similar unit (a hard must; think team lead or early-stage engineering manager).
• A developer’s background (minimum 5 years): you have seen production reality with your own hands before moving towards leading people.
• A genuinely product-driven mindset: you think about user value and business outcomes before implementation.
• Comfort facilitating and coordinating a pod without relying on formal authority.
• Willingness and ability to take part in client meetings and act as the external face of your pod.
• Excellent spoken and written English for planning sessions, stakeholder updates, and client conversations.
• Ownership mentality with a strive for elegantly simple, high-quality solutions; you test your own work thoroughly since we have no QA team.
• Proven experience using Claude Code; share specific examples.
• Solid Golang experience; you’ll review AI’s code, and you must understand how it works.
• Ability to do on-call once in a while to help maintain our platform’s reliability & uptime.
• ⚠️ European or African timezones (±3 hours from CET).
• Available full-time (40 hours/week).

❤️ You are a great fit if you:

• Made the classic developer’s fork-in-the-road decision: lifelong engineer or leading people, and chose people, clients, and product.
• Are energized by product planning sessions and have opinions about what the pod should build next, not just how.
• Are comfortable being the face of your pod, in internal planning rooms and on calls with enterprise clients.
• Enjoy enabling engineers who are technically stronger than you.
• Ship fast but always verify it actually works; think “how can AI build this?” as your first instinct.
• Get frustrated when development takes weeks instead of days.

‼️Things to consider before applying that won’t be a match:

• This would be your first leadership role.
• You see the lead as the chief architect who makes the technical decisions for the team.
• You are looking for an HR-focused people-management role built around performance reviews and career coaching.
• You want to lead a team without staying hands-on in the codebase.
• You would rather not take part in client meetings or stakeholder-facing conversations.
• You prefer to focus on execution and leave product planning to others.
• You rely on formal authority to get a team moving.
• You have never used Claude Code or similar AI coding tools.
• You are outside European/African timezones.

We’re looking for a Go Engineer to build and scale our real-time bidding (OpenRTB) ad exchange.

What you’ll do

• Design, implement, and optimize high-throughput OpenRTB auction and bidding services in Go
• Work on request/response handling, bidder adapters, auction logic, and low-latency data paths
• Improve performance, reliability, and observability of the exchange under high QPS
• Collaborate with product and infra teams on new OpenRTB features and integrations

What we’re looking for

• Strong experience with Go (concurrency, networking, performance tuning)
• Familiarity with OpenRTB / programmatic advertising or high-throughput real-time systems
• Solid understanding of HTTP, JSON, and low-latency distributed systems
• Experience with monitoring, profiling, and production debugging

Nice to have: previous work on ad exchanges, SSPs/DSPs, or similar real-time bidding platforms.

Your future responsibilities:

• Own the architecture of the authorization platform end-to-end — from design through production operations
• Design and implement sidecar-based authorization mechanisms and policy enforcement engines
• Define authorization models (RBAC, ABAC, ReBAC) and translate business requirements into enforceable policies
• Drive technical decisions on authorization infrastructure — evaluate, select, and integrate tools (OpenFGA, OPA, SpiceDB, etc.)
• Design token exchange and delegation flows (OAuth 2.0 OBO, Keycloak token exchange) for multi-service authorization
• Collaborate with platform, security, and product teams to define access control policies and architectural standards
• Mentor and enable other engineering teams on secure authorization patterns and integration best practices
• Own CI/CD pipelines and infrastructure as code for authorization services — ensuring reliability, observability, and fast delivery
• Lead incident response for authorization-related issues — troubleshoot, resolve, and drive root-cause improvements
• Contribute to technical strategy — ADRs, RFCs, technical documentation, and knowledge sharing across teams
• Leverage AI tools and automation to accelerate development, reduce toil, and improve code quality

Your skills and experience:

• 5+ years of professional Golang development
• Expert-level understanding of Go concurrency patterns, interfaces, and idiomatic Go
• Deep knowledge of authorization models and systems (RBAC, ABAC, ReBAC, Zanzibar-style)
• Hands-on experience with policy engines (OPA/Rego, OpenFGA, or similar)
• Experience designing and operating sidecar-based authorization at scale
• Strong understanding of OAuth 2.0 / OIDC flows, token exchange, and identity federation (Keycloak or similar IdP)
• Experience with PostgreSQL and data modeling for access control
• Ability to design systems for high availability, low latency, and horizontal scalability
• Practical use of AI-assisted development tools (GitHub Copilot, Claude, Cursor, etc.
• Advanced Kubernetes experience (operators, CRDs, admission webhooks, troubleshooting at cluster level)
• Experience designing and maintaining CI/CD pipelines (GitHub Actions)
• Proficiency with ArgoCD for GitOps-based continuous delivery
• Experience authoring and managing Helm charts for complex deployments
• Infrastructure as code with Terraform/Terragrunt — including module design and state management
• Observability setup for authorization services (metrics, tracing, alerting)

Nice to Have

• Experience with Google Zanzibar-inspired systems (OpenFGA, SpiceDB, Authzed) in production
• Experience with service mesh (Istio/Envoy) and integrating authorization at the mesh layer
• Familiarity with MCP (Model Context Protocol) or/and agent-based architectures and their authorization challenges
• Background in platform engineering or developer experience
• Experience with security auditing, compliance standards, or regulated environments (banking/fintech)
• Experience designing multi-tenant authorization with delegation patterns
• Contributions to open-source authorization tooling
• Experience automating workflows with AI-powered tools or building internal developer tooling

We offer what matters most to you:

• Competitive salary: we guarantee a stable income and annual bonuses for your personal contribution. Additionally, we have a referral reward program for attracting new colleagues to Raiffeisen Bank
• Social package: official employment, 28 days of paid leave, additional “maternity leave” for fathers, and financial assistance for parents upon the birth of children
• Comfortable working conditions: the possibility of a hybrid work format, offices equipped with shelters and generators, provision with modern equipment
• Wellbeing program: all employees have access to medical insurance from the first working day; consultations with a psychologist, nutritionist or lawyer; discount program for sports and shopping; family days for children and adults; massage in the office
• Learning and development: access to over 130 online educational resources; corporate training programs, online library, mentoring program
• A great team: our colleagues are a community where curiosity, talent and innovation are welcomed. We support each other, learn together and grow. You can find like-minded people in over 15 professional communities, reading or sports clubs
• Career opportunities: we encourage advancement within the bank between functions
• Innovation and technology. Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go (infra, security), Swift (IOS), Kotlin (Andorid)Datastores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink, we develop expertise in AI and actively integrate it into processes
• Support program for defenders: we preserve jobs and pay the average salary to mobilized people. We have a support program for veterans, and the Bank’s veteran community is developing. We are working to raise awareness among managers and teams on the issues of veterans’ return to civilian life. Raiffeisen Bank is recognized as one of the best employers for veterans (Forbes)

______________________________________________________________________

Твої майбутні обов’язки: 

• Повний цикл володіння архітектурою платформи авторизації — від проєктування до підтримки в production
• Проєктування та реалізація sidecar-базованих механізмів авторизації та рушіїв застосування політик
• Визначення моделей авторизації (RBAC, ABAC, ReBAC) і трансформація бізнес-вимог у політики доступу
• Прийняття технічних рішень щодо інфраструктури авторизації — оцінка, вибір та інтеграція інструментів (OpenFGA, OPA, SpiceDB тощо)
• Проєктування потоків обміну токенами та делегування доступу (OAuth 2.0 OBO, Keycloak token exchange) для авторизації між сервісами
• Співпраця з платформеними, security- та product-командами для визначення політик контролю доступу й архітектурних стандартів
• Менторинг інших engineering-команд щодо безпечних патернів авторизації та найкращих практик інтеграції
• Підтримка CI/CD-пайплайнів та infrastructure as code для сервісів авторизації — забезпечення надійності, observability і швидкої доставки змін
• Участь у реагуванні на інциденти, пов’язані з авторизацією — пошук і усунення проблем та аналіз root cause
• Внесок у технічну стратегію — ADR, RFC, технічна документація та обмін знаннями між командами
• Використання AI-інструментів та автоматизації для прискорення розробки, зменшення рутини та покращення якості коду

Твій досвід та навички:

• 5+ років професійної розробки на Golang
• Експертне розуміння concurrency patterns, interfaces та idiomatic Go
• Глибокі знання моделей та систем авторизації (RBAC, ABAC, ReBAC, Zanzibar-style)
• Практичний досвід роботи з policy engines (OPA/Rego, OpenFGA або аналогічними)
• Досвід проєктування та експлуатації sidecar-based authorization у масштабованих системах
• Сильне розуміння OAuth 2.0 / OIDC flows, token exchange та identity federation (Keycloak або інший IdP)
• Досвід роботи з PostgreSQL та моделюванням даних для систем контролю доступу
• Вміння проєктувати системи з високою доступністю, низькою затримкою та горизонтальним масштабуванням
• Практичний досвід використання AI-assisted development tools (GitHub Copilot, Claude, Cursor тощо)
• Просунутий досвід роботи з Kubernetes (operators, CRDs, admission webhooks, troubleshooting на рівні кластера)
• Досвід створення та підтримки CI/CD-пайплайнів (GitHub Actions)
• Впевнене використання ArgoCD для GitOps-based continuous delivery
• Досвід написання та підтримки Helm charts для складних деплойментів
• Infrastructure as code з Terraform/Terragrunt — включно з дизайном модулів і керуванням state
• Налаштування observability для сервісів авторизації (метрики, tracing, alerting)

Буде плюсом:

• Досвід роботи з системами на основі Google Zanzibar (OpenFGA, SpiceDB, Authzed) у production
• Досвід роботи із service mesh (Istio/Envoy) та інтеграції авторизації на рівні mesh
• Знайомство з MCP (Model Context Protocol) та/або agent-based architectures і пов’язаними викликами авторизації
• Досвід у platform engineering або developer experience
• Досвід security auditing, роботи з compliance standards або регульованими середовищами (banking/fintech)
• Досвід проєктування multi-tenant authorization із delegation patterns
• Внесок у open-source інструменти авторизації
• Досвід автоматизації workflow за допомогою AI-powered tools або створення внутрішніх developer tools

Пропонуємо те, що має значення саме для тебе: 

• Конкурентна заробітна плата: гарантуємо стабільний дохід та річні бонуси за твій особистий внесок. Додатково, у нас діє реферальна програма винагороди за залучення нових колег до Райффайзен Банку
• Соціальний пакет: офіційне працевлаштування, 28 днів оплачуваної відпустки, додатковий “декрет” для татусів, та матеріальна допомога для батьків при народженні дітей
• Комфортні умови праці: можливість гібридного формату роботи, офіси забезпеченні укриттями та генераторами, забезпечення сучасною технікою
• Wellbeing програма: для всіх співробітників доступні медичне страхування з першого робочого дня; консультації психолога, нутриціолога чи юриста; дисконт програми на спорт та покупки; family days для дітей та дорослих; масаж в офісі
• Навчання та розвиток: доступ до понад 130 навчальних онлайн-ресурсів; корпоративні навчальні програми, онлайн бібліотека, програма менторства
• Крута команда: наші колеги — це спільнота, де вітаються допитливість, талант та інновації. Ми підтримуємо один одного, вчимося разом та зростаємо. Ти можеш знайти однодумців у понад 15-ти професійних ком’юніті, читацькому чи спортивному клубах
• Кар’єрні можливості: ми заохочуємо просування всередині банку між функціями
• Інновації та технології. Infrastructure: AWS, Kubernetes, Docker, GitHub, GitHub actions, ArgoCD, Prometheus, Victoria, Vault, OpenTelemetry, ElasticSearch, Crossplain, Grafana. Languages: Java (main), Python (data), Go(infra,security), Swift (IOS), Kotlin (Andorid) Datastores: Sql-Oracle, PgSql, MsSql, Sybase. Data management: Kafka, AirFlow, Spark, Flink, розвиваємо експертизу в AI та активно інтегруємо в процеси
• Програма підтримки захисників і захисниць: ми зберігаємо робочі місця та виплачуємо середню заробітну плату мобілізованим. Для ветеранів та ветеранок у нас діє програма підтримки, розвивається ветеранська спільнота Банку. Ми працюємо над підвищенням обізнаності керівників та команд з питань повернення ветеранів до цивільного життя. Райффайзен Банк відзначений як один з найкращих роботодавців для ветеранів (Forbes)

Go Developer (Middle)

Salary range: $500 – $1500

Location: Ukraine (Remote)

Employment type: Full-time

Experience: 1+ year

A small, high-performing team is looking for a Middle Go Developer to support an experienced Senior Developer. Our project is growing, and the workload is increasing, so we are seeking a reliable specialist ready to dive into backend service development, write clean code, and grow alongside the team.

What you will be doing:

• Developing and supporting microservices in Go
• Designing and optimizing REST APIs / gRPC
• Participating in architectural discussions with the Senior Engineer and developing standalone modules
• Writing unit and integration tests
• Optimizing database performance and participating in Code Reviews

Our expectations (Must-have):

• 1–2 years of commercial software development experience with Go
• Solid understanding of Concurrency (goroutines, channels, context)
• Experience with PostgreSQL / MySQL (writing and optimizing SQL queries)
• Good grasp of REST API and gRPC / Protocol Buffers
• Experience with Docker and Git
• Basic knowledge of NoSQL (Redis / Memcached)
• Ability to use AI tools for code assistance and AI agents for automating routine tasks to boost personal productivity

Nice to have:

• Experience with message brokers (RabbitMQ / Kafka / NATS)
• Understanding the basics of Kubernetes and CI/CD
• Basic Linux skills

What we offer:

• Fully remote work setup
• 8-hour working day (flexible schedule can be discussed after the interview)
• Working closely with a strong Senior Go Developer (we expect self-reliance: before asking a question, you try to find the answer on your own first, but if stuck - help is always nearby)
• Minimal bureaucracy and fast decision-making processes
• Timely payouts

We look forward to receiving your CV! Please note: A short technical task and a brief video introduction are required prior to the interview.

Simplify
Keep energy for life.

The daily quantum leap of technology development requires people to continually upgrade their skills to manage more complicated programs and devices. It consumes time and energy.

We work for simplifying the digital experience of people by making a wide range of functionally excellent IT products that are still intuitively usable. From the landing page for the one-time event up to the total automation of the business.

We work diligently and adequately because we value our and your time and energy.

If you share our principles — we will be pleased to work with You.We are looking for 

2x Senior Golang / Kubernetes Developers

Start: August / September 2026

Duration: Permanent +

Industry: Staffing and Recruiting

Go/Golang, Kubernetes, Kubernetes Operators, Cloud & Edge, Bare Metal

WHAT YOU'LL BE WORKING ON

• Building and maintaining the core banking system and Internet acquiring service within a financial ecosystem
• Participating in product architecture design: proposing and implementing technical solutions, reviewing system design decisions
• Optimizing database queries and ensuring efficient data synchronization, transmission, and processing
• Implementing new business logic across microservices
• Working with metrics: integrating observability tools, optimizing performance, and monitoring system health in production

WHAT YOU NEED TO SUCCEED IN THIS ROLE

• 4–5+ years in backend development, including 2+ years of production experience with Golang
• Deep knowledge of Go and its ecosystem: goroutines, channels, memory model, standard library
• Strong understanding of concurrent and multithreaded programming
• Solid SQL skills and hands-on experience with relational databases in production
• Proven experience designing and maintaining microservice architectures
• Strong grasp of software design principles: SOA, SOLID, KISS, DRY
• Familiarity with Clean Architecture and Domain-Driven Design (DDD)
• Readiness to take ownership of architectural decisions and drive them to implementation
• Experience in fintech is a plus, but not required
• English — Intermediate or higher (written and spoken)

OUR TECH STACK

• Go, PostgreSQL, Redis, DynamoDB, Kafka, RabbitMQ, gRPC

We are Lumos Codes Blockchain \ AI outsourcing company looking for Go-lang backend engineer for fresh project for our client;

Project is treasury and accounting service for the crypto-casino, responsible for deposit wallet generation, deposits, withdrawals, swaps and in-game balance changes; 

Service is built over Fireblocks so previous experience is nice to have and works with EVM \ Solana and Tron chains for reconciliation and sanity checks.

Service is built as integration component for the casino service and follows REST\microservices patterns;

Core responsibilities:

* Cooperating with architect to design the system from scratch following domain and go-lang best-practices
* Cooperating with core team to provide clean integration interface
* Develop maintainable and performant code

* Verify code with unit, functional and E2E tests
* Participate in daily activities to keep project progressing

What we offer:
* No bureaucracy in any aspect of the cooperation

* No "do it nice" specs; the product and lead engineer will help with clarifying and building any project related specs
* Competitive and timely payment

Interview steps:

We have a single 1.5h interview with Tech Lead and that's it

Timeline:
* 3-months project with possibility to work after the release (based on client plans)

* Start date "ASAP", project starts at the begging of the September 

MOR.AI is building the next generation of payment infrastructure — a Merchant of Record platform and a network of PayFacs.

We’re looking for our second technical hire — someone who can take the product from 0 → 1, build the platform from scratch, and eventually grow into a CTO role.

This is not a corporate job. You’ll own the architecture, infrastructure and delivery from day one.

What you’ll do

• Architect and build the entire V1 platform from scratch in Go
• Own backend, APIs, infrastructure and complex billing systems
• Design and build MoR / PayFac architecture
• Work hands-on with payment infrastructure, acquirer integrations and card network rules
• Make key technical decisions and move fast
• Build and lead the engineering team as the company scales
• Take ownership of the technical function as the company grows

What we’re looking for

Payments experience is mandatory. We’re looking for someone with hands-on experience in payment infrastructure and payment systems, including PayFacs, acquirers and card networks.

You should:

• Have strong backend engineering experience with Go / Golang
• Be able to independently architect and build a V1 product
• Be comfortable being the only developer for an extended period
• Have hands-on experience with payments
• Understand payment infrastructure, billing systems and MoR / PayFac architecture
• Think like a founder, not a corporate employee
• Be highly hands-on, fast and execution-oriented
• Be AI-native and use tools such as Cursor, Copilot, Claude, etc. to significantly accelerate development
• Have the ambition to build and lead an engineering team

The opportunity

• Base salary: market or below-market
• Significant % of EBITDA — real profit sharing, not just illiquid equity
• Clear, performance-based path to CTO
• Become the first technical hire and have real ownership from day one

If you’re looking for a comfortable corporate role, this is probably not for you.

If you want to build something from the ground up, shape the architecture, build the team and participate directly in the profits — let’s talk.

Hiring process

1. CV + relevant experience review
2. Initial screening
3. Culture alignment
4. Technical deep dive + architecture review
5. Final interview with the Founder

We move fast and respect everyone’s time.

Our client is the leader in the Early Childhood Education (ECE) sector, providing the most widely used developmental assessment and curriculum system in the US. They are looking for a talented, innovative, and experienced Senior Backend (Go) Software Engineer to join their established product team responsible for building and enhancing key platform capabilities, working on software that supports millions of daily users.

Their Software Engineering team is responsible for building SaaS solutions used by educational organizations across the globe. The team works on a wide variety of projects, solving existing problems while enabling new business objectives. They believe that great technology experts are also software generalists who are unafraid to jump up and down the stack to solve the challenges that come their way. If you enjoy working in a collaborative, fast-paced environment, are curious about how products work, and love building scalable software, this opportunity is for you.

As a Senior Backend (Go) Software Engineer, you will:

• Develop new features, components, and modules to support organizational growth;
• Build and maintain robust backend services and APIs powering a high-traffic SaaS platform;
• Participate in planning, analysis, and design of new software solutions;
• Investigate, troubleshoot, and resolve performance bottlenecks across the application;
• Design and build scalable, reliable backend solutions using modern software architecture principles;
• Learn new technologies and stay up to date with both established and emerging best practices;

• Work independently while collaborating closely with cross-functional team members to ensure successful project delivery.

   

Qualifications:

• 8+ years of production experience in software engineering and SaaS product development;
• Senior-level knowledge of Golang;
• Experience designing and building scalable distributed systems;
• Strong understanding of modern software architecture, including SOA and microservices;
• Strong knowledge of relational databases (e.g. PostgreSQL);
• Working knowledge of AWS and familiarity with services such as Kubernetes, Redis, and SQS/SNS;
• Excellent debugging, testing, and problem-solving skills;
• Strong communication and listening skills, with the ability to explain complex technical challenges, perform root cause analysis, and propose effective solutions;
• Curiosity to understand how products work and a genuine interest in technology;
• Experience working in Agile development environments;
• Commitment to security, accessibility, and performance best practices;
• Self-starter with a strong sense of collaboration, teamwork, and accountability;
• Experience using AI developer tools (e.g. Codex);
• Familiarity with LLM/AI APIs and prompt-based workflows;
• Databricks experience is considered a plus, but is not required.

Job Title:

Block-Builder Engineer

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

About the Product:

An advanced block construction platform operating on the Ethereum mainnet that processes order flow, transaction bundles, and submits finalized blocks through relay networks in real time. It addresses neutral and efficient block building to unlock new decentralized finance capabilities, including intrablock lending and execution extensions. The system handles high-throughput data pipelines and strict latency requirements, backed by comprehensive observability and analytics to drive iterative improvements based on live production metrics. Strong engineers are essential to maintain system health under real-time load, verify data-driven hypotheses, and innovate on core protocol logic.

About the Role:

The Block-Builder Engineer will join an experienced team in Kraków or Warsaw to develop and maintain a next-generation Ethereum block construction system. You will own pipeline components that ingest order flow and transaction bundles, manage relay submission paths, and ensure stable performance under real-time load. Your work will include building and refining observability platforms, conducting controlled A/B experiments, and driving reliability improvements such as panic mitigation and latency regression detection. As you ramp, you will contribute to optimization-driven block building logic, on-chain intrablock lending protocols, and an execution extension, gaining autonomy and deep technical ownership across the core stack.

Key Responsibilities:

- Integrate and process order-flow ingestion, bundle and transaction handling, back-pressure management, and reintegration of data for block inputs.

- Develop and maintain relay submission paths to ensure end-to-end block delivery under production load.

- Build and enhance telemetry and dashboards using Grafana, Prometheus, Loki and SQL to provide trusted observability.

- Diagnose and correct measurement issues—broken counters, misleading dashboards, and erroneous denominators—to maintain metric accuracy.

- Design, execute and analyze controlled A/B experiments in production, reporting findings objectively, including inconclusive results.

- Identify and resolve system panics, dropped messages, and latency regressions, with automated tests to prevent recurrence.

- Optimize data pipelines and processing systems for high-throughput, low-latency performance.

- Contribute to the development of intrablock lending protocols and associated trusted-execution components.

- Collaborate on an execution extension (BEX) and future protocol and exchange-layer enhancements.

Required Competence and Skills:

- 2–4 years of professional software engineering experience shipping and operating production systems.

- Minimum 2 years working on Ethereum or other EVM-compatible blockchains.

- Proficiency in Rust or strong systems experience in Go, C++ or Java with eagerness to adopt Rust.

- Solid understanding of concurrent and real-time code within large, existing codebases.

- Strong SQL skills and practical experience with Python for data analysis and tooling.

- Familiarity with monitoring and analytics tooling and a drive to ensure metric correctness.

- Rigorous engineering habits, including comprehensive testing and clear distinction between verified and assumed behavior.

- Data-driven mindset with a habit of querying logs and databases to validate change impact.

Nice to Have:

- Exposure to Ethereum block-building protocols (PBS/MEV), smart contract interactions, or trading systems.

- Experience with high-throughput data pipelines, time-series databases, or large-scale analytics.

- Familiarity with Ethereum client internals (reth, geth, revm) or deploying services on Kubernetes and Docker.

Why Us:

We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

We offer a highly competitive package with yearly performance and compensation reviews.

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Senior Go Engineers! 

Requirements:

• 4+ years of experience with Go programming language.
• Proven ability to design and implement scalable and reliable software solutions.
• Strong understanding of event-driven architecture.
• Experience with containerization and orchestration tools like Docker and Kubernetes.
• Hands-on experience with RDBMS and/or NoSQL databases.
• Strong understanding of event-driven architecture + hands-on experience with Event Brokers.
• Experience with observability — implementing logs, metrics, and tracing.
• Proficiency in working with cloud platforms such as Google Cloud Platform (GCP) and/or AWS.
• Proficient in using Git, GitLab, and GitLab CI for source control and continuous integration.
• Excellent problem-solving abilities.
• Strong time management and organizational skills to handle multiple tasks effectively.
• Upper-intermediate level of English, both written and verbal.
   

Nice to have:

• Familiarity with the Twelve-Factor App methodology.
• Knowledge of Cloud Events and GitOps practices.
   

Responsibilities:

• Develop high-performance, testable, and maintainable code to deliver new functionality.
• Conduct code reviews to ensure quality, maintain standards, and share knowledge across the team.
• Integrate industry-leading third-party services into the platform.
• Mentor team members and actively share knowledge to foster growth and collaboration.
• Propose and implement innovative technical initiatives to improve systems and processes.
   

Why Join Us:

• Flexible remote or hybrid working format based on your location.
• No Time Trackers: We value trust and focus on results.
• Career growth, professional development, and regular performance reviews.
   

Hiring Steps: HR Interview > Technical Interview (no test task, no live-coding needed) > Reference check > Offer
 

Our benefits to you:
☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location 
 

What this is about
 

We are a fast-growing software house looking for a mid-level GoLang Software Engineer to join a fully remote team.

Your main focus will be the backend: designing and building reliable services, APIs, and data flows, improving the architecture and performance of our platform, and turning product requirements into robust systems that users rely on every day.

At the same time, you will not work in isolation from the rest of the stack. You will collaborate closely with the frontend and infrastructure side, and when needed you may also touch deployment, databases, and other parts of the platform. We value engineers who understand how the product works end to end, even if their strongest area is backend.

If you enjoy building clean, maintainable systems, solving complex technical problems, and care about reliability, performance, and good software architecture, this position is for you.
 

How we think about AI
 

AI coding tools are part of our daily work, and we want them to be part of yours too. For us, they are a great way to:

• write faster the parts you already understand, while always reviewing, validating, and correcting what they produce
• reason through problems and test new solutions
• learn something new along the way

What we are not looking for is someone who pastes output they would not be able to understand or explain.

The tool speeds up the work, but your brain must remain the one making the decisions.
 

What you will do
 

• Develop and release new backend features from start to finish
• Design, build, and maintain reliable services and APIs in Go
• Work with databases, queues, caches, and other backend infrastructure
• Improve the performance, scalability, and reliability of existing services
• Collaborate closely with frontend and infrastructure engineers
• Write clean, well-tested, maintainable, and production-ready code
• Debug and troubleshoot issues across distributed systems
• Work with different stakeholders in an async-first environment
   

Who we are looking for

• At least 2 years of experience as a software engineer, preferably with a strong backend focus
• Experience with Go (Golang) is required
• Good understanding of backend development, REST APIs, databases, concurrency, distributed systems, and service-oriented architecture
• Familiarity with SQL and working with relational databases
• Ability to write clean, maintainable, and well-tested production code
• Comfortable debugging issues and reasoning about performance and reliability
• Independent thinking: AI is a tool, not a shortcut to avoid thinking
   

What we offer

• Fully remote work from anywhere in the European time zone
• Flexible hours, async-first culture, zero micromanagement
• Location-based benefits, where applicable

Senior Backend Engineer (Go)

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

About the Product:

Our client operates a cloud-based platform dedicated to corporate ground transportation management, addressing a multi-billion-dollar market. The solution aggregates multiple transportation providers—such as corporate fleets, ride-hailing services, taxi operators, and limousine networks—into a unified system that helps businesses streamline operations and reduce spend. It serves a significant share of the largest companies worldwide and handles high volumes of transactions and data across diverse geographies. The platform’s core challenges include integrating heterogeneous external services, maintaining reliability under high-load conditions, implementing advanced business logic for scheduling and pooling, and providing accurate cost control and reporting. Strong backend engineering is critical to scaling global coverage, ensuring performance, and delivering a seamless user experience.

About the Role:

You will join a cross-functional development team responsible for core backend services that directly impact end users. The role offers full ownership of feature delivery—from reviewing product requirements and defining technical designs alongside architects and product managers, through to coding, testing, deployment, and monitoring in production. You will serve as first-line support for your services, proactively identify and address reliability and performance issues, and collaborate with other teams to ensure end-to-end system integrity. This position demands technical leadership, a hands-on approach to system architecture, and the ability to influence both engineering and product decisions. You will work remotely with periodic team gatherings and receive the tools and environment needed to deliver tangible business impact in a fast-paced, agile setting.

Key Responsibilities:

• Lead end-to-end development of backend microservices, including implementation, deployment, and production monitoring.

• Translate product requirements into scalable technical designs, data models, and RESTful APIs.

• Integrate with external transportation providers and internal systems to enable reliable, real-time workflows.

• Analyze and optimize system performance and database queries under high-load scenarios.

• Propose and implement architectural improvements to enhance resilience, scalability, and maintainability.

• Maintain and refactor existing services to improve code quality, test coverage, and observability.

• Collaborate with cross-functional teams and mentor peers on best practices in coding, testing, and operations.

• Participate in agile ceremonies, including backlog grooming and sprint planning, to align deliverables with business priorities.

Required Competence and Skills:

• 5+ years of backend software development experience in Golang (willingness to work with Ruby). 

• Proven experience designing and implementing data-driven applications using relational databases (e.g., PostgreSQL) and NoSQL stores (e.g., Redis).

• Solid understanding of RESTful API design principles and the HTTP protocol.

• Hands-on experience with Agile/Scrum methodologies and iterative delivery.

• Proficiency in writing unit tests and applying automated testing practices.

• Strong English communication skills, both verbal and written.

• Ability to understand complex business domains and translate needs into optimal technical solutions.

• Deep understanding of system architecture, high-load applications, and concurrency principles.

Nice to Have:

• Expertise in performance tuning of relational databases.

• Familiarity with gRPC and Protocol Buffers.

• Prior work on high-load, distributed systems.

• Background in building concurrent applications.

Why Us:

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

We offer a highly competitive package with yearly performance and compensation reviews.